/* Our colors – kept throughout */
:root{
  --bg-1: #0a0a1a;
  --bg-2: #1a1a2e;
  --bg-3: #16213e;
  --bg-elevated: #1e2135;
  --card: rgba(100, 150, 255, 0.06);
  --card-hover: rgba(100, 150, 255, 0.12);
  --muted: #8b9dc3;
  --muted-dark: #5a6a8a;
  --accent: #00d4ff;
  --accent-hover: #00f0ff;
  --accent-secondary: #a855f7;
  --player-bg: #0f111a;
  --hover-bg: rgba(255,255,255,0.08);
  --text-primary: #ffffff;
  --text-secondary: #b3b8c9;
  --border: rgba(255,255,255,0.06);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg-1);
  color:var(--text-primary);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* Spotify-style app layout: sidebar + main + fixed player */
.app-layout{
  display:flex;
  flex:1;
  min-height:0;
  padding-bottom:90px;
}

/* Left sidebar – Spotify style */
.sidebar{
  width:232px;
  min-width:232px;
  height:100vh;
  position:fixed;
  left:0;
  top:0;
  bottom:90px;
  background:var(--bg-2);
  padding:24px 0;
  display:flex;
  flex-direction:column;
  z-index:100;
}
.sidebar-logo{
  padding:0 24px 24px;
  margin-bottom:8px;
}
.logo-text{
  font-size:24px;
  font-weight:700;
  letter-spacing:-0.5px;
  color:var(--text-primary);
}
.sidebar-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:0 12px;
}
.nav-btn{
  display:flex;
  align-items:center;
  gap:16px;
  width:100%;
  padding:12px 16px;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  font-size:15px;
  font-weight:600;
  text-align:left;
  border-radius:8px;
  cursor:pointer;
  transition:background-color 0.2s, color 0.2s;
}
.nav-btn:hover{
  color:var(--text-primary);
  background:var(--hover-bg);
}
.nav-btn.active{
  color:var(--text-primary);
  background:var(--hover-bg);
}
.nav-icon{
  font-size:20px;
  opacity:0.9;
}
.sidebar-playlists{
  flex:1;
  margin-top:24px;
  padding:0 12px;
  overflow-y:auto;
}
.playlists-label{
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:1.5px;
  color:var(--text-secondary);
  margin:0 0 12px 8px;
}
.categories button{
  display:flex;
  align-items:center;
  width:100%;
  padding:10px 16px;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  font-size:14px;
  text-align:left;
  border-radius:4px;
  cursor:pointer;
  transition:background-color 0.2s, color 0.2s;
}
.categories button:hover{
  color:var(--text-primary);
  background:var(--hover-bg);
}
.categories button.active{
  color:var(--text-primary);
  background:var(--hover-bg);
}
.sidebar-hamburger{
  display:none;
  position:fixed;
  top:16px;
  left:16px;
  width:40px;
  height:40px;
  align-items:center;
  justify-content:center;
  border:0;
  background:var(--bg-elevated);
  color:var(--text-primary);
  border-radius:8px;
  cursor:pointer;
  z-index:99;
  font-size:20px;
}

/* Main content – scrollable, Spotify-style */
.main-content{
  flex:1;
  margin-left:232px;
  min-height:calc(100vh - 90px);
  background:var(--bg-1);
  overflow-y:auto;
}
.main-inner{
  padding:0 32px 32px;
  min-height:100%;
}
.view-section.hidden{display:none}

/* Page header – gradient strip like Spotify */
.page-header{
  background:linear-gradient(180deg, var(--bg-3) 0%, var(--bg-1) 100%);
  padding:24px 0 32px;
  margin:0 -32px 24px -32px;
  padding-left:32px;
  padding-right:32px;
}
.page-title{
  font-size:32px;
  font-weight:700;
  letter-spacing:-0.5px;
  margin:0;
  color:var(--text-primary);
}
.playlist-page-header .playlist-header-content{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
}
.clear-playlist-btn{
  padding:8px 20px;
  border-radius:20px;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  transition:background 0.2s, color 0.2s, transform 0.2s;
}
.clear-playlist-btn:hover{
  color:var(--text-primary);
  background:rgba(255,255,255,0.1);
  transform:scale(1.02);
}

/* Content section */
.content-section{
  margin-top:0;
}
.track-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(180px, 1fr));
  gap:24px;
  margin-bottom:32px;
}
.note{
  color:var(--text-secondary);
  font-size:14px;
  margin:24px 0 0;
}

/* Track cards – Spotify-style with play on hover */
.track{
  background:var(--bg-elevated);
  border-radius:8px;
  padding:16px;
  transition:background 0.2s, transform 0.2s;
  cursor:pointer;
  position:relative;
}
.track:hover{
  background:var(--card-hover);
  transform:translateY(-4px);
}
.track.playing{
  background:rgba(0, 212, 255, 0.12);
  box-shadow:0 0 0 1px rgba(0, 212, 255, 0.3);
}
.track.playing .track-artwork-wrap{
  box-shadow:0 0 0 2px var(--accent);
}
.track-artwork-wrap{
  position:relative;
  width:100%;
  aspect-ratio:1;
  margin-bottom:16px;
  border-radius:8px;
  overflow:hidden;
  background:linear-gradient(135deg, var(--bg-3) 0%, var(--accent-secondary) 50%, var(--accent) 100%);
}
.track-artwork-wrap .track-artwork-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.track-artwork-placeholder{
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:48px;
  color:rgba(255,255,255,0.5);
}
.track:hover .track-play-overlay{
  opacity:1;
}
.track-play-overlay{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,0.5);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  transition:opacity 0.2s;
}
.track-play-overlay .play-circle{
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--accent);
  color:var(--bg-1);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  border:none;
  cursor:pointer;
  transform:translateY(8px);
  transition:transform 0.2s, background 0.2s;
  box-shadow:0 8px 24px rgba(0,0,0,0.4);
}
.track:hover .track-play-overlay .play-circle{
  transform:translateY(0);
}
.track-play-overlay .play-circle:hover{
  background:var(--accent-hover);
  transform:scale(1.08);
}
.track-content{
  min-height:62px;
}
.meta strong{
  display:block;
  font-size:16px;
  font-weight:600;
  color:var(--text-primary);
  margin-bottom:4px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.meta .small{
  font-size:14px;
  color:var(--text-secondary);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.controls{
  display:flex;
  align-items:center;
  gap:8px;
  justify-content:flex-end;
  margin-top:12px;
}
.controls button{
  width:36px;
  height:36px;
  border-radius:50%;
  border:0;
  background:var(--accent);
  color:var(--bg-1);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  transition:background 0.2s, transform 0.2s;
}
.controls button:hover{
  background:var(--accent-hover);
  transform:scale(1.08);
}
.controls .add-btn{
  background:transparent;
  border:1px solid var(--text-secondary);
  color:var(--text-primary);
  font-size:18px;
}
.controls .add-btn:hover{
  border-color:var(--text-primary);
  color:var(--text-primary);
}
.controls .remove-btn{
  background:transparent;
  border:1px solid rgba(255,100,100,0.6);
  color:#f87171;
  font-size:20px;
  line-height:1;
}
.controls .remove-btn:hover{
  border-color:#f87171;
  color:#fca5a5;
}
.controls .info-btn{
  background:transparent;
  border:1px solid var(--text-secondary);
  color:var(--text-secondary);
  font-size:14px;
  font-weight:600;
}
.controls .info-btn:hover{
  border-color:var(--text-primary);
  color:var(--text-primary);
}

/* Song page */
.song-page-header{
  margin-bottom:24px;
  padding:0;
}
.song-page-back{
  padding:8px 0;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:color 0.2s;
}
.song-page-back:hover{
  color:var(--text-primary);
}
.song-page-content{
  max-width:480px;
  margin:0 auto;
  text-align:center;
}
.song-page-artwork{
  width:100%;
  max-width:280px;
  aspect-ratio:1;
  margin:0 auto 24px;
  border-radius:12px;
  overflow:hidden;
  background:linear-gradient(135deg, var(--bg-3) 0%, var(--accent-secondary) 50%, var(--accent) 100%);
  display:flex;
  align-items:center;
  justify-content:center;
}
.song-page-artwork .song-page-artwork-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.song-page-artwork-placeholder{
  font-size:80px;
  color:rgba(255,255,255,0.4);
}
.song-page-title{
  font-size:28px;
  font-weight:700;
  letter-spacing:-0.5px;
  margin:0 0 8px;
  color:var(--text-primary);
  line-height:1.2;
}
.song-page-artist{
  font-size:18px;
  color:var(--text-secondary);
  margin:0 0 24px;
}
.song-page-details{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:8px 24px;
  justify-content:center;
  margin:0 0 32px;
  text-align:left;
}
.song-page-details dt{
  color:var(--text-secondary);
  font-size:13px;
  font-weight:600;
  margin:0;
}
.song-page-details dd{
  margin:0;
  font-size:14px;
  color:var(--text-primary);
}
.song-page-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:center;
}
.song-page-play-btn{
  padding:12px 28px;
  border-radius:24px;
  border:0;
  background:var(--accent);
  color:var(--bg-1);
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:background 0.2s, transform 0.2s;
}
.song-page-play-btn:hover{
  background:var(--accent-hover);
  transform:scale(1.03);
}
.song-page-add-btn{
  padding:12px 24px;
  border-radius:24px;
  border:2px solid var(--text-secondary);
  background:transparent;
  color:var(--text-primary);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:border-color 0.2s, color 0.2s, transform 0.2s;
}
.song-page-add-btn:hover{
  border-color:var(--text-primary);
  transform:scale(1.03);
}

/* Empty playlist */
.empty-playlist{
  text-align:center;
  padding:64px 24px;
  color:var(--text-secondary);
}
.empty-playlist p{margin:0 0 8px;font-size:16px;font-weight:600;color:var(--text-primary)}
.empty-playlist .empty-sub{font-size:14px;font-weight:400;color:var(--text-secondary)}

/* Fixed bottom player – Spotify style */
.player-bar{
  position:fixed;
  bottom:0;
  left:0;
  right:0;
  height:90px;
  background:var(--player-bg);
  border-top:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  z-index:1000;
  grid-template-columns:1fr 2fr 1fr;
}
.player-info{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:180px;
  flex:0 0 30%;
}
.player-info-artwork{
  width:56px;
  height:56px;
  background:linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  border-radius:4px;
  flex-shrink:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  color:rgba(255,255,255,0.6);
  overflow:hidden;
}
.player-info-artwork .player-artwork-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.now-playing{min-width:0;flex:1}
.now{
  font-size:14px;
  font-weight:600;
  color:var(--text-primary);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  margin-bottom:2px;
}
.artist-name{
  font-size:12px;
  color:var(--text-secondary);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.player-center{
  flex:1;
  max-width:722px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  padding:0 16px;
}
.player-controls-main{
  display:flex;
  align-items:center;
  gap:16px;
}
.player-controls-main button{
  width:32px;
  height:32px;
  border-radius:50%;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  transition:color 0.2s, transform 0.2s;
}
.player-controls-main button:hover{
  color:var(--text-primary);
  transform:scale(1.1);
}
.player-controls-main #playBtn{
  width:40px;
  height:40px;
  background:var(--text-primary);
  color:var(--bg-1);
  font-size:16px;
}
.player-controls-main #playBtn:hover{
  background:var(--text-primary);
  transform:scale(1.08);
}
.progress-container{
  display:flex;
  align-items:center;
  gap:8px;
  width:100%;
}
.progress{
  flex:1;
  height:4px;
  background:var(--border);
  border-radius:2px;
  overflow:hidden;
  cursor:pointer;
  position:relative;
}
.progress:hover{background:rgba(255,255,255,0.2)}
.progress-filled{
  width:0%;
  height:100%;
  background:var(--accent);
  border-radius:2px;
  transition:width 0.05s linear;
}
.progress-handle{
  position:absolute;
  right:0;
  top:50%;
  transform:translate(50%,-50%);
  width:12px;
  height:12px;
  background:var(--text-primary);
  border-radius:50%;
  opacity:0;
  transition:opacity 0.15s;
  box-shadow:0 2px 4px rgba(0,0,0,0.3);
}
.progress:hover .progress-handle{opacity:1}
.time{
  font-size:11px;
  color:var(--text-secondary);
  min-width:40px;
  text-align:center;
  font-variant-numeric:tabular-nums;
}
.player-right-actions{
  flex:0 0 30%;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:8px;
}
#volumeBtn{
  width:32px;
  height:32px;
  border-radius:50%;
  border:0;
  background:transparent;
  color:var(--text-secondary);
  cursor:pointer;
  font-size:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:color 0.2s;
}
#volumeBtn:hover{color:var(--text-primary)}
#volumeSlider{
  width:93px;
  height:4px;
  -webkit-appearance:none;
  appearance:none;
  background:var(--border);
  border-radius:2px;
  outline:none;
}
#volumeSlider::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:12px;
  height:12px;
  background:var(--text-primary);
  border-radius:50%;
  cursor:pointer;
}
#volumeSlider::-moz-range-thumb{
  width:12px;
  height:12px;
  background:var(--text-primary);
  border-radius:50%;
  cursor:pointer;
  border:none;
}

audio#player{display:none}

/* Notification */
.notification{
  position:fixed;
  bottom:100px;
  left:50%;
  transform:translateX(-50%) translateY(10px);
  background:var(--bg-elevated);
  padding:12px 24px;
  border-radius:8px;
  color:var(--text-primary);
  font-size:14px;
  font-weight:500;
  opacity:0;
  transition:opacity 0.25s, transform 0.25s;
  z-index:1001;
  box-shadow:0 4px 24px rgba(0,0,0,0.5);
}
.notification.show{
  opacity:1;
  transform:translateX(-50%) translateY(0);
}

/* Mobile */
#menu-backdrop{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.6);
  z-index:998;
}

@media (max-width:900px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform 0.3s;
    box-shadow:none;
  }
  .sidebar.mobile-open{
    transform:translateX(0);
    box-shadow:4px 0 24px rgba(0,0,0,0.5);
  }
  .main-content{margin-left:0;padding-top:0}
  .sidebar-hamburger{display:flex}
  .app-layout{padding-top:60px}
  .track-grid{
    grid-template-columns:repeat(auto-fill, minmax(130px, 1fr));
    gap:12px;
  }
  .track{padding:12px}
  .track-artwork-wrap{margin-bottom:10px}
  .track-artwork-placeholder{font-size:36px}
  .track-play-overlay .play-circle{width:44px;height:44px;font-size:18px}
  .meta strong{font-size:14px}
  .meta .small{font-size:12px}
  .controls button{width:32px;height:32px;font-size:12px}
  .page-header{padding:20px 0 24px;margin:0 -24px 20px -24px;padding-left:24px;padding-right:24px}
  .main-inner{padding:0 24px 24px}
  .page-title{font-size:26px}
  .player-bar{flex-wrap:wrap;height:auto;padding:12px;gap:8px}
  .player-info{flex:1 1 100%}
  .player-center{flex:1 1 100%;max-width:none}
  .player-right-actions{flex:1 1 100%;justify-content:center}
}

@media (max-width:600px){
  .track-grid{
    grid-template-columns:repeat(auto-fill, minmax(100px, 1fr));
    gap:10px;
  }
  .main-inner{padding:0 16px 16px}
  .track{padding:10px}
  .track-artwork-wrap{margin-bottom:8px}
  .track-artwork-placeholder{font-size:28px}
  .track-play-overlay .play-circle{width:36px;height:36px;font-size:14px}
  .meta strong{font-size:13px}
  .meta .small{font-size:11px}
  .controls button{width:28px;height:28px;font-size:11px}
}