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

:root {
  --bg: #0d0d0d;
  --surface: #1a1a2e;
  --surface-hover: #252542;
  --accent: #e94560;
  --accent-glow: rgba(233, 69, 96, 0.3);
  --text: #eee;
  --text-dim: #888;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 120px;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  flex-wrap: wrap;
  gap: 16px;
}

header h1 {
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--accent), #ff6b8a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

#mode-selector {
  display: flex;
  gap: 8px;
}

.mode-btn {
  background: var(--surface);
  color: var(--text-dim);
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

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

.mode-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.playlist-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.playlist-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.playlist-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.playlist-card .card-info {
  padding: 12px;
}

.playlist-card .card-info h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.playlist-card .card-info span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.no-cover {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #2a2a4a, #1a1a2e);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--accent);
}

/* Tracks view */
.hidden {
  display: none !important;
}

#back-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 1rem;
  cursor: pointer;
  margin-bottom: 16px;
  padding: 4px 0;
}

#back-btn:hover {
  text-decoration: underline;
}

#playlist-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

#playlist-cover {
  width: 120px;
  height: 120px;
  border-radius: var(--radius);
  object-fit: cover;
}

#playlist-count {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.track-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

.track-item:hover {
  background: var(--surface-hover);
}

.track-item.active {
  background: var(--surface);
  border-left: 3px solid var(--accent);
}

.track-item img {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
}

.track-item .track-info {
  flex: 1;
  min-width: 0;
}

.track-item .track-title {
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-item .track-artist {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.track-item .track-duration {
  color: var(--text-dim);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* Player bar */
#player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, #0d0d0d, var(--surface));
  border-top: 1px solid #2a2a3e;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  z-index: 100;
  backdrop-filter: blur(12px);
}

#now-playing {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
  max-width: 280px;
}

#np-cover {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
}

#np-info {
  min-width: 0;
}

#np-title {
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#np-artist {
  font-size: 0.8rem;
  color: var(--text-dim);
}

#player-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

#player-controls button {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  transition: color 0.15s, background 0.15s;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#player-controls button:hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.05);
}

#btn-play {
  background: var(--accent) !important;
  color: white !important;
  font-size: 1.2rem;
  width: 48px;
  height: 48px;
}

#btn-play:hover {
  background: #ff5a75 !important;
}

#progress-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

#progress-container span {
  font-size: 0.75rem;
  color: var(--text-dim);
  min-width: 36px;
  text-align: center;
}

#progress-bar {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #333;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

#progress-bar::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

#progress-bar::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

/* Responsive */
@media (max-width: 640px) {
  .grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
  }

  #player-bar {
    flex-wrap: wrap;
    padding: 10px 12px;
    gap: 8px;
  }

  #now-playing {
    min-width: unset;
    max-width: unset;
    flex: 1;
  }

  #progress-container {
    width: 100%;
    order: 3;
  }
}