:root {
  --bg: #000000;
  --bg-card: #0c0d0e;
  --row-bg: #0c0d0e;
  --row-hover: #15171a;
  --border: #1e2023;
  --border-focus: #0a84ff;
  
  --text-main: #ffffff;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  
  --mac-blue: #0a84ff;
  --mac-blue-glow: rgba(10, 132, 255, 0.28);
  
  --btn-bg: #141618;
  --btn-hover: #0a84ff;
  --btn-text: #ffffff;
  --btn-text-hover: #ffffff;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Inter", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
}

html.light-theme,
body.light-theme {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --row-bg: #ffffff;
  --row-hover: #f1f5f9;
  --border: #e2e8f0;
  --border-focus: #007aff;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  
  --btn-bg: #f1f5f9;
  --btn-hover: #007aff;
  --btn-text: #0f172a;
  --btn-text-hover: #ffffff;
}

html.dark-theme,
body.dark-theme {
  --bg: #000000;
  --bg-card: #0c0d0e;
  --row-bg: #0c0d0e;
  --row-hover: #15171a;
  --border: #1e2023;
  --border-focus: #0a84ff;
  
  --text-main: #ffffff;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  
  --btn-bg: #141618;
  --btn-hover: #0a84ff;
  --btn-text: #ffffff;
  --btn-text-hover: #ffffff;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color 0.2s ease, color 0.2s ease;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.music-app {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  animation: pageEnter 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}


/* shadcn-style Back / Hub Button */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: all 0.15s ease;
}

.back-btn:hover {
  color: var(--text-main);
  background: var(--row-hover);
  border-color: var(--mac-blue);
}

.back-btn:active {
  transform: scale(0.97);
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-title span {
  color: var(--mac-blue);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: all 0.15s ease;
}

.theme-btn svg {
  display: block;
}

.theme-btn:hover {
  background: var(--row-hover);
  border-color: var(--mac-blue);
  color: var(--text-main);
}

.theme-btn:active {
  transform: scale(0.96);
}

/* shadcn-inspired Theme Dropdown Menu */
.theme-dropdown-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 1px 3px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  display: none;
  flex-direction: column;
  gap: 2px;
  transform-origin: top right;
  animation: themeDropdownPop 0.14s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes themeDropdownPop {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-4px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.theme-dropdown.open {
  display: flex;
}

.theme-dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 32px;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  transition: background-color 0.12s ease, color 0.12s ease;
  user-select: none;
  text-align: left;
}

.theme-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-dropdown-item:hover,
.theme-dropdown-item:focus-visible {
  background-color: var(--row-hover);
  color: var(--text-main);
}

.theme-dropdown-item .check-icon {
  opacity: 0;
  color: var(--mac-blue);
  transition: opacity 0.12s ease;
}

.theme-dropdown-item.active {
  color: var(--text-main);
  font-weight: 600;
  background-color: var(--row-hover);
}

.theme-dropdown-item.active .check-icon {
  opacity: 1;
}

/* Controls Bar (Search + Filter Tabs) */
.controls-bar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-dim);
  font-size: 15px;
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 60px 12px 42px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--mac-blue-glow);
}

.shortcut-badge {
  position: absolute;
  right: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 22px;
  padding: 0 7px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text-muted);
  background: var(--btn-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  letter-spacing: 0.04em;
  user-select: none;
  pointer-events: none;
}

body.light-theme .shortcut-badge {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: #64748b;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--btn-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease, transform 0.08s ease;
  display: inline-flex;
  align-items: center;
  user-select: none;
}

.tab-btn:hover {
  color: var(--text-main);
  border-color: #3b82f6;
}

.tab-btn.active {
  background: #2563eb;
  border-color: #3b82f6;
  color: #ffffff;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.35);
}

.tab-btn[data-category="favourite"].active {
  background: #eab308;
  border-color: #facc15;
  color: #000000;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(234, 179, 8, 0.25);
}

.tab-btn[data-category="nostalgia"].active {
  background: #8b5cf6;
  border-color: #a78bfa;
  color: #ffffff;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(139, 92, 246, 0.25);
}

.tab-btn[data-category="drama-tune"].active {
  background: #f43f5e;
  border-color: #fb7185;
  color: #ffffff;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(244, 63, 94, 0.25);
}

.tab-btn[data-category="Phonk"].active,
.tab-btn[data-category="phonk"].active {
  background: #06b6d4;
  border-color: #22d3ee;
  color: #000000;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(6, 182, 212, 0.3);
}

.tab-btn:active {
  transform: scale(0.96);
}

.songs-counter {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Song List */
.songs-list {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.song-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  transition: background-color 0.15s ease;
  content-visibility: auto;
  contain-intrinsic-size: 0 63px;
  cursor: pointer;
}

.song-row:last-child {
  border-bottom: none;
}

.song-row:hover {
  background-color: var(--row-hover);
}

.song-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1;
}

/* YouTube Thumbnail (Native img with lazy load & async decode) */
.cover-art {
  width: 50px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: #121417;
  object-fit: cover;
  object-position: center;
  display: block;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
}

.song-details {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.song-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 1px 6px;
  border-radius: 4px;
}

.badge-tag.hindi {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.badge-tag.english {
  background: rgba(0, 122, 255, 0.12);
  color: var(--mac-blue);
}

.badge-tag.punjabi {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
}

.badge-tag.urdu {
  background: rgba(20, 184, 166, 0.15);
  color: #2dd4bf;
}

.badge-tag.chinese {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.badge-tag.japanese {
  background: rgba(244, 114, 182, 0.15);
  color: #f472b6;
}

.badge-tag.german {
  background: rgba(234, 179, 8, 0.15);
  color: #facc15;
}

.badge-tag.korean {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
}

.badge-tag.nostalgia {
  background: rgba(139, 92, 246, 0.15);
  color: #c084fc;
}

.badge-tag.drama-tune {
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
}

.badge-tag.phonk {
  background: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
}


.fav-star {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 4px;
  vertical-align: middle;
  filter: drop-shadow(0 1px 3px rgba(234, 179, 8, 0.45));
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.fav-star:hover {
  transform: scale(1.22) rotate(6deg);
}

.fav-star svg {
  display: block;
}

.song-artist {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* shadcn-inspired Blue Primary Button */
.btn-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  height: 32px;
  padding: 0 13px;
  border-radius: var(--radius-sm);
  background-color: #2563eb;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  text-decoration: none;
  cursor: pointer;
  outline: none;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-open:hover {
  background-color: #1d4ed8;
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-open:active {
  background-color: #1e40af;
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-open:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

body.light-theme .btn-open {
  background-color: #2563eb;
  border: 1px solid #1d4ed8;
  color: #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

body.light-theme .btn-open:hover {
  background-color: #1d4ed8;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

/* Empty State */
.empty-songs {
  padding: 36px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  display: none;
}

/* Footer */
footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 14px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--mac-blue);
}

@media (max-width: 580px) {
  .music-app {
    padding: 24px 16px 60px;
  }
  .song-row {
    padding: 12px 14px;
  }
  .song-artist {
    display: none;
  }
}