:root {
  /* Backgrounds — aligned to landing palette */
  --background-dark:     #0A0B0D;
  --background-card:     #0F1115;
  --background-elevated: #14171C;
  --bg:                  #0A0B0D;
  --bg-2:                #0F1115;

  /* Accent */
  --accent-color:  #00D4B8;
  --primary-color: #00D4B8;
  --accent-soft:   rgba(0, 212, 184, 0.12);
  --accent-glow:   rgba(0, 212, 184, 0.25);

  /* Borders */
  --border-color:  rgba(255, 255, 255, 0.06);
  --border-subtle: rgba(255, 255, 255, 0.12);

  /* Text */
  --text-light:     #F5F4F1;
  --text-secondary: #8B8F97;
  --text-muted:     #5C6068;

  /* Type families */
  --mono:  'Geist Mono', ui-monospace, monospace;
  --serif: 'Instrument Serif', Georgia, serif;

  /* Semantic colours (unchanged) */
  --secondary-color: #2080b9;
  --success-color:   #2ecc71;
  --warning-color:   #F0A560;
  --danger-color:    #e74c3c;
  --light-gray:      #14171C;

  /* Radii — aligned to landing */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Geist', system-ui, -apple-system, sans-serif;
    font-feature-settings: 'ss01', 'cv11';
    background-color: var(--background-dark);
    color: var(--text-light);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
    display: grid;
    grid-template-columns: 320px 1fr;
    grid-template-rows: auto auto 1fr auto;
    min-height: 100vh;
}

header {
    grid-column: 1 / -1;
    grid-row: 1;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 11, 13, 0.72);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    padding: 14px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-brand {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

header h1 {
    font-family: var(--mono);
    color: var(--accent-color);
    font-size: 20px;
    font-weight: 500;
    margin: 0;
    letter-spacing: -0.02em;
}

.header-tagline {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
}

header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.025) 0%, transparent 100%),
                var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
    overflow: hidden;
}

.upload-container {
    padding: 20px;
}

.file-input-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 15px;
}

input[type="file"] {
    display: none;
}

.file-label {
    background: var(--accent-color);
    color: #042520;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: 10px;
    font-family: 'Geist', system-ui, sans-serif;
    font-weight: 600;
    transition: background 0.2s, transform 0.15s;
    text-align: center;
}

.file-label:hover {
    background: #1FE3CB;
    transform: translateY(-1px);
}

#file-name {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 14px;
}

.primary-button {
    background: var(--accent-color);
    color: #042520;
    border: none;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'Geist', system-ui, sans-serif;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s, transform 0.15s;
    width: 100%;
}

.primary-button:hover {
    background: #1FE3CB;
    transform: translateY(-1px);
}

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

.spinner {
    border: 4px solid rgba(0, 212, 184, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-left-color: var(--accent-color);
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.sidebar {
    grid-row: 3;
    background-color: var(--background-card);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    overflow-y: auto;
}

.main-content {
    grid-row: 3;
    padding: 20px;
    overflow-y: auto;
}

.results-container {
    background-color: var(--background-card);
    border-radius: 8px;
    padding: 0;
    margin-bottom: 30px;
}

.results-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
}

@media (min-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1200px) {
    .results-grid {
        grid-template-columns: 3fr 2fr;
    }
}

.image-container {
    text-align: center;
    background-color: #131519;
    border-radius: 8px;
    overflow: visible;
    position: relative;
}

.image-wrapper {
    max-width: 100%;
    overflow: visible;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

#annotated-image {
    max-width: 100%;
    max-height: 85vh;
    display: block;
    margin: 0 auto;
    image-rendering: auto;
    -webkit-image-rendering: auto;
}

.predictions-container {
    padding: 0;
}

.prediction-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 12px 15px;
    margin-bottom: 8px;
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.condition-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--accent-color);
    color: var(--background-dark);
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    margin-right: 10px;
    font-weight: bold;
    font-size: 12px;
    z-index: 1;
}

.condition {
    font-weight: bold;
    z-index: 1;
    flex-grow: 1;
}

.probability {
    font-weight: bold;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
}

.probability-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: rgba(0, 212, 184, 0.1);
    border-radius: 4px;
    z-index: 0;
}

.high-confidence .probability-bar {
    background-color: rgba(46, 204, 113, 0.1);
}

.medium-confidence .probability-bar {
    background-color: rgba(52, 152, 219, 0.1);
}

.low-confidence .probability-bar {
    background-color: rgba(231, 76, 60, 0.1);
}

#prediction-chart {
    margin-bottom: 20px;
    max-height: 300px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 10px;
}

.details-toggle {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    margin-top: 8px;
    width: 100%;
    flex-basis: 100%;
    text-align: left;
    z-index: 1;
    position: relative;
}

.details-panel {
    margin-top: 8px;
    padding: 14px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    font-size: 13px;
    line-height: 1.6;
    border-left: 3px solid var(--accent-color);
    width: 100%;
    flex-basis: 100%;
    z-index: 1;
    position: relative;
}

.details-panel p {
    margin-bottom: 8px;
}

.details-panel strong {
    color: var(--accent-color);
}

.ai-report-container {
    margin-top: 20px;
    padding: 20px;
    background-color: rgba(0, 212, 184, 0.05);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.ai-report {
    font-size: 14px;
    line-height: 1.6;
}

.ai-report h1, .ai-report h2, .ai-report h3 {
    color: var(--accent-color);
    margin-top: 15px;
    margin-bottom: 10px;
}

.ai-report ul, .ai-report ol {
    padding-left: 20px;
    margin-bottom: 15px;
}

.ai-report p {
    margin-bottom: 10px;
}

footer {
    grid-column: 1 / -1;
    grid-row: 4;
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 12px;
}

/* Feedback System Styles */
.feedback-container {
    margin-top: 30px;
    padding: 20px;
    background-color: rgba(0, 212, 184, 0.05);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.feedback-item {
    margin-bottom: 15px;
    padding: 12px;
    border-radius: 8px;
    background-color: rgba(0, 0, 0, 0.2);
    position: relative;
}

.feedback-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.feedback-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 15px;
}

.correction-options {
    margin-top: 10px;
}

.condition-select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--background-dark);
    color: var(--text-light);
    width: 100%;
}

.secondary-button {
    background: transparent;
    color: var(--text-light);
    border: 1px solid var(--border-subtle);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'Geist', system-ui, sans-serif;
    font-weight: 500;
    font-size: 14px;
    transition: border-color 0.2s, background 0.2s;
}

.secondary-button:hover {
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.04);
}

.remove-btn {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.new-condition {
    border-left: 3px solid #27ae60;
}

/* Tabs styling */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
}

.tab {
    padding: 10px 15px;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.tab-content {
    display: none;
}

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

/* Admin dashboard styles */
.feedback-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feedback-entry {
    padding: 20px;
}

.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 15px;
}

.original, .corrected {
    padding: 15px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.corrected {
    background-color: rgba(0, 212, 184, 0.05);
}

@media (max-width: 768px) {
    .comparison {
        grid-template-columns: 1fr;
    }
}

/* Metrics section */
.metrics {
    display: flex;
    justify-content: space-between;
    background-color: var(--background-card);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.metric {
    text-align: center;
    flex: 1;
}

.metric-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-color);
}

.metric-label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Confidence threshold slider */
.threshold-container {
    background-color: var(--background-card);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.threshold-slider {
    width: 100%;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    margin: 10px 0;
}

.threshold-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
}

.threshold-value {
    color: var(--accent-color);
    font-weight: bold;
}
/* Loading state for image container */
.loading-image {
    position: relative;
}

.loading-image::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.loading-image::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 212, 184, 0.1);
    border-radius: 50%;
    border-left-color: var(--accent-color);
    animation: spin 1s linear infinite;
    z-index: 11;
}

/* Cache management for images */
#annotated-image {
    transition: opacity 0.3s ease;
}

#annotated-image.loading {
    opacity: 0.5;
}

/* Added styles for prediction items to better show threshold effects */
.prediction-item[style*="display: none"] + .prediction-item {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.prediction-item {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.prediction-item.fading {
    opacity: 0.5;
    transform: translateX(-10px);
}

.view-toggle-container {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.clean-view-toggle {
    background-color: rgba(0, 212, 184, 0.8);
    color: var(--background-dark);
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.clean-view-toggle:hover {
    background-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.4);
}

.image-container:hover .view-toggle-container {
    opacity: 1;
}

/* Semi-transparent until hover */
.view-toggle-container {
    opacity: 0.7;
}

/* Loading animation for image transitions */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.6; }
    100% { opacity: 1; }
}

.annotated-image.loading {
    animation: pulse 1s infinite;
}

/* Tooth number label styles */
.tooth-number {
    font-size: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 1px 3px;
    border-radius: 2px;
    position: absolute;
}

/* Add styles for the small teeth icons */
.tooth-icon {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(0, 212, 184, 0.7);
    border-radius: 50%;
}

/* Add to your style.css file */

.view-toggle-container {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.clean-view-toggle {
    background-color: rgba(0, 212, 184, 0.8);
    color: #242a33;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.clean-view-toggle:hover {
    background-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.4);
}

/* Grayscale effect for the clean view */
.image-container.clean-view-mode .image-wrapper img {
    filter: contrast(120%);
    transition: filter 0.3s ease;
}

/* Smooth transitions */
.deficiency-overlay {
    transition: opacity 0.3s ease;
}

.clean-view-mode .deficiency-overlay {
    opacity: 0 !important;
}

/* CSS for tooth numbers */
.tooth-number {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 1px 3px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: bold;
    z-index: 100;
}

/* Make the tooth numbers pop more in clean view mode */
.clean-view-mode .tooth-number {
    background-color: rgba(0, 212, 184, 0.8);
    color: #242a33;
    transform: scale(1.1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
/* Add to your style.css file */

.loading-indicator {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    border-radius: 8px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 212, 184, 0.2);
    border-radius: 50%;
    border-left-color: var(--accent-color);
    animation: spin 1s linear infinite;
}

.loading-text {
    color: white;
    margin-top: 10px;
    font-size: 14px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Export button styles */
.export-button {
    background-color: var(--accent-color);
    color: var(--background-dark);
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 12px;
    transition: background-color 0.2s;
}

.export-button:hover {
    background-color: #00c4ae;
}

.pdf-button {
    background-color: #e74c3c;
    color: white;
}

.pdf-button:hover {
    background-color: #c0392b;
}

/* Side by side comparison */
.comparison-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.comparison-image {
    text-align: center;
}

.comparison-image h4 {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: 14px;
}

.comparison-image img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.view-mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    justify-content: center;
}

.view-mode-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.view-mode-btn.active {
    background-color: var(--accent-color);
    color: var(--background-dark);
    border-color: var(--accent-color);
}

.view-mode-btn:hover {
    border-color: var(--accent-color);
}

/* Analysis Mode Toggle (ML vs Vision) */
/* Interactive hover overlays on annotated image */
.bbox-overlay {
    position: absolute;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
    z-index: 5;
    pointer-events: auto;
}

.bbox-overlay:hover,
.bbox-overlay.highlight {
    background-color: rgba(0, 212, 184, 0.15);
    border-color: var(--accent-color);
}

.bbox-tooltip {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(26, 30, 36, 0.95);
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
    border: 1px solid var(--accent-color);
    z-index: 20;
}

.bbox-overlay:hover .bbox-tooltip,
.bbox-overlay.highlight .bbox-tooltip {
    opacity: 1;
}

.bbox-tooltip .tooltip-condition {
    font-weight: 600;
    color: var(--accent-color);
}

.bbox-tooltip .tooltip-teeth {
    color: var(--text-secondary);
    margin-left: 6px;
}

.bbox-tooltip .tooltip-conf {
    margin-left: 6px;
    opacity: 0.8;
}

/* Sidebar prediction item highlight when hovering overlay */
.prediction-item.hover-highlight {
    background-color: rgba(0, 212, 184, 0.15);
    outline: 1px solid var(--accent-color);
}

/* Pipeline badge */
.pipeline-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 6px;
    vertical-align: middle;
}

.pipeline-badge.yolo {
    background-color: rgba(0, 212, 184, 0.2);
    color: var(--accent-color);
}

.pipeline-badge.biomedclip {
    background-color: rgba(102, 126, 234, 0.2);
    color: #667eea;
}

.pipeline-badge.claude {
    background-color: rgba(118, 75, 162, 0.2);
    color: #b07ee8;
}

/* Treatment Plan Section */
.treatment-plan-container {
    margin-top: 20px;
    padding: 20px;
    background-color: rgba(52, 152, 219, 0.05);
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.treatment-plan-container h3 {
    color: #3498db;
    margin-bottom: 16px;
}

.treatment-item {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
}

.treatment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.urgency-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.treatment-condition {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-light);
}

.treatment-teeth {
    color: var(--text-secondary);
    font-size: 13px;
}

.treatment-conf {
    margin-left: auto;
    background: rgba(255,255,255,0.1);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.treatment-codes {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

.code-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    font-family: 'Menlo', 'Consolas', monospace;
}

.code-badge.icd10 {
    background: rgba(155, 89, 182, 0.2);
    color: #b07ee8;
    border: 1px solid rgba(155, 89, 182, 0.3);
}

.code-badge.ada {
    background: rgba(0, 212, 184, 0.15);
    color: var(--accent-color);
    border: 1px solid rgba(0, 212, 184, 0.3);
}

.treatment-recs {
    padding-left: 20px;
    margin: 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.treatment-recs li {
    margin-bottom: 2px;
}

.treatment-followup {
    font-size: 12px;
    color: var(--text-secondary);
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
}

.treatment-followup strong {
    color: #f39c12;
}

/* BiomedCLIP suggestion in prediction item */
.biomedclip-suggestion {
    width: 100%;
    flex-basis: 100%;
    font-size: 11px;
    color: #667eea;
    margin-top: 4px;
    padding: 2px 0;
}

/* Progress bar for async analysis */
.progress-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding: 30px;
}

.progress-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.progress-header p {
    margin: 0;
    font-size: 16px;
    color: #e0e0e0;
}

.progress-bar-track {
    width: 100%;
    height: 8px;
    background: #2a3040;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #00b4d8);
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-details {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: #8892a0;
    margin-bottom: 16px;
}

.progress-stages {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.stage-badge {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stage-badge.completed {
    background: rgba(0, 212, 184, 0.15);
    color: var(--accent-color);
    border: 1px solid rgba(0, 212, 184, 0.3);
}

.stage-badge.active {
    background: rgba(0, 180, 216, 0.15);
    color: #00b4d8;
    border: 1px solid rgba(0, 180, 216, 0.3);
    animation: pulse-badge 1.5s infinite;
}

@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Batch upload */
.batch-count {
    display: block;
    color: var(--accent-color);
    font-size: 13px;
    margin: 8px 0;
    font-weight: 600;
}

.batch-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 12px;
    background: #242a33;
    border-radius: 8px;
    margin-bottom: 16px;
}

.batch-nav-btn {
    background: var(--accent-color);
    color: #1a1f26;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: opacity 0.2s;
}

.batch-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.batch-nav-info {
    color: #e0e0e0;
    font-size: 14px;
    font-weight: 600;
}

/* ROI Drawing Mode */
.roi-drawing-active .image-wrapper,
.pin-describe-active .image-wrapper {
    cursor: crosshair !important;
    touch-action: none;
}

.roi-drawing-active .image-wrapper img,
.pin-describe-active .image-wrapper img {
    cursor: crosshair !important;
    touch-action: none;
}

.roi-selection-box {
    position: absolute;
    border: 2px dashed var(--accent-color);
    background: rgba(0, 212, 184, 0.15);
    z-index: 20;
    pointer-events: none;
}

.roi-draw-prompt {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 212, 184, 0.9);
    color: #1a1f26;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13px;
    z-index: 25;
    white-space: nowrap;
    animation: pulse-badge 1.5s infinite;
}

.roi-condition-picker {
    position: absolute;
    background: #242a33;
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 12px;
    z-index: 30;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    min-width: 200px;
}

.roi-condition-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
    max-height: 180px;
    overflow-y: auto;
}

.roi-condition-option {
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid #3a4050;
    background: #1a1f26;
    color: #e0e0e0;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.roi-condition-option:hover {
    border-color: var(--accent-color);
    color: #fff;
}

.roi-condition-option.selected {
    background: var(--accent-color);
    color: #1a1f26;
    border-color: var(--accent-color);
    font-weight: 700;
}

.roi-condition-picker .roi-picker-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.roi-condition-picker button.roi-picker-confirm,
.roi-condition-picker button.roi-picker-cancel {
    padding: 6px 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 12px;
}

.roi-picker-confirm {
    background: var(--accent-color);
    color: #1a1f26;
}

.roi-picker-cancel {
    background: #3a4050;
    color: #e0e0e0;
}

/* Click-to-describe mode */
.pin-describe-active .image-wrapper {
    cursor: crosshair !important;
}

.pin-marker {
    position: absolute;
    width: 24px;
    height: 24px;
    margin-left: -12px;
    margin-top: -24px;
    z-index: 20;
    pointer-events: none;
    color: var(--accent-color);
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.6));
}

.pin-describe-popup {
    position: absolute;
    background: #242a33;
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 12px;
    z-index: 30;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    min-width: 240px;
    max-width: 320px;
}

.pin-describe-popup select {
    width: 100%;
    padding: 6px 8px;
    border-radius: 4px;
    border: 1px solid #3a4050;
    background: #1a1f26;
    color: #e0e0e0;
    font-size: 13px;
    margin-bottom: 8px;
}

.pin-describe-popup textarea {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #3a4050;
    background: #1a1f26;
    color: #e0e0e0;
    font-size: 13px;
    resize: vertical;
    min-height: 60px;
    margin-bottom: 8px;
    font-family: inherit;
}

.pin-describe-popup .pin-popup-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.pin-describe-popup button {
    padding: 6px 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 12px;
}

.pin-describe-popup .pin-popup-confirm {
    background: var(--accent-color);
    color: #1a1f26;
}

.pin-describe-popup .pin-popup-cancel {
    background: #3a4050;
    color: #e0e0e0;
}

/* ========== Header Controls ========== */
.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    padding: 2px;
}

.lang-btn {
    font-family: var(--mono);
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 3px 10px;
    border-radius: 100px;
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: color 0.15s, background 0.15s;
}

.lang-btn.active {
    background: rgba(255, 255, 255, 0.10);
    color: var(--text-light);
}

.lang-divider {
    display: none;
}

/* ========== Navigation Bar ========== */
.main-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    display: flex;
    background: var(--background-card);
    border-bottom: 1px solid var(--border-color);
    padding: 6px 16px;
    gap: 4px;
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    padding: 6px 18px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s, border-color 0.15s;
    letter-spacing: 0.01em;
}

.nav-btn.active {
    color: var(--accent-color);
    background: var(--accent-soft);
    border-color: var(--accent-glow);
}

.nav-btn:hover:not(.active) {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
}

.mode-container {
    display: none;
}

.mode-container.active {
    display: contents;
}

#mode-learn,
#mode-quiz,
#mode-assess,
#mode-admin {
    grid-column: 1 / -1;
    grid-row: 3;
}

#mode-learn.active,
#mode-quiz.active,
#mode-assess.active,
#mode-admin.active {
    display: block;
}


/* ========== Disclaimer Modal ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    max-width: 480px;
    width: 90%;
    text-align: center;
}

.modal-content h2 {
    color: var(--accent-color);
    margin-bottom: 16px;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.modal-content .primary-button {
    width: auto;
    padding: 12px 32px;
}

/* ========== Pediatric Warning ========== */
.pediatric-toggle {
    margin: 12px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 16px;
    height: 16px;
}

.pediatric-warning {
    background: rgba(243, 156, 18, 0.15);
    border: 1px solid var(--warning-color);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--warning-color);
}

.warning-icon {
    font-size: 18px;
}

/* ========== Error Modal ========== */
.error-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--background-card);
    border: 2px solid var(--danger-color);
    border-radius: 8px;
    padding: 20px;
    max-width: 400px;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.error-modal h3 {
    color: var(--danger-color);
    margin-top: 0;
    margin-bottom: 10px;
}

.error-modal p {
    color: var(--text-light);
    margin: 15px 0;
}

.error-modal button {
    background-color: var(--danger-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

/* ========== Toast Notifications ========== */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.visible {
    transform: translateY(0);
    opacity: 1;
}

.toast-info { background: var(--secondary-color); }
.toast-success { background: var(--success-color); }
.toast-error { background: var(--danger-color); }

/* ========== Study Panels ========== */
.study-panel {
    margin-top: 8px;
    width: 100%;
    flex-basis: 100%;
}

.study-toggle {
    width: 100%;
    background: rgba(0, 212, 184, 0.1);
    border: 1px solid rgba(0, 212, 184, 0.3);
    color: var(--accent-color);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    text-align: left;
    transition: all 0.2s;
}

.study-toggle.expanded {
    border-radius: 4px 4px 0 0;
}

.study-toggle:hover {
    background: rgba(0, 212, 184, 0.15);
}

.study-content {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 212, 184, 0.2);
    border-top: none;
    border-radius: 0 0 4px 4px;
    padding: 12px;
}

.study-section {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.study-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.study-section h5 {
    color: var(--accent-color);
    font-size: 12px;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.study-section p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.clinical-pearls {
    background: rgba(243, 156, 18, 0.1);
    border-radius: 4px;
    padding: 8px 12px !important;
}

/* ========== Treatment WHO Source ========== */
.treatment-source {
    font-size: 11px;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 6px;
    opacity: 0.8;
}

/* ========== Learn Mode ========== */
.learn-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 24px;
}

.learn-hero {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px 32px;
    background: linear-gradient(135deg, rgba(0, 212, 184, 0.06) 0%, rgba(32, 128, 185, 0.06) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 212, 184, 0.1);
}

.learn-hero-icon {
    color: var(--accent-color);
    margin-bottom: 16px;
    opacity: 0.8;
}

.learn-hero h2 {
    color: var(--text-light);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.learn-container h2 {
    color: var(--accent-color);
    margin-bottom: 8px;
}

.learn-subtitle {
    color: var(--text-secondary);
    margin-bottom: 0;
    font-size: 15px;
    max-width: 600px;
    margin: 0 auto 20px;
    line-height: 1.6;
}

.learn-search-bar {
    max-width: 420px;
    margin: 0 auto;
}

.learn-search-input {
    width: 100%;
    padding: 12px 18px;
    background: var(--background-dark);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    color: var(--text-light);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

/* ===== Unified input focus styles ===== */
input[type="text"]:focus,
input[type="email"]:focus,
input[type="search"]:focus,
input[type="number"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-soft);
    outline: none;
}

.learn-search-input::placeholder {
    color: var(--text-muted);
}

/* Loading skeleton */
.learn-loading-skeleton {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skeleton-domain {
    height: 200px;
    background: linear-gradient(90deg, var(--background-card) 25%, var(--background-elevated) 50%, var(--background-card) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.learn-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.025) 0%, transparent 100%),
                var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.learn-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-color);
    opacity: 0;
    transition: opacity 0.25s;
}

.learn-card:hover::before {
    opacity: 1;
}

.learn-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.learn-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.learn-card-preview {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 12px;
    margin-bottom: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.learn-card:hover {
    border-color: rgba(0, 212, 184, 0.18);
    box-shadow: 0 0 0 1px rgba(0, 212, 184, 0.15),
                0 4px 20px rgba(0, 212, 184, 0.08);
}

.learn-card h4 {
    color: var(--text-light);
    font-size: 14px;
    margin: 0;
    font-weight: 600;
}

.learn-card.expanded {
    grid-column: 1 / -1;
    border-color: var(--accent-color);
    background: rgba(0, 212, 184, 0.02);
    cursor: default;
    box-shadow: 0 4px 24px rgba(0, 212, 184, 0.06);
    transform: none;
}

.learn-card.expanded::before { opacity: 1; }
.learn-card.expanded .learn-card-preview { display: none; }

.learn-card.expanded h4 {
    color: var(--accent-color);
    font-size: 18px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.learn-card-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 24px;
}

.learn-card-content p {
    margin-bottom: 8px;
}

.learn-card-content strong {
    color: var(--accent-color);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 4px;
}

.learn-section {
    margin-bottom: 0;
    padding: 14px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--border-color);
}

.learn-section p {
    margin: 4px 0;
}

.learn-section em {
    color: var(--accent-color);
}

.learn-section h5 {
    color: var(--text-light);
    font-size: 13px;
    font-weight: 600;
    margin: 0 0 8px 0;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.learn-latin-name {
    grid-column: 1 / -1;
    color: var(--text-muted);
    font-size: 13px;
    font-style: italic;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 4px;
}

.who-section {
    grid-column: 1 / -1;
    background: rgba(52, 152, 219, 0.08);
    border-radius: var(--radius-sm);
    padding: 16px;
    border-left: 3px solid #3498db;
}

.clinical-pearls {
    grid-column: 1 / -1;
    border-left-color: var(--warning-color);
    background: rgba(243, 156, 18, 0.05);
}

.urgency-badge-inline {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
}

.urgency-badge-inline.urgency-immediate { background: #e74c3c; color: #fff; }
.urgency-badge-inline.urgency-soon { background: #f39c12; color: #1a1e24; }
.urgency-badge-inline.urgency-routine { background: #3498db; color: #fff; }
.urgency-badge-inline.urgency-monitor { background: #2ecc71; color: #1a1e24; }

.learn-no-results {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 15px;
}

/* ========== Quiz Mode ========== */
.quiz-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 24px;
}

.quiz-hero {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.quiz-hero h2 {
    color: var(--text-light);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 10px;
}

.quiz-instructions {
    color: var(--text-secondary);
    font-size: 15px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.quiz-score-bar {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-color);
    padding: 10px;
    background: var(--accent-glow);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.quiz-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.quiz-image-area .image-container {
    background: #0a0d12;
    border-radius: var(--radius-md);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    position: relative;
}

.quiz-image-placeholder {
    color: var(--text-muted);
    text-align: center;
    padding: 40px;
    font-size: 15px;
}

#quiz-image {
    max-width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-md);
    image-rendering: auto;
    -webkit-image-rendering: auto;
}

#quiz-image[src=""] { display: none; }
#quiz-image[src=""]+.quiz-image-placeholder { display: block; }
#quiz-image:not([src=""])+.quiz-image-placeholder { display: none; }

.quiz-answer-area {
    background: var(--background-card);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.quiz-answer-title {
    color: var(--text-light);
    font-size: 17px;
    margin-bottom: 6px;
}

.quiz-answer-hint {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 16px;
}

.quiz-condition-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin: 0 0 16px 0;
    max-height: 380px;
    overflow-y: auto;
    padding-right: 4px;
}

.quiz-condition-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%),
                var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    min-height: 44px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.quiz-condition-option:hover {
    border-color: rgba(0, 212, 184, 0.18);
    box-shadow: 0 0 0 1px rgba(0, 212, 184, 0.12);
}

.quiz-condition-option input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.quiz-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

.quiz-actions .primary-button,
.quiz-actions .secondary-button {
    flex: 1;
}

.quiz-results {
    margin-top: 24px;
    padding: 24px;
    background: var(--background-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.quiz-score-display {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.quiz-score-display .metric-value {
    font-size: 48px;
}

.quiz-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.quiz-found, .quiz-missed, .quiz-wrong {
    padding: 14px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.15);
}

.quiz-found h4, .quiz-missed h4, .quiz-wrong h4 {
    margin-bottom: 10px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quiz-found h4 { color: var(--success-color); }
.quiz-missed h4 { color: var(--danger-color); }
.quiz-wrong h4 { color: var(--warning-color); }

.quiz-tag {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 13px;
    margin: 3px;
    font-weight: 500;
}

.quiz-tag.correct {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success-color);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.quiz-tag.missed {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger-color);
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.quiz-tag.wrong {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warning-color);
    border: 1px solid rgba(243, 156, 18, 0.3);
}

/* ========== Mobile Hamburger Menu ========== */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 4px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    transition: transform 0.3s;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
}

/* ========== Mobile Responsive ========== */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }

    .menu-toggle {
        display: flex;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -320px;
        width: 320px;
        height: 100%;
        z-index: 999;
        transition: left 0.3s ease;
        overflow-y: auto;
        padding-top: 60px;
        background: var(--background-card);
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .metrics {
        flex-direction: column;
        gap: 8px;
    }

    .comparison-container {
        grid-template-columns: 1fr;
    }

    .tooth-number {
        font-size: 14px;
        padding: 2px 5px;
    }

    .prediction-item {
        min-height: 48px;
    }

    .threshold-slider::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    .primary-button, .secondary-button, .export-button {
        min-height: 44px;
        min-width: 44px;
    }

    .tabs .tab {
        flex: 1;
        text-align: center;
        padding: 12px;
        font-size: 14px;
    }

    .main-nav {
        overflow-x: auto;
    }

    .nav-btn {
        flex: 1;
        text-align: center;
        padding: 10px 12px;
        font-size: 13px;
        white-space: nowrap;
    }

    .quiz-content {
        grid-template-columns: 1fr;
    }

    .quiz-comparison {
        grid-template-columns: 1fr;
    }

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

    .learn-domain-grid {
        grid-template-columns: 1fr;
    }

    .learn-card-content {
        grid-template-columns: 1fr;
    }

    .learn-hero {
        padding: 24px 16px 20px;
    }

    header h1 {
        font-size: 14px;
    }

    .header-tagline {
        display: none;
    }

    .assess-workspace {
        grid-template-columns: 1fr !important;
    }

    .assess-compare-grid {
        grid-template-columns: 1fr !important;
    }

    .assess-steps-preview {
        flex-direction: column;
    }

    .image-container {
        touch-action: manipulation;
    }

    #annotated-image,
    #quiz-image {
        touch-action: manipulation;
    }

    /* Assessment drawing mode needs touch-action: none to allow drag-to-draw on mobile */
    .assess-image-area .image-container,
    .assess-image-area img {
        touch-action: none;
    }

    /* ROI / pin-describe drawing modes also need touch-action: none on mobile */
    .roi-drawing-active .image-container,
    .roi-drawing-active .image-container img,
    .pin-describe-active .image-container,
    .pin-describe-active .image-container img {
        touch-action: none;
    }
}

/* ========== Assessment Mode ========== */
.assess-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.assess-intro {
    text-align: center;
    max-width: 750px;
    margin: 30px auto;
}

.assess-intro h2 {
    color: var(--text-light);
    margin-bottom: 12px;
    font-size: 26px;
    font-weight: 700;
}

.assess-description {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
    font-size: 15px;
}

.assess-intro p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.assess-steps-preview {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 36px;
}

.step-preview {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    background: var(--background-card);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    min-width: 180px;
    text-align: left;
}

.step-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.step-text strong {
    color: var(--text-light);
    font-size: 14px;
}

.step-text small {
    color: var(--text-muted);
    font-size: 12px;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-color);
    color: var(--background-dark);
    border-radius: 50%;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.assess-tool-bar {
    margin-bottom: 16px;
}

.assess-tool-toggle {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.assess-tool-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}

.assess-tool-btn:hover {
    border-color: var(--accent-color);
    color: var(--text-light);
}

.assess-tool-btn.active {
    background: rgba(0, 212, 184, 0.12);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.assess-tool-hint {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(0, 212, 184, 0.06);
    border: 1px solid rgba(0, 212, 184, 0.15);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
}

/* Assessment pin-describe marker & popup */
.assess-pin-marker {
    position: absolute;
    width: 24px;
    height: 32px;
    margin-left: -12px;
    margin-top: -32px;
    color: var(--accent-color);
    filter: drop-shadow(0 2px 3px rgba(0,0,0,0.5));
    z-index: 12;
    pointer-events: auto;
}

.assess-pin-label {
    position: absolute;
    left: 28px;
    top: 4px;
    white-space: nowrap;
    font-size: 11px;
    background: rgba(0, 212, 184, 0.15);
    color: var(--accent-color);
    padding: 2px 6px;
    border-radius: 3px;
    pointer-events: none;
}

.assess-pin-marker .assess-roi-remove {
    position: absolute;
    top: -6px;
    right: -10px;
    width: 18px;
    height: 18px;
    font-size: 12px;
    line-height: 18px;
    text-align: center;
    padding: 0;
}

.assess-pin-popup {
    position: absolute;
    background: #242a33;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    z-index: 20;
    min-width: 240px;
    max-width: 280px;
}

.assess-pin-popup select {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: #1a1f26;
    color: var(--text-light);
    font-size: 13px;
    margin-bottom: 8px;
}

.assess-pin-popup textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: #1a1f26;
    color: var(--text-light);
    font-size: 13px;
    resize: vertical;
    min-height: 50px;
    margin-bottom: 8px;
    font-family: inherit;
}

.assess-pin-popup .pin-popup-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.assess-pin-popup button {
    padding: 6px 12px;
    border-radius: 4px;
    border: none;
    font-size: 13px;
    cursor: pointer;
}

.assess-pin-popup .pin-popup-confirm {
    background: var(--accent-color);
    color: #1a1f26;
}

.assess-pin-popup .pin-popup-cancel {
    background: #3a4050;
    color: #e0e0e0;
}

.hint-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color);
    color: var(--background-dark);
    font-weight: 700;
    font-size: 12px;
    flex-shrink: 0;
}

.assess-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.assess-header-bar h3 {
    color: var(--accent-color);
    font-size: 18px;
}

.assess-timer {
    font-family: 'Menlo', 'Consolas', monospace;
    font-size: 18px;
    color: var(--accent-color);
    background: rgba(0, 212, 184, 0.1);
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid rgba(0, 212, 184, 0.3);
}

.assess-workspace {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 20px;
    align-items: start;
}

.assess-image-area .image-container {
    background: #131519;
    border-radius: 8px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.assess-image-area .image-wrapper {
    cursor: crosshair;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

#assess-image {
    max-width: 100%;
    max-height: 85vh;
    display: block;
    margin: 0 auto;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

.assess-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 8px;
    font-style: italic;
}

.assess-findings-panel {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.assess-findings-panel h4 {
    color: var(--accent-color);
    margin-bottom: 12px;
    font-size: 15px;
}

.assess-findings-list {
    min-height: 100px;
    margin-bottom: 16px;
}

.assess-empty-msg {
    color: var(--text-secondary);
    font-size: 13px;
    font-style: italic;
    text-align: center;
    padding: 20px 0;
}

.assess-finding-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    margin-bottom: 6px;
}

.assess-finding-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: var(--accent-color);
    color: var(--background-dark);
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.assess-finding-name {
    font-size: 14px;
    color: var(--text-light);
}

.assess-submit-area {
    margin-top: 12px;
}

/* ROI drawing overlays */
.assess-roi {
    position: absolute;
    border: 2px dashed var(--accent-color);
    background: rgba(0, 212, 184, 0.12);
    z-index: 10;
}

.assess-roi.drawing {
    pointer-events: none;
}

.assess-roi.confirmed {
    border-style: solid;
    border-color: var(--accent-color);
    background: rgba(0, 212, 184, 0.08);
}

.assess-roi-label {
    position: absolute;
    top: -20px;
    left: 0;
    background: var(--accent-color);
    color: var(--background-dark);
    font-size: 11px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 3px;
    white-space: nowrap;
}

.assess-roi-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--danger-color);
    color: white;
    border: none;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    z-index: 15;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Condition picker inside ROI */
.assess-condition-picker {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background: var(--background-card);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 10px;
    z-index: 30;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    min-width: 220px;
    max-width: 320px;
}

.assess-picker-options {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 10px;
    max-height: 180px;
    overflow-y: auto;
}

.assess-picker-opt {
    padding: 5px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--background-dark);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s;
}

.assess-picker-opt:hover {
    border-color: var(--accent-color);
    color: var(--text-light);
}

.assess-picker-opt.selected {
    background: var(--accent-color);
    color: var(--background-dark);
    border-color: var(--accent-color);
    font-weight: 700;
}

.assess-picker-btns {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.assess-picker-btns button {
    padding: 5px 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 12px;
}

.assess-picker-cancel {
    background: var(--border-color);
    color: var(--text-secondary);
}

.assess-picker-confirm {
    background: var(--accent-color);
    color: var(--background-dark);
}

/* Comparison view */
.assess-score-banner {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 20px;
    background: var(--background-card);
    border-radius: 8px;
    margin-bottom: 20px;
}

.assess-score-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--background-dark);
    background: var(--accent-color);
    flex-shrink: 0;
}

.assess-score-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.score-stat {
    color: var(--text-secondary);
    font-size: 14px;
}

.score-stat strong {
    color: var(--text-light);
}

.assess-compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.assess-compare-col h4 {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: 15px;
    text-align: center;
}

.assess-compare-col .image-container {
    background: #131519;
    border-radius: 8px;
    margin-bottom: 12px;
}

.assess-compare-col .image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.assess-compare-col img {
    max-width: 100%;
    max-height: 50vh;
    display: block;
}

.assess-condition-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.assess-cond-tag {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.assess-cond-tag.correct {
    background: rgba(46, 204, 113, 0.2);
    color: var(--success-color);
    border: 1px solid rgba(46, 204, 113, 0.4);
}

.assess-cond-tag.wrong {
    background: rgba(243, 156, 18, 0.2);
    color: var(--warning-color);
    border: 1px solid rgba(243, 156, 18, 0.4);
}

.assess-cond-tag.missed {
    background: rgba(231, 76, 60, 0.2);
    color: var(--danger-color);
    border: 1px solid rgba(231, 76, 60, 0.4);
}

/* Overlays on comparison images */
.assess-overlay {
    position: absolute;
    border: 2px solid;
    border-radius: 2px;
    z-index: 5;
    pointer-events: none;
}

.assess-overlay.match {
    border-color: var(--success-color);
    background: rgba(46, 204, 113, 0.15);
}

.assess-overlay.missed {
    border-color: var(--danger-color);
    background: rgba(231, 76, 60, 0.15);
}

.assess-overlay.fp {
    border-color: var(--warning-color);
    background: rgba(243, 156, 18, 0.15);
}

/* Missed conditions feedback */
.assess-feedback-detail {
    padding: 20px;
    background: rgba(231, 76, 60, 0.05);
    border-radius: 8px;
    border-left: 4px solid var(--danger-color);
}

.assess-feedback-detail h4 {
    color: var(--danger-color);
    margin-bottom: 12px;
}

.assess-missed-item {
    margin-bottom: 12px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

.assess-missed-item strong {
    color: var(--text-light);
}

.assess-missed-item p {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 4px;
}

.assess-perfect {
    text-align: center;
    color: var(--success-color);
    font-size: 18px;
    font-weight: 600;
    padding: 20px;
}

/* History section */
.assess-history {
    margin-top: 32px;
    text-align: left;
}

.assess-history h4 {
    color: var(--accent-color);
    margin-bottom: 12px;
}

.assess-history-summary {
    display: flex;
    gap: 24px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.assess-history-summary strong {
    color: var(--text-light);
}

.assess-history-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.assess-history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
    font-size: 13px;
}

.assess-hist-score {
    font-weight: 700;
    min-width: 40px;
}

.assess-hist-score.good { color: var(--success-color); }
.assess-hist-score.fair { color: var(--warning-color); }
.assess-hist-score.poor { color: var(--danger-color); }

.assess-hist-meta {
    color: var(--text-secondary);
    flex: 1;
}

.assess-hist-date {
    color: var(--text-secondary);
    font-size: 12px;
    opacity: 0.7;
}

/* Auth UI */
.auth-user-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}
.auth-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}
.auth-name {
    color: #e0e0e0;
    font-size: 0.85rem;
}
.auth-btn {
    font-family: 'Geist', system-ui, sans-serif;
    background: transparent;
    color: var(--text-light);
    border: 1px solid var(--border-subtle);
    padding: 5px 13px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    transition: border-color 0.15s, background 0.15s;
}
.auth-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.22);
}
.auth-sign-in-btn {
    margin-left: 8px;
}
.auth-gate {
    text-align: center;
    padding: 30px 20px;
    color: #aaa;
}
.auth-gate p {
    margin-bottom: 16px;
    font-size: 1rem;
}
.auth-gate-btn {
    font-size: 1rem;
}

/* ─── Mode Toggle Pills ─── */
.quiz-mode-toggle, .assess-mode-toggle {
    display: flex;
    gap: 0;
    margin-bottom: 1rem;
    border-radius: var(--radius-md, 8px);
    overflow: hidden;
    border: 1px solid var(--border-color, #2a3441);
    width: fit-content;
}

.mode-pill {
    padding: 0.5rem 1.2rem;
    background: var(--background-card, #1a2028);
    color: var(--text-muted, #5a6370);
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
}

.mode-pill.active {
    background: var(--accent-color, var(--accent-color));
    color: var(--background-dark, #0f1419);
}

.mode-pill:hover:not(.active) {
    background: var(--background-elevated, #222b36);
    color: var(--text-color, #e0e0e0);
}

/* ─── Difficulty Badges ─── */
.difficulty-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-left: 0.5rem;
}

.difficulty-easy { background: #2ecc71; color: #1a1e24; }
.difficulty-medium { background: #f39c12; color: #1a1e24; }
.difficulty-hard { background: #e74c3c; color: #fff; }

.quiz-filters {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted, #5a6370);
}

.quiz-filters select {
    background: var(--background-card, #1a2028);
    color: var(--text-color, #e0e0e0);
    border: 1px solid var(--border-color, #2a3441);
    border-radius: var(--radius-sm, 4px);
    padding: 0.3rem 0.5rem;
    font-size: 0.85rem;
}

/* ─── Timer Display ─── */
#quiz-timer-display {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color, var(--accent-color));
    text-align: center;
    margin-bottom: 0.5rem;
}

/* ─── Learn Domain Sections ─── */
.learn-domains { display: flex; flex-direction: column; gap: 2rem; }

.learn-domain-section {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.learn-domain-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--background-elevated, #222b36);
    border-radius: var(--radius-md, 8px);
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.learn-domain-header:hover {
    background: rgba(0, 212, 184, 0.05);
}

.learn-domain-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--text-light);
    flex-shrink: 0;
}

.learn-domain-header h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-light);
    flex: 1;
    font-weight: 600;
}

.domain-badge {
    background: rgba(0, 212, 184, 0.15);
    color: var(--accent-color, var(--accent-color));
    border-radius: 12px;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.domain-collapse-btn {
    background: none;
    border: none;
    color: var(--text-muted, #5a6370);
    cursor: pointer;
    font-size: 0.8rem;
    transition: transform 0.2s;
}

.domain-collapse-btn[aria-expanded="false"] {
    transform: rotate(-90deg);
}

.learn-domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    padding: 1rem 0;
}

.learn-domain-grid.hidden {
    display: none;
}

/* ─── Study Feedback Panel ─── */
.study-feedback-panel {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--background-card, #1a2028);
    border: 1px solid var(--border-color, #2a3441);
    border-radius: var(--radius-md, 8px);
}

.study-explanation {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-sm, 4px);
    font-size: 0.9rem;
    line-height: 1.5;
}

.study-explanation.missed {
    background: rgba(231, 76, 60, 0.1);
    border-left: 3px solid #e74c3c;
}

.study-explanation.correct {
    background: rgba(46, 204, 113, 0.1);
    border-left: 3px solid #2ecc71;
}

/* ─── Exam Facts Callout ─── */
.exam-facts-callout {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 212, 184, 0.05);
    border: 1px solid rgba(0, 212, 184, 0.2);
    border-radius: var(--radius-md, 8px);
}

.exam-facts-callout h4, .exam-facts-callout h5 {
    color: var(--accent-color, var(--accent-color));
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
}

.exam-facts-condition {
    margin-bottom: 0.75rem;
}

.exam-facts-condition ul {
    margin: 0.25rem 0 0 1.5rem;
    padding: 0;
    font-size: 0.85rem;
    color: var(--text-color, #e0e0e0);
}

.exam-facts-condition li {
    margin-bottom: 0.2rem;
}

/* ─── Reference X-ray Images in Learn ─── */
.learn-ref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.learn-ref-thumb {
    border-radius: var(--radius-sm, 4px);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border-color, #2a3040);
    transition: border-color 0.2s;
}

.learn-ref-thumb:hover {
    border-color: var(--accent-color, var(--accent-color));
}

.learn-ref-thumb img {
    width: 100%;
    height: 100px;
    object-fit: cover;
    display: block;
}

.learn-ref-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    cursor: zoom-out;
}

.learn-ref-overlay img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md, 8px);
}

/* ─── AI Unavailable Notice ─── */
.ai-unavailable-notice {
    padding: 0.5rem 1rem;
    background: rgba(243, 156, 18, 0.1);
    border: 1px solid rgba(243, 156, 18, 0.3);
    border-radius: var(--radius-sm, 4px);
    color: #f39c12;
    font-size: 0.85rem;
    text-align: center;
}

/* ─── Session Summary ─── */
.session-summary-panel {
    margin-top: 1rem;
    padding: 1.5rem;
    background: var(--background-card, #1a2028);
    border: 1px solid var(--accent-color, var(--accent-color));
    border-radius: var(--radius-md, 8px);
}

.session-summary-panel h3 {
    color: var(--accent-color, var(--accent-color));
    margin: 0 0 1rem 0;
}

.summary-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.summary-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.summary-label {
    font-size: 0.8rem;
    color: var(--text-muted, #5a6370);
    text-transform: uppercase;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color, #e0e0e0);
}

/* ─── Quiz Clean View Button ─── */
.quiz-clean-view-btn {
    position: absolute;
    bottom: 12px;
    left: 12px;
    z-index: 10;
    background: rgba(0, 212, 184, 0.85);
    color: var(--background-dark);
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.quiz-clean-view-btn:hover {
    background: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ─── Quiz Result Tags ─── */
.quiz-results-group { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.quiz-tag {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}
.tag-correct { background: rgba(46, 204, 113, 0.2); color: #2ecc71; }
.tag-missed { background: rgba(231, 76, 60, 0.2); color: #e74c3c; }
.tag-wrong { background: rgba(243, 156, 18, 0.2); color: #f39c12; }

/* ─── Code Badges ─── */
.code-badge {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-size: 0.75rem;
    font-family: monospace;
}
.code-badge.nfz { background: rgba(0, 212, 184, 0.15); color: var(--accent-color, var(--accent-color)); }
.code-badge.ada { background: rgba(52, 152, 219, 0.15); color: #3498db; }

/* ─── Image Zoom / Pan / Fullscreen ─── */
#single-view {
    position: relative;
    overflow: hidden;
}

#single-view #annotated-image {
    transition: transform 0.1s ease-out;
    will-change: transform;
}

#single-view .image-wrapper {
    overflow: hidden;
}

.image-toolbar {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 4px 6px;
    z-index: 15;
    opacity: 0.85;
    transition: opacity 0.2s;
}

#single-view:hover .image-toolbar,
.image-fullscreen .image-toolbar {
    opacity: 1;
}

/* Zoom hint that appears briefly when image loads */
.zoom-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(8px);
    color: var(--text-light);
    padding: 10px 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-size: 13px;
    z-index: 20;
    pointer-events: none;
    opacity: 0;
    animation: zoomHintFade 3.5s ease-out forwards;
}

@keyframes zoomHintFade {
    0% { opacity: 0; }
    15% { opacity: 1; }
    70% { opacity: 1; }
    100% { opacity: 0; }
}

.img-tool-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 16px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.img-tool-btn:hover {
    background: var(--accent-glow);
    color: var(--accent-color);
}

.zoom-indicator {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    min-width: 36px;
    text-align: center;
    transition: color 0.2s;
}

.zoom-indicator.visible {
    color: var(--accent-color);
}

/* Fullscreen mode */
.image-fullscreen {
    position: fixed !important;
    top: 0;
    left: 0;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999;
    background: var(--background-dark);
    border-radius: 0 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-fullscreen .image-wrapper {
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-fullscreen #annotated-image {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
}

.image-fullscreen .image-toolbar {
    position: fixed;
    bottom: 20px;
    right: 20px;
    opacity: 0.8;
}

.image-fullscreen .clean-view-toggle {
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 10000;
}

/* ===== Mobile Warning Banner ===== */
.mobile-warning {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #1a0f0a;
    border-top: 1px solid rgba(200, 120, 60, 0.5);
    color: #e8c9a0;
    padding: 10px 16px;
    font-size: 13px;
    z-index: 9999;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    line-height: 1.4;
}

@media (max-width: 768px) {
    .mobile-warning {
        display: flex;
    }
}

.mobile-warning-dismiss {
    background: none;
    border: none;
    color: #e8c9a0;
    font-size: 16px;
    cursor: pointer;
    padding: 4px 6px;
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.7;
}

.mobile-warning-dismiss:hover {
    opacity: 1;
}