:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Dark Theme Palette (Default) */
  --bg-primary: #0a0d14;
  --bg-secondary: #101522;
  --bg-card: #151c2e;
  --bg-card-hover: #1a233a;
  --bg-input: #101626;
  --border-color: #242f4c;
  --border-color-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --purple: #8b5cf6;
  --purple-bg: rgba(139, 92, 246, 0.15);
  --cyan: #06b6d4;
  --cyan-bg: rgba(6, 182, 212, 0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-color-focus: #3b82f6;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #f8fafc, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-text h1 {
  background: linear-gradient(to right, #0f172a, #334155);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  background-color: var(--success-bg);
  color: var(--success);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero-header {
  margin-bottom: 1.75rem;
}

.hero-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

/* Search Box */
.search-box {
  max-width: 850px;
  margin: 0 auto;
}

.search-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.input-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1.25rem;
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  pointer-events: none;
}

.input-wrapper input {
  width: 100%;
  padding: 1rem 5.5rem 1rem 3.25rem;
  font-size: 1rem;
  font-family: var(--font-sans);
  background-color: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.input-wrapper input:focus {
  outline: none;
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.paste-btn {
  position: absolute;
  right: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.paste-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-card-hover);
}

.submit-btn {
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  min-width: 160px;
}

/* History Bar */
.history-section {
  max-width: 850px;
  margin: 0 auto 2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.history-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.65rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  cursor: pointer;
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all var(--transition-fast);
}

.history-item:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Cards & Components */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

/* Loading Card */
.loading-card {
  max-width: 600px;
  margin: 2rem auto;
  text-align: center;
  padding: 3rem 2rem;
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.radar-spinner {
  width: 54px;
  height: 54px;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.loading-text p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Error Card */
.error-card {
  max-width: 650px;
  margin: 2rem auto;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background-color: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.4);
}

.error-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background-color: var(--danger);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.error-content h3 {
  color: #fca5a5;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.error-content p {
  color: #fecaca;
  font-size: 0.95rem;
  word-break: break-word;
}

/* Page Summary Card */
.page-summary-card {
  margin-bottom: 2rem;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-secondary));
}

.summary-header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.summary-title-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 250px;
}

.summary-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.download-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

.page-title-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.favicon {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.final-url-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  word-break: break-all;
}

.final-url-link:hover {
  text-decoration: underline;
}

.page-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.stat-badge {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

.stat-playable .stat-number { color: var(--success); }
.stat-hls .stat-number { color: var(--cyan); }
.stat-embed .stat-number { color: var(--purple); }
.stat-speed .stat-number { color: var(--warning); }

/* Filter Tabs */
.filter-row {
  margin-bottom: 1.5rem;
}

.tabs-group {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.tab-btn {
  padding: 0.6rem 1.15rem;
  font-size: 0.875rem;
  font-weight: 600;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.4);
}

/* Videos Grid */
.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.5rem;
}

/* Video Card */
.video-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.video-card:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-lg);
}

.video-media-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.video-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-overlay-btn {
  position: absolute;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(59, 130, 246, 0.9);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.play-overlay-btn:hover {
  transform: scale(1.1);
  background-color: var(--accent-primary);
}

.play-overlay-btn svg {
  width: 24px;
  height: 24px;
  margin-left: 2px;
}

.video-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  flex: 1;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.pill {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.pill-mp4 { background-color: var(--success-bg); color: var(--success); }
.pill-m3u8 { background-color: var(--cyan-bg); color: var(--cyan); }
.pill-mpd { background-color: var(--warning-bg); color: var(--warning); }
.pill-webm { background-color: var(--purple-bg); color: var(--purple); }
.pill-embed { background-color: rgba(139, 92, 246, 0.2); color: #c084fc; }
.pill-unknown { background-color: var(--border-color); color: var(--text-muted); }

.pill-source {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.pill-res {
  background-color: var(--accent-light);
  color: #60a5fa;
}

.card-video-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.context-row {
  font-size: 0.775rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background-color: var(--bg-primary);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  word-break: break-all;
}

.url-container {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.url-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.url-copy-link {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 0.7rem;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-transform: none;
  letter-spacing: normal;
}

.url-copy-link:hover {
  text-decoration: underline;
}

.url-preview-row {
  font-size: 0.775rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  word-break: break-all;
  overflow-wrap: anywhere;
  white-space: normal;
  line-height: 1.45;
  user-select: all;
  max-height: 120px;
  overflow-y: auto;
}

/* Card Action Buttons */
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.card-actions .btn {
  flex: 1 1 calc(50% - 0.25rem);
  padding: 0.55rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  text-decoration: none;
  min-width: 0;
  white-space: nowrap;
}

.card-actions .btn-primary.download-btn {
  flex: 1 1 100%;
  padding: 0.7rem 1rem;
  font-size: 0.875rem;
  gap: 0.5rem;
  letter-spacing: 0.01em;
}

.card-actions .btn svg {
  flex-shrink: 0;
}

/* Raw Inspector Panel */
.inspector-card {
  padding: 1.5rem;
}

.inspector-header {
  margin-bottom: 1rem;
}

.inspector-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.inspector-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.inspector-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  overflow-x: auto;
}

.subtab-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  cursor: pointer;
}

.subtab-btn.active {
  background-color: var(--accent-light);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  font-weight: 600;
}

.inspector-code-block {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  max-height: 500px;
  overflow: auto;
}

.inspector-code-block pre code {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: #38bdf8;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}

.modal-dialog {
  position: relative;
  width: 100%;
  max-width: 650px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  max-height: 85vh;
  z-index: 10;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.btn-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.btn-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.probe-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.probe-metric {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
}

.metric-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.metric-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
  margin-top: 0.2rem;
}

.headers-code-block {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  max-height: 250px;
  overflow: auto;
}

.headers-code-block pre code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  align-items: center;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--accent-primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 200;
  animation: slideUp 0.25s ease-out;
}

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

/* Generic Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  font-family: inherit;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-focus);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-icon:hover {
  color: var(--text-primary);
  border-color: var(--border-color-focus);
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent-primary);
  cursor: pointer;
  font-size: inherit;
}

.btn-link:hover {
  text-decoration: underline;
}

/* Theme toggle */
.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }

/* Responsive adjustments */
@media (max-width: 768px) {
  .search-form {
    flex-direction: column;
  }
  .submit-btn {
    width: 100%;
  }
  .videos-grid {
    grid-template-columns: 1fr;
  }
  .hero-header h2 {
    font-size: 1.75rem;
  }
}