/* ========================================
   DESIGN TOKENS — There's A Trick For That
   Art direction: Technical/DIY energy, dark-first
   ======================================== */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 880px;
  --content-wide: 1100px;

  /* Font families */
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

/* DARK MODE (default) */
:root, [data-theme="dark"] {
  --color-bg:             #0f1114;
  --color-surface:        #181b20;
  --color-surface-2:      #1e2228;
  --color-surface-offset: #151820;
  --color-surface-hover:  #242830;
  --color-divider:        #2a2e36;
  --color-border:         #333840;

  --color-text:           #e4e6ea;
  --color-text-muted:     #8b919c;
  --color-text-faint:     #5a6070;

  /* Primary: Amber/Solar Orange */
  --color-primary:        #f59e0b;
  --color-primary-hover:  #d97706;
  --color-primary-text:   #fbbf24;

  /* Red accent for YouTube branding hint */
  --color-accent:         #ef4444;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

/* LIGHT MODE */
[data-theme="light"] {
  --color-bg:             #f5f5f0;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafaf8;
  --color-surface-offset: #eeeee8;
  --color-surface-hover:  #f0f0ea;
  --color-divider:        #ddddd6;
  --color-border:         #ccccc4;

  --color-text:           #1a1c20;
  --color-text-muted:     #5c6070;
  --color-text-faint:     #9ca0aa;

  --color-primary:        #d97706;
  --color-primary-hover:  #b45309;
  --color-primary-text:   #92400e;

  --color-accent:         #dc2626;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f5f5f0;
    --color-surface:        #ffffff;
    --color-surface-2:      #fafaf8;
    --color-surface-offset: #eeeee8;
    --color-surface-hover:  #f0f0ea;
    --color-divider:        #ddddd6;
    --color-border:         #ccccc4;
    --color-text:           #1a1c20;
    --color-text-muted:     #5c6070;
    --color-text-faint:     #9ca0aa;
    --color-primary:        #d97706;
    --color-primary-hover:  #b45309;
    --color-primary-text:   #92400e;
    --color-accent:         #dc2626;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  }
}

/* ========================================
   LAYOUT
   ======================================== */

.site-wrapper {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ========================================
   BANNER
   ======================================== */

.site-banner {
  width: 100%;
  overflow: hidden;
  line-height: 0;
  background: #1a1c20;
}

.banner-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 200px;
}

@media (max-width: 640px) {
  .banner-img {
    max-height: 120px;
  }
}

/* ========================================
   HEADER
   ======================================== */

.site-header {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-divider);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

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

.logo-avatar {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--color-divider);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.logo-text span {
  color: #20c9bd;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.yt-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.yt-link:hover {
  opacity: 0.9;
}

.yt-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ========================================
   HERO / SEARCH AREA
   ======================================== */

.hero {
  padding: clamp(var(--space-10), 6vw, var(--space-20)) 0 clamp(var(--space-8), 4vw, var(--space-16));
  text-align: center;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.hero-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 520px;
  margin-inline: auto;
}

/* Search box */
.search-wrapper {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  padding-left: 52px;
  font-size: var(--text-base);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  color: var(--color-text);
  outline: none;
}

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

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.search-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
  width: 20px;
  height: 20px;
}

.search-input:focus ~ .search-icon {
  color: var(--color-primary);
}

.clear-btn {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  color: var(--color-text-faint);
  display: none;
}

.clear-btn.visible {
  display: flex;
}

.clear-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

/* Live result count */
.search-live-count {
  text-align: center;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 1.5em;
  transition: opacity 0.15s ease;
}

.search-live-count:empty {
  display: none;
}

.search-live-count strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Quick search tags */
.quick-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
}

.quick-tag {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  cursor: pointer;
}

.quick-tag:hover {
  color: var(--color-primary-text, var(--color-primary));
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, var(--color-surface));
}

/* ========================================
   SORT BAR
   ======================================== */

.filter-section {
  padding: 0 0 var(--space-4);
}

.sort-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.sort-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  white-space: nowrap;
  margin-right: var(--space-1);
}

.sort-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-interactive);
}

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

.sort-btn.active {
  color: var(--color-bg);
  background: var(--color-text);
  border-color: var(--color-text);
}

/* ========================================
   RESULTS
   ======================================== */

.results-section {
  flex: 1;
  padding-bottom: var(--space-16);
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.results-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.results-count strong {
  color: var(--color-text);
}

.sort-select {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  cursor: pointer;
}

.results-grid {
  display: grid;
  gap: var(--space-4);
}

/* Video card */
.video-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  text-decoration: none;
  color: var(--color-text);
  cursor: pointer;
}

.video-card:hover {
  border-color: var(--color-border);
  background: var(--color-surface-hover);
  box-shadow: var(--shadow-md);
}

.video-card.kbd-focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary) 25%, transparent), var(--shadow-md);
  background: var(--color-surface-hover);
}

.card-thumb {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--color-surface-offset);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.2s ease;
}

.video-card:hover .card-thumb img {
  transform: scale(1.03);
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* Card meta row */
.card-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Transcript badge (search results) */
.transcript-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #20c9bd;
  background: color-mix(in srgb, #20c9bd 12%, transparent);
  border: 1px solid color-mix(in srgb, #20c9bd 25%, transparent);
}

/* Has transcript label (initial state) */
.has-transcript {
  display: inline-flex;
  align-items: center;
  padding: 1px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  color: var(--color-text-faint);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
}

/* Transcript matches section */
.transcript-matches {
  margin-top: var(--space-2);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-2);
}

.transcript-label {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.7rem;
  font-weight: 600;
  color: #20c9bd;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}

.transcript-label svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  stroke: #20c9bd;
}

.transcript-match {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: background var(--transition-interactive);
  margin-bottom: 2px;
}

.transcript-match:hover {
  background: var(--color-surface-hover);
}

.transcript-time {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 1px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary-text, var(--color-primary));
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.6;
}

.transcript-time svg {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
}

.transcript-text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.transcript-more {
  display: inline-block;
  font-size: 0.68rem;
  color: var(--color-text-faint);
  padding-left: var(--space-2);
  margin-top: var(--space-1);
}

/* Match highlight */
.match-highlight {
  background: color-mix(in srgb, var(--color-primary) 20%, transparent);
  color: var(--color-primary-text, var(--color-primary));
  border-radius: 2px;
  padding: 0 2px;
}

/* No results */
.no-results {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-text-muted);
}

.no-results-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  color: var(--color-text-faint);
}

.no-results h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

/* Initial state - show browse all */
.browse-all {
  text-align: center;
  padding: var(--space-4) 0;
}

.browse-all p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin: 0 auto;
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-divider);
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.footer-inner a {
  color: var(--color-text-faint);
  text-decoration: none;
  font-size: var(--text-xs);
}

.footer-inner a:hover {
  color: var(--color-text-muted);
}

.footer-stats {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ========================================
   LOADING STATE
   ======================================== */

.loading {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-text-muted);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-divider);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  animation: spin 0.8s linear infinite;
}

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

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 640px) {
  .video-card {
    grid-template-columns: 1fr;
  }
  
  .card-thumb {
    max-height: 200px;
  }
  
  .yt-link span {
    display: none;
  }
  
  .hero-title {
    font-size: var(--text-xl);
  }
  
  .search-input {
    padding: var(--space-3) var(--space-4);
    padding-left: 44px;
    font-size: var(--text-sm);
  }
  
  .search-icon {
    left: var(--space-4);
  }
  
  .logo-text {
    font-size: var(--text-base);
  }
  
  .logo-avatar {
    width: 40px;
    height: 40px;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .transcript-match {
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .transcript-time {
    align-self: flex-start;
  }
  
  .sort-btn {
    font-size: 0.72rem;
    padding: var(--space-1) var(--space-3);
  }
}

/* Smooth fade-in for results */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.video-card {
  animation: fadeIn 0.3s ease-out both;
}

.video-card:nth-child(2) { animation-delay: 0.05s; }
.video-card:nth-child(3) { animation-delay: 0.1s; }
.video-card:nth-child(4) { animation-delay: 0.15s; }
.video-card:nth-child(5) { animation-delay: 0.2s; }