/* ================================================================
   Workout Library — style.css
   Dark theme, TV-optimized, Fire TV remote navigation
   ================================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0d0d0d;
  --surface:    #181818;
  --surface2:   #222222;
  --border:     #2e2e2e;
  --accent:     #e8a020;
  --accent-dim: #b07818;
  --text:       #f0f0f0;
  --text-dim:   #999;
  --text-faint: #555;
  --danger:     #e05050;
  --focus-ring: 0 0 0 4px var(--accent);
  --radius:     10px;
  --radius-lg:  16px;
  --transition: 150ms ease;
}

html { font-size: 18px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* --- Header --- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #0d0d0de8;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  max-width: 1800px;
  margin: 0 auto;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.logo-icon { font-size: 2rem; }
.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.site-logo:focus { outline: none; }
.site-logo:focus .logo-text { text-decoration: underline; }

/* --- Search --- */
.search-form {
  display: flex;
  gap: 0;
  flex: 1;
  max-width: 600px;
  margin-left: auto;
}
.search-input {
  flex: 1;
  background: var(--surface2);
  border: 2px solid var(--border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  color: var(--text);
  font-size: 1rem;
  padding: 0.55rem 1rem;
  outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--accent); }
.search-btn {
  background: var(--accent);
  border: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #000;
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.55rem 1rem;
  transition: background var(--transition);
}
.search-btn:hover, .search-btn:focus {
  background: var(--accent-dim);
  outline: none;
}

/* --- Breadcrumb --- */
.breadcrumb {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 2rem;
  font-size: 0.95rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.bc-link {
  color: var(--accent);
  transition: color var(--transition);
}
.bc-link:hover, .bc-link:focus {
  color: #fff;
  outline: none;
  text-decoration: underline;
}
.bc-sep { color: var(--text-faint); }
.bc-current { color: var(--text); font-weight: 600; }

/* --- Main --- */
#main-content {
  max-width: 1800px;
  margin: 0 auto;
  padding: 2rem;
}

/* --- Section Titles --- */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.subsection-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  margin: 2rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border);
}

/* --- Folder Grid (home) --- */
.home-section { margin-bottom: 3rem; }
.routines-section { padding-top: 0.5rem; }

.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.folder-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.folder-card:hover,
.folder-card:focus {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(232, 160, 32, 0.18);
  outline: none;
}
.folder-card:focus {
  box-shadow: var(--focus-ring), 0 8px 32px rgba(232, 160, 32, 0.18);
}

.folder-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--surface2);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.folder-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.folder-icon {
  font-size: 3.5rem;
  line-height: 1;
}

.folder-info {
  padding: 0.85rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.folder-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.folder-meta {
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.routine-card .folder-icon { color: var(--accent); }

/* --- Media Grid (folder) --- */
.folder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.sort-controls {
  display: flex;
  gap: 0.5rem;
}
.sort-btn {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  transition: border-color var(--transition), color var(--transition);
}
.sort-btn:hover, .sort-btn:focus, .sort-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.media-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.media-card:hover,
.media-card:focus {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(232, 160, 32, 0.18);
  outline: none;
}
.media-card:focus {
  box-shadow: var(--focus-ring), 0 8px 32px rgba(232, 160, 32, 0.18);
}

.media-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--surface2);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.media-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thumb-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: rgba(255,255,255,0.85);
  background: rgba(0,0,0,0.35);
  transition: background var(--transition);
  z-index: 2;
  pointer-events: none;
}
.media-card:hover .play-overlay { background: rgba(0,0,0,0.2); }

.media-title {
  padding: 0.7rem 0.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.media-folder-tag {
  padding: 0 0.85rem 0.6rem;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
}
.result-count {
  margin-bottom: 1rem;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* --- Video Player --- */
.player-section { display: flex; flex-direction: column; gap: 1.25rem; }

.player-wrapper {
  width: 100%;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 64px rgba(0,0,0,0.7);
}
#main-video {
  width: 100%;
  max-height: 72vh;
  display: block;
  background: #000;
}
.video-error {
  padding: 3rem;
  text-align: center;
  color: var(--danger);
  font-size: 1.1rem;
}

.player-controls-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.ctrl-btn {
  background: var(--surface2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  white-space: nowrap;
}
.ctrl-btn:hover, .ctrl-btn:focus {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
  outline: none;
  box-shadow: var(--focus-ring);
}
.ctrl-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}
.autoplay-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  margin-left: auto;
}
.autoplay-label input { accent-color: var(--accent); width: 1.1rem; height: 1.1rem; cursor: pointer; }

.video-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* --- Playlist --- */
.playlist-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.playlist-title {
  padding: 0.85rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.82rem;
}
.playlist {
  max-height: 280px;
  overflow-y: auto;
}
.playlist-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  cursor: pointer;
}
.playlist-item:last-child { border-bottom: none; }
.playlist-item:hover, .playlist-item:focus {
  background: var(--surface2);
  outline: none;
}
.playlist-item.active { background: rgba(232, 160, 32, 0.1); }
.pl-num {
  color: var(--text-faint);
  font-size: 0.85rem;
  width: 1.5rem;
  flex-shrink: 0;
  text-align: right;
}
.pl-name { flex: 1; font-size: 0.95rem; }
.pl-now {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}
.playlist-item.active .pl-name { color: var(--accent); font-weight: 700; }

/* --- Image Viewer --- */
.image-section { display: flex; flex-direction: column; gap: 1.25rem; }
.image-viewer {
  width: 100%;
  min-height: 50vh;
  max-height: 78vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
#main-image {
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-dim);
}
.empty-icon { font-size: 4rem; margin-bottom: 1rem; }
.empty-state p { font-size: 1.1rem; line-height: 1.7; }
.empty-state code {
  background: var(--surface2);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.95em;
}

/* ================================================================
   TV / Fire TV — Large screen optimizations
   ================================================================ */
@media (min-width: 1280px) {
  html { font-size: 20px; }
  .folder-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.5rem; }
  .media-grid  { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.5rem; }
  #main-video  { max-height: 75vh; }
  .section-title { font-size: 2.4rem; }
  .ctrl-btn { font-size: 1.1rem; padding: 0.75rem 1.5rem; }
}
@media (min-width: 1920px) {
  html { font-size: 22px; }
  .folder-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
  .media-grid  { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

/* --- Focus visible (TV remote navigation) --- */
*:focus-visible {
  outline: 4px solid var(--accent);
  outline-offset: 2px;
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; transform: none !important; }
}