/**
 * Subjects Module CSS
 * Styles for subjects, assessments, groups, and student answers
 */

/* =====================
   Subject Cards Grid
   ===================== */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.subject-card {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-large);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    height: 100%;
}

.subject-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

/* Clickable Card Styles */
a.clickable-card {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    display: flex;
}

a.clickable-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

a.clickable-card:active {
    transform: translateY(0);
}

a.subject-card.clickable-card {
    display: flex;
    flex-direction: column;
}

a.assessment-item.clickable-card,
a.student-answer-item.clickable-card {
    display: flex;
    align-items: center;
}

/* =====================
   Student Answer Item
   ===================== */
.student-answer-item {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.student-answer-item:hover {
    background-color: var(--md-sys-color-surface-container-low);
    box-shadow: var(--elevation-1);
}

/* Selection Checkbox */
.selection-checkbox {
    width: 20px;
    height: 20px;
    accent-color: var(--md-sys-color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.selection-checkbox:focus {
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: 2px;
}

/* Selection Toolbar */
.selection-toolbar {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-medium);
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.selection-toolbar.visible {
    display: flex;
}

/* Delete Button - Theme aware */
.delete-button {
    --md-filled-tonal-button-container-color: var(--md-sys-color-error-container);
    --md-filled-tonal-button-label-text-color: var(--md-sys-color-on-error-container);
    --md-filled-tonal-button-hover-label-text-color: var(--md-sys-color-on-error-container);
    --md-filled-tonal-button-focus-label-text-color: var(--md-sys-color-on-error-container);
    --md-filled-tonal-button-pressed-label-text-color: var(--md-sys-color-on-error-container);
}

.delete-button md-icon {
    color: var(--md-sys-color-on-error-container);
}

.selection-count {
    font-size: 14px;
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    min-width: 80px;
}

/* Bulk Actions Bar */
.bulk-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.graded-count {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--md-sys-color-on-surface-variant);
    margin-left: auto;
}

.graded-count md-icon {
    color: var(--md-sys-color-success, #1e8e3e);
}

/* Score Badge */
.score-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--md-sys-color-tertiary-container, #e8f5e9);
    color: var(--md-sys-color-on-tertiary-container, #1e8e3e);
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
}

.score-badge md-icon {
    color: inherit;
}

/* Icon Box States */
.icon-box.graded {
    background-color: var(--md-sys-color-tertiary-container, #e8f5e9);
    color: var(--md-sys-color-on-tertiary-container, #1e8e3e);
}

/* Grade Select Dropdown */
.grade-select {
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    font-size: 14px;
    cursor: pointer;
}

.grade-select:focus {
    outline: none;
    border-color: var(--md-sys-color-primary);
}

/* Warning Banner */
.warning-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--md-sys-color-warning-background, #fef7e0);
    border: 1px solid var(--md-sys-color-warning, #f9ab00);
    border-radius: var(--md-sys-shape-corner-medium);
    margin-bottom: 16px;
    margin-top: 16px;
}

.warning-banner md-icon {
    color: var(--md-sys-color-warning, #ea8600);
    font-size: 24px;
    flex-shrink: 0;
}

.warning-banner .banner-title {
    color: var(--md-sys-color-warning, #ea8600);
    font-weight: 500;
    margin-bottom: 4px;
}

.warning-banner .banner-description {
    color: var(--md-sys-color-on-surface-variant);
}

/* Error Banner */
.warning-banner.error-banner {
    background: var(--md-sys-color-error-background, #fce8e6);
    border-color: var(--md-sys-color-error, #d93025);
}

.warning-banner.error-banner md-icon {
    color: var(--md-sys-color-error, #d93025);
}

.warning-banner.error-banner .banner-title {
    color: var(--md-sys-color-error, #d93025);
}

.card-image {
    height: 160px;
    background-color: var(--md-sys-color-surface-container);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Placeholder icon when no image */
.card-image md-icon {
    font-size: 48px;
    color: var(--md-sys-color-on-surface-variant);
    border: none;
    outline: none;
    --md-icon-size: 48px;
}

.card-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-title {
    font-family: 'Roboto', sans-serif;
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0 0 8px 0;
    color: var(--md-sys-color-on-surface);
}

.card-description {
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 16px;
}

/* Stats Row */
.stats-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: auto;
    padding-top: 16px;
}

.stat-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--md-sys-color-on-surface-variant);
    background-color: var(--md-sys-color-surface-container);
    padding: 4px 8px;
    border-radius: 4px;
}

.stat-badge md-icon {
    font-size: 14px;
}

/* Actions Bar */
.actions-bar {
    display: flex;
    gap: 8px;
    padding: 8px 16px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
    justify-content: flex-end;
}

/* Responsive Actions */
.actions-bar.responsive-actions {
    border-top: none;
    padding: 0;
    justify-content: flex-start;
    margin-top: 24px;
    flex-wrap: wrap;
}

.actions-bar.header-actions {
    border-top: none;
    padding: 0;
}

/* =====================
   Header Section
   ===================== */
.header-section {
    background-color: var(--md-sys-color-surface);
    padding: 24px;
    border-radius: var(--md-sys-shape-corner-large);
    border: 1px solid var(--md-sys-color-outline-variant);
    margin-bottom: 24px;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

/* Section Header (smaller variant) */
.header-row.section-header {
    margin-bottom: 16px;
}

.header-row.section-header h3 {
    margin: 0;
}

.header-row .header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.header-row .header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.role-badge {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    vertical-align: middle;
    margin-left: 8px;
}

/* =====================
   Breadcrumb Navigation
   ===================== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.breadcrumb-text {
    font-size: 12px;
    color: var(--md-sys-color-on-surface-variant);
}

/* =====================
   Stats Grid
   ===================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--md-sys-color-surface-container);
    padding: 16px;
    border-radius: var(--md-sys-shape-corner-medium);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.stat-value {
    display: block;
    font-size: 32px;
    font-weight: 500;
    color: var(--md-sys-color-primary);
    margin-bottom: 8px;
}

.stat-value.score {
    color: var(--md-sys-color-tertiary);
}

.stat-value.percentage {
    color: #ea8600;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--md-sys-color-on-surface-variant);
}

/* =====================
   List Items
   ===================== */
.list-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
}

.list-item {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background-color var(--transition-fast);
}

.list-item:hover {
    background-color: var(--md-sys-color-surface-container-low);
}

.assessment-item {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background-color var(--transition-fast);
}

.assessment-item:hover {
    background-color: var(--md-sys-color-surface-container-low);
}

.group-item {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-small);
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--md-sys-shape-corner-small);
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* =====================
   Tabs
   ===================== */
.tabs-container {
    margin-bottom: 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.tab {
    appearance: none;
    background: none;
    border: none;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    color: var(--md-sys-color-on-surface-variant);
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab:hover {
    color: var(--md-sys-color-on-surface);
}

.tab.active {
    color: var(--md-sys-color-primary);
    border-bottom-color: var(--md-sys-color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* =====================
   Info Grid
   ===================== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    padding: 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--md-sys-color-on-surface-variant);
}

/* =====================
   Summary Card
   ===================== */
.summary-card {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 24px;
    margin-bottom: 24px;
}

/* =====================
   Question Cards
   ===================== */
.questions-section {
    margin-top: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.question-card {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-left: 4px solid var(--md-sys-color-primary);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 24px;
    margin-bottom: 16px;
    transition: box-shadow var(--transition-fast);
}

.question-card:hover {
    box-shadow: var(--elevation-1);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.question-content {
    margin-bottom: 16px;
}

.answer-section {
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
    padding: 16px;
    margin-top: 16px;
}

/* =====================
   Form Container (Simple)
   ===================== */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 48px;
}

.form-card {
    background: var(--md-sys-color-surface);
    padding: 32px;
    border-radius: var(--md-sys-shape-corner-large);
    border: 1px solid var(--md-sys-color-outline-variant);
}

.form-card h2 {
    margin-top: 0;
    margin-bottom: 24px;
}

/* Form Card Header Row */
.form-card .header-row {
    margin-bottom: 24px;
}

.form-card .header-row h2 {
    margin: 0;
}

.form-stack {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 16px;
}

/* =====================
   FAB Container
   ===================== */
.fab-container {
    position: fixed;
    bottom: 32px;
    right: 32px;
}

/* =====================
   Empty State
   ===================== */
.empty-state {
    text-align: center;
    margin-top: 64px;
    color: var(--md-sys-color-on-surface-variant);
}

.empty-state md-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.empty-state h3 {
    margin-bottom: 8px;
}

/* =====================
   Pagination
   ===================== */
.pagination {
    margin-top: 32px;
    display: flex;
    justify-content: center;
    gap: 8px;
}

/* =====================
   Status Indicators
   ===================== */
.status-success {
    color: var(--md-sys-color-tertiary);
}

.status-error {
    color: var(--md-sys-color-error);
}

.status-warning {
    color: #ea8600;
}

/* =====================
   Form Fields & Text
   ===================== */
.form-field {
    margin-bottom: 0;
}

.error-text {
    color: var(--md-sys-color-error);
    font-size: 12px;
    margin-top: 4px;
}

.help-text {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 12px;
    display: block;
    margin-top: 4px;
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 768px) {
    .subjects-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .header-row {
        flex-direction: column;
    }
    
    .header-title {
        flex-wrap: wrap;
    }
    
    .form-container {
        margin-top: 24px;
        padding: 0 16px;
    }
    
    .form-card {
        padding: 20px;
    }
    
    .assessment-item,
    .list-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .question-header {
        flex-direction: column;
    }
    
    /* Student Answer List - Tablet */
    .student-answer-item {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .selection-toolbar {
        gap: 8px;
    }
    
    .bulk-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .graded-count {
        margin-left: 0;
        justify-content: center;
    }
    
    .header-actions {
        width: 100%;
        justify-content: flex-start;
        margin-top: 12px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs-container {
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .tab {
        padding: 12px 16px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    /* Student Answer List - Mobile */
    .student-answer-item {
        padding: 12px;
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .student-answer-item .icon-box {
        width: 40px;
        height: 40px;
    }
    
    .student-answer-item > div[style*="flex: 1"] {
        flex-basis: calc(100% - 80px);
        order: 1;
    }
    
    .student-answer-item > div[style*="display: flex"][style*="gap: 8px"] {
        flex-basis: 100%;
        order: 3;
        justify-content: flex-end;
        margin-top: 8px;
    }
    
    .selection-toolbar {
        padding: 8px 12px;
    }
    
    .selection-toolbar md-filled-tonal-button {
        flex: 1;
        min-width: 0;
    }
    
    .score-badge {
        padding: 6px 12px;
        font-size: 13px;
    }
}

/* =====================
   Extracted Content Page
   ===================== */
.extracted-content-page .back-button {
    margin-bottom: 24px;
}

.extracted-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.extracted-stats-grid .stat-item {
    text-align: center;
    padding: 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.extracted-stats-grid .stat-value {
    display: block;
    font-size: 32px;
    font-weight: 500;
    color: var(--md-sys-color-primary);
    margin-bottom: 8px;
}

.extracted-stats-grid .stat-label {
    display: block;
    font-size: 14px;
    color: var(--md-sys-color-on-surface-variant);
}

.extraction-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    padding: 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.extraction-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.extraction-info-item .info-label {
    font-size: 12px;
    color: var(--md-sys-color-on-surface-variant);
}

.extraction-info-item .info-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
}

.questions-section {
    margin-top: 32px;
}

.questions-section .section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.question-card {
    background: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-left: 4px solid var(--md-sys-color-primary);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 24px;
    margin-bottom: 16px;
    transition: box-shadow 0.2s;
}

.question-card:hover {
    box-shadow: var(--elevation-2);
}

.question-badges {
    display: flex;
    gap: 8px;
    align-items: center;
}

.badge {
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
}

.badge-type {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.badge-marks {
    background: var(--md-sys-color-warning-background, #fef7e0);
    color: var(--md-sys-color-warning, #ea8600);
}

.question-section {
    margin-bottom: 16px;
}

.question-section h4 {
    font-size: 14px;
    font-weight: 500;
    color: var(--md-sys-color-primary);
    margin: 0 0 8px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.question-text-content {
    padding: 12px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
    line-height: 1.6;
    color: var(--md-sys-color-on-surface);
}

.structure-scheme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.detail-box {
    padding: 12px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.detail-box p {
    margin: 6px 0;
    font-size: 14px;
    line-height: 1.4;
    color: var(--md-sys-color-on-surface);
}

.detail-box strong {
    color: var(--md-sys-color-primary);
}

/* =====================
   Grading Results Page
   ===================== */
.grading-results-page .action-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.grading-results-page .action-buttons .grade-select {
    padding: 8px 16px;
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.grading-results-page .action-buttons .grade-select:hover {
    border-color: var(--md-sys-color-primary);
}

.grading-results-page .action-buttons .grade-select:focus {
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: 2px;
}

/* Questions Section */
.grading-results-page .questions-section {
    margin-top: 32px;
}

.grading-results-page .section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.grading-results-page .section-header h3 {
    margin: 0;
    color: var(--md-sys-color-on-surface);
}

/* Question Section inside cards */
.grading-results-page .question-section {
    margin-top: 16px;
}

.grading-results-page .question-section h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 8px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--md-sys-color-on-surface-variant);
}

/* Badge Score - consistent with extracted content */
.badge-score {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: var(--md-sys-color-success-background, #e6f4ea);
    color: var(--md-sys-color-success, #1e8e3e);
}

.badge-score.low {
    background: var(--md-sys-color-warning-background, #fef7e0);
    color: var(--md-sys-color-warning, #ea8600);
}

/* Question Card States */
.question-card.correct {
    border-left-color: var(--md-sys-color-success, #1e8e3e);
}

.question-card.partial {
    border-left-color: var(--md-sys-color-warning, #ea8600);
}

.question-card.incorrect {
    border-left-color: var(--md-sys-color-error, #d93025);
}

/* Sub-question Card - indented under parent */
.sub-question-card {
    margin-left: 24px;
    margin-top: 16px;
    padding: 16px;
    background: var(--md-sys-color-surface-container-low);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-left: 3px solid var(--md-sys-color-secondary);
    border-radius: var(--md-sys-shape-corner-small);
}

.sub-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.sub-question-header .md-typescale-label-large {
    color: var(--md-sys-color-on-surface);
    font-weight: 600;
}

/* Content Boxes for answers/feedback */
.content-box {
    padding: 12px 16px;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-small);
    line-height: 1.6;
    color: var(--md-sys-color-on-surface);
}

.content-box.student {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border-left: 3px solid var(--md-sys-color-primary);
}

.content-box.expected {
    background: var(--md-sys-color-success-background, #e6f4ea);
    color: var(--md-sys-color-on-surface);
    border-left: 3px solid var(--md-sys-color-success, #1e8e3e);
}

.content-box.feedback {
    background: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
    border-left: 3px solid var(--md-sys-color-tertiary);
}

/* Responsive for sub-questions */
@media (max-width: 480px) {
    .sub-question-card {
        margin-left: 12px;
        padding: 12px;
    }
    
    .sub-question-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}