@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
    --bg-color: #07111f;
    --card-bg: rgba(15, 23, 42, 0.78);
    --secondary-color: rgba(15, 23, 42, 0.92);
    --text-color: #e5eefb;
    --text-muted: #9aabc4;
    --accent-color: #5aa9e6;
    --accent-glow: rgba(90, 169, 230, 0.16);
    --error-color: #ef4444;
    --success-color: #3fbf7f;
    --border-color: rgba(148, 163, 184, 0.18);
    --input-bg: rgba(15, 23, 42, 0.84);
    --gradient-color: #12233d;
    --card-shadow: 0 22px 48px rgba(2, 8, 23, 0.38);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.light-mode {
    --bg-color: #f4f7fb;
    --card-bg: #ffffff;
    --secondary-color: #edf3fa;
    --text-color: #112033;
    --text-muted: #53657d;
    --accent-color: #1d6fa5;
    --accent-glow: rgba(29, 111, 165, 0.12);
    --border-color: #d6dfeb;
    --input-bg: #f8fbff;
    --gradient-color: #dbe6f2;
    --card-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at top right, rgba(90, 169, 230, 0.12), transparent 32%),
        radial-gradient(circle at top left, rgba(63, 191, 127, 0.08), transparent 22%),
        linear-gradient(180deg, var(--gradient-color) 0%, var(--bg-color) 38%);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    display: flex;
    /* Removed justify-content and align-items to allow natural content flow */
    min-height: 100vh; /* Use min-height to allow content to extend beyond viewport */
    width: 100vw;
    margin: 0;
    /* Removed overflow: hidden; overflow-x: hidden; */
    /* Added overflow-y: auto to body to handle overall page scrolling if content exceeds min-height */
    overflow-y: auto;
    overflow-x: hidden; /* Prevent horizontal scroll on body */
    display: flex;
    flex-direction: column;
}
#app-container {
    width: 90%; /* Make it responsive */
    max-width: 800px; /* Set a max width for larger screens */
    margin: 0 auto; /* Center the container */
    padding: 2rem; /* Reduced padding for better fit */
    z-index: 10;
    flex: 1;
    /* Changed overflow properties for the main content area */
    overflow-y: auto; /* Allow vertical scrolling within the container */
    overflow-x: hidden; /* Prevent horizontal scrolling within the container */
    display: flex;
    flex-direction: column;
}
#app-container::-webkit-scrollbar {
    width: 10px;
}

#app-container::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.4);
    border-radius: 999px;
}

#app-container::-webkit-scrollbar-track {
    background: transparent;
}

/* Hide scrollbar visuals everywhere while keeping scrolling functional */
* {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

*::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
    background: transparent;
}

/* Header Styling */
.app-header {
    width: 90%; /* Match app-container width */
    max-width: 800px; /* Match app-container max-width */
    margin: 0 auto; /* Center the header */
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 20;
    flex-shrink: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    width: fit-content;
    height: fit-content;
    padding: 8px;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    cursor: pointer;
    box-shadow: none;
    color: var(--text-color);
}

.theme-toggle:hover {
    background: var(--border-color);
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.05em;
    color: var(--accent-color);
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.logo:hover {
    filter: brightness(1.2);
}

.ai-status {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--secondary-color);
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--success-color);
    animation: pulse 2s infinite;
}

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-glow);
    transition: width 0.4s ease;
    z-index: 100;
}



.view-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
    animation: fadeIn 0.5s ease-out forwards;
}


.hidden { display: none !important; }

.view-title {
    font-weight: 800;
    font-size: 2.75rem;
    letter-spacing: -0.025em;
    margin-bottom: 0.25rem;
    color: var(--text-color);
    width: 100%;
    animation: slideUp 0.6s ease-out forwards;
    line-height: 1.08;
}

/* Loading and Charm Views */
.loader-container, .charm-container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    width: 100%;
}

.loading-text { font-weight: 800; margin-bottom: 0.5rem; }
.loading-subtext { font-style: italic; opacity: 0.85; }

.charm-message {
    font-size: 1.12rem;
    line-height: 1.75;
    color: var(--text-color);
    max-width: 550px;
    margin: 2rem 0;
    animation: fadeIn 1s ease-out 0.2s forwards;
    opacity: 0;
}

.quiz-intro {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: -0.5rem;
}
.view-description {
    max-width: 500px;
    animation: slideUp 0.6s ease-out 0.1s forwards;
    opacity: 0;
    font-size: 1.02rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 1.25rem;
    animation: slideUp 0.6s ease-out 0.2s forwards;
    opacity: 0;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

p {
    color: var(--text-muted);
    line-height: 1.6;
}

.textarea-wrapper {
    position: relative;
    width: 100%;
}

textarea {
    width: 100%;
    height: 180px;
    background: var(--input-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 1.25rem;
    border-radius: 12px;
    resize: none;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    outline: none;
}

textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

/* MCQ State Colors */
.option-correct {
    background: var(--success-color) !important;
    color: white !important;
    border-color: transparent !important;
    opacity: 1 !important;
}

.option-incorrect {
    background: var(--error-color) !important;
    color: white !important;
    border-color: transparent !important;
}

.char-counter {
    position: absolute;
    bottom: 0.75rem;
    right: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    pointer-events: none;
}

button {
    background: var(--accent-color);
    color: #f8fbff;
    padding: 0.95rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.98rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    margin-bottom: 10px;
    box-shadow: 0 10px 18px rgba(8, 15, 28, 0.18);
    text-transform: none;
    letter-spacing: 0.01em;
    width: fit-content;
}

.magical-btn {
    background: linear-gradient(135deg, #2c7fb8 0%, #5aa9e6 100%);
    color: white;
    padding: 1rem 1.8rem;
    border-radius: 13px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 14px 28px rgba(17, 71, 110, 0.22);
}

.magical-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(17, 71, 110, 0.26);
    filter: brightness(1.03);
}

.roadmap-path {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    padding: 2rem 0;
    width: 100%;
}

.roadmap-step {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 600px;
    cursor: pointer;
    transition: var(--transition);
}

.first-step {
    transform: none;
    border-color: var(--accent-color);
    box-shadow: 0 14px 30px rgba(8, 15, 28, 0.18);
    background: linear-gradient(180deg, var(--card-bg), rgba(90, 169, 230, 0.08));
}

.mastered-step {
    border-color: var(--success-color);
    border-width: 2px;
}

.mastered-step .step-circle {
    background: var(--success-color);
}

.step-circle {
    width: 60px;
    height: 60px;
    background: var(--accent-color);
    color: #f8fbff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    flex-shrink: 0;
}

.step-content { text-align: left; }
.comfort-note { display: block; font-size: 0.8rem; color: var(--success-color); font-style: italic; margin-top: 0.5rem; font-weight: 600; }
.time-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; width: 100%; max-width: 500px; }
.grading-hint { font-size: 0.9rem; font-style: italic; margin-top: 1rem; }

/* Focus Mode Layout */
.step-study-container { width: 100%; max-width: 800px; } /* Adjusted to fit within app-container */
.step-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; width: 100%; margin: 2rem 0; text-align: left; }
.step-summary-panel, .step-challenge-panel { display: flex; flex-direction: column; gap: 1rem; }
.step-header { display: flex; justify-content: space-between; align-items: center; width: 100%; }

.substep-card {
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    width: 100%;
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-bottom: 2rem;
    text-align: center;
}

.step-overview-panel {
    width: 100%;
    margin-bottom: 1rem;
}

.roadmap-step-chip {
    cursor: default;
}

.roadmap-step-stage {
    display: inline-flex;
    margin-bottom: 0.9rem;
    padding: 0.32rem 0.65rem;
    border-radius: 999px;
    background: rgba(90, 169, 230, 0.12);
    color: var(--accent-color);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.roadmap-step-prompt {
    font-size: 1.5rem;
    color: var(--text-color);
    margin: 1rem 0 1.25rem;
    font-weight: 600;
    line-height: 1.5;
}

.roadmap-substep-progress {
    justify-content: flex-start;
    margin: 10px;
}

.roadmap-flashcard-cue,
.roadmap-flashcard-task {
    width: 100%;
    text-align: left;
    border-radius: 16px;
}

.roadmap-flashcard-cue {
    padding: 1rem 1.05rem 1.1rem;
    border: 1px solid rgba(59, 130, 246, 0.22);
    background: rgba(90, 169, 230, 0.08);
}

.roadmap-flashcard-task {
    margin: 0.95rem 0 0.2rem;
    padding-top: 0.95rem;
    border-top: 1px solid rgba(148, 163, 184, 0.22);
}

.roadmap-flashcard-task .roadmap-substep-progress {
    margin-top: 0;
}

.roadmap-flashcard-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.7rem;
    padding: 0.26rem 0.55rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(59, 130, 246, 0.16);
    color: var(--accent-color);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.roadmap-flashcard-label-secondary {
    background: transparent;
    border-color: rgba(148, 163, 184, 0.22);
    color: var(--text-muted);
}

.roadmap-flashcard-front {
    margin: 0;
    color: var(--text-color);
    font-size: 1.18rem;
    font-weight: 700;
    line-height: 1.55;
    letter-spacing: -0.01em;
}

.roadmap-flashcard-instruction {
    margin: 0.85rem 0 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.62;
}

.roadmap-step-prompt-flashcard {
    margin: 0.55rem 0 1.1rem;
}

.roadmap-step-learn-card {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    text-align: left;
}

.roadmap-step-learn-title {
    margin: 0;
    font-size: 1.4rem;
    line-height: 1.35;
    letter-spacing: -0.02em;
    color: var(--text-color);
}

.roadmap-step-learn-concept {
    margin: 0;
    color: var(--text-color);
    line-height: 1.78;
    font-size: 1.3rem;
    font-weight: normal;
    letter-spacing: -0.01em;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    background: rgba(90, 169, 230, 0.08);
    border: 1px solid var(--accent-color);
}

.roadmap-step-learn-note {
    margin: 0.5rem 0 0;
    color: var(--text-muted);
    line-height: 1.65;
    font-size: 0.92rem;
    padding-top: 0.85rem;
    border-top: 1px solid rgba(148, 163, 184, 0.18);
}

.roadmap-step-learn-list {
    margin: 0.15rem 0 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.9rem;
}

.roadmap-step-learn-list li + li {
    margin-top: 0.25rem;
}

.roadmap-step-read-card {
    padding: 0.35rem 0;
}

.progress-dots { display: flex; gap: 0.5rem; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border-color); }
.dot.active { background: var(--accent-color); box-shadow: 0 0 10px var(--accent-glow); }
.dot.done { background: var(--success-color); }

.flashcard { perspective: 1000px; height: 200px; cursor: pointer; }
.flashcard-inner { position: relative; width: 100%; height: 100%; transition: transform 0.6s; transform-style: preserve-3d; }
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
    position: absolute; width: 100%; height: 100%; backface-visibility: hidden;
    display: flex; align-items: center; justify-content: center; padding: 2rem;
    border-radius: 15px; font-size: 1.5rem; font-weight: 700;
}
.flashcard-front { background: var(--input-bg); border: 1px dashed var(--accent-color); }
.flashcard-back { background: var(--accent-color); color: #f8fbff; transform: rotateY(180deg); }

.secondary-btn {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    box-shadow: none;
    text-transform: none;
    letter-spacing: normal;
}

.secondary-btn:hover {
    background: rgba(90, 169, 230, 0.08);
    color: var(--text-color);
    border-color: var(--accent-color);
    box-shadow: none;
}

.subject-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    width: 100%;
    max-width: 500px;
    margin-top: 1rem;
}
.subject-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem !important;
    width: 100% !important;
    font-size: 1.1rem !important;
}

.subject-card small {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.subject-card[aria-disabled="true"] {
    opacity: 0.72;
    border-style: dashed;
}

.subject-card[aria-disabled="true"]:hover {
    transform: none;
}

.subject-icon {
    font-size: 2rem;
}

.selection-status {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    animation: fadeIn 0.5s ease-out;
}

.status-chip {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-chip:hover {
    border-color: var(--accent-color);
    background: var(--border-color);
    transform: translateY(-2px);
}

.status-chip span {
    color: var(--accent-color);
}

.drop-zone {
    width: 100%;
    padding: 1rem;
    border: 2px dashed rgba(90, 169, 230, 0.24);
    background: var(--input-bg);
    border-radius: 12px;
    text-align: center;
    color: var(--text-muted);
    transition: var(--transition);
    margin: 0;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.drop-zone.drag-over {
    border-color: var(--accent-color);
    background: rgba(90, 169, 230, 0.08);
    transform: translateY(-1px);
}

.drop-zone:hover {
    border-color: rgba(90, 169, 230, 0.45);
    background: rgba(90, 169, 230, 0.04);
}

.drop-zone p {
    margin: 0.5rem 0;
    font-size: 1rem;
}

.file-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.file-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--accent-color);
    background: rgba(90, 169, 230, 0.1);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    border: 1px solid rgba(56, 189, 248, 0.2);
    overflow: hidden;
}

.remove-file-btn {
    background: transparent;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0 0.5rem;
    margin: 0;
    line-height: 1;
    transition: var(--transition);
    flex-shrink: 0;
    width: auto;
}

.remove-file-btn:hover {
    filter: brightness(1.2);
    transform: scale(1.1);
    box-shadow: none;
}

.hidden-file-input {
    display: none;
}

.file-upload-btn {
    background: rgba(90, 169, 230, 0.12);
    color: var(--accent-color);
    border: 1px solid rgba(90, 169, 230, 0.28);
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    box-shadow: none;
    width: auto;
}

.file-upload-btn:hover {
    background: rgba(90, 169, 230, 0.18);
}

.upload-picker-row {
    justify-content: center;
    gap: 0.75rem;
    margin-top: 0.9rem;
    flex-wrap: wrap;
}

.upload-picker-row .file-upload-btn {
    min-width: 10rem;
}

#camera-capture-btn {
    display: none;
}

@media (max-width: 1024px) {
    #camera-capture-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

.clear-all-li {
    justify-content: center !important;
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
}

.clear-all-btn {
    background: transparent;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    font-size: 0.8rem;
    text-decoration: underline;
    width: auto;
    box-shadow: none;
    padding: 0.5rem;
    opacity: 0.8;
    transition: var(--transition);
}

.clear-all-btn:hover {
    opacity: 1;
    background: transparent;
    box-shadow: none;
    transform: scale(1.05);
}

/* Modal Notification */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--overlay-bg);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    border: 2px solid var(--accent-color);
    padding: 3rem;
    border-radius: 24px;
    max-width: 600px;
    width: 50%;
    min-width: min(90vw, 22rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-content p {
    font-size: 1.25rem;
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
}

.modal-content.modal-has-form {
    align-items: stretch;
}

.modal-body {
    width: 100%;
}

.modal-form {
    display: grid;
    gap: 1rem;
    width: 100%;
}

.modal-field {
    display: grid;
    gap: 0.45rem;
    text-align: left;
}

.modal-field label,
.modal-field legend {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-color);
}

.modal-fieldset {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 0.85rem 1rem 1rem;
    margin: 0;
}

.modal-choice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
    gap: 0.65rem;
}

.modal-choice-btn {
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-color);
    min-height: 3rem;
    border-radius: 12px;
    padding: 0.7rem 0.75rem;
    font-size: 0.95rem;
    font-weight: 700;
}

.modal-choice-btn.is-selected {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px rgba(90, 169, 230, 0.16), 0 10px 24px rgba(19, 34, 56, 0.14);
    background: rgba(90, 169, 230, 0.12);
}

.modal-choice-btn span {
    display: block;
    font-size: 0.74rem;
    font-weight: 600;
    opacity: 0.74;
    margin-top: 0.15rem;
}

.modal-textarea,
.modal-select {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text-color);
    padding: 0.85rem 0.95rem;
    font: inherit;
}

.modal-textarea {
    min-height: 132px;
    resize: vertical;
}

.modal-helper {
    font-size: 0.82rem;
    color: var(--muted-text);
    margin: -0.2rem 0 0;
    line-height: 1.5;
}

.footer-report-btn {
    margin-top: 0.45rem;
}

.help-layout {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem 2.5rem;
}

.help-shell {
    text-align: left;
}

.faq-list {
    display: grid;
    gap: 1rem;
    width: 100%;
    margin-top: 1.5rem;
}

.faq-item {
    width: 100%;
    max-height: none;
    overflow: visible;
}

.faq-item p {
    margin: 0;
    line-height: 1.75;
}

.modal-content.error { border-color: var(--error-color); }
.modal-content.success { border-color: var(--success-color); }

button:hover {
    filter: brightness(1.04);
    transform: translateY(-2px);
    box-shadow: 0 14px 26px rgba(8, 15, 28, 0.22);
}

button:active { transform: translateY(1px); }

button:focus-visible,
textarea:focus-visible,
input:focus-visible,
.status-chip:focus-visible,
.logo:focus-visible,
.roadmap-step:focus-visible,
.text-action-btn:focus-visible {
    outline: 3px solid rgba(90, 169, 230, 0.55);
    outline-offset: 3px;
}

/* Lock State UX */


.ui-locked .ai-feedback-box {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

.ai-feedback-box {
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    border-radius: 0 12px 12px 0;
    text-align: left;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

body.light-mode .ai-feedback-box {
    background: #eef7ff;
}

.ai-feedback-box.feedback-state-correct {
    border-color: rgba(34, 197, 94, 0.72);
}

.ai-feedback-box.feedback-state-needs-revision {
    border-color: rgba(239, 68, 68, 0.72);
}

body.light-mode .ai-feedback-box.feedback-state-correct {
    background: #f1fbf4;
}

body.light-mode .ai-feedback-box.feedback-state-needs-revision {
    background: #fff4f4;
}

body:not(.light-mode) .ai-feedback-box.feedback-state-correct {
    background: linear-gradient(180deg, rgba(16, 40, 28, 0.94), rgba(19, 54, 35, 0.88));
}

body:not(.light-mode) .ai-feedback-box.feedback-state-needs-revision {
    background: linear-gradient(180deg, rgba(60, 20, 24, 0.94), rgba(86, 28, 32, 0.88));
}

.correct-answer-box {
    border-left: 4px solid var(--success-color);
    padding: 1.5rem;
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    border-radius: 0 12px 12px 0;
    text-align: left;
    font-family: 'JetBrains Mono', monospace;
}

body.light-mode .correct-answer-box {
    background: #eefaf3;
}

.exam-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.exam-grid input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 1rem;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
}

body.light-mode .exam-grid input,
body.light-mode #exam-steps {
    background: #ffffff;
    border: 1px solid var(--border-color);
}

.final-answer-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
}

.badge {
    background: #b45309;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 800;
    display: inline-block;
    width: fit-content;
    margin-bottom: 1rem;
}

.exam-brief-grid,
.exam-status-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    width: 100%;
    margin: 1.25rem 0;
}

.exam-brief-card,
.exam-status-card {
    background: linear-gradient(180deg, var(--card-bg), var(--secondary-color));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.1rem 1rem;
    text-align: left;
}

.exam-brief-label,
.exam-status-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.exam-brief-card strong,
.exam-status-card strong {
    font-size: 1.05rem;
    color: var(--text-color);
}

.exam-brief-panel {
    max-height: none;
}

.exam-options-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.exam-type-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.exam-type-card,
.exam-option-card {
    background: linear-gradient(180deg, rgba(180, 83, 9, 0.12), rgba(245, 158, 11, 0.06));
    border: 1px solid rgba(245, 158, 11, 0.28);
    border-radius: 18px;
    padding: 1rem;
    text-align: left;
    width: 100%;
    box-shadow: none;
}

.exam-type-card {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.exam-type-card.selected,
.exam-option-card.selected,
.exam-option-card.recommended {
    border-color: #f59e0b;
    box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.18);
}

.exam-type-card:hover,
.exam-option-card:hover {
    transform: translateY(-3px);
    border-color: #f59e0b;
    background: linear-gradient(180deg, rgba(180, 83, 9, 0.16), rgba(245, 158, 11, 0.1));
}

.exam-type-chip,
.exam-option-topline {
    margin-bottom: 0.9rem;
}

.exam-type-chip {
    display: inline-flex;
    padding: 0.28rem 0.58rem;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-color);
    border: 1px solid rgba(59, 130, 246, 0.18);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.exam-option-topline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
}

.exam-option-peppers {
    font-size: 1rem;
    letter-spacing: 0.08em;
}

.exam-option-count {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.exam-option-recommendation {
    display: inline-flex;
    margin-bottom: 0.7rem;
    padding: 0.25rem 0.55rem;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.14);
    color: #f59e0b;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.exam-option-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
}

.exam-type-card h3,
.exam-option-card p {
    margin: 0;
}

.exam-type-card h3 {
    font-size: 1rem;
    margin-bottom: 0.45rem;
}

.exam-type-card p,
.exam-option-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.exam-paper-shell {
    width: 100%;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.84), rgba(10, 15, 25, 0.96));
    border: 1px solid rgba(245, 158, 11, 0.22);
    border-radius: 24px;
    padding: 1.5rem;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
    margin-bottom: 1.5rem;
}

body.light-mode .exam-paper-shell {
    background: linear-gradient(180deg, #fffdf7, #f8f4ea);
    border-color: rgba(180, 83, 9, 0.18);
}

.exam-paper-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.25rem;
}

.exam-paper-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    font-weight: 700;
}

.exam-question-shell {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 1.25rem;
}

body.light-mode .exam-question-shell {
    background: rgba(180, 83, 9, 0.03);
    border-color: rgba(180, 83, 9, 0.16);
}

.exam-rules-panel {
    background: linear-gradient(180deg, rgba(180, 83, 9, 0.08), rgba(245, 158, 11, 0.04));
    border-color: rgba(245, 158, 11, 0.22);
}

.coach-panel {
    width: 100%;
    margin: 1rem 0 1.5rem;
    padding: 1.25rem 1.3rem;
    border-radius: 20px;
    border: 1px solid rgba(56, 189, 248, 0.18);
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.08), rgba(16, 185, 129, 0.05));
    text-align: left;
}

body.light-mode .coach-panel {
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.06), rgba(16, 185, 129, 0.04));
}

.coach-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.coach-panel-header h3 {
    margin: 0;
    font-size: 1.05rem;
}

.coach-score-pill-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.35rem;
}

.coach-score-pill-meta {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 700;
}

.coach-panel-label {
    display: inline-block;
    margin-bottom: 0.35rem;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 700;
}

.coach-score-pill {
    flex-shrink: 0;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.12);
    color: var(--accent-color);
    font-size: 0.78rem;
    font-weight: 700;
}

.coach-summary {
    margin: 0 0 1rem;
    color: var(--text-color);
}

.coach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.coach-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1rem;
}

body.light-mode .coach-card {
    background: rgba(255, 255, 255, 0.65);
}

.coach-card-label {
    display: inline-block;
    margin-bottom: 0.45rem;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 700;
}

.coach-card p {
    margin: 0;
    line-height: 1.6;
}

.coach-signal-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.coach-signal-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
}

.coach-signal-list span {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.coach-signal-list strong {
    text-align: right;
    font-size: 0.95rem;
}

.coach-topic-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.coach-topic-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

body.light-mode .coach-topic-list li {
    border-bottom-color: rgba(15, 23, 42, 0.08);
}

.coach-topic-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.coach-topic-list span {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.action-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    width: 100%;
}

.primary-btn {
    background: linear-gradient(135deg, #2f9f6a 0%, #45bf82 100%);
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.topic-stat-item {
    list-style: none;
    margin-bottom: 1.5rem;
}

.topic-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.topic-bar-bg {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.topic-bar-fill {
    height: 100%;
    background: var(--accent-color);
    transition: width 1s ease-out;
}

.pattern-warning {
    color: var(--error-color);
    font-weight: 600;
    list-style: none;
    padding: 1rem;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 8px;
    border-left: 4px solid var(--error-color);
    margin-top: 0.5rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    flex-shrink: 0;
    padding: 1rem;
}

footer p,
footer span {
    text-align: center;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 900px) {
    .exam-options-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .exam-type-grid {
        grid-template-columns: 1fr;
    }

    .coach-grid {
        grid-template-columns: 1fr;
    }

    .exam-brief-grid,
    .exam-status-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .exam-options-grid {
        grid-template-columns: 1fr;
    }

    .exam-brief-grid,
    .exam-status-grid {
        grid-template-columns: 1fr;
    }

    .exam-paper-head {
        flex-direction: column;
    }
}

@media (max-width: 900px) {
    #app-container,
    .app-header {
        width: calc(100% - 2rem);
        max-width: none;
    }

    .step-header {
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 700px) {
    #app-container {
        padding: 1.25rem 0 2rem;
    }

    .app-header {
        padding: 0.85rem 0;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }

    .view-title {
        font-size: 2.15rem;
    }

    .view-description,
    .charm-message {
        font-size: 1rem;
    }

    .subject-grid,
    .time-grid,
    .step-layout,
    .final-answer-row {
        grid-template-columns: 1fr;
    }

    .selection-status,
    .action-row {
        flex-direction: column;
        align-items: stretch;
    }

    .selection-status {
        width: 100%;
    }

    .status-chip,
    button,
    .subject-card,
    .file-upload-btn,
    .theme-toggle,
    .ai-status {
        width: 100%;
    }

    .theme-toggle {
        max-width: 52px;
    }

    .roadmap-step,
    .substep-card,
    .modal-content {
        padding: 1.25rem;
    }

    .roadmap-step {
        align-items: flex-start;
        gap: 1rem;
    }

    .step-circle {
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }

    .step-header {
        flex-direction: column;
    }

    .progress-dots {
        flex-wrap: wrap;
    }

    .flashcard-front,
    .flashcard-back {
        font-size: 1.2rem;
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .view-title {
        font-size: 1.85rem;
    }

    textarea {
        height: 160px;
        padding: 1rem;
    }

    .char-counter {
        right: 0.75rem;
        bottom: 0.65rem;
    }

    .modal-content p {
        font-size: 1.05rem;
    }

    .logo {
        font-size: 1.1rem;
    }
}

/* =========================================
   Professional Clean UI Override
========================================= */

:root {
    --bg-color: #0b1220;
    --card-bg: rgba(17, 24, 39, 0.88);
    --secondary-color: rgba(30, 41, 59, 0.95);
    --text-color: #e5edf8;
    --text-muted: #94a3b8;
    --accent-color: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.22);
    --error-color: #ef4444;
    --success-color: #22c55e;
    --border-color: rgba(148, 163, 184, 0.18);
    --input-bg: rgba(15, 23, 42, 0.9);
    --gradient-color: #111827;
    --card-shadow: 0 18px 40px rgba(2, 8, 23, 0.24);
    --transition: all 0.24s ease;
    --overlay-bg: rgba(2, 8, 23, 0.56);
    --surface-soft: rgba(255, 255, 255, 0.03);
    --success-solid: #059669;
    --success-contrast-text: #f8fafc;
    --error-solid: #dc2626;
    --error-contrast-text: #fef2f2;
    --flashcard-stack-layer-top: rgba(37, 48, 67, 0.88);
    --flashcard-stack-layer-mid: rgba(22, 32, 49, 0.94);
    --flashcard-card-bg: linear-gradient(180deg, #162033 0%, #0f172a 100%);
    --flashcard-card-border: rgba(148, 163, 184, 0.24);
    --flashcard-card-shadow: 0 32px 60px rgba(2, 8, 23, 0.34);
    --flashcard-chip-bg: rgba(59, 130, 246, 0.16);
    --flashcard-chip-color: #bfdbfe;
    --flashcard-chip-border: rgba(96, 165, 250, 0.26);
    --flashcard-chip-muted-bg: rgba(255, 255, 255, 0.04);
    --flashcard-chip-muted-color: #94a3b8;
    --flashcard-chip-muted-border: rgba(148, 163, 184, 0.2);
    --flashcard-surface-bg: radial-gradient(circle at top, rgba(59, 130, 246, 0.14), transparent 58%), linear-gradient(180deg, rgba(30, 41, 59, 0.96) 0%, rgba(17, 24, 39, 0.98) 100%);
    --flashcard-surface-border: rgba(96, 165, 250, 0.22);
    --flashcard-text-color: #e5edf8;
    --flashcard-answer-input-bg: rgba(15, 23, 42, 0.94);
    --flashcard-answer-input-border: rgba(96, 165, 250, 0.18);
}

body.light-mode {
    --bg-color: #f3f7fc;
    --card-bg: rgba(255, 255, 255, 0.94);
    --secondary-color: #ffffff;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --accent-color: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.16);
    --error-color: #dc2626;
    --success-color: #16a34a;
    --border-color: rgba(148, 163, 184, 0.24);
    --input-bg: #ffffff;
    --gradient-color: #dbe7f5;
    --card-shadow: 0 20px 48px rgba(15, 23, 42, 0.08);
    --overlay-bg: rgba(15, 23, 42, 0.34);
    --surface-soft: rgba(15, 23, 42, 0.04);
    --success-solid: #059669;
    --success-contrast-text: #ffffff;
    --error-solid: #dc2626;
    --error-contrast-text: #ffffff;
    --flashcard-stack-layer-top: rgba(248, 250, 252, 0.96);
    --flashcard-stack-layer-mid: rgba(241, 245, 249, 0.98);
    --flashcard-card-bg: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    --flashcard-card-border: rgba(148, 163, 184, 0.28);
    --flashcard-card-shadow: 0 32px 60px rgba(15, 23, 42, 0.18);
    --flashcard-chip-bg: rgba(37, 99, 235, 0.1);
    --flashcard-chip-color: #1d4ed8;
    --flashcard-chip-border: rgba(59, 130, 246, 0.16);
    --flashcard-chip-muted-bg: rgba(15, 23, 42, 0.05);
    --flashcard-chip-muted-color: #475569;
    --flashcard-chip-muted-border: rgba(148, 163, 184, 0.18);
    --flashcard-surface-bg: radial-gradient(circle at top, rgba(96, 165, 250, 0.12), transparent 58%), linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
    --flashcard-surface-border: rgba(59, 130, 246, 0.24);
    --flashcard-text-color: #0f172a;
    --flashcard-answer-input-bg: #ffffff;
    --flashcard-answer-input-border: rgba(59, 130, 246, 0.2);
}

body::before {
    display: none;
}

body {
    background:
        radial-gradient(circle at top right, rgba(59, 130, 246, 0.08), transparent 28%),
        linear-gradient(180deg, var(--gradient-color) 0%, var(--bg-color) 42%);
    color: var(--text-color);
}

#app-container,
.app-header {
    max-width: 880px;
}

#app-container {
    padding: 2.25rem 2rem 3rem;
}

.app-header {
    padding: 1rem 2rem 0;
}

.view-section {
    gap: 1.35rem;
}

.view-title::before,
#roadmap-step-view #step-study-title::before,
#results-view h1::before {
    content: none !important;
    display: none !important;
}

.view-title,
#roadmap-step-view #step-study-title,
#results-view h1 {
    color: var(--text-color);
    font-size: clamp(2.15rem, 5vw, 3.05rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.06;
    margin: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.view-description,
.charm-message,
.loading-subtext,
.grading-hint,
.coach-summary,
.roadmap-step p,
.reference-panel p,
.modal-content p,
.exam-option-card p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.72;
}

.loader-container,
.charm-container {
    min-height: 340px;
}

.logo {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    font-size: 1.18rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    text-transform: none;
}

.logo:hover {
    color: var(--accent-color);
}

.header-actions {
    gap: 0.75rem;
}

.theme-toggle,
.ai-status,
.status-chip {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 14px;
    box-shadow: none;
    font-family: 'Inter', sans-serif;
    text-transform: none;
    letter-spacing: normal;
}

.theme-toggle {
    min-height: 42px;
    min-width: 42px;
    padding: 0.7rem 0.8rem;
}

.theme-toggle:hover,
.status-chip:hover {
    background: var(--secondary-color);
    border-color: rgba(59, 130, 246, 0.28);
    color: var(--text-color);
}


.progress-bar {
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), #60a5fa);
    box-shadow: none;
}
.input-group {
   display: flex;
   background: transparent;
   border: none;
   
}

.drop-zone,
.reference-panel,
.roadmap-step,
.substep-card,
.modal-content,
.ai-feedback-box,
.correct-answer-box,
.coach-panel,
.exam-paper-shell,
.exam-brief-card,
.exam-status-card,
.exam-brief-panel,
.exam-question-shell,
.subject-card,
.time-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.reference-panel,
.coach-panel,
.modal-content,
.ai-feedback-box,
.correct-answer-box,
.exam-brief-panel,
.exam-question-shell {
    background: var(--secondary-color);
}

textarea,
input[type="text"],
.quiz-formula,
.quiz-steps,
.quiz-result,
.quiz-unit,
.user-answer {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    font-size: 0.98rem;
    line-height: 1.65;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

textarea::placeholder,
input[type="text"]::placeholder,
.user-answer::placeholder {
    color: color-mix(in oklab, var(--text-muted) 80%, transparent);
}

.practice-stimulus,
.practice-card,
.practice-error-block,
.practice-figure-block {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.practice-stimulus,
.practice-card {
    margin-top: 1rem;
    padding: 1rem 1.1rem;
}

.practice-stimulus-title,
.practice-field-group span,
.practice-helper,
.practice-blank-slot,
.practice-order-index,
.practice-flash-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.practice-stimulus p,
.practice-inline-prompt,
.practice-order-text,
.practice-error-block,
.practice-figure-block p {
    margin: 0;
    color: var(--text-color);
    line-height: 1.7;
}

.practice-stimulus {
    display: grid;
    gap: 0.45rem;
}

.practice-inline-prompt {
    font-size: 1rem;
    font-weight: 600;
}

.practice-blank-slot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 6rem;
    margin: 0 0.35rem;
    padding: 0.25rem 0.55rem;
    border-radius: 999px;
    border: 1px dashed rgba(59, 130, 246, 0.42);
    background: rgba(59, 130, 246, 0.08);
    color: var(--accent-color);
}

.practice-helper {
    margin-top: 0.75rem;
    line-height: 1.6;
}

.practice-field,
.practice-select,
.practice-fill-input,
.practice-error-text,
.practice-step-input,
.practice-table-input {
    width: 100%;
    margin-top: 0.8rem;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    color: var(--text-color);
    padding: 0.85rem 0.95rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.96rem;
    line-height: 1.6;
}

.practice-error-text,
.practice-step-input {
    min-height: 140px;
    resize: vertical;
}

.practice-chip-grid,
.practice-matching-grid,
.practice-categorization-grid,
.practice-diagram-labels,
.practice-step-fields {
    display: grid;
    gap: 0.85rem;
}

.practice-chip-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.practice-chip {
    width: 100%;
    justify-content: flex-start;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    text-align: left;
}

.practice-chip.selected {
    background: linear-gradient(135deg, var(--accent-color), #60a5fa);
    border-color: rgba(96, 165, 250, 0.45);
    color: #f8fbff;
}

.practice-match-row,
.practice-category-row,
.practice-field-group {
    display: grid;
    gap: 0.5rem;
}

.practice-match-row span,
.practice-category-row span {
    color: var(--text-color);
    font-weight: 600;
}

.practice-order-list {
    display: grid;
    gap: 0.75rem;
}

.practice-order-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.8rem;
    align-items: center;
    padding: 0.85rem 0.95rem;
    border-radius: 14px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.practice-order-actions {
    display: flex;
    gap: 0.45rem;
}

.practice-order-btn {
    padding: 0.45rem 0.7rem;
    font-size: 0.82rem;
}

.practice-error-block,
.practice-figure-block {
    padding: 1rem;
    margin-bottom: 0.85rem;
}

.practice-table-shell {
    overflow-x: auto;
}

.practice-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 460px;
}

.practice-table th,
.practice-table td {
    padding: 0.7rem;
    border: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
}

.practice-table th {
    background: var(--surface-soft);
    color: var(--text-color);
    font-weight: 700;
}

.practice-table-input {
    margin-top: 0;
    min-width: 120px;
}

textarea:focus,
input[type="text"]:focus,
.quiz-formula:focus,
.quiz-steps:focus,
.quiz-result:focus,
.quiz-unit:focus,
.user-answer:focus,
button:focus-visible,
.status-chip:focus-visible,
.logo:focus-visible,
.roadmap-step:focus-visible,
.text-action-btn:focus-visible {
    outline: none;
    border-color: rgba(59, 130, 246, 0.52);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
}

button,
.primary-btn,
.magical-btn,
.secondary-btn,
.file-upload-btn,
.subject-card,
.time-card {
    border-radius: 14px;
    font-family: 'Inter', sans-serif;
    font-size: 0.96rem;
    font-weight: 700;
    text-transform: none;
    letter-spacing: -0.01em;
}

button {
    padding: 0.92rem 1.35rem;
    box-shadow: none;
}

.primary-btn,
.magical-btn,
#start-btn,
#submit-answer-btn,
#submit-exam-btn,
#substep-next-btn,
#find-weak-points-btn,
#make-plan-btn,
#retake-diff-btn {
    background: linear-gradient(135deg, var(--accent-color), #60a5fa);
    border: 1px solid rgba(96, 165, 250, 0.45);
    color: #f8fbff;
    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.2);
}

.primary-btn:hover,
.magical-btn:hover,
#start-btn:hover,
#submit-answer-btn:hover,
#submit-exam-btn:hover,
#substep-next-btn:hover,
#find-weak-points-btn:hover,
#make-plan-btn:hover,
#retake-diff-btn:hover {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #ffffff;
    box-shadow: 0 18px 34px rgba(37, 99, 235, 0.24);
    transform: translateY(-1px);
    filter: none;
}

.secondary-btn,
.file-upload-btn,
.subject-card,
.time-card,
.text-action-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.secondary-btn:hover,
.file-upload-btn:hover,
.subject-card:hover,
.time-card:hover {
    background: var(--secondary-color);
}

.subject-grid,
.time-grid,
.exam-brief-grid,
.exam-status-grid,
.coach-grid {
    gap: 1rem;
}

.subject-card,
.time-card {
    padding: 1.15rem;
    text-align: left;
    align-items: flex-start;
}

.subject-card small {
    color: var(--text-muted);
}

.status-chip,
.char-counter,
.coach-panel-label,
.coach-card-label,
.exam-brief-label,
.exam-status-label,
.roadmap-step-stage,
.roadmap-step-chip,
.coach-score-pill,
.exam-option-recommendation,
.badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.status-chip,
.roadmap-step-chip,
.coach-score-pill,
.exam-option-recommendation,
.badge {
    border-radius: 999px;
}

.roadmap-step {
    padding: 1.4rem;
    gap: 1.1rem;
}

.roadmap-step:hover {
    border-color: rgba(59, 130, 246, 0.28);
}

.first-step {
    background: linear-gradient(180deg, var(--card-bg), rgba(59, 130, 246, 0.06));
    border-color: rgba(59, 130, 246, 0.28);
    box-shadow: var(--card-shadow);
}

.mastered-step {
    background: linear-gradient(180deg, var(--card-bg), rgba(34, 197, 94, 0.06));
    border-color: rgba(34, 197, 94, 0.24);
}

.step-circle {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(96, 165, 250, 0.08));
    border: 1px solid rgba(59, 130, 246, 0.24);
    color: var(--accent-color);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
}

.progress-dots {
    gap: 0.55rem;
}

.dot {
    width: 22px;
    height: 6px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.26);
}

.dot.active {
    background: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.dot.done {
    background: var(--success-color);
}

.flashcard {
    height: 220px;
}

.flashcard-front,
.flashcard-back {
    border-radius: 18px;
    border: 1px solid var(--border-color);
    font-family: 'Inter', sans-serif;
    font-size: 1.02rem;
}

.flashcard-front {
    background: var(--secondary-color);
}

.flashcard-back {
    background: linear-gradient(135deg, var(--accent-color), #60a5fa);
    color: #ffffff;
}

.coach-card {
    background: var(--surface-soft);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.coach-topic-list li,
.coach-signal-list li {
    border-bottom-color: rgba(148, 163, 184, 0.14);
}

.exam-option-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.exam-type-card {
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.exam-type-card:hover,
.exam-type-card.selected,
.exam-option-card.selected,
.exam-option-card.recommended,
.exam-option-card:hover {
    background: var(--secondary-color);
    border-color: rgba(59, 130, 246, 0.34);
    transform: translateY(-1px);
    box-shadow: 0 20px 36px rgba(15, 23, 42, 0.2);
}

.exam-option-recommendation,
.roadmap-step-stage,
.coach-score-pill {
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-color);
    border: 1px solid rgba(59, 130, 246, 0.18);
}

.exam-paper-shell,
.exam-question-shell,
.exam-rules-panel {
    border-radius: 20px;
}

.exam-paper-head {
    border-bottom: 1px solid var(--border-color);
}

.flashcard-exam-mode .exam-question-shell {
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
}

.flashcard-exam-mode .display-question {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.exam-flashcard-layout {
    display: grid;
    gap: 1rem;
}

.exam-flashcard-stage {
    text-align: center;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.exam-flashcard-stack {
    position: relative;
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    padding-top: 18px;
}

.exam-flashcard-stack::before,
.exam-flashcard-stack::after {
    content: '';
    position: absolute;
    inset: 30px 30px 0;
    border-radius: 28px;
    background: var(--flashcard-stack-layer-top);
    border: 1px solid rgba(148, 163, 184, 0.24);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.exam-flashcard-stack::before {
    transform: rotate(-2.2deg);
}

.exam-flashcard-stack::after {
    inset: 16px 18px 0;
    transform: rotate(1.5deg);
    background: var(--flashcard-stack-layer-mid);
}

.exam-flashcard-card {
    position: relative;
    z-index: 1;
    min-height: 300px;
    padding: 1.1rem 1.2rem 1.4rem;
    border-radius: 28px;
    border: 1px solid var(--flashcard-card-border);
    background: var(--flashcard-card-bg);
    box-shadow: var(--flashcard-card-shadow);
    display: flex;
    flex-direction: column;
}

.exam-flashcard-meta {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.exam-flashcard-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.42rem 0.78rem;
    border-radius: 999px;
    background: var(--flashcard-chip-bg);
    color: var(--flashcard-chip-color);
    border: 1px solid var(--flashcard-chip-border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.exam-flashcard-chip-muted {
    background: var(--flashcard-chip-muted-bg);
    color: var(--flashcard-chip-muted-color);
    border-color: var(--flashcard-chip-muted-border);
}

.exam-flashcard-surface {
    flex: 1;
    border-radius: 22px;
    border: 1px solid var(--flashcard-surface-border);
    background: var(--flashcard-surface-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.75rem;
    text-align: center;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.exam-flashcard-text {
    margin: 0;
    color: var(--flashcard-text-color);
    font-size: clamp(1.35rem, 2vw + 0.9rem, 2rem);
    line-height: 1.5;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.exam-flashcard-instruction {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
    color: var(--text-muted);
}

.exam-flashcard-answer-area {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
}

.flashcard-exam-mode .exam-flashcard-answer-area .symbol-tray,
.flashcard-exam-mode .exam-flashcard-answer-area .ui-component-options,
.flashcard-exam-mode .exam-flashcard-answer-area .ui-component-exact,
.flashcard-exam-mode .exam-flashcard-answer-area .textarea-wrapper {
    width: 100%;
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1rem;
}

.flashcard-exam-mode .exam-flashcard-answer-area .symbol-tray {
    margin-bottom: 0.9rem;
}

.flashcard-exam-mode .exam-flashcard-answer-area .ui-component-options {
    grid-template-columns: 1fr;
    margin: 0;
}

.flashcard-exam-mode .exam-flashcard-answer-area .subject-card {
    min-height: 62px;
    justify-content: flex-start;
}

.flashcard-exam-mode .exam-flashcard-answer-area .user-answer,
.flashcard-exam-mode .exam-flashcard-answer-area .quiz-formula,
.flashcard-exam-mode .exam-flashcard-answer-area .quiz-steps,
.flashcard-exam-mode .exam-flashcard-answer-area .quiz-result,
.flashcard-exam-mode .exam-flashcard-answer-area .quiz-unit {
    background: var(--flashcard-answer-input-bg);
    border-color: var(--flashcard-answer-input-border);
}

.flashcard-exam-mode .exam-flashcard-answer-area .user-answer {
    min-height: 150px;
}

.ai-feedback-box {
    border-left: 4px solid var(--accent-color);
}

.correct-answer-box {
    border-left: 4px solid var(--success-color);
}

.modal-content {
    border-width: 1px;
}

.modal-content.error {
    border-color: rgba(239, 68, 68, 0.34);
}

.modal-content.success {
    border-color: rgba(34, 197, 94, 0.34);
}

.topic-bar-bg {
    background: rgba(148, 163, 184, 0.16);
    border-radius: 999px;
}

.topic-bar-fill {
    background: linear-gradient(90deg, var(--accent-color), #60a5fa);
}

body .option-correct {
    background: rgba(34, 197, 94, 0.14) !important;
    border-color: rgba(34, 197, 94, 0.3) !important;
    color: var(--text-color) !important;
}

body .option-incorrect {
    background: rgba(239, 68, 68, 0.12) !important;
    border-color: rgba(239, 68, 68, 0.24) !important;
    color: var(--text-color) !important;
}

@media (max-width: 768px) {
    #app-container,
    .app-header {
        width: 94%;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: 2rem;
    }

    .roadmap-step,
    .substep-card,
    .modal-content,
    .reference-panel,
    .coach-panel,
    .exam-type-card,
    .exam-option-card,
    .exam-paper-shell {
        padding: 1.1rem;
    }

    .exam-flashcard-card {
        min-height: 250px;
        padding: 1rem;
    }

    .exam-flashcard-stack::before,
    .exam-flashcard-stack::after {
        inset-inline: 14px;
    }

    .app-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.85rem;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        gap: 0.65rem;
    }

    .header-actions .theme-toggle,
    .header-actions .ai-status {
        width: auto;
        max-width: none;
        flex: 1 1 auto;
    }

    #language-toggle {
        min-width: 88px;
    }

    .ai-status {
        justify-content: center;
        text-align: center;
    }
}

/* Alignment audit layer */
html {
    box-sizing: border-box;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

body {
    width: 100%;
}

#app-container,
.app-header,
footer {
    width: min(960px, calc(100% - 2rem));
    max-width: none;
    box-sizing: border-box;
}

.app-header {
    padding: 1rem 0 0.75rem;
    gap: 1rem;
}

#app-container {
    padding: 1rem 0 2.5rem;
    overflow: visible;
    gap: 1.5rem;
}

.header-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
    min-width: 0;
}

.theme-toggle,
.ai-status,
.status-chip,
.subject-card,
    .time-card,
    .exam-type-card,
    .exam-option-card,
    .exam-brief-card,
    .exam-status-card,
.roadmap-step,
.substep-card,
.reference-panel,
.drop-zone,
.coach-panel,
.exam-paper-shell,
.exam-question-shell,
.ai-feedback-box,
.correct-answer-box,
.modal-content,
.file-upload-btn,
button,
textarea,
input[type="text"] {
    max-width: 100%;
}

.view-section {
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.view-section > * {
    max-width: 100%;
}

.view-title,
.view-description,
.display-question,
.charm-message,
.quiz-intro {
    overflow-wrap: anywhere;
}

body .reference-panel {
    width: 100%;
    max-height: none;
    overflow: visible;
    padding: 1.1rem 1.2rem;
    border-radius: 16px;
}

body .panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

body .text-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0.45rem 0.75rem;
    border-radius: 10px;
}

body .category-header {
    width: 100%;
    margin-top: 1rem;
    padding-bottom: 0.6rem;
}

.selection-status,
.action-row {
    width: 100%;
    flex-wrap: wrap;
    align-items: stretch;
}

.selection-status {
    justify-content: flex-start;
}

.action-row {
    justify-content: flex-end;
}

.action-row > :first-child:not(:only-child) {
    margin-right: auto;
}

.subject-grid,
.time-grid,
.exam-brief-grid,
.exam-status-grid,
.exam-type-grid,
.exam-options-grid,
.coach-grid,
.step-layout {
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.subject-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 155px), 1fr));
}

.time-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.exam-brief-grid,
.exam-status-grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.exam-options-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.step-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.step-summary-panel,
.step-challenge-panel,
.ui-library-target,
.exam-paper-head,
.exam-option-topline,
.topic-info {
    min-width: 0;
}

.roadmap-step,
.substep-card,
.exam-paper-shell,
.exam-question-shell,
.drop-zone,
.coach-panel,
.ai-feedback-box,
.correct-answer-box,
.exam-type-card,
.exam-option-card,
.exam-brief-card,
.exam-status-card {
    width: 100%;
    min-width: 0;
}

.roadmap-step {
    max-width: none;
}

.drop-zone p,
.reference-panel p,
.reference-panel li,
.file-list li,
.status-chip span,
.exam-brief-card strong,
.exam-status-card strong,
.exam-option-card p {
    overflow-wrap: anywhere;
}

.file-list,
.file-list li {
    width: 100%;
}

textarea,
input[type="text"],
.quiz-formula,
.quiz-steps,
.quiz-result,
.quiz-unit,
.user-answer {
    width: 100%;
    min-width: 0;
}

footer {
    margin: 0 auto;
    padding: 1rem 0 2rem;
}

@media (max-width: 900px) {
    #app-container,
    .app-header,
    footer {
        width: calc(100% - 1.5rem);
    }

    .time-grid,
    .step-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    #app-container,
    .app-header,
    footer {
        width: calc(100% - 1rem);
    }

    .app-header {
        padding-top: 0.85rem;
        align-items: stretch;
    }

    .header-actions {
        width: 100%;
        justify-content: stretch;
    }

    .header-actions .theme-toggle,
    .header-actions .ai-status {
        flex: 1 1 0;
    }

    .selection-status,
    .action-row {
        flex-direction: column;
    }

    .action-row > :first-child:not(:only-child) {
        margin-right: 0;
    }

    .action-row > * {
        width: 100%;
    }

    .selection-status > * {
        width: 100%;
    }

    .exam-flashcard-card {
        min-height: 220px;
    }

    .exam-flashcard-surface {
        padding: 1.2rem;
    }

    .exam-flashcard-text {
        font-size: 1.18rem;
    }
}

/* Compact responsive tuning */
@media (max-width: 1280px) {
    #app-container,
    .app-header,
    footer {
        width: min(920px, calc(100% - 1.5rem));
    }

    #app-container {
        padding: 0.9rem 0 2rem;
        gap: 1.1rem;
    }

    .app-header {
        padding: 0.85rem 0 0.55rem;
        gap: 0.85rem;
    }

    .view-section {
        gap: 1rem;
    }

    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: clamp(1.95rem, 3.6vw, 2.55rem);
        padding-bottom: 0.55rem;
    }

    .view-description,
    .charm-message,
    .loading-subtext,
    .grading-hint,
    .coach-summary,
    .roadmap-step p,
    .reference-panel p,
    .reference-panel li,
    .modal-content p,
    .exam-option-card p,
    .exam-type-card p {
        font-size: 0.94rem;
        line-height: 1.55;
    }

    .quiz-intro {
        font-size: 0.88rem;
        margin-bottom: -0.2rem;
    }

    .display-question {
        font-size: clamp(1.2rem, 1.3vw + 0.95rem, 1.7rem);
        line-height: 1.35;
    }

    .loader-container,
    .charm-container {
        min-height: 270px;
    }

    .logo {
        font-size: 1.08rem;
    }

    .header-actions,
    .selection-status,
    .action-row,
    .subject-grid,
    .time-grid,
    .exam-brief-grid,
    .exam-status-grid,
    .exam-type-grid,
    .exam-options-grid,
    .coach-grid {
        gap: 0.75rem;
    }

    .theme-toggle {
        min-height: 38px;
        min-width: 38px;
        padding: 0.58rem 0.68rem;
    }

    .ai-status,
    .status-chip {
        padding: 0.48rem 0.72rem;
        font-size: 0.75rem;
    }

    button,
    .primary-btn,
    .magical-btn,
    .secondary-btn,
    .file-upload-btn,
    .subject-card,
    .time-card {
        font-size: 0.9rem;
    }

    button {
        padding: 0.8rem 1.1rem;
    }

    body .reference-panel,
    .roadmap-step,
    .substep-card,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .exam-type-card,
    .exam-option-card,
    .exam-brief-card,
    .exam-status-card,
    .drop-zone,
    .ai-feedback-box,
    .correct-answer-box,
    .modal-content {
        border-radius: 16px;
    }

    body .reference-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .exam-type-card,
    .exam-option-card,
    .exam-brief-card,
    .exam-status-card,
    .modal-content,
    .drop-zone,
    .ai-feedback-box,
    .correct-answer-box {
        padding: 0.95rem 1rem;
    }

    .subject-card,
    .time-card {
        padding: 0.95rem;
    }

    .subject-card .subject-icon {
        font-size: 1.55rem;
    }

    .subject-card small {
        font-size: 0.74rem;
    }

    .roadmap-path {
        gap: 1rem;
        padding: 1.1rem 0;
    }

    .roadmap-step {
        padding: 1.05rem;
        gap: 0.85rem;
    }

    .step-circle {
        width: 46px;
        height: 46px;
        border-radius: 14px;
        font-size: 0.92rem;
    }

    .step-header {
        gap: 0.85rem;
    }

    .substep-card {
        padding: 1.15rem;
        min-height: 260px;
    }

    .roadmap-step-prompt {
        font-size: 0.98rem;
    }

    .roadmap-substep-progress {
        margin-bottom: 0.85rem;
    }

    .roadmap-flashcard-cue {
        padding: 0.9rem 0.95rem 1rem;
    }

    .roadmap-flashcard-front {
        font-size: 1.06rem;
    }

    .roadmap-flashcard-instruction {
        font-size: 0.9rem;
    }

    .flashcard {
        height: 188px;
    }

    .flashcard-front,
    .flashcard-back {
        padding: 1.2rem;
        font-size: 0.98rem;
    }

    .exam-paper-head,
    .exam-status-grid,
    .exam-brief-grid {
        gap: 0.7rem;
    }

    .exam-brief-card strong,
    .exam-status-card strong {
        font-size: 0.96rem;
    }

    .exam-option-card h3,
    .exam-type-card h3 {
        font-size: 0.94rem;
    }

    .exam-option-count,
    .exam-option-recommendation,
    .exam-brief-label,
    .exam-status-label,
    .roadmap-step-stage,
    .roadmap-step-chip,
    .coach-panel-label,
    .coach-card-label,
    .badge {
        font-size: 0.67rem;
    }

    .exam-flashcard-layout {
        gap: 0.8rem;
    }

    .exam-flashcard-card {
        min-height: 225px;
        padding: 0.95rem;
    }

    .exam-flashcard-surface {
        padding: 1.2rem;
    }

    .exam-flashcard-text {
        font-size: clamp(1.05rem, 1vw + 0.92rem, 1.45rem);
        line-height: 1.4;
    }

    .flashcard-exam-mode .exam-flashcard-answer-area .user-answer {
        min-height: 120px;
    }

    textarea,
    .user-answer,
    .quiz-steps {
        min-height: 120px;
    }
}

@media (max-width: 1024px) {
    #app-container,
    .app-header,
    footer {
        width: calc(100% - 1.25rem);
    }

    #app-container {
        padding: 0.7rem 0 1.5rem;
        gap: 0.9rem;
    }

    .app-header {
        padding: 0.7rem 0 0.4rem;
        gap: 0.7rem;
    }

    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: clamp(1.72rem, 3.2vw, 2.2rem);
    }

    .loader-container,
    .charm-container {
        min-height: 220px;
    }

    .selection-status,
    .action-row {
        gap: 0.65rem;
    }

    .subject-card,
    .time-card,
    .exam-type-card,
    .exam-option-card,
    .exam-brief-card,
    .exam-status-card {
        padding: 0.85rem;
    }

    .roadmap-step,
    .substep-card,
    .reference-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .modal-content,
    .drop-zone {
        padding: 0.9rem;
    }

    .substep-card {
        min-height: 230px;
    }

    .roadmap-flashcard-cue {
        padding: 0.85rem 0.9rem 0.95rem;
    }

    .roadmap-flashcard-front {
        font-size: 1rem;
    }

    .roadmap-flashcard-label {
        font-size: 0.71rem;
    }

    .roadmap-substep-progress {
        margin-bottom: 0.75rem;
    }

    .flashcard {
        height: 172px;
    }

    .flashcard-front,
    .flashcard-back {
        font-size: 0.92rem;
        padding: 1rem;
    }

    .exam-brief-grid,
    .exam-status-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .exam-options-grid,
    .exam-type-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: 1.58rem;
    }

    .view-description,
    .charm-message,
    .loading-subtext,
    .grading-hint,
    .coach-summary,
    .roadmap-step p,
    .reference-panel p,
    .reference-panel li,
    .modal-content p,
    .exam-option-card p,
    .exam-type-card p {
        font-size: 0.9rem;
        line-height: 1.48;
    }

    .loader-container,
    .charm-container {
        min-height: 180px;
    }

    .subject-card,
    .time-card,
    .exam-type-card,
    .exam-option-card,
    .exam-brief-card,
    .exam-status-card,
    .roadmap-step,
    .substep-card,
    .reference-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .modal-content,
    .drop-zone,
    .ai-feedback-box,
    .correct-answer-box {
        padding: 0.8rem;
    }

    button {
        padding: 0.72rem 0.95rem;
    }

    .step-circle {
        width: 40px;
        height: 40px;
        font-size: 0.82rem;
    }

    .exam-flashcard-card {
        min-height: 190px;
    }

    .exam-flashcard-surface {
        padding: 1rem;
    }

    .exam-flashcard-text {
        font-size: 1rem;
    }
}

/* Professional learning assistant refresh */
:root {
    --bg-color: #111b31;
    --card-bg: rgba(30, 41, 59, 0.94);
    --secondary-color: #182235;
    --text-color: #e5e7eb;
    --text-muted: #a8b6ca;
    --accent-color: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.12);
    --success-color: #16a34a;
    --error-color: #dc2626;
    --border-color: rgba(148, 163, 184, 0.28);
    --input-bg: rgba(30, 41, 59, 0.9);
    --gradient-color: #162133;
    --card-shadow: 0 12px 28px rgba(2, 8, 23, 0.18);
    --surface-soft: rgba(148, 163, 184, 0.09);
    --surface-strong: rgba(148, 163, 184, 0.14);
    --accent-soft: rgba(37, 99, 235, 0.12);
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.12);
    --flashcard-card-bg: linear-gradient(180deg, #111827 0%, #0f172a 100%);
    --flashcard-stack-layer-top: rgba(30, 41, 59, 0.9);
    --flashcard-stack-layer-mid: rgba(17, 24, 39, 0.96);
    --flashcard-chip-bg: rgba(37, 99, 235, 0.12);
    --flashcard-chip-color: #bfdbfe;
    --flashcard-chip-border: rgba(96, 165, 250, 0.2);
    --flashcard-chip-muted-bg: rgba(148, 163, 184, 0.08);
    --flashcard-chip-muted-color: #cbd5e1;
    --flashcard-chip-muted-border: rgba(148, 163, 184, 0.16);
    --flashcard-surface-bg: linear-gradient(180deg, rgba(17, 24, 39, 0.92) 0%, rgba(15, 23, 42, 0.98) 100%);
    --flashcard-surface-border: rgba(96, 165, 250, 0.18);
    --flashcard-text-color: #f8fafc;
    --flashcard-answer-input-bg: rgba(15, 23, 42, 0.94);
    --flashcard-answer-input-border: rgba(96, 165, 250, 0.16);
}

body.light-mode {
    --bg-color: #f5f7fb;
    --card-bg: #ffffff;
    --secondary-color: #ffffff;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --accent-color: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.1);
    --success-color: #15803d;
    --error-color: #b91c1c;
    --border-color: #dbe3ee;
    --input-bg: #ffffff;
    --gradient-color: #f5f7fb;
    --card-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
    --surface-soft: rgba(148, 163, 184, 0.08);
    --surface-strong: rgba(148, 163, 184, 0.12);
    --accent-soft: rgba(37, 99, 235, 0.06);
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.1);
    --flashcard-card-bg: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --flashcard-stack-layer-top: rgba(241, 245, 249, 0.98);
    --flashcard-stack-layer-mid: rgba(226, 232, 240, 0.98);
    --flashcard-chip-bg: rgba(37, 99, 235, 0.08);
    --flashcard-chip-color: #1d4ed8;
    --flashcard-chip-border: rgba(59, 130, 246, 0.14);
    --flashcard-chip-muted-bg: rgba(148, 163, 184, 0.1);
    --flashcard-chip-muted-color: #475569;
    --flashcard-chip-muted-border: rgba(148, 163, 184, 0.16);
    --flashcard-surface-bg: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --flashcard-surface-border: rgba(37, 99, 235, 0.16);
    --flashcard-text-color: #0f172a;
    --flashcard-answer-input-bg: #ffffff;
    --flashcard-answer-input-border: rgba(59, 130, 246, 0.14);
}

body {
    background: var(--bg-color);
    color: var(--text-color);
}

.app-header {
    max-width: 1040px;
    padding: 1rem 0 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

#app-container {
    max-width: 1040px;
    padding: 1.2rem 0 2rem;
    gap: 1.2rem;
}

.view-section {
    align-items: stretch;
    text-align: left;
    gap: 1rem;
}

#landing-view,
#loading-view,
#pre-quiz-view,
#pre-studyPlan-view,
#pre-studyPlan-2-view {
    align-items: center;
    text-align: center;
}

.view-title,
#roadmap-step-view #step-study-title,
#results-view h1 {
    font-size: clamp(1.95rem, 3vw, 2.65rem);
    line-height: 1.12;
    letter-spacing: -0.03em;
    border-bottom: none;
    padding-bottom: 0;
}

.view-description,
.charm-message,
.loading-subtext,
.grading-hint,
.coach-summary,
.roadmap-step p,
.reference-panel p,
.reference-panel li,
.modal-content p,
.exam-option-card p,
.exam-type-card p {
    font-size: 0.96rem;
    line-height: 1.58;
    color: var(--text-muted);
}

.quiz-intro,
.exam-flashcard-stage,
.roadmap-step-stage,
.roadmap-step-chip,
.coach-panel-label,
.coach-card-label,
.exam-brief-label,
.exam-status-label,
.exam-option-recommendation,
.badge {
    color: var(--text-muted);
    background: transparent;
    border: none;
    padding: 0;
    letter-spacing: 0.08em;
}

.loader-container,
.charm-container {
    min-height: 240px;
}

.logo {
    color: var(--text-color);
    font-size: 1.08rem;
    letter-spacing: -0.03em;
}

.logo:hover {
    color: var(--accent-color);
    filter: none;
}

.header-actions {
    gap: 0.6rem;
}

.theme-toggle,
.ai-status,
.status-chip {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-muted);
    box-shadow: none;
}

.theme-toggle:hover,
.status-chip:hover,
.secondary-btn:hover,
.file-upload-btn:hover,
.subject-card:hover,
.time-card:hover,
.exam-type-card:hover,
.exam-option-card:hover,
.roadmap-step:hover {
    background: var(--surface-soft);
    border-color: rgba(37, 99, 235, 0.2);
    color: var(--text-color);
    transform: none;
    box-shadow: none;
}

.ai-status {
    display: none;
}

.status-dot {
    animation: none;
    box-shadow: none;
}

.progress-bar {
    height: 3px;
    background: var(--accent-color);
    box-shadow: none;
}

button,
.primary-btn,
.magical-btn,
.secondary-btn,
.file-upload-btn,
.subject-card,
.time-card {
    border-radius: 10px;
    font-size: 0.94rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    box-shadow: none;
}

button {
    padding: 0.82rem 1.05rem;
}

.primary-btn,
.magical-btn,
#start-btn,
#submit-answer-btn,
#submit-exam-btn,
#substep-next-btn,
#find-weak-points-btn,
#make-plan-btn,
#retake-diff-btn {
    background: var(--accent-color);
    border: 1px solid rgba(37, 99, 235, 0.18);
    color: #ffffff;
    box-shadow: none;
}

.primary-btn:hover,
.magical-btn:hover,
#start-btn:hover,
#submit-answer-btn:hover,
#submit-exam-btn:hover,
#substep-next-btn:hover,
#find-weak-points-btn:hover,
#make-plan-btn:hover,
#retake-diff-btn:hover {
    background: #1d4ed8;
    color: #ffffff;
    box-shadow: none;
    transform: none;
}

.secondary-btn,
.file-upload-btn,
.subject-card,
.time-card,
.text-action-btn,
.exam-type-card,
.exam-option-card {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

#landing-resume-panel {
    background: transparent;
}

.drop-zone,
.roadmap-step,
.substep-card,
.modal-content,
.ai-feedback-box,
.correct-answer-box,
.coach-panel,
.exam-paper-shell,
.exam-brief-card,
.exam-status-card,
.exam-brief-panel,
.exam-question-shell,
.subject-card,
.time-card,
.exam-type-card,
.exam-option-card {
    background: var(--secondary-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

textarea,
input[type="text"],
.quiz-formula,
.quiz-steps,
.quiz-result,
.quiz-unit,
.user-answer {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    box-shadow: none;
}

textarea:focus,
input[type="text"]:focus,
.quiz-formula:focus,
.quiz-steps:focus,
.quiz-result:focus,
.quiz-unit:focus,
.user-answer:focus,
button:focus-visible,
.status-chip:focus-visible,
.logo:focus-visible,
.roadmap-step:focus-visible,
.text-action-btn:focus-visible {
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: var(--focus-ring);
}

.selection-status,
.action-row,
.subject-grid,
.time-grid,
.exam-brief-grid,
.exam-status-grid,
.exam-type-grid,
.exam-options-grid,
.coach-grid,
.roadmap-path {
    gap: 0.8rem;
}

.subject-card,
.time-card,
.exam-type-card,
.exam-option-card {
    padding: 0.95rem;
    text-align: left;
}

.subject-card {
    align-items: flex-start;
}

.subject-card .subject-icon {
    font-size: 1.4rem;
}

.roadmap-step {
    padding: 1rem;
    gap: 0.8rem;
}

.first-step,
.mastered-step {
    background: var(--secondary-color);
    box-shadow: var(--card-shadow);
}

.first-step {
    border-color: rgba(37, 99, 235, 0.24);
}

.mastered-step {
    border-color: rgba(21, 128, 61, 0.22);
}

.step-circle {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--accent-soft);
    border: 1px solid rgba(37, 99, 235, 0.18);
    color: var(--accent-color);
}

.dot {
    width: 20px;
    height: 4px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.22);
}

.dot.active,
.topic-bar-fill {
    background: var(--accent-color);
    box-shadow: none;
}

.dot.done {
    background: var(--success-color);
}

.flashcard-front {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
}

.flashcard-back {
    background: #dbeafe;
    color: #0f172a;
}

body:not(.light-mode) .flashcard-back {
    background: #1e3a8a;
    color: #eff6ff;
}

.coach-panel {
    background: var(--secondary-color);
    border-left: 3px solid var(--accent-color);
}

.coach-card {
    background: var(--surface-soft);
    border-radius: 10px;
}

.coach-topic-list li,
.coach-signal-list li {
    border-bottom-color: var(--border-color);
}

.exam-option-card,
.exam-type-card,
.exam-paper-shell,
.exam-question-shell,
.exam-rules-panel {
    background: var(--secondary-color);
}

.exam-type-card,
.exam-option-card {
    position: relative;
    border-color: var(--border-color);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

.exam-type-card.selected,
.exam-option-card.selected,
.exam-option-card.recommended {
    border-color: rgba(37, 99, 235, 0.42);
    background: rgba(37, 99, 235, 0.1);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.34),
        0 0 0 1px rgba(37, 99, 235, 0.14),
        0 12px 28px rgba(37, 99, 235, 0.08);
}

.exam-type-card.selected::after,
.exam-option-card.selected::after {
    content: '\2713';
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    width: 1.5rem;
    height: 1.5rem;
    display: grid;
    place-items: center;
    border-radius: 999px;
    background: var(--accent-color);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 800;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.18);
}

.exam-option-card h3,
.exam-type-card h3,
.exam-brief-card strong,
.exam-status-card strong {
    color: var(--text-color);
}

.exam-paper-head {
    border-bottom: 1px solid var(--border-color);
}

.exam-status-card {
    background: var(--surface-soft);
}

.flashcard-exam-mode .exam-question-shell {
    background: transparent;
}

.exam-flashcard-stack::before {
    transform: translateY(8px);
}

.exam-flashcard-stack::after {
    transform: translateY(4px);
}

.exam-flashcard-card {
    border-radius: 18px;
}

.exam-flashcard-surface {
    border-radius: 14px;
}

.exam-flashcard-answer-area .textarea-wrapper,
.flashcard-exam-mode .exam-flashcard-answer-area .ui-component-options,
.flashcard-exam-mode .exam-flashcard-answer-area .ui-component-exact,
.flashcard-exam-mode .exam-flashcard-answer-area .symbol-tray {
    border-radius: 12px;
}

.ai-feedback-box,
.correct-answer-box {
    border-left-width: 3px;
}

.modal-content {
    border-width: 1px;
}

body .option-correct {
    background: var(--success-color) !important;
    color: #ffffff !important;
}

body .option-incorrect {
    background: var(--error-color) !important;
    color: #ffffff !important;
}

@media (max-width: 900px) {
    .view-section {
        gap: 0.9rem;
    }

    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: 1.8rem;
    }

    .subject-card,
    .time-card,
    .exam-type-card,
    .exam-option-card,
    .roadmap-step,
    .substep-card,
    .reference-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell {
        padding: 0.9rem;
    }
}

@media (max-width: 700px) {
    .app-header {
        border-bottom: none;
    }

    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: 1.58rem;
    }

    .view-description,
    .charm-message,
    .loading-subtext,
    .grading-hint,
    .coach-summary,
    .roadmap-step p,
    .reference-panel p,
    .reference-panel li,
    .modal-content p,
    .exam-option-card p,
    .exam-type-card p {
        font-size: 0.9rem;
    }

}

@media (max-width: 390px) {
    .subject-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.5rem;
    }

    .subject-card {
        padding: 0.7rem;
        gap: 0.4rem;
        font-size: 0.82rem;
        line-height: 1.22;
    }

    .subject-card .subject-icon {
        font-size: 1.05rem;
    }

    .subject-card small {
        font-size: 0.66rem;
        line-height: 1.2;
    }
}

/* Collapsible reference panels */
.reference-toggle-link {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0;
    margin: 0 0 0.7rem;
    border: 0;
    background: none;
    color: var(--accent-color);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.4;
    text-align: left;
    box-shadow: none;
}

.reference-toggle-link::after {
    content: '▾';
    flex-shrink: 0;
    font-size: 0.85rem;
    transition: transform 0.2s ease;
}

.reference-toggle-link[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.reference-toggle-link:hover,
.reference-toggle-link:active {
    background: none;
    color: var(--accent-color);
    transform: none;
    box-shadow: none;
    filter: none;
}

.reference-toggle-link:hover {
    text-decoration: underline;
    text-underline-offset: 0.16em;
}

.reference-toggle-link:focus-visible {
    outline: 3px solid rgba(90, 169, 230, 0.28);
    outline-offset: 4px;
    border-radius: 8px;
}

.reference-toggle-link.hidden {
    display: none !important;
}

.reference-panel.reference-panel-collapsed {
    display: none !important;
}

@keyframes preExamTypeGlow {
    0% {
        box-shadow:
            0 12px 28px rgba(37, 99, 235, 0.24),
            -26px 0 44px rgba(59, 130, 246, 0.26),
            22px 0 40px rgba(16, 185, 129, 0.18);
    }
    35% {
        box-shadow:
            0 16px 34px rgba(37, 99, 235, 0.3),
            -10px 0 38px rgba(59, 130, 246, 0.34),
            34px 0 52px rgba(16, 185, 129, 0.24);
    }
    70% {
        box-shadow:
            0 16px 34px rgba(37, 99, 235, 0.3),
            -34px 0 52px rgba(59, 130, 246, 0.24),
            10px 0 38px rgba(16, 185, 129, 0.34);
    }
    100% {
        box-shadow:
            0 12px 28px rgba(37, 99, 235, 0.24),
            -26px 0 44px rgba(59, 130, 246, 0.26),
            22px 0 40px rgba(16, 185, 129, 0.18);
    }
}

@keyframes preExamTypeSheen {
    0%,
    15% {
        transform: translateX(-165%) skewX(-22deg);
        opacity: 0;
    }
    30% {
        opacity: 0.56;
    }
    55% {
        transform: translateX(165%) skewX(-22deg);
        opacity: 0;
    }
    100% {
        transform: translateX(165%) skewX(-22deg);
        opacity: 0;
    }
}

.reference-toggle-button {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    margin: 0 0 0.85rem;
    padding: 0.88rem 1.15rem;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 12px;
    background: var(--accent-color);
    color: #ffffff;
    font-size: 0.96rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    box-shadow: none;
}

.reference-toggle-button::after {
    content: '→';
    font-size: 0.95rem;
    transition: transform 0.2s ease;
}

.reference-toggle-button[aria-expanded="true"]::after {
    transform: rotate(90deg);
}

.reference-toggle-button:hover,
.reference-toggle-button:active {
    background: #1d4ed8;
    color: #ffffff;
    box-shadow: none;
    filter: none;
}

.reference-toggle-button:focus-visible {
    outline: 3px solid rgba(90, 169, 230, 0.28);
    outline-offset: 4px;
}

button[data-reference-toggle-for="pre-exam-type-panel"]:not([aria-expanded="true"]),
#pre-exam-open-difficulty-btn:not(.hidden):not([aria-expanded="true"]) {
    position: relative;
    overflow: hidden;
    border-color: rgba(37, 99, 235, 0.24);
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 55%, #0f9a6c 100%);
    box-shadow:
        0 12px 28px rgba(37, 99, 235, 0.24),
        -26px 0 44px rgba(59, 130, 246, 0.26),
        22px 0 40px rgba(16, 185, 129, 0.18);
    animation: preExamTypeGlow 4s ease-in-out infinite;
}

button[data-reference-toggle-for="pre-exam-type-panel"]:not([aria-expanded="true"])::before,
#pre-exam-open-difficulty-btn:not(.hidden):not([aria-expanded="true"])::before {
    content: '';
    position: absolute;
    inset: -10% auto -10% -30%;
    width: 38%;
    background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.34) 50%, transparent 100%);
    transform: translateX(-165%) skewX(-22deg);
    opacity: 0;
    pointer-events: none;
    animation: preExamTypeSheen 3.2s ease-in-out infinite;
}

button[data-reference-toggle-for="pre-exam-type-panel"]:not([aria-expanded="true"]):hover,
button[data-reference-toggle-for="pre-exam-type-panel"]:not([aria-expanded="true"]):active,
#pre-exam-open-difficulty-btn:not(.hidden):not([aria-expanded="true"]):hover,
#pre-exam-open-difficulty-btn:not(.hidden):not([aria-expanded="true"]):active {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 55%, #0f8a61 100%);
    box-shadow:
        0 18px 36px rgba(37, 99, 235, 0.28),
        -14px 0 42px rgba(59, 130, 246, 0.32),
        30px 0 52px rgba(16, 185, 129, 0.22);
    filter: none;
}

button[data-reference-toggle-for="pre-exam-type-panel"][aria-expanded="true"] {
    background: var(--accent-color);
    border-color: rgba(37, 99, 235, 0.18);
    box-shadow: none;
    animation: none;
}

button[data-reference-toggle-for="pre-exam-type-panel"][aria-expanded="true"]::before {
    content: none;
    animation: none;
}

button[data-reference-toggle-for="pre-exam-type-panel"][aria-expanded="true"]:hover,
button[data-reference-toggle-for="pre-exam-type-panel"][aria-expanded="true"]:active {
    background: #1d4ed8;
    box-shadow: none;
}

#pre-exam-open-difficulty-btn[aria-expanded="true"] {
    background: #1d4ed8;
    border-color: rgba(47, 159, 106, 0.22);
    box-shadow: none;
    animation: none;
}

#pre-exam-open-difficulty-btn[aria-expanded="true"]::before {
    content: none;
    animation: none;
}

.pre-exam-panel-action {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
}

.pre-exam-panel-action .primary-btn {
    margin: 0;
}

.goal-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    width: 100%;
}

.goal-card {
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0.65rem;
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-color);
    text-align: left;
}

.goal-card:hover,
.goal-card.selected {
    border-color: rgba(37, 99, 235, 0.42);
    background: var(--secondary-color);
    transform: translateY(-1px);
}

.goal-card-label {
    display: block;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-color);
}

.goal-card span:last-child {
    color: var(--text-muted);
    font-size: 0.94rem;
    line-height: 1.5;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    width: 100%;
}

.summary-panel {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    padding: 1.15rem;
}

.summary-panel h2 {
    margin: 0 0 0.75rem;
    font-size: 1.05rem;
}

.summary-panel ul {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--text-muted);
    line-height: 1.58;
}

.summary-panel li + li {
    margin-top: 0.45rem;
}

@media (max-width: 640px) {
    .goal-grid,
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .goal-card {
        min-height: auto;
    }

    .app-header {
        width: min(94%, 800px);
        padding: 0.75rem 1rem;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: start;
        gap: 0.65rem;
    }

    .logo {
        min-width: 0;
        font-size: clamp(0.96rem, 4vw, 1.08rem);
        line-height: 1.1;
    }

    .header-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, max-content));
        justify-content: end;
        align-items: start;
        gap: 0.45rem;
        min-width: 0;
    }

    .theme-toggle {
        min-height: 34px;
        min-width: 34px;
        padding: 0.42rem 0.56rem;
        border-radius: 12px;
        font-size: 0.84rem;
    }

    #language-toggle {
        padding-inline: 0.58rem;
    }

    #language-toggle-label {
        font-size: 0.74rem;
        line-height: 1;
        white-space: nowrap;
    }
}

@media (max-width: 380px) {
    .app-header {
        padding-inline: 0.8rem;
    }

    .theme-toggle {
        min-height: 32px;
        min-width: 32px;
        padding: 0.38rem 0.48rem;
    }

    #language-toggle-label {
        font-size: 0.7rem;
    }
}

/* Professional loading experience */
#loading-view {
    width: 100%;
    min-height: clamp(420px, calc(100vh - 10rem), 760px);
    display: flex;
    align-items: center;
    justify-content: center;
}

#loading-view .loader-container {
    width: min(100%, 460px);
    min-height: clamp(320px, 56vh, 520px);
    margin: 0 auto;
    padding: clamp(1.4rem, 2vw, 2rem);
    gap: 1rem;
    justify-content: center;
    align-items: center;
    position: relative;
    isolation: isolate;
}

#loading-view .loader-container::before {
    content: none;
}

.ai-analysis-loader {
    width: 88px;
    aspect-ratio: 1;
    margin-bottom: 1.35rem;
    position: relative;
    isolation: isolate;
    border-radius: 26px;
    animation: aiLoaderFloat 5.8s cubic-bezier(0.37, 0, 0.2, 1) infinite;
}

.ai-analysis-loader::before {
    content: '';
    position: absolute;
    inset: -20px;
    z-index: -1;
    border-radius: 34px;
    background:
        radial-gradient(circle at 34% 34%, rgba(64, 134, 245, 0.72), transparent 34%),
        radial-gradient(circle at 68% 66%, rgba(35, 198, 146, 0.62), transparent 35%);
    filter: blur(18px) saturate(1.18);
    opacity: 0.94;
    animation: aiLoaderAura 7.2s cubic-bezier(0.37, 0, 0.2, 1) infinite;
}

.ai-analysis-loader::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background:
        radial-gradient(circle at 24% 18%, rgba(255, 255, 255, 0.82), transparent 24%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0.12) 52%, rgba(231, 242, 255, 0.2));
    border: 1px solid rgba(156, 199, 255, 0.44);
    box-shadow:
        0 18px 48px rgba(25, 43, 73, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.74),
        inset 0 -18px 30px rgba(67, 135, 240, 0.08);
    backdrop-filter: blur(18px) saturate(1.35);
    -webkit-backdrop-filter: blur(18px) saturate(1.35);
}

.ai-loader-glass {
    position: absolute;
    inset: 8px;
    z-index: 1;
    overflow: hidden;
    border-radius: 20px;
    background:
        radial-gradient(circle at 28% 20%, rgba(255, 255, 255, 0.58), transparent 25%),
        radial-gradient(circle at 72% 78%, rgba(121, 204, 238, 0.14), transparent 35%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.04));
    border: 1px solid rgba(255, 255, 255, 0.34);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.44);
}

.ai-loader-glass::before {
    content: '';
    position: absolute;
    inset: -70% -95%;
    background: linear-gradient(115deg, transparent 37%, rgba(255, 255, 255, 0.42) 48%, transparent 59%);
    transform: translateX(-24%) rotate(8deg);
    animation: aiLoaderSheen 4.4s cubic-bezier(0.37, 0, 0.2, 1) infinite;
}

.ai-loader-glass::after {
    content: '';
    position: absolute;
    inset: 28%;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.26);
    box-shadow:
        -13px -12px 0 -7px rgba(255, 255, 255, 0.44),
        14px 12px 0 -7px rgba(255, 255, 255, 0.24);
    animation: aiLoaderBreath 2.8s ease-in-out infinite;
}

.loading-text {
    font-size: clamp(1.3rem, 2vw, 1.7rem);
    margin-bottom: 0.15rem;
}

.loading-subtext {
    max-width: 30rem;
    margin: 0;
    font-style: normal;
    font-size: 0.98rem;
    line-height: 1.6;
}

@keyframes aiLoaderFloat {
    0%, 100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(0, -5px, 0) scale(1.02);
    }
}

@keyframes aiLoaderAura {
    0%, 100% {
        transform: translate3d(-2px, 0, 0) scale(0.98);
        opacity: 0.82;
    }
    50% {
        transform: translate3d(3px, -4px, 0) scale(1.04);
        opacity: 1;
    }
}

@keyframes aiLoaderSheen {
    0%, 42% {
        transform: translateX(-28%) rotate(8deg);
        opacity: 0;
    }
    58% {
        opacity: 0.95;
    }
    100% {
        transform: translateX(28%) rotate(8deg);
        opacity: 0;
    }
}

@keyframes aiLoaderBreath {
    0%, 100% {
        transform: scale(0.94);
        opacity: 0.62;
    }
    50% {
        transform: scale(1.06);
        opacity: 0.9;
    }
}

@keyframes landingAuraShift {
    0% {
        transform: translate3d(-3px, 0, 0) scale(0.985);
        opacity: 0.8;
    }
    26% {
        transform: translate3d(4px, -6px, 0) scale(1.02);
        opacity: 0.94;
    }
    54% {
        transform: translate3d(0, -10px, 0) scale(1.05);
        opacity: 1;
    }
    78% {
        transform: translate3d(-5px, -4px, 0) scale(1.015);
        opacity: 0.9;
    }
    100% {
        transform: translate3d(-3px, 0, 0) scale(0.985);
        opacity: 0.8;
    }
}

@media (max-width: 700px) {
    #loading-view {
        min-height: clamp(360px, calc(100vh - 8.5rem), 640px);
    }

    #loading-view .loader-container {
        min-height: clamp(280px, 50vh, 420px);
        padding: 1rem;
    }

    .ai-analysis-loader {
        width: 74px;
        margin-bottom: 1rem;
    }

    .ai-loader-glass {
        inset: 7px;
        border-radius: 17px;
    }
}

@media (max-width: 420px) {
    #loading-view {
        min-height: clamp(320px, calc(100vh - 7.5rem), 560px);
    }

    #loading-view .loader-container {
        min-height: clamp(240px, 46vh, 360px);
        gap: 0.8rem;
        padding: 0.8rem;
    }

    .ai-analysis-loader {
        width: 66px;
    }

    .loading-text {
        font-size: 1.15rem;
    }

    .loading-subtext {
        font-size: 0.9rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ai-analysis-loader,
    .ai-analysis-loader::before,
    .ai-loader-glass::before,
    .ai-loader-glass::after {
        animation: none;
    }
}

/* Symbol tray packing */
.symbol-tray {
    display: flex !important;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 0.28rem !important;
    width: 100%;
    margin-bottom: 0.5rem;
    padding: 0.38rem !important;
    border-radius: 10px !important;
    overflow: hidden;
}

.symbol-tray > .text-action-btn {
    flex: 0 0 auto;
    width: auto !important;
    min-width: 1.8rem;
    margin: 0 !important;
    padding: 0.16rem 0.42rem !important;
    border-radius: 8px;
    font-size: 0.82rem;
    line-height: 1;
    letter-spacing: 0;
    white-space: nowrap;
}

@media (max-width: 700px) {
    .symbol-tray {
        gap: 0.22rem !important;
        padding: 0.28rem !important;
    }

    .symbol-tray > .text-action-btn {
        min-width: 1.55rem;
        padding: 0.12rem 0.32rem !important;
        font-size: 0.72rem;
        border-radius: 7px;
    }
}

/* Light-mode exam surface cleanup */
body.light-mode .exam-paper-shell,
body.light-mode .exam-question-shell,
body.light-mode .exam-rules-panel,
body.light-mode .exam-status-card,
body.light-mode .exam-flashcard-card,
body.light-mode .exam-flashcard-surface,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .symbol-tray,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .ui-component-options,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .ui-component-exact,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .textarea-wrapper {
    background: #ffffff;
}

body.light-mode .exam-paper-shell,
body.light-mode .exam-rules-panel,
body.light-mode .exam-status-card,
body.light-mode .exam-flashcard-card,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .symbol-tray,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .ui-component-options,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .ui-component-exact,
body.light-mode .flashcard-exam-mode .exam-flashcard-answer-area .textarea-wrapper {
    border-color: rgba(148, 163, 184, 0.34);
}

body.light-mode .exam-question-shell {
    border-color: rgba(148, 163, 184, 0.4);
}

body.light-mode .exam-paper-head {
    border-bottom-color: rgba(148, 163, 184, 0.34);
}

body.light-mode .exam-flashcard-surface {
    border-color: rgba(148, 163, 184, 0.34);
}

body.light-mode .exam-flashcard-stack::before,
body.light-mode .exam-flashcard-stack::after {
    background: #ffffff;
    border-color: rgba(148, 163, 184, 0.3);
}

/* Landing page premium showcase */
#landing-view {
    width: 100%;
}

#landing-start-btn {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 55%, #0f9a6c 100%);
    border-color: rgba(37, 99, 235, 0.24);
    box-shadow:
        0 12px 28px rgba(37, 99, 235, 0.24),
        -26px 0 44px rgba(59, 130, 246, 0.26),
        22px 0 40px rgba(16, 185, 129, 0.18);
    animation: preExamTypeGlow 4s ease-in-out infinite;
}

#landing-start-btn::before {
    content: '';
    position: absolute;
    inset: -10% auto -10% -30%;
    width: 38%;
    background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.34) 50%, transparent 100%);
    transform: translateX(-165%) skewX(-22deg);
    opacity: 0;
    pointer-events: none;
    animation: preExamTypeSheen 3.2s ease-in-out infinite;
}

#landing-start-btn:hover,
#landing-start-btn:active {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 55%, #0f8a61 100%);
    box-shadow:
        0 18px 36px rgba(37, 99, 235, 0.28),
        -14px 0 42px rgba(59, 130, 246, 0.32),
        30px 0 52px rgba(16, 185, 129, 0.22);
    transform: none;
}

#landing-hero {
    width: 100%;
    min-height: clamp(260px, 30vw, 420px);
    margin-top: 0.45rem;
    overflow: hidden;
    position: absolute;
    bottom: 0px;
    filter: blur(200px);
    z-index: -1;
}

.landing-square-cloud {
    width: 100%;
    min-height: inherit;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: clamp(0.85rem, 1.8vw, 1.25rem);
    padding: clamp(1.2rem, 3vw, 2rem);
    position: relative;
    background: transparent;
    isolation: isolate;
}

.landing-square-cloud::before {
    content: '';
    position: absolute;
    inset: 10% 8%;
    border-radius: 36px;
    z-index: -1;
    background:
        radial-gradient(circle at 36% 26%, rgba(59, 130, 246, 0.26), transparent 34%),
        radial-gradient(circle at 64% 72%, rgba(16, 185, 129, 0.24), transparent 34%);
    filter: blur(70px);
    opacity: 0.96;
    animation: landingAuraShift 8.4s cubic-bezier(0.37, 0, 0.2, 1) infinite;
}

.landing-square {
    display: block;
    width: 500px;
    height: 500px;
    border-radius: 24px;
    filter: blur(6px);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.08),
        0 18px 38px rgba(15, 23, 42, 0.18);
}

.landing-square-blue {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.94), rgba(37, 99, 235, 0.88));
    box-shadow:
        0 0 0 1px rgba(96, 165, 250, 0.14),
        0 0 36px rgba(59, 130, 246, 0.34),
        0 20px 40px rgba(37, 99, 235, 0.18);
}

.landing-square-green {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.94), rgba(16, 185, 129, 0.88));
    box-shadow:
        0 0 0 1px rgba(74, 222, 128, 0.14),
        0 0 36px rgba(16, 185, 129, 0.32),
        0 20px 40px rgba(16, 185, 129, 0.16);
}

.landing-square:nth-child(1) { animation: landingSquareBob 3.2s ease-in-out infinite; }
.landing-square:nth-child(2) { animation: landingSquareBob 3.2s ease-in-out 0.28s infinite; }
.landing-square:nth-child(3) { animation: landingSquareBob 3.2s ease-in-out 0.56s infinite; }
.landing-square:nth-child(4) { animation: landingSquareBob 3.2s ease-in-out 0.84s infinite; }
.landing-square:nth-child(5) { animation: landingSquareBob 3.2s ease-in-out 1.12s infinite; }

@keyframes landingSquareBob {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-100px);
    }
}

@media (max-width: 980px) {
    #landing-hero {
        display: none;
    }
}

/* Final landing squares override */
#landing-hero {
    overflow: visible !important;
}

.landing-square-cloud {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    backdrop-filter: blur(34px) !important;
    -webkit-backdrop-filter: blur(34px) !important;
}

.landing-square-cloud::before,
.landing-square-cloud::after {
    border: none !important;
}

.landing-square {
    filter: blur(8px) !important;
    -webkit-filter: blur(8px) !important;
}

/* Image cropper */
.file-list-name {
    min-width: 0;
    flex: 1;
}

.file-list-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
    margin-left: 0.6rem;
}

.crop-file-btn {
    width: auto;
    margin: 0;
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    border: 1px solid rgba(90, 169, 230, 0.28);
    background: rgba(90, 169, 230, 0.1);
    color: var(--accent-color);
    box-shadow: none;
    font-size: 0.75rem;
    line-height: 1;
}

.crop-file-btn:hover {
    background: rgba(90, 169, 230, 0.18);
    box-shadow: none;
}

.modal-content.crop-modal {
    width: min(94vw, 860px);
    max-width: 860px;
    padding: clamp(1rem, 3vw, 2rem);
}

.crop-modal-shell {
    display: grid;
    justify-items: center;
    gap: 1rem;
    width: 100%;
}

.crop-image-frame {
    position: relative;
    display: inline-block;
    max-width: 100%;
    max-height: min(68vh, 620px);
    overflow: hidden;
    border-radius: 8px;
    background: rgba(2, 8, 23, 0.74);
    line-height: 0;
}

.crop-image-preview {
    display: block;
    max-width: 100%;
    max-height: min(68vh, 620px);
    width: auto;
    height: auto;
    user-select: none;
    pointer-events: none;
}

.crop-box {
    position: absolute;
    border: 2px solid #f8fbff;
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.45);
    cursor: move;
    touch-action: none;
    min-width: 32px;
    min-height: 32px;
}

.crop-box::before {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: 0 0 0 9999px rgba(2, 8, 23, 0.5);
    pointer-events: none;
}

.crop-handle {
    position: absolute;
    z-index: 1;
    width: 18px;
    height: 18px;
    border: 2px solid #f8fbff;
    border-radius: 999px;
    background: var(--accent-color);
    box-shadow: 0 4px 12px rgba(2, 8, 23, 0.24);
}

.crop-handle-nw {
    top: -10px;
    left: -10px;
    cursor: nwse-resize;
}

.crop-handle-ne {
    top: -10px;
    right: -10px;
    cursor: nesw-resize;
}

.crop-handle-sw {
    bottom: -10px;
    left: -10px;
    cursor: nesw-resize;
}

.crop-handle-se {
    right: -10px;
    bottom: -10px;
    cursor: nwse-resize;
}

.crop-action-row {
    margin-top: 0;
}

.material-limit-body {
    display: grid;
    gap: 0.9rem;
    width: 100%;
    text-align: left;
}

.material-limit-body p {
    font-size: 0.98rem;
}

@media (max-width: 640px) {
    .file-list li {
        align-items: flex-start;
        gap: 0.65rem;
    }

    .file-list-actions {
        margin-left: 0;
    }

    .modal-content.crop-modal {
        min-width: calc(100vw - 1rem);
    }
}

/* Final Modal Responsiveness Overrides */
.modal-overlay {
    padding: clamp(0.75rem, 2vw, 1.25rem);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.modal-content {
    width: min(50rem, calc(100vw - 2rem));
    max-height: calc(100dvh - 2rem);
    overflow: hidden;
}

.modal-content.modal-has-form,
.modal-content.crop-modal {
    max-height: calc(100dvh - 1.5rem);
}

.modal-body,
.modal-content.modal-has-form .modal-body {
    min-height: 0;
    overflow: auto;
}

.modal-content .action-row {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.modal-content .action-row > * {
    min-width: 0;
}

@media (max-width: 900px) {
    .modal-content {
        width: min(42rem, calc(100vw - 1.5rem));
        padding: 2rem 1.6rem;
        border-radius: 20px;
        gap: 1.1rem;
    }

    .modal-content p {
        font-size: 1.08rem;
        line-height: 1.52;
    }

    .modal-form {
        gap: 0.85rem;
    }

    .modal-fieldset {
        padding: 0.75rem 0.85rem 0.9rem;
    }

    .modal-choice-grid {
        gap: 0.55rem;
    }

    .modal-choice-btn {
        min-height: 2.7rem;
        padding: 0.62rem 0.65rem;
        font-size: 0.88rem;
    }

    .modal-choice-btn span {
        font-size: 0.69rem;
    }

    .modal-textarea,
    .modal-select {
        padding: 0.78rem 0.82rem;
        border-radius: 11px;
    }

    .modal-textarea {
        min-height: 112px;
    }

    .modal-content.crop-modal {
        width: min(46rem, calc(100vw - 1.25rem));
    }
}

@media (max-width: 640px), (max-height: 820px) {
    .modal-overlay {
        align-items: flex-start;
        padding: 0.65rem;
    }

    .modal-content {
        width: calc(100vw - 1.3rem);
        max-height: calc(100dvh - 1.3rem);
        min-width: 0;
        padding: 1.25rem 1rem;
        border-radius: 18px;
        gap: 0.9rem;
    }

    .modal-content p {
        font-size: 0.98rem;
        line-height: 1.45;
    }

    .modal-body {
        padding-right: 0.1rem;
    }

    .modal-field {
        gap: 0.35rem;
    }

    .modal-field label,
    .modal-field legend {
        font-size: 0.8rem;
    }

    .modal-fieldset {
        border-radius: 12px;
        padding: 0.65rem 0.75rem 0.8rem;
    }

    .modal-form {
        gap: 0.75rem;
    }

    .modal-choice-grid {
        grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
        gap: 0.48rem;
    }

    .modal-choice-btn {
        min-height: 2.45rem;
        padding: 0.5rem 0.52rem;
        font-size: 0.8rem;
        border-radius: 10px;
    }

    .modal-choice-btn span {
        font-size: 0.63rem;
        margin-top: 0.08rem;
    }

    .modal-textarea,
    .modal-select {
        font-size: 0.92rem;
        padding: 0.72rem 0.75rem;
    }

    .modal-textarea {
        min-height: 96px;
    }

    .modal-helper {
        font-size: 0.74rem;
        line-height: 1.4;
    }

    .modal-content .action-row {
        gap: 0.55rem;
    }

    .modal-content .action-row button,
    .modal-content .action-row .primary-btn,
    .modal-content .action-row .secondary-btn {
        width: 100%;
        min-height: 2.8rem;
        padding: 0.72rem 0.9rem;
        font-size: 0.92rem;
    }

    .modal-content.crop-modal {
        width: calc(100vw - 1rem);
    }
}

@media (max-width: 420px), (max-height: 700px) {
    .modal-overlay {
        padding: 0.45rem;
    }

    .modal-content {
        width: calc(100vw - 0.9rem);
        max-height: calc(100dvh - 0.9rem);
        padding: 1rem 0.8rem;
        border-radius: 16px;
        gap: 0.78rem;
    }

    .modal-content p {
        font-size: 0.92rem;
    }

    .modal-field label,
    .modal-field legend {
        font-size: 0.76rem;
    }

    .modal-choice-grid {
        grid-template-columns: repeat(auto-fit, minmax(64px, 1fr));
    }

    .modal-choice-btn {
        min-height: 2.2rem;
        padding: 0.42rem 0.45rem;
        font-size: 0.76rem;
    }

    .modal-choice-btn span {
        font-size: 0.58rem;
    }

    .modal-textarea,
    .modal-select {
        font-size: 0.88rem;
        padding: 0.64rem 0.68rem;
    }

    .modal-textarea {
        min-height: 82px;
    }

    .modal-helper {
        font-size: 0.69rem;
    }

    .material-limit-body p {
        font-size: 0.9rem;
    }
}

/* Study Desk UI Refresh */
:root {
    --desk-bg: #f6f8fc;
    --desk-bg-line: rgba(32, 55, 86, 0.055);
    --desk-surface: #ffffff;
    --desk-surface-soft: #f9fbfe;
    --desk-surface-strong: #eef3f9;
    --desk-ink: #142033;
    --desk-muted: #5b6d82;
    --desk-border: #d8e2ee;
    --desk-border-strong: #b8c7da;
    --desk-blue: #2563eb;
    --desk-blue-soft: #e8f0ff;
    --desk-green: #15936c;
    --desk-green-soft: #e7f7f1;
    --desk-amber: #b7791f;
    --desk-amber-soft: #fff4d8;
    --desk-red: #c2413d;
    --desk-red-soft: #fff0ef;
    --desk-shadow: 0 20px 50px rgba(35, 52, 78, 0.12);
    --desk-shadow-soft: 0 10px 28px rgba(35, 52, 78, 0.08);
    --desk-radius: 8px;
    --desk-accent: var(--desk-blue);
    --desk-accent-soft: var(--desk-blue-soft);
    --bg-color: var(--desk-bg);
    --card-bg: var(--desk-surface);
    --secondary-color: var(--desk-surface-strong);
    --text-color: var(--desk-ink);
    --text-muted: var(--desk-muted);
    --accent-color: var(--desk-accent);
    --accent-glow: rgba(37, 99, 235, 0.16);
    --border-color: var(--desk-border);
    --input-bg: var(--desk-surface-soft);
    --gradient-color: var(--desk-bg);
    --card-shadow: var(--desk-shadow-soft);
}

body[data-subject-method="linguistic"] {
    --desk-accent: #7c3aed;
    --desk-accent-soft: #f1ecff;
    --accent-color: var(--desk-accent);
}

body[data-subject-method="exact"] {
    --desk-accent: #0f7a9d;
    --desk-accent-soft: #e3f6fb;
    --accent-color: var(--desk-accent);
}

body[data-subject-method="contextual"] {
    --desk-accent: #b7791f;
    --desk-accent-soft: #fff4d8;
    --accent-color: var(--desk-accent);
}

body:not(.light-mode) {
    --desk-bg: #101722;
    --desk-bg-line: rgba(226, 232, 240, 0.06);
    --desk-surface: #172131;
    --desk-surface-soft: #111a28;
    --desk-surface-strong: #202b3d;
    --desk-ink: #edf4fb;
    --desk-muted: #a9b8ca;
    --desk-border: #344256;
    --desk-border-strong: #52637a;
    --desk-blue-soft: rgba(37, 99, 235, 0.18);
    --desk-green-soft: rgba(21, 147, 108, 0.18);
    --desk-amber-soft: rgba(183, 121, 31, 0.2);
    --desk-red-soft: rgba(194, 65, 61, 0.2);
    --desk-shadow: 0 22px 60px rgba(2, 6, 12, 0.38);
    --desk-shadow-soft: 0 12px 34px rgba(2, 6, 12, 0.28);
}

* {
    letter-spacing: 0 !important;
}

body {
    min-height: 100vh;
    width: 100%;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--desk-bg) 88%, #ffffff 12%) 0%, var(--desk-bg) 36%),
        repeating-linear-gradient(0deg, transparent 0 31px, var(--desk-bg-line) 31px 32px),
        repeating-linear-gradient(90deg, transparent 0 31px, var(--desk-bg-line) 31px 32px);
    color: var(--desk-ink);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.light-mode {
    background:
        linear-gradient(180deg, #fbfdff 0%, var(--desk-bg) 36%),
        repeating-linear-gradient(0deg, transparent 0 31px, var(--desk-bg-line) 31px 32px),
        repeating-linear-gradient(90deg, transparent 0 31px, var(--desk-bg-line) 31px 32px);
}

.app-header,
.flow-stepper,
#app-container,
footer {
    width: min(1120px, calc(100% - 2rem));
    max-width: 1120px;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 40;
    margin: 0 auto;
    padding: 0.9rem 0;
    border-bottom: 1px solid color-mix(in srgb, var(--desk-border) 80%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--desk-ink);
    font-size: 1.08rem;
    font-weight: 800;
}

.logo::before {
    content: '';
    width: 2.05rem;
    height: 2.05rem;
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.34), transparent 48%),
        linear-gradient(135deg, var(--desk-accent), var(--desk-green));
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.18);
}

.header-actions {
    gap: 0.55rem;
}

.theme-toggle,
.text-action-btn,
.file-upload-btn,
.secondary-btn,
.primary-btn,
.magical-btn,
#start-btn,
#submit-answer-btn,
#submit-exam-btn,
#substep-next-btn,
#find-weak-points-btn,
#make-plan-btn,
#retake-diff-btn {
    border-radius: var(--desk-radius);
    min-height: 2.7rem;
    box-shadow: none;
}

.theme-toggle,
.text-action-btn,
.file-upload-btn,
.secondary-btn {
    background: var(--desk-surface);
    border-color: var(--desk-border);
    color: var(--desk-ink);
}

.theme-toggle:hover,
.text-action-btn:hover,
.file-upload-btn:hover,
.secondary-btn:hover {
    background: var(--desk-accent-soft);
    border-color: color-mix(in srgb, var(--desk-accent) 42%, var(--desk-border));
    color: var(--desk-ink);
    transform: translateY(-1px);
}

.primary-btn,
.magical-btn,
#start-btn,
#submit-answer-btn,
#submit-exam-btn,
#substep-next-btn,
#find-weak-points-btn,
#make-plan-btn,
#retake-diff-btn {
    background: var(--desk-accent);
    border: 1px solid color-mix(in srgb, var(--desk-accent) 84%, #ffffff);
    color: #ffffff;
    box-shadow: 0 12px 26px color-mix(in srgb, var(--desk-accent) 24%, transparent);
}

.primary-btn:hover,
.magical-btn:hover,
#start-btn:hover,
#submit-answer-btn:hover,
#submit-exam-btn:hover,
#substep-next-btn:hover,
#find-weak-points-btn:hover,
#make-plan-btn:hover,
#retake-diff-btn:hover {
    background: color-mix(in srgb, var(--desk-accent) 86%, #101827);
    color: #ffffff;
    box-shadow: 0 16px 32px color-mix(in srgb, var(--desk-accent) 28%, transparent);
}

.flow-stepper {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.45rem;
    margin: 0.35rem auto 0;
    padding: 0.45rem;
    border: 1px solid var(--desk-border);
    border-radius: 999px;
    background: color-mix(in srgb, var(--desk-surface) 88%, transparent);
    box-shadow: var(--desk-shadow-soft);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.flow-step {
    min-width: 0;
    min-height: 2.45rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    margin: 0;
    padding: 0.42rem 0.7rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--desk-muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.flow-step-index {
    width: 1.35rem;
    height: 1.35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--desk-surface-strong);
    color: var(--desk-muted);
    font-size: 0.72rem;
}

.flow-step-complete {
    color: var(--desk-green);
}

.flow-step-complete .flow-step-index {
    background: var(--desk-green-soft);
    color: var(--desk-green);
}

.flow-step-active {
    background: var(--desk-accent-soft);
    color: var(--desk-accent);
    border-color: color-mix(in srgb, var(--desk-accent) 20%, var(--desk-border));
}

.flow-step-active .flow-step-index {
    background: var(--desk-accent);
    color: #ffffff;
}

.flow-step:disabled {
    cursor: default;
    opacity: 0.72;
}

#app-container {
    margin: 0 auto;
    padding: 2rem 0 3rem;
    gap: 1.25rem;
}

.view-section {
    align-items: stretch;
    gap: 1.15rem;
    text-align: left;
}

.view-title,
#roadmap-step-view #step-study-title,
#results-view h1 {
    color: var(--desk-ink);
    font-size: 2.45rem;
    line-height: 1.08;
    letter-spacing: 0;
    margin: 0;
    max-width: 780px;
    overflow-wrap: anywhere;
}

.view-description,
.charm-message,
.grading-hint,
.quiz-intro {
    max-width: 760px;
    color: var(--desk-muted);
    font-size: 1rem;
    line-height: 1.62;
}

.section-kicker,
.quiz-intro,
.coach-panel-label,
.coach-card-label,
.exam-brief-label,
.exam-status-label,
.exam-paper-label,
.badge {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 900;
    color: var(--desk-accent);
}

.landing-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    gap: 1.5rem;
    align-items: stretch;
    min-height: 420px;
    min-width: 0;
}

.landing-copy,
.study-desk-preview,
.reference-panel,
.coach-panel,
#question-container,
#feedback-container,
#session-summary,
.exam-paper-shell,
.step-study-container,
.upload-workbench {
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
}

.landing-copy,
.study-desk-preview {
    min-width: 0;
}

.reference-panel {
    max-height: none;
    overflow: visible;
}

.panel-header {
    border-bottom-color: var(--desk-border);
    padding-bottom: 0.7rem;
}

.loading-text {
    font-size: 1.45rem;
}

.landing-copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    padding: clamp(1.4rem, 4vw, 3rem);
    position: relative;
}

.landing-copy::after {
    content: '';
    position: absolute;
    inset: auto 1.25rem 1.25rem auto;
    width: 5rem;
    height: 5rem;
    border-radius: 8px;
    background:
        linear-gradient(90deg, transparent 49%, color-mix(in srgb, var(--desk-accent) 18%, transparent) 50%, transparent 51%),
        linear-gradient(0deg, transparent 49%, color-mix(in srgb, var(--desk-accent) 18%, transparent) 50%, transparent 51%),
        var(--desk-accent-soft);
    opacity: 0.75;
}

.landing-copy .view-title {
    font-size: 3.15rem;
}

.landing-copy #landing-start-btn {
    width: fit-content;
    animation: none;
    background: var(--desk-accent);
    box-shadow: 0 16px 34px color-mix(in srgb, var(--desk-accent) 24%, transparent);
}

.landing-copy #landing-start-btn::before {
    content: none;
}

.landing-signal-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
    margin-top: 0.25rem;
    max-width: 560px;
}

.landing-signal-grid div {
    min-height: 5.6rem;
    padding: 0.85rem;
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface-soft);
}

.landing-signal-grid span {
    display: block;
    color: var(--desk-accent);
    font-size: 1.55rem;
    font-weight: 900;
}

.landing-signal-grid p {
    margin: 0.25rem 0 0;
    color: var(--desk-muted);
    font-size: 0.84rem;
    line-height: 1.35;
}

.study-desk-preview {
    min-height: 100%;
    position: relative;
    overflow: hidden;
    padding: 1.4rem;
    background:
        linear-gradient(0deg, transparent 0 23px, color-mix(in srgb, var(--desk-border) 42%, transparent) 24px),
        linear-gradient(90deg, transparent 0 23px, color-mix(in srgb, var(--desk-border) 42%, transparent) 24px),
        var(--desk-surface-soft);
    background-size: 24px 24px, 24px 24px, auto;
}

.desk-paper {
    position: absolute;
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
}

.desk-paper-main {
    inset: 3rem 2.2rem auto 2rem;
    height: 205px;
    padding: 1.2rem;
}

.desk-paper-side {
    right: 2rem;
    bottom: 2.2rem;
    width: 46%;
    min-height: 150px;
    padding: 1rem;
    transform: rotate(1.5deg);
}

.desk-paper-label,
.desk-paper-side span {
    display: inline-flex;
    margin-bottom: 1rem;
    color: var(--desk-accent);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.desk-line {
    height: 0.75rem;
    margin: 0.72rem 0;
    border-radius: 999px;
    background: var(--desk-surface-strong);
}

.desk-line-strong {
    width: 72%;
    background: color-mix(in srgb, var(--desk-accent) 26%, var(--desk-surface-strong));
}

.desk-line-short {
    width: 48%;
}

.desk-check-row {
    height: 1.05rem;
    margin: 0.72rem 0;
    border-radius: 999px;
    background: var(--desk-green-soft);
    position: relative;
}

.desk-check-row::before {
    content: '';
    position: absolute;
    left: 0.35rem;
    top: 0.3rem;
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 999px;
    background: var(--desk-green);
}

.desk-check-row.muted {
    background: var(--desk-surface-strong);
}

.desk-check-row.muted::before {
    background: var(--desk-muted);
}

.desk-timer {
    position: absolute;
    left: 2rem;
    bottom: 2.3rem;
    width: 7.5rem;
    height: 7.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid color-mix(in srgb, var(--desk-accent) 28%, var(--desk-border));
    border-radius: var(--desk-radius);
    background: var(--desk-accent-soft);
    color: var(--desk-accent);
}

.desk-timer span {
    font-size: 2rem;
    font-weight: 900;
}

.desk-timer small {
    color: var(--desk-muted);
    font-weight: 800;
}

.landing-process-panel {
    padding: 1.15rem;
}

.landing-process-panel ol {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.7rem;
    padding: 0 !important;
    list-style: none;
}

.landing-process-panel li {
    min-height: 6.2rem;
    display: flex;
    align-items: flex-end;
    padding: 0.85rem;
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface-soft);
    color: var(--desk-muted);
    font-size: 0.88rem;
    line-height: 1.35;
    position: relative;
}

.landing-process-panel li::before {
    content: counter(list-item);
    position: absolute;
    top: 0.7rem;
    left: 0.75rem;
    width: 1.5rem;
    height: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--desk-accent-soft);
    color: var(--desk-accent);
    font-size: 0.75rem;
    font-weight: 900;
}

.selection-status {
    flex-wrap: wrap;
    gap: 0.55rem;
    margin: 0;
}

.status-chip {
    border-radius: 999px;
    background: var(--desk-surface);
    border-color: var(--desk-border);
    color: var(--desk-muted);
    box-shadow: none;
}

.subject-grid,
.goal-grid,
.time-grid {
    max-width: none;
    width: 100%;
}

.subject-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.8rem;
}

.category-header {
    margin: 1rem 0 0;
    color: var(--desk-muted);
    border-bottom: 1px solid var(--desk-border);
}

.subject-card,
.time-card,
.goal-card,
.exam-option-card,
.exam-type-card {
    border-radius: var(--desk-radius);
    border: 1px solid var(--desk-border);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
}

.subject-card {
    min-height: 8rem;
    justify-content: space-between;
}

.subject-card:hover,
.time-card:hover,
.goal-card:hover,
.exam-option-card:hover,
.exam-type-card:hover {
    border-color: color-mix(in srgb, var(--desk-accent) 34%, var(--desk-border));
    background: var(--desk-accent-soft);
    transform: translateY(-2px);
}

.subject-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--desk-radius);
    background: var(--desk-surface-strong);
    font-size: 1.35rem;
}

.goal-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.9rem;
}

.goal-card {
    min-height: 18rem;
    padding: 1.2rem;
}

.goal-card.selected {
    border-color: color-mix(in srgb, var(--desk-accent) 52%, var(--desk-border));
    background: var(--desk-accent-soft);
}

.goal-card-icon {
    width: 3rem;
    height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--desk-radius);
    background: var(--desk-surface-strong);
    color: var(--desk-accent);
    position: relative;
}

.goal-card-icon::before,
.goal-card-icon::after {
    content: '';
    position: absolute;
}

.goal-card-icon-target::before {
    width: 1.35rem;
    height: 1.35rem;
    border: 3px solid currentColor;
    border-radius: 999px;
}

.goal-card-icon-target::after {
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 999px;
    background: currentColor;
}

.goal-card-icon-timer::before {
    width: 1.25rem;
    height: 1.25rem;
    border: 3px solid currentColor;
    border-radius: 999px;
}

.goal-card-icon-timer::after {
    width: 0.55rem;
    height: 0.22rem;
    border-left: 3px solid currentColor;
    border-bottom: 3px solid currentColor;
    transform: translate(0.12rem, -0.08rem) rotate(-45deg);
}

.goal-card-icon-summary::before {
    width: 1.25rem;
    height: 1.6rem;
    border: 3px solid currentColor;
    border-radius: 4px;
}

.goal-card-icon-summary::after {
    width: 0.8rem;
    height: 0.52rem;
    border-top: 3px solid currentColor;
    border-bottom: 3px solid currentColor;
}

.goal-card-icon-route::before {
    width: 1.4rem;
    height: 1.4rem;
    border: 3px solid currentColor;
    border-left-color: transparent;
    border-bottom-color: transparent;
    transform: rotate(45deg);
    border-radius: 4px;
}

.goal-card-icon-route::after {
    width: 1.15rem;
    height: 0.45rem;
    border-bottom: 3px dotted currentColor;
    transform: translateY(0.62rem);
}

.goal-card-label {
    margin-top: 0.25rem;
    font-size: 1.18rem;
    line-height: 1.18;
}

.goal-card-outcome {
    display: inline-flex;
    width: fit-content;
    padding: 0.35rem 0.55rem;
    border-radius: 999px;
    background: var(--desk-surface-strong);
    color: var(--desk-accent);
    font-size: 0.76rem;
    font-weight: 900;
}

.goal-card-description {
    color: var(--desk-muted);
    font-size: 0.94rem;
    line-height: 1.52;
}

.upload-workbench {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.9rem;
    padding: 1rem;
    align-items: start;
}

#upload-view .input-group {
    width: 100%;
    display: grid;
    gap: 0.85rem;
}

.upload-next-column {
    min-width: 0;
    display: grid;
    gap: 0.55rem;
    align-content: start;
}

.upload-next-column > .reference-toggle-link {
    justify-self: start;
    margin: 0;
}

.textarea-wrapper,
.drop-zone,
#upload-next-panel {
    border-radius: var(--desk-radius);
    border: 1px solid var(--desk-border);
    background: var(--desk-surface-soft);
}

.textarea-wrapper {
    padding: 0.85rem;
}

#raw-input,
.user-answer,
.quiz-steps,
.quiz-formula,
.quiz-result,
.quiz-unit {
    border-radius: var(--desk-radius);
    border-color: var(--desk-border);
    background: var(--desk-surface);
    color: var(--desk-ink);
}

#raw-input {
    min-height: 270px;
}

.drop-zone {
    min-height: 190px;
    border-style: dashed;
    border-width: 2px;
    padding: 1.2rem;
}

.drop-zone.dragover {
    background: var(--desk-accent-soft);
    border-color: var(--desk-accent);
}

#upload-next-panel {
    height: 100%;
    margin: 0;
    max-height: none;
    padding: 1.1rem;
}

#upload-next-panel ol,
#upload-next-panel ul {
    display: grid;
    gap: 0.45rem;
}

.file-list li {
    border-radius: var(--desk-radius);
    background: var(--desk-surface);
    border: 1px solid var(--desk-border);
}

.loader-container,
.charm-container {
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
    padding: 2rem;
}

#question-container,
#feedback-container {
    padding: clamp(1.2rem, 3vw, 2rem);
}

#question-container {
    position: relative;
    border-left: 5px solid var(--desk-accent);
}

.display-question {
    color: var(--desk-ink);
    font-size: 1.65rem;
    line-height: 1.24;
    margin: 0 0 1rem;
}

.peek-btn {
    width: fit-content;
    min-height: 2.25rem;
    margin-bottom: 0.85rem !important;
}

.peek-panel {
    border-left: 4px solid var(--desk-amber);
    background: var(--desk-amber-soft);
}

.ui-library-target {
    display: grid;
    gap: 0.8rem;
}

.ui-component-options button,
.modal-choice-btn {
    border-radius: var(--desk-radius);
    border-color: var(--desk-border);
    background: var(--desk-surface);
}

.option-correct {
    background: var(--desk-green) !important;
    color: #ffffff !important;
}

.option-incorrect {
    background: var(--desk-red) !important;
    color: #ffffff !important;
}

.ai-feedback-box,
.correct-answer-box {
    border-radius: var(--desk-radius);
    border: 1px solid var(--desk-border);
    background: var(--desk-surface-soft);
    padding: 1rem;
}

.ai-feedback-box {
    border-left: 4px solid var(--desk-accent);
}

.correct-answer-box {
    border-left: 4px solid var(--desk-green);
}

.coach-panel {
    padding: 1.1rem;
}

.coach-panel-header {
    align-items: flex-start;
}

.coach-grid,
.exam-brief-grid,
.exam-status-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.coach-card,
.exam-brief-card,
.exam-status-card {
    border-radius: var(--desk-radius);
    border-color: var(--desk-border);
    background: var(--desk-surface-soft);
    box-shadow: none;
}

.coach-score-pill,
.exam-option-recommendation {
    background: var(--desk-accent-soft);
    color: var(--desk-accent);
    border-radius: 999px;
}

.roadmap-path {
    display: grid;
    gap: 0.9rem;
    position: relative;
    padding-left: 1.4rem;
}

.roadmap-path::before {
    content: '';
    position: absolute;
    left: 1.65rem;
    top: 0.8rem;
    bottom: 0.8rem;
    width: 3px;
    background: var(--desk-border);
}

.roadmap-step {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
    border-radius: var(--desk-radius);
    border: 1px solid var(--desk-border);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
}

.roadmap-step:hover {
    border-color: color-mix(in srgb, var(--desk-accent) 34%, var(--desk-border));
    background: var(--desk-accent-soft);
    transform: translateY(-2px);
}

.step-circle {
    position: relative;
    z-index: 1;
    background: var(--desk-accent);
    color: #ffffff;
    box-shadow: 0 0 0 6px var(--desk-bg);
}

.mastered-step .step-circle {
    background: var(--desk-green);
}

.step-content h3,
.summary-panel h2,
.coach-card strong {
    color: var(--desk-ink);
}

.summary-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.summary-panel {
    min-height: 240px;
    border-color: var(--desk-border);
    background: var(--desk-surface);
    box-shadow: var(--desk-shadow-soft);
    position: relative;
    overflow: hidden;
}

.summary-panel::before {
    content: '';
    display: block;
    width: 2rem;
    height: 2rem;
    margin-bottom: 0.7rem;
    border-radius: var(--desk-radius);
    background:
        linear-gradient(90deg, transparent 48%, color-mix(in srgb, var(--desk-accent) 28%, transparent) 50%, transparent 52%),
        linear-gradient(0deg, transparent 48%, color-mix(in srgb, var(--desk-accent) 28%, transparent) 50%, transparent 52%),
        var(--desk-accent-soft);
}

.summary-panel ul {
    color: var(--desk-muted);
}

.exam-paper-shell {
    padding: clamp(1rem, 3vw, 1.5rem);
    background: var(--desk-surface);
}

.exam-paper-head {
    border-bottom-color: var(--desk-border);
}

.exam-question-shell {
    border-radius: var(--desk-radius);
    background: var(--desk-surface-soft);
    border: 1px solid var(--desk-border);
}

.badge,
#exam-mode-badge {
    display: inline-flex;
    width: fit-content;
    border-radius: 999px;
    background: var(--desk-red-soft);
    color: var(--desk-red);
}

.exam-option-card,
.exam-type-card {
    min-height: 12rem;
}

.exam-option-card.recommended {
    border-color: color-mix(in srgb, var(--desk-accent) 42%, var(--desk-border));
}

#session-summary {
    padding: 1.2rem;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
}

#session-summary p {
    margin: 0;
    padding: 0.85rem;
    border: 1px solid var(--desk-border);
    border-radius: var(--desk-radius);
    background: var(--desk-surface-soft);
    color: var(--desk-muted);
}

#session-summary span:last-child {
    display: block;
    margin-top: 0.25rem;
    color: var(--desk-ink);
    font-size: 1.2rem;
    font-weight: 900;
}

footer {
    margin: 0 auto;
    color: var(--desk-muted);
}

#landing-hero {
    display: none !important;
}

@media (max-width: 980px) {
    .landing-shell,
    .upload-workbench {
        grid-template-columns: 1fr;
    }

    .study-desk-preview {
        min-height: 340px;
    }

    .landing-process-panel ol,
    .goal-grid,
    .summary-grid,
    .subject-grid,
    .exam-options-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .exam-type-grid,
    .coach-grid,
    .exam-brief-grid,
    .exam-status-grid,
    #session-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .app-header,
    .flow-stepper,
    #app-container,
    footer {
        width: min(1120px, calc(100% - 1rem));
    }

    .app-header {
        position: static;
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.75rem;
        align-items: stretch;
        padding-inline: 0;
    }

    .header-actions {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        justify-content: stretch;
        gap: 0.45rem;
    }

    .header-actions .theme-toggle {
        width: 100%;
        min-width: 0;
        padding-inline: 0.55rem;
        white-space: normal;
    }

    .flow-stepper {
        border-radius: var(--desk-radius);
        grid-template-columns: repeat(5, minmax(2.1rem, 1fr));
        gap: 0.25rem;
    }

    .flow-step {
        min-height: 2.25rem;
        padding: 0.25rem;
    }

    .flow-step-label {
        display: none;
    }

    #app-container {
        padding-top: 1rem;
    }

    .landing-copy .view-title,
    .view-title,
    #roadmap-step-view #step-study-title,
    #results-view h1 {
        font-size: 2rem;
    }

    .landing-signal-grid,
    .landing-process-panel ol,
    .goal-grid,
    .summary-grid,
    .subject-grid,
    .time-grid,
    .exam-options-grid,
    .exam-type-grid,
    .coach-grid,
    .exam-brief-grid,
    .exam-status-grid,
    #session-summary {
        grid-template-columns: 1fr;
    }

    .goal-card {
        min-height: auto;
    }

    .study-desk-preview {
        display: none;
    }

    .landing-shell {
        min-height: auto;
    }

    .landing-copy {
        padding: 1.25rem;
        text-align: left;
    }

    .landing-copy .view-title {
        max-width: 100%;
        line-height: 1.08;
    }

    .landing-copy::after {
        width: 3.6rem;
        height: 3.6rem;
        opacity: 0.45;
    }

    #raw-input {
        min-height: 220px;
    }

    .roadmap-path {
        padding-left: 0.5rem;
    }

    .roadmap-path::before {
        left: 0.75rem;
    }
}

/* Brand clarity pass: calm trust-first blues, clearer next step guidance */
:root {
    --brand-blue-950: #10233f;
    --brand-blue-900: #16345f;
    --brand-blue-800: #1f4f8f;
    --brand-blue-700: #2563b8;
    --brand-blue-600: #2f73d8;
    --brand-blue-500: #4387f0;
    --brand-blue-300: #9cc7ff;
    --brand-blue-200: #cfe3ff;
    --brand-blue-100: #eaf3ff;
    --brand-blue-050: #f6faff;
    --brand-cyan-700: #0f6f94;
    --brand-cyan-100: #e4f6ff;
    --desk-bg: #f4f8fd;
    --desk-bg-line: rgba(31, 79, 143, 0.055);
    --desk-surface: #ffffff;
    --desk-surface-soft: var(--brand-blue-050);
    --desk-surface-strong: var(--brand-blue-100);
    --desk-ink: var(--brand-blue-950);
    --desk-muted: #526b8c;
    --desk-border: #d5e4f6;
    --desk-border-strong: #aac6ea;
    --desk-blue: var(--brand-blue-600);
    --desk-blue-soft: var(--brand-blue-100);
    --desk-green: var(--brand-cyan-700);
    --desk-green-soft: var(--brand-cyan-100);
    --desk-amber: var(--brand-blue-700);
    --desk-amber-soft: #edf6ff;
    --desk-red: #bf3434;
    --desk-red-soft: #fff1f1;
    --desk-accent: var(--brand-blue-600);
    --desk-accent-soft: var(--brand-blue-100);
    --accent-color: var(--desk-accent);
    --accent-glow: rgba(47, 115, 216, 0.16);
    --border-color: var(--desk-border);
}

body[data-subject-method="linguistic"] {
    --desk-accent: #365bd8;
    --desk-accent-soft: #eef3ff;
    --accent-color: var(--desk-accent);
}

body[data-subject-method="exact"] {
    --desk-accent: #0f6f94;
    --desk-accent-soft: #e4f6ff;
    --accent-color: var(--desk-accent);
}

body[data-subject-method="contextual"] {
    --desk-accent: #2563b8;
    --desk-accent-soft: #eaf3ff;
    --accent-color: var(--desk-accent);
}

body:not(.light-mode) {
    --desk-bg: #0f1724;
    --desk-bg-line: rgba(156, 199, 255, 0.055);
    --desk-surface: #162234;
    --desk-surface-soft: #111c2d;
    --desk-surface-strong: #1f3048;
    --desk-ink: #edf6ff;
    --desk-muted: #aac0db;
    --desk-border: #314969;
    --desk-border-strong: #4d6f98;
    --desk-blue-soft: rgba(67, 135, 240, 0.18);
    --desk-green-soft: rgba(15, 111, 148, 0.2);
    --desk-amber-soft: rgba(67, 135, 240, 0.16);
    --desk-red-soft: rgba(191, 52, 52, 0.2);
}

body:not(.light-mode)[data-subject-method="linguistic"] {
    --desk-accent: #7fb1ff;
    --desk-accent-soft: rgba(127, 177, 255, 0.16);
}

body:not(.light-mode)[data-subject-method="exact"] {
    --desk-accent: #65c8ee;
    --desk-accent-soft: rgba(101, 200, 238, 0.16);
}

body:not(.light-mode)[data-subject-method="contextual"] {
    --desk-accent: #8bbcff;
    --desk-accent-soft: rgba(139, 188, 255, 0.16);
}

.app-header,
.flow-stepper,
.flow-guidance,
#app-container,
footer {
    width: min(1120px, calc(100% - 2rem));
    max-width: 1120px;
}

.logo::before {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.36), transparent 48%),
        linear-gradient(135deg, var(--brand-blue-700), var(--brand-blue-300));
    box-shadow: 0 10px 22px rgba(47, 115, 216, 0.18);
}

.flow-step-complete {
    color: var(--brand-blue-700);
}

.flow-step-complete .flow-step-index {
    background: var(--brand-blue-100);
    color: var(--brand-blue-700);
}

body:not(.light-mode) .flow-step-complete,
body:not(.light-mode) .flow-step-complete .flow-step-index {
    color: var(--desk-accent);
}

.flow-guidance {
    margin: 0.85rem auto 0;
    padding: 0.85rem 0.95rem;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.9rem;
    border: 1px solid var(--desk-border);
    border-left: 4px solid var(--desk-accent);
    border-radius: var(--desk-radius);
    background: color-mix(in srgb, var(--desk-surface) 90%, var(--desk-accent-soft));
    box-shadow: var(--desk-shadow-soft);
}

.flow-guidance-step,
.flow-guidance-action {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 900;
    white-space: nowrap;
}

.flow-guidance-step {
    padding: 0.32rem 0.6rem;
    background: var(--desk-accent);
    color: #ffffff;
}

.flow-guidance-copy {
    min-width: 0;
}

.flow-guidance-copy strong {
    display: block;
    color: var(--desk-ink);
    font-size: 1rem;
    line-height: 1.25;
}

.flow-guidance-copy p {
    margin: 0.18rem 0 0;
    color: var(--desk-muted);
    font-size: 0.92rem;
    line-height: 1.38;
}

.flow-guidance-action {
    padding: 0.32rem 0.65rem;
    background: transparent;
    color: var(--desk-accent);
    border: 0;
    justify-content: flex-end;
}

.landing-copy {
    border-left: 4px solid var(--desk-accent);
}

.landing-signal-grid div,
.landing-process-panel li,
.subject-card,
.goal-card,
.upload-workbench,
.reference-panel,
.coach-panel,
#question-container,
#feedback-container,
.exam-paper-shell,
.step-study-container,
#session-summary,
.summary-panel,
.roadmap-step {
    border-color: var(--desk-border);
}

.landing-signal-grid div {
    background: linear-gradient(180deg, var(--desk-surface), var(--desk-surface-soft));
}

.landing-signal-grid span,
.desk-paper-label,
.desk-paper-side span,
.desk-timer span,
.desk-timer small,
.goal-card-outcome,
.coach-score-pill,
.exam-option-recommendation,
.badge,
#exam-mode-badge {
    color: var(--desk-accent);
}

.study-desk-preview {
    background:
        linear-gradient(0deg, transparent 0 23px, color-mix(in srgb, var(--desk-accent) 10%, transparent) 24px),
        linear-gradient(90deg, transparent 0 23px, color-mix(in srgb, var(--desk-accent) 10%, transparent) 24px),
        var(--desk-surface-soft);
}

.desk-line-strong,
.desk-check-row,
.summary-panel::before,
.landing-copy::after {
    background:
        linear-gradient(90deg, transparent 49%, color-mix(in srgb, var(--desk-accent) 18%, transparent) 50%, transparent 51%),
        linear-gradient(0deg, transparent 49%, color-mix(in srgb, var(--desk-accent) 18%, transparent) 50%, transparent 51%),
        var(--desk-accent-soft);
}

.desk-line {
    background: var(--desk-surface-strong);
}

.desk-check-row::before,
.desk-check-row.muted::before {
    background: var(--desk-accent);
}

.desk-timer,
.goal-card-outcome,
.coach-score-pill,
.exam-option-recommendation,
.badge,
#exam-mode-badge {
    background: var(--desk-accent-soft);
}

.peek-panel,
.correct-answer-box {
    border-left-color: var(--desk-accent);
    background: var(--desk-accent-soft);
}

.option-correct {
    background: var(--brand-cyan-700) !important;
}

.option-incorrect {
    background: var(--desk-red) !important;
}

.goal-card {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.goal-card-cue {
    display: block;
    padding: 0.72rem;
    border-radius: var(--desk-radius);
    background: var(--desk-accent-soft);
    color: var(--desk-ink);
    font-size: 0.9rem;
    font-weight: 800;
    line-height: 1.35;
}

.goal-card-description {
    margin-top: auto;
}

#upload-next-panel {
    border-left: 4px solid var(--desk-accent);
}

#loading-view .loader-container {
    position: relative;
    isolation: isolate;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
    padding-inline: 1rem;
}

#loading-view .loader-container::before {
    content: none !important;
    display: none !important;
}

#loading-view .ai-analysis-loader::before {
    opacity: 0.98;
}

body:not(.light-mode) #loading-view .ai-analysis-loader::after {
    background:
        radial-gradient(circle at 26% 18%, rgba(255, 255, 255, 0.46), transparent 24%),
        linear-gradient(145deg, rgba(237, 246, 255, 0.18), rgba(237, 246, 255, 0.06) 48%, rgba(237, 246, 255, 0.1));
    border-color: rgba(156, 199, 255, 0.34);
    box-shadow:
        0 24px 62px rgba(5, 13, 28, 0.32),
        inset 0 1px 0 rgba(255, 255, 255, 0.28),
        inset 0 -18px 32px rgba(237, 246, 255, 0.08);
}

body:not(.light-mode) .theme-toggle,
body:not(.light-mode) .text-action-btn,
body:not(.light-mode) .file-upload-btn,
body:not(.light-mode) .secondary-btn,
body:not(.light-mode) #report-issue-btn {
    background: var(--desk-surface);
    border-color: var(--desk-border-strong);
    color: var(--desk-ink);
}

@media (max-width: 720px) {
    .app-header,
    .flow-stepper,
    .flow-guidance,
    #app-container,
    footer {
        width: min(1120px, calc(100% - 1rem));
    }

    .flow-guidance {
        grid-template-columns: 1fr;
        gap: 0.55rem;
        align-items: start;
    }

    .flow-guidance-step,
    .flow-guidance-action {
        width: fit-content;
        white-space: normal;
    }
}

/* Theme coverage guard: keep every app surface tied to light/dark variables */
body.light-mode {
    color-scheme: light;
    --theme-bg: #e9f1fb;
    --theme-surface: #f8fbff;
    --theme-surface-soft: #eef5fd;
    --theme-surface-strong: #dfeafa;
    --theme-elevated: #f4f8fe;
    --theme-ink: var(--brand-blue-950);
    --theme-muted: #4b6383;
    --theme-border: #bfd2eb;
    --theme-field: #f7fbff;
    --theme-field-soft: #edf5ff;
    --theme-shadow: 0 16px 38px rgba(31, 79, 143, 0.11);
    --theme-positive-soft: #d9f0f8;
    --theme-negative-soft: #fde7eb;
    --bg-color: var(--theme-bg);
    --card-bg: var(--theme-surface);
    --secondary-color: var(--theme-surface-soft);
    --text-color: var(--theme-ink);
    --text-muted: var(--theme-muted);
    --border-color: var(--theme-border);
    --input-bg: var(--theme-field);
    --card-shadow: var(--theme-shadow);
    --desk-bg: var(--theme-bg);
    --desk-surface: var(--theme-surface);
    --desk-surface-soft: var(--theme-surface-soft);
    --desk-surface-strong: var(--theme-surface-strong);
    --desk-ink: var(--theme-ink);
    --desk-muted: var(--theme-muted);
    --desk-border: var(--theme-border);
}

body:not(.light-mode) {
    color-scheme: dark;
    --theme-bg: #0f1724;
    --theme-surface: #162234;
    --theme-surface-soft: #111c2d;
    --theme-surface-strong: #1f3048;
    --theme-elevated: #1b2a40;
    --theme-ink: #edf6ff;
    --theme-muted: #aac0db;
    --theme-border: #314969;
    --theme-field: #0d1726;
    --theme-field-soft: #122033;
    --theme-shadow: 0 20px 46px rgba(2, 6, 12, 0.34);
    --theme-positive-soft: rgba(15, 111, 148, 0.2);
    --theme-negative-soft: rgba(191, 52, 52, 0.2);
    --bg-color: var(--theme-bg);
    --card-bg: var(--theme-surface);
    --secondary-color: var(--theme-surface-soft);
    --text-color: var(--theme-ink);
    --text-muted: var(--theme-muted);
    --border-color: var(--theme-border);
    --input-bg: var(--theme-field);
    --card-shadow: var(--theme-shadow);
    --gradient-color: var(--theme-surface-soft);
    --desk-bg: var(--theme-bg);
    --desk-surface: var(--theme-surface);
    --desk-surface-soft: var(--theme-surface-soft);
    --desk-surface-strong: var(--theme-surface-strong);
    --desk-ink: var(--theme-ink);
    --desk-muted: var(--theme-muted);
    --desk-border: var(--theme-border);
}

body:not(.light-mode),
body:not(.light-mode) #app-container {
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--theme-bg) 86%, var(--theme-surface-strong)) 0%, var(--theme-bg) 36%),
        repeating-linear-gradient(0deg, transparent 0 31px, var(--desk-bg-line) 31px 32px),
        repeating-linear-gradient(90deg, transparent 0 31px, var(--desk-bg-line) 31px 32px);
    color: var(--theme-ink);
}

body.light-mode,
body.light-mode #app-container {
    background:
        radial-gradient(circle at 12% 0%, rgba(156, 199, 255, 0.32), transparent 28%),
        linear-gradient(180deg, #edf5ff 0%, var(--theme-bg) 42%),
        repeating-linear-gradient(0deg, transparent 0 31px, var(--desk-bg-line) 31px 32px),
        repeating-linear-gradient(90deg, transparent 0 31px, var(--desk-bg-line) 31px 32px);
    color: var(--theme-ink);
}

:is(
    .app-header,
    .flow-stepper,
    .flow-guidance,
    .help-shell,
    .faq-item,
    .landing-copy,
    .landing-process-panel,
    .landing-resume-panel,
    .upload-workbench,
    #upload-next-panel,
    .reference-panel,
    .selection-status,
    .goal-card,
    .subject-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-panel,
    .coach-card,
    .exam-brief-panel,
    .exam-brief-card,
    .exam-status-card,
    .exam-paper-shell,
    .exam-question-shell,
    .exam-rules-panel,
    .exam-grid,
    .exam-flashcard-card,
    .exam-flashcard-surface,
    .step-study-container,
    .step-overview-panel,
    .substep-card,
    #question-container,
    #feedback-container,
    #session-summary,
    .roadmap-step,
    .roadmap-step-learn-card,
    .roadmap-step-read-card,
    .roadmap-flashcard-cue,
    .peek-panel,
    .ai-feedback-box,
    .correct-answer-box,
    .modal-content,
    .modal-field,
    .modal-fieldset,
    .charm-container,
    .drop-zone,
    .file-list li,
    .textarea-wrapper,
    .symbol-tray,
    .ui-component-options,
    .ui-component-exact,
    .ui-component-custom,
    .ui-component-text,
    .practice-card,
    .practice-stimulus,
    .practice-match-row,
    .practice-order-row,
    .practice-category-row,
    .practice-table-shell,
    .practice-field,
    .data-table-row,
    .topic-stat-item,
    .session-feedback-rating-grid button,
    .session-feedback-tag-grid button,
    .modal-choice-btn
) {
    background: var(--theme-surface);
    border-color: var(--theme-border);
    color: var(--theme-ink);
}

:is(
    .landing-signal-grid div,
    #session-summary p,
    .goal-card-cue,
    .exam-brief-card,
    .exam-status-card,
    .roadmap-step-learn-note,
    .roadmap-step-prompt,
    .roadmap-step-chip,
    .roadmap-flashcard-label,
    .quiz-formula,
    .quiz-steps,
    .quiz-result,
    .quiz-unit,
    .practice-chip,
    .exam-flashcard-chip,
    .exam-flashcard-chip-muted,
    .badge,
    #exam-mode-badge,
    .coach-score-pill,
    .goal-card-outcome,
    .exam-option-recommendation
) {
    background: var(--theme-surface-soft);
    border-color: var(--theme-border);
    color: var(--theme-ink);
}

body:not(.light-mode) :is(
    .landing-copy,
    .upload-workbench,
    .selection-status,
    .goal-card,
    .subject-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .exam-rules-panel,
    .step-study-container,
    #question-container,
    #feedback-container,
    .modal-content,
    .charm-container,
    .drop-zone,
    .textarea-wrapper,
    .symbol-tray,
    .ui-component-options,
    .ui-component-exact,
    .ui-component-custom,
    .ui-component-text,
    .exam-flashcard-card,
    .exam-flashcard-surface
) {
    background: linear-gradient(180deg, var(--theme-surface), var(--theme-surface-soft));
    box-shadow: var(--theme-shadow);
}

body.light-mode :is(
    .landing-copy,
    .upload-workbench,
    .selection-status,
    .goal-card,
    .subject-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .step-study-container,
    #question-container,
    #feedback-container,
    .modal-content,
    .drop-zone,
    .textarea-wrapper,
    .symbol-tray,
    .ui-component-options,
    .ui-component-exact,
    .ui-component-custom,
    .ui-component-text,
    .exam-flashcard-card,
    .exam-flashcard-surface
) {
    background: linear-gradient(180deg, var(--theme-surface), var(--theme-surface-soft));
    box-shadow: var(--theme-shadow);
}

body:not(.light-mode) :is(
    input,
    textarea,
    select,
    .modal-textarea,
    .modal-select,
    .practice-fill-input,
    .practice-step-input,
    .practice-table-input,
    .exam-grid input,
    #raw-input,
    #user-answer
) {
    background: var(--theme-field);
    border-color: var(--theme-border);
    color: var(--theme-ink);
    caret-color: var(--desk-accent);
}

body.light-mode :is(
    input,
    textarea,
    select,
    .modal-textarea,
    .modal-select,
    .practice-fill-input,
    .practice-step-input,
    .practice-table-input,
    .exam-grid input,
    #raw-input,
    #user-answer
) {
    background: var(--theme-field);
    border-color: var(--theme-border);
    color: var(--theme-ink);
    caret-color: var(--desk-accent);
}

:is(input, textarea, select)::placeholder {
    color: var(--theme-muted);
    opacity: 0.82;
}

body:not(.light-mode) :is(
    .secondary-btn,
    .text-action-btn,
    .file-upload-btn,
    .file-picker-btn,
    .camera-capture-btn,
    .theme-toggle,
    #help-link,
    #report-issue-btn,
    .peek-btn,
    .status-chip,
    .remove-file-btn,
    .practice-order-btn
) {
    background: var(--theme-surface-strong);
    border-color: var(--theme-border);
    color: var(--theme-ink);
}

body.light-mode :is(
    .secondary-btn,
    .text-action-btn,
    .file-upload-btn,
    .file-picker-btn,
    .camera-capture-btn,
    .theme-toggle,
    #help-link,
    #report-issue-btn,
    .peek-btn,
    .status-chip,
    .remove-file-btn,
    .practice-order-btn
) {
    background: var(--theme-surface);
    border-color: var(--theme-border);
    color: var(--theme-ink);
}

:is(
    .primary-btn,
    .magical-btn,
    #landing-start-btn,
    #start-btn,
    #submit-answer-btn,
    #submit-exam-btn,
    #roadmap-next-btn,
    #summary-practice-btn,
    #summary-plan-btn
) {
    background: linear-gradient(135deg, var(--desk-accent), color-mix(in srgb, var(--desk-accent) 70%, var(--brand-cyan-700)));
    border-color: color-mix(in srgb, var(--desk-accent) 78%, var(--theme-border));
    color: #ffffff;
}

body:not(.light-mode) :is(
    .view-title,
    .display-question,
    .step-content h3,
    .summary-panel h2,
    .coach-card strong,
    .flow-guidance-copy strong,
    .exam-paper-head h2,
    .modal-content h2,
    .landing-copy h1,
    .landing-copy h2,
    .panel-header h2,
    .step-study-title,
    #step-study-title
) {
    color: var(--theme-ink);
}

:is(
    .view-description,
    .loading-subtext,
    .charm-message,
    .grading-hint,
    .coach-summary,
    .roadmap-step p,
    .reference-panel p,
    .modal-content p,
    .exam-option-card p,
    .exam-type-card p,
    .summary-panel li,
    .roadmap-step-learn-note,
    .file-list li,
    .flow-guidance-copy p,
    .exam-paper-label,
    .coach-card-label,
    .coach-score-pill-meta
) {
    color: var(--theme-muted);
}

body:not(.light-mode) .landing-square,
body:not(.light-mode) .landing-square-blue,
body:not(.light-mode) .landing-square-green,
body:not(.light-mode) .exam-flashcard-stack::before,
body:not(.light-mode) .exam-flashcard-stack::after {
    background: var(--theme-surface-strong);
    border-color: var(--theme-border);
}

body.light-mode .landing-square,
body.light-mode .landing-square-blue,
body.light-mode .landing-square-green,
body.light-mode .exam-flashcard-stack::before,
body.light-mode .exam-flashcard-stack::after {
    background: var(--theme-surface);
    border-color: var(--theme-border);
}

body:not(.light-mode) :is(
    .option-correct,
    .feedback-state-correct,
    .correct-answer-box
) {
    background: color-mix(in srgb, var(--theme-positive-soft) 82%, var(--theme-surface));
}

body:not(.light-mode) :is(
    .option-incorrect,
    .feedback-state-needs-revision
) {
    background: color-mix(in srgb, var(--theme-negative-soft) 82%, var(--theme-surface));
}

body:not(.light-mode) .modal-overlay {
    background: rgba(3, 7, 18, 0.72);
}

body.light-mode .modal-overlay {
    background: rgba(15, 23, 42, 0.36);
}

body.light-mode :is(
    .landing-copy,
    .upload-workbench,
    .selection-status,
    .goal-card,
    .subject-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-panel,
    .exam-paper-shell,
    .exam-question-shell,
    .step-study-container,
    #question-container,
    #feedback-container,
    .modal-content,
    .drop-zone,
    .textarea-wrapper,
    .symbol-tray,
    .ui-component-options,
    .ui-component-exact,
    .ui-component-custom,
    .ui-component-text,
    .exam-flashcard-card,
    .exam-flashcard-surface
) {
    background: linear-gradient(180deg, #f8fbff, #eef5fd);
    border-color: var(--theme-border);
}

body.light-mode :is(
    input,
    textarea,
    select,
    .modal-textarea,
    .modal-select,
    .practice-fill-input,
    .practice-step-input,
    .practice-table-input,
    .exam-grid input,
    #raw-input,
    #user-answer
) {
    background: #f3f8ff;
}

body.light-mode :is(
    .secondary-btn,
    .text-action-btn,
    .file-upload-btn,
    .file-picker-btn,
    .camera-capture-btn,
    .theme-toggle,
    #help-link,
    #report-issue-btn,
    .peek-btn,
    .status-chip,
    .remove-file-btn,
    .practice-order-btn
) {
    background: #eef5fd;
    border-color: var(--theme-border);
}

/* Spacing coverage guard: keep containers from touching across every flow */
:root {
    --space-2xs: 0.35rem;
    --space-xs: 0.55rem;
    --space-sm: 0.8rem;
    --space-md: 1rem;
    --space-lg: 1.25rem;
    --space-xl: clamp(1.35rem, 2.4vw, 1.9rem);
    --space-2xl: clamp(1.8rem, 3.5vw, 2.8rem);
    --panel-padding: clamp(1rem, 2.4vw, 1.55rem);
    --compact-panel-padding: clamp(0.78rem, 1.8vw, 1.05rem);
}

#app-container {
    gap: var(--space-xl);
    padding: clamp(1rem, 2.4vw, 2rem) clamp(1rem, 3vw, 2rem) clamp(2rem, 5vw, 3.25rem);
}

.view-section {
    width: 100%;
    max-width: 100%;
    gap: var(--space-xl);
    padding-block: clamp(0.75rem, 1.6vw, 1.25rem);
}

.view-section > * {
    max-width: 100%;
}

.app-header {
    margin-bottom: clamp(0.55rem, 1.6vw, 1.15rem);
}

.flow-stepper,
.flow-guidance {
    margin-bottom: var(--space-md);
}

:is(
    .landing-copy,
    .landing-process-panel,
    .landing-resume-panel,
    .landing-how-panel,
    .upload-workbench,
    #upload-next-panel,
    .selection-status,
    .reference-panel,
    .help-shell,
    .faq-item,
    .goal-card,
    .subject-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-panel,
    .coach-card,
    .exam-brief-panel,
    .exam-brief-card,
    .exam-status-card,
    .exam-paper-shell,
    .exam-question-shell,
    .exam-rules-panel,
    .exam-flashcard-card,
    .exam-flashcard-surface,
    .pre-exam-coach-panel,
    .pre-exam-difficulty-panel,
    .pre-exam-expectation-panel,
    .pre-exam-type-panel,
    .step-study-container,
    .step-overview-panel,
    .substep-card,
    #question-container,
    #feedback-container,
    #session-summary,
    .roadmap-step,
    .roadmap-step-learn-card,
    .roadmap-step-read-card,
    .roadmap-flashcard-cue,
    .peek-panel,
    .ai-feedback-box,
    .correct-answer-box,
    .modal-content,
    .modal-field,
    .modal-fieldset,
    .charm-container,
    .drop-zone,
    .textarea-wrapper,
    .symbol-tray,
    .ui-component-options,
    .ui-component-exact,
    .ui-component-custom,
    .ui-component-text,
    .practice-card,
    .practice-stimulus,
    .practice-match-row,
    .practice-order-row,
    .practice-category-row,
    .practice-table-shell,
    .data-table-row,
    .topic-stat-item
) {
    padding: var(--panel-padding);
}

:is(
    .status-chip,
    .badge,
    #exam-mode-badge,
    .goal-card-cue,
    .coach-score-pill,
    .goal-card-outcome,
    .exam-option-recommendation,
    .roadmap-step-chip,
    .roadmap-flashcard-label,
    .exam-flashcard-chip,
    .practice-chip,
    .modal-choice-btn
) {
    padding-block: clamp(0.28rem, 0.8vw, 0.48rem);
    padding-inline: clamp(0.55rem, 1.4vw, 0.85rem);
}

:is(
    .modal-field,
    .modal-fieldset,
    .file-list li,
    .practice-match-row,
    .practice-order-row,
    .practice-category-row,
    .data-table-row,
    .topic-stat-item
) {
    padding: var(--compact-panel-padding);
}

:is(
    .landing-shell,
    .upload-workbench,
    .goal-grid,
    .session-goal-grid,
    .subject-grid,
    .time-grid,
    .summary-grid,
    .exam-options-grid,
    .exam-type-grid,
    .exam-brief-grid,
    .exam-status-grid,
    .coach-grid,
    .landing-signal-grid,
    .landing-process-panel ol,
    .modal-choice-grid,
    .practice-chip-grid,
    .practice-matching-grid,
    .practice-categorization-grid,
    .practice-diagram-labels,
    #session-summary,
    .file-list
) {
    gap: var(--space-lg);
}

:is(
    .header-actions,
    .action-row,
    .action-area,
    .modal-actions,
    .textarea-actions,
    .upload-picker-row,
    .file-list-actions,
    .coach-panel-header,
    .exam-paper-head,
    .exam-option-topline,
    .exam-header,
    .panel-header,
    .step-header,
    .pre-exam-panel-action,
    .roadmap-step-stage,
    .exam-flashcard-meta
) {
    gap: var(--space-sm);
}

:is(
    .header-actions,
    .action-row,
    .action-area,
    .modal-actions,
    .textarea-actions,
    .upload-picker-row,
    .file-list-actions,
    .coach-panel-header,
    .exam-paper-head,
    .exam-header,
    .panel-header,
    .step-header
) {
    flex-wrap: wrap;
}

:is(
    .modal-form,
    .modal-body,
    .input-group,
    .exam-grid,
    .coach-panel,
    .coach-card,
    .summary-panel,
    .step-study-container,
    .substep-card,
    .roadmap-step-learn-card,
    .roadmap-step-read-card,
    .practice-card,
    .exam-flashcard-layout,
    .exam-flashcard-card,
    .exam-flashcard-answer-area,
    .pre-exam-coach-panel,
    .pre-exam-difficulty-panel,
    .pre-exam-expectation-panel,
    .pre-exam-type-panel,
    .upload-next-column,
    .landing-copy,
    .landing-resume-panel,
    .landing-process-panel,
    .faq-list
) {
    gap: var(--space-md);
}

:is(
    .modal-form,
    .modal-body,
    .input-group,
    .upload-next-column,
    .landing-copy,
    .landing-resume-panel,
    .landing-process-panel,
    .faq-list
) > * + * {
    margin-top: var(--space-sm);
}

:is(
    .view-title,
    .view-description,
    .section-kicker,
    .landing-kicker,
    .summary-panel h2,
    .summary-panel p,
    .summary-panel ul,
    .coach-summary,
    .exam-option-card h3,
    .exam-option-card p,
    .exam-type-card h3,
    .exam-type-card p,
    .modal-content h2,
    .modal-content p,
    .roadmap-step p,
    .roadmap-step-learn-title,
    .roadmap-step-learn-concept,
    .roadmap-step-learn-note,
    .roadmap-step-prompt,
    .charm-message,
    .loading-text,
    .loading-subtext
) {
    margin-top: 0;
}

:is(
    .view-title,
    .panel-header,
    .exam-paper-head,
    .coach-panel-header,
    .step-header,
    .roadmap-step-prompt,
    .practice-stimulus,
    .reference-panel,
    .peek-panel
) {
    margin-bottom: var(--space-md);
}

:is(
    input,
    textarea,
    select,
    #raw-input,
    #user-answer,
    .modal-textarea,
    .modal-select,
    .practice-field,
    .practice-select,
    .practice-fill-input,
    .practice-step-input,
    .practice-table-input,
    .exam-grid input
) {
    padding: clamp(0.78rem, 1.7vw, 1rem);
}

.file-list {
    display: grid;
    padding: 0;
    margin: var(--space-md) 0 0;
}

.file-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

:is(
    .subject-card,
    .goal-card,
    .time-card,
    .exam-option-card,
    .exam-type-card,
    .summary-panel,
    .coach-card,
    .roadmap-step,
    .practice-card,
    .data-table-row,
    .modal-choice-btn
) {
    min-width: 0;
}

:is(.reference-panel, .coach-panel, .exam-brief-panel, .exam-rules-panel, .peek-panel) + :is(.reference-panel, .coach-panel, .exam-brief-panel, .exam-rules-panel, .peek-panel) {
    margin-top: var(--space-md);
}

@media (max-width: 720px) {
    #app-container {
        gap: var(--space-lg);
        padding: 0.85rem 0.85rem 2.25rem;
    }

    .view-section {
        gap: var(--space-lg);
        padding-block: 0.55rem;
    }

    :is(
        .landing-copy,
        .landing-process-panel,
        .landing-resume-panel,
        .landing-how-panel,
        .upload-workbench,
        #upload-next-panel,
        .selection-status,
        .reference-panel,
        .goal-card,
        .subject-card,
        .time-card,
        .exam-option-card,
        .exam-type-card,
        .summary-panel,
        .coach-panel,
        .exam-paper-shell,
        .exam-question-shell,
        .step-study-container,
        #question-container,
        #feedback-container,
        .modal-content,
        .drop-zone,
        .textarea-wrapper,
        .practice-card
    ) {
        padding: var(--compact-panel-padding);
    }

    :is(
        .landing-shell,
        .upload-workbench,
        .goal-grid,
        .subject-grid,
        .time-grid,
        .summary-grid,
        .exam-options-grid,
        .exam-type-grid,
        .exam-brief-grid,
        .exam-status-grid,
        .coach-grid,
        #session-summary
    ) {
        gap: var(--space-sm);
    }

    :is(.action-row, .action-area, .modal-actions, .textarea-actions, .upload-picker-row) {
        gap: var(--space-xs);
    }
}

/* Full-width header guard */
.app-header {
    width: 100% !important;
    max-width: none !important;
    margin: 0 0 clamp(0.65rem, 1.6vw, 1.15rem) !important;
    padding: 0 !important;
    display: block !important;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 60;
    border-bottom: 1px solid color-mix(in srgb, var(--theme-border, var(--desk-border)) 82%, transparent);
    background: color-mix(in srgb, var(--theme-surface, var(--desk-surface)) 88%, transparent);
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

body.light-mode .app-header {
    background: rgba(239, 245, 253, 0.94);
    border-bottom-color: #bed0e8;
    box-shadow: 0 10px 26px rgba(31, 79, 143, 0.08);
}

.app-header-inner {
    width: min(1120px, calc(100% - 2rem));
    max-width: 1120px;
    margin: 0 auto;
    padding: 0.85rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm, 0.8rem);
    box-sizing: border-box;
}

.app-header .logo,
.app-header .header-actions {
    min-width: 0;
}

.app-header .header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: var(--space-xs, 0.55rem);
}

body:not(.light-mode) .app-header {
    background: color-mix(in srgb, var(--theme-surface, var(--desk-surface)) 90%, rgba(3, 7, 18, 0.44));
    box-shadow: 0 12px 32px rgba(2, 6, 12, 0.28);
}

@media (max-width: 720px) {
    .app-header-inner {
        width: min(1120px, calc(100% - 1rem));
        padding: 0.72rem 0;
        display: grid;
        grid-template-columns: 1fr;
        align-items: stretch;
        gap: var(--space-xs, 0.55rem);
    }

    .app-header .header-actions {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.45rem;
    }

    .app-header .theme-toggle {
        width: 100%;
        min-width: 0;
        padding-inline: 0.55rem;
        white-space: normal;
    }
}

/* Earned progress moments */
.progress-bar {
    transform-origin: left center;
}

.progress-bar.progress-moment-pulse {
    height: 5px;
    background: linear-gradient(90deg, var(--brand-blue-600, var(--accent-color)), var(--brand-blue-300, #5aa9e6), var(--success-color));
    box-shadow: 0 0 18px color-mix(in srgb, var(--desk-accent, var(--accent-color)) 46%, transparent);
    animation: progressNudge 1.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-moment-hit {
    animation: progressMomentHit 1.25s cubic-bezier(0.22, 1, 0.36, 1);
    border-color: color-mix(in srgb, var(--success-color) 58%, var(--desk-accent, var(--accent-color))) !important;
    box-shadow:
        0 0 0 1px color-mix(in srgb, var(--success-color) 20%, transparent),
        0 16px 42px color-mix(in srgb, var(--desk-accent, var(--accent-color)) 18%, transparent),
        0 0 28px color-mix(in srgb, var(--success-color) 24%, transparent) !important;
}

.progress-moment-burst {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.progress-moment-burst::after {
    content: '';
    position: absolute;
    inset: -24%;
    z-index: 1;
    pointer-events: none;
    border-radius: inherit;
    background:
        radial-gradient(circle at 18% 24%, color-mix(in srgb, var(--success-color) 34%, transparent), transparent 18%),
        radial-gradient(circle at 72% 22%, color-mix(in srgb, var(--brand-blue-300, #5aa9e6) 34%, transparent), transparent 18%),
        linear-gradient(115deg, transparent 34%, rgba(255, 255, 255, 0.42) 49%, transparent 64%);
    opacity: 0;
    transform: translateX(-18%) scale(0.94);
    animation: progressMomentShine 1.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-moment-burst > * {
    position: relative;
    z-index: 2;
}

.progress-moment-settle {
    transition:
        border-color 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        background 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.9s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

.roadmap-step.mastered-step {
    position: relative;
    overflow: hidden;
}

.roadmap-step.mastered-step:not(.progress-moment-burst)::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(115deg, transparent 0 18%, color-mix(in srgb, var(--success-color) 14%, transparent) 42%, transparent 66%);
    opacity: 0;
    pointer-events: none;
}

.roadmap-step.mastered-step:not(.progress-moment-burst):hover::after {
    opacity: 1;
}

@keyframes progressMomentHit {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }
    28% {
        transform: translateY(-2px) scale(1.015);
        filter: brightness(1.08) saturate(1.08);
    }
    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

@keyframes progressMomentShine {
    0% {
        opacity: 0;
        transform: translateX(-24%) scale(0.94);
    }
    28% {
        opacity: 0.95;
    }
    100% {
        opacity: 0;
        transform: translateX(18%) scale(1.04);
    }
}

@keyframes progressNudge {
    0% { transform: scaleX(0.985); filter: brightness(1); }
    40% { transform: scaleX(1); filter: brightness(1.18); }
    100% { transform: scaleX(1); filter: brightness(1); }
}

@media (prefers-reduced-motion: reduce) {
    .progress-bar.progress-moment-pulse,
    .progress-moment-hit,
    .progress-moment-burst::after {
        animation: none !important;
    }

    .progress-moment-hit,
    .progress-moment-settle {
        transform: none !important;
        transition: none !important;
    }
}

/* Narrow viewport overflow guard */
@media (max-width: 720px) {
    html,
    body {
        width: 100% !important;
        max-width: 100% !important;
        overflow-x: hidden !important;
    }

    .app-header {
        padding-inline: 0.5rem !important;
    }

    .app-header-inner,
    .app-header .header-actions,
    .flow-stepper,
    .flow-guidance,
    #app-container,
    footer,
    .view-section,
    .landing-shell,
    .landing-copy,
    .landing-process-panel,
    .landing-resume-panel,
    .landing-how-panel,
    .upload-workbench,
    .selection-status,
    .goal-grid,
    .subject-grid,
    .time-grid,
    .summary-grid,
    .exam-options-grid,
    .exam-type-grid,
    .exam-brief-grid,
    .exam-status-grid,
    .coach-grid,
    .step-study-container,
    #question-container,
    #feedback-container,
    #session-summary {
        min-width: 0 !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .flow-stepper,
    .flow-guidance,
    #app-container,
    footer {
        width: calc(100% - 1rem) !important;
    }

    .landing-shell,
    .upload-workbench {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .app-header .header-actions {
        width: 100% !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    }

    .app-header .theme-toggle {
        width: 100% !important;
        min-width: 0 !important;
        max-width: 100% !important;
        padding-inline: 0.32rem !important;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .flow-guidance,
    .flow-guidance-copy,
    .flow-guidance-copy strong,
    .flow-guidance-copy p,
    .flow-guidance-action,
    .view-title,
    .view-description,
    .landing-copy,
    .landing-copy * {
        min-width: 0 !important;
        max-width: 100% !important;
        overflow-wrap: anywhere;
    }
}