/* ==========================================================================
   Vision Transformer Interpretability Demo — Stylesheet
   Dark Mode by Default with Theme Toggle & Distinct Footer Section
   ========================================================================== */

/* --- Dark Theme (Default) --- */
:root, [data-theme="dark"] {
  --bg-color: #121212;
  --surface-color: #242424;
  --surface-alt: #242424;
  --surface-hover: #2c2c2c;
  --border-color: #383838;
  --border-subtle: #2e2e2e;
  --border-focus: #52525b;
  
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-subtle: #71717a;
  
  --primary-color: #242424;
  --primary-hover: #2c2c2c;
  --primary-light: #2c2c2c;
  --accent-color: #f4f4f5;
  --accent-tag: #242424;
  
  /* Footer Color matching surface */
  --footer-bg: #242424;
  --footer-header-bg: #242424;
  --footer-border: #383838;
  --footer-item-bg: #242424;
  --footer-item-border: #383838;
  --footer-item-hover: #2c2c2c;

  --danger-color: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --success-color: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.15);

  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-color: #ffffff;
  --surface-color: #f4f4f5;
  --surface-alt: #f4f4f5;
  --surface-hover: #e4e4e7;
  --border-color: #e4e4e7;
  --border-subtle: #e4e4e7;
  --border-focus: #71717a;
  
  --text-main: #18181b;
  --text-muted: #71717a;
  --text-subtle: #a1a1aa;
  
  --primary-color: #f4f4f5;
  --primary-hover: #e4e4e7;
  --primary-light: #e4e4e7;
  --accent-color: #18181b;
  --accent-tag: #f4f4f5;
  
  /* Footer Color matching surface in Light Mode */
  --footer-bg: #f4f4f5;
  --footer-header-bg: #f4f4f5;
  --footer-border: #e4e4e7;
  --footer-item-bg: #f4f4f5;
  --footer-item-border: #e4e4e7;
  --footer-item-hover: #e4e4e7;

  --danger-color: #b91c1c;
  --danger-bg: #fef2f2;
  --success-color: #15803d;
  --success-bg: #f0fdf4;

  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
}

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 32px 48px;
}

/* ==========================================================================
   Header & Theme Toggle
   ========================================================================== */
.app-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 56px;
}

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

.logo-area h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-top: 4px;
}

.paper-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--surface-color);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-meta strong {
  color: var(--text-main);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: none;
  transition: all 0.15s ease;
}

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

.theme-icon {
  font-size: 1rem;
}

/* ==========================================================================
   Alert Banner
   ========================================================================== */
.alert-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background-color: var(--danger-bg);
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.alert-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: inherit;
  cursor: pointer;
  padding: 0 4px;
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   Top Section: Image Upload (Left) & Controls (Right)
   ========================================================================== */
.top-section {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 56px;
  background-color: var(--surface-color);
  border: none;
  border-radius: 16px;
  padding: 28px;
  box-shadow: none;
}

.control-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* --- Left: Square Image Upload Box --- */
.upload-container {
  display: flex;
  flex-direction: column;
}

.drop-zone {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--surface-alt);
  border: 2px dashed var(--border-subtle);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.2s ease;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--border-focus);
  background-color: var(--surface-hover);
}

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.upload-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
  pointer-events: none;
}

.upload-icon {
  width: 44px;
  height: 44px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.prompt-main {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.prompt-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.preview-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.image-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(11, 15, 25, 0.7);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  font-size: 0.85rem;
  font-weight: 600;
}

.drop-zone:hover .preview-overlay {
  opacity: 1;
}

/* --- Right: Controls Column --- */
.controls-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

/* Equal sizing for Model Selection and Class Selector */
.uniform-input-box {
  width: 100%;
  max-width: 580px;
  height: 44px;
  position: relative;
}

.form-control {
  width: 100%;
  height: 100%;
  font-family: inherit;
  font-size: 0.925rem;
  color: var(--text-main);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: none;
}

.select-wrapper {
  position: relative;
}

.select-wrapper select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 36px;
  cursor: pointer;
}

.dropdown-arrow {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.65rem;
  color: var(--text-muted);
  pointer-events: none;
}

/* Class Input Group */
.class-input-group {
  display: flex;
  gap: 8px;
}

.class-text-input {
  flex: 1;
}

.mode-dropdown-wrapper {
  width: 160px;
  height: 100%;
  flex-shrink: 0;
}

.helper-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-style: italic;
}

/* --- Method Selection Checkboxes --- */
.methods-group {
  margin-top: 4px;
}

.methods-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.methods-header .control-label {
  margin-bottom: 0;
}

.methods-quick-actions {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.text-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0 2px;
}

.text-btn:hover {
  color: var(--text-main);
  text-decoration: underline;
}

.sep {
  margin: 0 4px;
  color: var(--text-subtle);
}

.checkboxes-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
  font-size: 0.88rem;
}

.checkbox-card:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-subtle);
}

.checkbox-card input[type="checkbox"] {
  accent-color: var(--border-focus);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.checkbox-text {
  display: flex;
  align-items: center;
  gap: 6px;
}

.checkbox-text strong {
  font-weight: 600;
}

.method-tag {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 1px 6px;
  border-radius: 4px;
  background-color: var(--surface-color);
  color: var(--text-muted);
  text-transform: uppercase;
}

.tag-primary {
  background-color: var(--surface-hover);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.primary-method {
  border-color: var(--border-focus);
}

/* --- Action Group: Simulate Button --- */
.action-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 4px;
}

.simulate-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 160px;
  height: 44px;
  padding: 0 24px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  box-shadow: none;
  transition: background-color 0.15s, border-color 0.15s, transform 0.05s;
}

.simulate-btn:hover:not(:disabled) {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
}

.simulate-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.simulate-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.sim-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ==========================================================================
   Middle Section: Heatmaps Container
   ========================================================================== */
.heatmaps-outer {
  position: relative;
  margin-bottom: 56px;
}

.heatmaps-badge-wrapper {
  position: absolute;
  top: -14px;
  right: 28px;
  z-index: 5;
}

.heatmaps-badge {
  display: inline-block;
  padding: 4px 18px;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-main);
  background-color: var(--surface-color);
  border: none;
  border-radius: 9999px;
  box-shadow: none;
}

.heatmaps-container {
  background-color: var(--surface-color);
  border: none;
  border-radius: 16px;
  padding: 32px 28px 28px;
  box-shadow: none;
}

.results-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 12px 16px;
  margin-bottom: 24px;
  background-color: var(--surface-alt);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.summary-card {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}

.summary-title {
  color: var(--text-muted);
}

.summary-val {
  font-weight: 600;
  color: var(--text-main);
}

/* Heatmaps Controls Toolbar */
.heatmaps-toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 20px;
}

.overlay-toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.toggle-label-side {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.toggle-label-side.active {
  color: var(--text-main);
  font-weight: 600;
}

/* Pill Toggle Switch (Neutral 2-color styling) */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--border-color);
  border: 1px solid var(--border-focus);
  transition: background-color 0.2s ease, border-color 0.2s ease;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-muted);
  transition: transform 0.2s ease, background-color 0.2s ease;
  border-radius: 50%;
}

.switch input:checked + .slider {
  background-color: var(--border-focus);
}

.switch input:checked + .slider:before {
  transform: translateX(20px);
  background-color: var(--text-main);
}

.switch input:focus-visible + .slider {
  outline: 2px solid var(--border-focus);
}

.heatmaps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 960px) {
  .heatmaps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .heatmaps-grid {
    grid-template-columns: 1fr;
  }
}

.heatmap-card {
  display: flex;
  flex-direction: column;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: none;
}

.heatmap-card:hover {
  box-shadow: none;
  transform: none;
}

.heatmap-card.card-primary {
  border: 2px solid var(--border-focus);
}

.card-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-alt);
}

.card-title-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.method-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.heatmap-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.frame-placeholder {
  color: var(--text-subtle);
  font-size: 0.85rem;
  font-style: italic;
}

.heatmap-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ==========================================================================
   Footer Section: Full-width container with low-contrast background
   ========================================================================== */
.footer-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  width: 100%;
  margin: 0;
}

.footer-section {
  width: 100%;
  background-color: var(--surface-color);
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 44px 0 64px;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.footer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--border-color);
  background-color: transparent;
}

.footer-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.footer-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.collapse-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-muted);
}

.collapse-btn:hover {
  background-color: var(--surface-hover);
  color: var(--text-main);
  border-color: var(--border-focus);
}

.collapse-icon {
  font-size: 0.75rem;
  transition: transform 0.25s ease;
}

.collapse-btn.collapsed .collapse-icon {
  transform: rotate(-90deg);
}

.footer-body {
  padding: 24px 0 0;
  transition: max-height 0.3s ease, opacity 0.2s ease;
}

.footer-body.collapsed {
  display: none;
}

/* Footer Search Bar */
.footer-search-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-search-group {
  display: flex;
  gap: 8px;
  flex: 1;
  max-width: 520px;
}

.footer-mode-select-wrapper {
  width: 150px;
  height: 38px;
  flex-shrink: 0;
}

.footer-mode-select {
  height: 38px;
  font-size: 0.88rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
}

.footer-search-input {
  height: 38px;
  font-size: 0.88rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
}

.footer-count-badge {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Class List Grid: borderless, transparent, clean custom scrollbar */
.class-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 8px;
  max-height: 380px;
  overflow-y: auto;
  padding: 12px 6px 12px 0;
  background-color: transparent;
  border: none;
  border-radius: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-focus) transparent;
}

.class-list-grid::-webkit-scrollbar {
  width: 6px;
}

.class-list-grid::-webkit-scrollbar-track {
  background: transparent;
}

.class-list-grid::-webkit-scrollbar-thumb {
  background-color: var(--border-focus);
  border-radius: 3px;
}

.class-list-grid::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-muted);
}

.class-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 12px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.84rem;
  transition: all 0.1s ease;
  user-select: none;
}

.class-item:hover {
  border-color: var(--border-focus);
  background-color: var(--surface-hover);
  transform: translateX(2px);
}

.class-item.active {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
  font-weight: 600;
}

.cls-idx {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.cls-name {
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.class-list-loading,
.class-list-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .top-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .drop-zone {
    max-width: 320px;
    margin: 0 auto;
  }
  
  .uniform-input-box {
    max-width: 100%;
  }
}

/* ==========================================================================
   Modern SaaS / Product Landing Hero Section (Monday.com style)
   ========================================================================== */
.hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px 0 16px;
  margin-bottom: 72px;
  position: relative;
  background: transparent;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 6px;
  background: var(--surface-alt);
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.hero-badge-text {
  font-size: 0.8rem;
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.hero-heading {
  font-size: clamp(2rem, 3.2vw, 2.9rem);
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 100%;
  margin: 0 auto 30px;
}

.hero-subheading {
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 1050px;
  margin: 0 auto 32px;
}

.hero-callout-quote {
  max-width: 1050px;
  margin: 0 auto 40px;
  padding: 18px 24px;
  background: var(--surface-color);
  border: none;
  border-left: 3px solid var(--border-focus);
  border-radius: 0 8px 8px 0;
  text-align: left;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-main);
  box-shadow: none;
}

[data-theme="light"] .hero-callout-quote {
  background: var(--surface-color);
  border-left-color: var(--border-focus);
  color: var(--text-main);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0;
}

.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 6px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--text-main) !important;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  box-shadow: none;
}

.hero-cta-btn:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
  transform: none;
  box-shadow: none;
}

.hero-cta-btn:active {
  transform: none;
}

.hero-metrics {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 12px 24px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: none;
  flex-wrap: wrap;
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.metric-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
}

.metric-lbl {
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.metric-divider {
  width: 1px;
  height: 28px;
  background-color: var(--border-color);
}

@media (max-width: 768px) {
  .hero-section {
    padding: 44px 16px 36px;
  }
  .hero-heading {
    font-size: 2.35rem;
  }
  .hero-subheading {
    font-size: 1.05rem;
  }
  .hero-metrics {
    gap: 18px;
  }
  .metric-divider {
    display: none;
  }
}

/* ==========================================================================
   Sample Images Slider Section
   ========================================================================== */
.sample-slider-section {
  background-color: var(--surface-color);
  border: none;
  border-radius: 16px;
  padding: 24px 28px 26px;
  margin-bottom: 56px;
  box-shadow: none;
}

.sample-slider-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.sample-slider-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.sample-slider-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sample-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
}

/* Flat Navigation Buttons */
.slider-nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: none;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  user-select: none;
  padding: 0;
}

.slider-nav-btn svg {
  display: block;
  stroke: currentColor;
}

.slider-nav-btn:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
}

.slider-nav-btn:active {
  transform: none;
}

.sample-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 4px;
  scrollbar-width: none;
  flex: 1;
}

.sample-track::-webkit-scrollbar {
  display: none;
}

/* Sample Card: 224x224 Square Thumbnail */
.sample-card {
  display: flex;
  flex-direction: column;
  width: 224px;
  flex-shrink: 0;
  background-color: var(--surface-alt);
  border: 2px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sample-card:hover {
  border-color: var(--border-focus);
}

.sample-card.active {
  border-color: var(--border-focus);
  outline: 1px solid var(--border-focus);
}

.sample-thumb-wrapper {
  width: 224px;
  height: 224px;
  background-color: #000000;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sample-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sample-card-info {
  padding: 8px 12px 10px;
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sample-card-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sample-card-class {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}