/* ═══════════════════════════════════════════════════════
   Ember — Fire-themed Music Player Styles
   Dark base · Orange/Yellow fire accents · Glassmorphism
   ═══════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────── */
:root {
  /* Background layers */
  --bg:          #0d0b10;
  --bg-2:        #13101a;
  --bg-3:        #1b1724;

  /* Glass surfaces */
  --glass:       rgba(22, 18, 30, 0.75);
  --glass-hover: rgba(255, 107, 26, 0.07);
  --glass-active:rgba(255, 107, 26, 0.14);

  /* Borders */
  --border:      rgba(255, 107, 26, 0.12);
  --border-mid:  rgba(255, 107, 26, 0.25);
  --border-hot:  rgba(255, 107, 26, 0.55);

  /* Fire palette */
  --ember:       #FF6B1A;
  --ember-dim:   #cc4d0e;
  --amber:       #FF9500;
  --gold:        #FFD700;
  --glow-color:  rgba(255, 107, 26, 0.35);

  /* Glows */
  --glow-sm:     0 0  8px rgba(255, 107, 26, 0.40);
  --glow-md:     0 0 20px rgba(255, 107, 26, 0.40);
  --glow-lg:     0 0 40px rgba(255, 107, 26, 0.50), 0 0 80px rgba(255, 107, 26, 0.20);

  /* Text */
  --text:        #F2EDDE;
  --text-2:      #9B9083;
  --text-3:      #5A5048;

  /* Layout */
  --sidebar-w:   240px;
  --player-h:    90px;
  --radius:      12px;
  --radius-sm:   8px;
  --radius-lg:   18px;
  --transition:  0.2s ease;
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

button { background: none; border: none; cursor: pointer; font: inherit; color: inherit; }
input  { font: inherit; color: inherit; background: none; border: none; outline: none; }
svg    { display: block; flex-shrink: 0; }

/* ── App shell ──────────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 1fr;
  height: calc(100vh - var(--player-h));

  /* Subtle fire gradient in background */
  background:
    radial-gradient(ellipse 60% 50% at 15% 60%, rgba(255,107,26,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 85% 20%, rgba(255,165,0,0.04) 0%, transparent 60%),
    var(--bg);
}

/* ── Sidebar ────────────────────────────────────────── */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px 20px;
}
.brand-flame { width: 28px; height: 34px; filter: drop-shadow(0 0 8px rgba(255,180,0,0.7)); }
.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--ember) 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Nav */
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 2px; }

.nav-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 8px 10px 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  width: 100%;
  text-align: left;
}
.nav-item svg { width: 18px; height: 18px; }
.nav-item:hover {
  background: var(--glass-hover);
  color: var(--text);
}
.nav-item.active {
  background: var(--glass-active);
  color: var(--ember);
  box-shadow: var(--glow-sm);
}

.nav-divider { height: 1px; background: var(--border); margin: 10px 0; }

.playlists-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-right: 4px;
}
.playlists-nav { display: flex; flex-direction: column; gap: 2px; }

.playlist-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  width: 100%;
  text-align: left;
  transition: background var(--transition), color var(--transition);
}
.playlist-nav-item svg { width: 14px; height: 14px; color: var(--text-3); flex-shrink: 0; }
.playlist-nav-item:hover { background: var(--glass-hover); color: var(--text); }
.playlist-nav-item.active { background: var(--glass-active); color: var(--ember); }
.playlist-nav-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.playlist-nav-wrap .playlist-nav-item { flex: 1; }
.playlist-delete-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  color: var(--text-3);
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}
.playlist-delete-btn svg { width: 13px; height: 13px; }
.playlist-delete-btn:hover { background: rgba(255,85,85,0.15); color: #ff5555; }
.playlist-nav-wrap:hover .playlist-delete-btn { display: flex; }

/* Sidebar footer */
.sidebar-footer { padding-top: 12px; }

.btn-import {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--ember) 0%, var(--amber) 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: box-shadow var(--transition), transform var(--transition);
}
.btn-import svg { width: 16px; height: 16px; }
.btn-import:hover { box-shadow: var(--glow-md); transform: translateY(-1px); }
.btn-import:active { transform: translateY(0); }

/* Icon button */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  color: var(--text-2);
  transition: background var(--transition), color var(--transition);
}
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon:hover { background: var(--glass-hover); color: var(--ember); }

/* ── Main ───────────────────────────────────────────── */
.main {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px 16px;
  gap: 16px;
  flex-shrink: 0;
}
.main-header-left { display: flex; align-items: baseline; gap: 12px; }
.view-title { font-size: 26px; font-weight: 700; letter-spacing: -0.4px; }
.track-count { font-size: 13px; color: var(--text-2); }

.main-header-right { display: flex; align-items: center; gap: 12px; }

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box svg { width: 16px; height: 16px; color: var(--text-2); flex-shrink: 0; }
.search-box input {
  width: 200px;
  font-size: 14px;
  color: var(--text);
}
.search-box input::placeholder { color: var(--text-3); }
.search-box:focus-within {
  border-color: var(--border-mid);
  box-shadow: var(--glow-sm);
}

.btn-play-all {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background: var(--glass-active);
  border: 1px solid var(--border-hot);
  color: var(--ember);
  font-size: 14px;
  font-weight: 600;
  transition: box-shadow var(--transition), background var(--transition);
}
.btn-play-all svg { width: 16px; height: 16px; }
.btn-play-all:hover { background: rgba(255,107,26,0.22); box-shadow: var(--glow-sm); }

/* ── Drop overlay ───────────────────────────────────── */
.drop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13, 11, 16, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  place-items: center;
  z-index: 50;
  border: 2px dashed var(--ember);
  border-radius: var(--radius);
  margin: 8px;
}
.drop-overlay.active { display: grid; }
.drop-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--ember);
}
.drop-message svg { width: 48px; height: 48px; filter: drop-shadow(var(--glow-md)); }
.drop-message span { font-size: 18px; font-weight: 600; }

/* ── Content area ───────────────────────────────────── */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 0 28px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.content-area::-webkit-scrollbar { width: 6px; }
.content-area::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }

/* ── Empty state ────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 100%;
  min-height: 360px;
  text-align: center;
  padding: 40px;
}
.empty-flame {
  animation: flicker 3s ease-in-out infinite;
}
.empty-flame svg { width: 80px; height: 96px; filter: drop-shadow(0 0 24px rgba(255,165,0,0.6)); }

@keyframes flicker {
  0%, 100% { transform: scale(1)    rotate(-1deg); opacity: 1; }
  25%       { transform: scale(1.03) rotate(1.5deg); opacity: 0.95; }
  50%       { transform: scale(0.97) rotate(-0.5deg); opacity: 1; }
  75%       { transform: scale(1.02) rotate(1deg); opacity: 0.97; }
}

.empty-state h2 { font-size: 22px; font-weight: 700; }
.empty-state p  { font-size: 14px; color: var(--text-2); max-width: 320px; }

.btn-import-large {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--ember) 0%, var(--amber) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-top: 8px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.btn-import-large svg { width: 18px; height: 18px; }
.btn-import-large:hover { box-shadow: var(--glow-lg); transform: translateY(-2px); }

/* ── Track list ─────────────────────────────────────── */
.track-list-wrap { display: flex; flex-direction: column; }

.track-list-header {
  display: grid;
  grid-template-columns: 40px 42px 1fr 1fr 50px;
  align-items: center;
  padding: 6px 12px 6px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text-3);
}
.col-num { text-align: right; padding-right: 16px; }
.col-art {}
.col-title {}
.col-album { display: none; }
.col-dur { text-align: right; padding-right: 6px; }

@media (min-width: 700px) { .col-album { display: block; } }

/* Track item */
.track-item {
  display: grid;
  grid-template-columns: 40px 42px 1fr 1fr 50px;
  align-items: center;
  padding: 5px 12px 5px 0;
  border-radius: var(--radius-sm);
  gap: 0;
  cursor: pointer;
  position: relative;
  transition: background var(--transition);
  border: 1px solid transparent;
}
.track-item:hover { background: var(--glass-hover); }
.track-item.playing {
  background: var(--glass-active);
  border-color: var(--border);
}
.track-item.playing .track-title { color: var(--ember); }

.track-num {
  text-align: right;
  padding-right: 16px;
  font-size: 13px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

/* Animated waveform for playing track */
.waveform {
  display: none;
  align-items: flex-end;
  gap: 2px;
  height: 16px;
  justify-content: flex-end;
  padding-right: 14px;
}
.waveform span {
  display: block;
  width: 3px;
  background: var(--ember);
  border-radius: 2px;
  animation: wave 0.8s ease-in-out infinite;
}
.waveform span:nth-child(1) { height: 60%; animation-delay: 0s; }
.waveform span:nth-child(2) { height: 100%; animation-delay: 0.15s; }
.waveform span:nth-child(3) { height: 45%; animation-delay: 0.3s; }

@keyframes wave {
  0%, 100% { transform: scaleY(0.4); }
  50%       { transform: scaleY(1); }
}

.track-item.playing .track-num  { display: none; }
.track-item.playing .waveform   { display: flex; }

.track-art {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  margin-right: 8px;
}
.track-art img { width: 100%; height: 100%; object-fit: cover; }
.track-art svg { width: 16px; height: 16px; }

.track-info { min-width: 0; }
.track-title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
  transition: color var(--transition);
}
.track-artist {
  font-size: 12px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}
.track-album {
  font-size: 13px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: none;
}
@media (min-width: 700px) { .track-album { display: block; } }

.track-dur {
  font-size: 13px;
  color: var(--text-2);
  text-align: right;
  padding-right: 6px;
  font-variant-numeric: tabular-nums;
}

/* ── Group grid (albums/artists) ────────────────────── */
.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  padding-top: 8px;
}
.group-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.group-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4), var(--glow-sm);
  border-color: var(--border-mid);
}
.group-art {
  aspect-ratio: 1;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  overflow: hidden;
}
.group-art img { width: 100%; height: 100%; object-fit: cover; }
.group-art svg { width: 40px; height: 40px; }
.group-info { padding: 10px 12px; }
.group-name {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.group-meta { font-size: 11px; color: var(--text-2); margin-top: 2px; }

/* ── Import progress ────────────────────────────────── */
.import-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 0;
}
.import-progress-bar {
  width: 320px;
  max-width: 90%;
  height: 4px;
  background: var(--bg-3);
  border-radius: 4px;
  overflow: hidden;
}
.import-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--gold));
  border-radius: 4px;
  width: 0%;
  transition: width 0.2s ease;
}
#import-progress-label { font-size: 13px; color: var(--text-2); }

/* ── Player bar ─────────────────────────────────────── */
.player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--player-h);
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  background: rgba(13, 11, 16, 0.88);
  backdrop-filter: blur(32px) saturate(1.6);
  -webkit-backdrop-filter: blur(32px) saturate(1.6);
  border-top: 1px solid var(--border);
  z-index: 100;
}

/* Player info */
.player-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.player-artwork {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.player-artwork.has-art { border-color: var(--border-mid); box-shadow: var(--glow-sm); }
.player-artwork img { width: 100%; height: 100%; object-fit: cover; }
.player-artwork svg { width: 22px; height: 22px; }
.player-meta { min-width: 0; }
.player-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.player-artist {
  font-size: 12px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* Player controls */
.player-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.ctrl-row { display: flex; align-items: center; gap: 8px; }

.ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text-2);
  transition: color var(--transition), background var(--transition), box-shadow var(--transition);
}
.ctrl-btn svg { width: 20px; height: 20px; }
.ctrl-btn:hover { color: var(--text); background: var(--glass-hover); }
.ctrl-btn.active { color: var(--ember); }

.play-btn {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--ember) 0%, var(--amber) 100%);
  color: #fff !important;
  box-shadow: var(--glow-sm);
}
.play-btn:hover { box-shadow: var(--glow-md); transform: scale(1.06); }
.play-btn svg { width: 22px; height: 22px; }

/* Progress */
.progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}
.time-label { font-size: 11px; color: var(--text-2); font-variant-numeric: tabular-nums; width: 34px; }
#time-current { text-align: right; }
#time-total   { text-align: left; }

.progress-track {
  flex: 1;
  height: 4px;
  background: var(--bg-3);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  overflow: visible;
  transition: height var(--transition);
}
.progress-track:hover { height: 6px; }
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--gold));
  border-radius: 4px;
  width: 0%;
  pointer-events: none;
}
.progress-thumb {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%) scale(0);
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--glow-sm);
  pointer-events: none;
  transition: transform 0.15s ease;
}
.progress-track:hover .progress-thumb { transform: translate(-50%, -50%) scale(1); }

/* Volume */
.player-volume {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-end;
}
.vol-btn { width: 32px; height: 32px; }
.vol-btn svg { width: 18px; height: 18px; }

.volume-track {
  width: 100px;
  height: 4px;
  background: var(--bg-3);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  overflow: visible;
  transition: height var(--transition);
}
.volume-track:hover { height: 6px; }
.volume-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--gold));
  border-radius: 4px;
  pointer-events: none;
}

/* ── Modals ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  z-index: 200;
}
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 28px;
  min-width: 320px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 24px 64px rgba(0,0,0,0.6), var(--glow-sm);
}
.modal h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--text) 0%, var(--amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.modal input[type="text"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.modal input[type="text"]:focus {
  border-color: var(--border-hot);
  box-shadow: var(--glow-sm);
}
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 18px;
}
.btn-primary {
  padding: 9px 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--ember), var(--amber));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  transition: box-shadow var(--transition);
}
.btn-primary:hover { box-shadow: var(--glow-md); }
.btn-secondary {
  padding: 9px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 14px;
  transition: background var(--transition), color var(--transition);
}
.btn-secondary:hover { background: var(--glass-hover); color: var(--text); }

.playlist-choices { display: flex; flex-direction: column; gap: 6px; max-height: 280px; overflow-y: auto; }
.playlist-choice-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  transition: border-color var(--transition), background var(--transition);
}
.playlist-choice-btn:hover { border-color: var(--border-hot); background: var(--glass-active); color: var(--ember); }
.playlist-choice-btn svg { width: 16px; height: 16px; color: var(--text-2); }

/* ── Context menu ───────────────────────────────────── */
.context-menu {
  position: fixed;
  background: var(--bg-2);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  padding: 6px;
  min-width: 190px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), var(--glow-sm);
  z-index: 300;
  animation: ctx-in 0.12s ease;
}
@keyframes ctx-in {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}
.ctx-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  width: 100%;
  text-align: left;
  color: var(--text);
  transition: background var(--transition);
}
.ctx-item svg { width: 15px; height: 15px; color: var(--text-2); }
.ctx-item:hover { background: var(--glass-hover); }
.ctx-item:hover svg { color: var(--ember); }
.ctx-danger { color: #ff5555; }
.ctx-danger:hover { background: rgba(255,85,85,0.1); }
.ctx-danger svg { color: #ff5555; }
.ctx-divider { height: 1px; background: var(--border); margin: 4px 0; }

/* ── Toast notification ─────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(var(--player-h) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-2);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 400;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Scrollbar ──────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-mid); }

/* ── Utility ────────────────────────────────────────── */
.hidden { display: none !important; }

/* ═══════════════════════════════════════════════════════
   MOBILE ADDITIONS — track action button & mini progress
   ═══════════════════════════════════════════════════════ */

/* ── Track action button (•••) ───────────────────────── */
.track-action-btn {
  display: none;
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-2);
  flex-shrink: 0;
  transition: color var(--transition), background var(--transition);
  z-index: 1;
}
.track-action-btn svg { width: 18px; height: 18px; }
.track-action-btn:hover { color: var(--ember); background: var(--glass-hover); }
.track-item:hover .track-action-btn { display: flex; }

/* ── Mini progress bar (mobile top strip) ────────────── */
.player-mini-progress {
  display: none;
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--bg-3);
  cursor: pointer;
  z-index: 2;
}
.player-mini-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--gold));
  width: 0%;
  pointer-events: none;
  border-radius: 0 2px 2px 0;
}

/* ── Sidebar close button (mobile only) ─────────────── */
.sidebar-close {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text-2);
  flex-shrink: 0;
  transition: color var(--transition), background var(--transition);
}
.sidebar-close svg { width: 20px; height: 20px; }
.sidebar-close:hover { color: var(--text); background: var(--glass-hover); }

/* ── Hamburger menu button (mobile only) ─────────────── */
.btn-menu {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  flex-shrink: 0;
  transition: color var(--transition), background var(--transition);
}
.btn-menu svg { width: 22px; height: 22px; }
.btn-menu:hover { color: var(--ember); background: var(--glass-hover); }

/* ── Sidebar overlay backdrop ────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 140;
}
.sidebar-overlay.active { display: block; }

/* ── Mobile bottom nav ───────────────────────────────── */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--mobile-nav-h, 60px);
  background: rgba(13, 11, 16, 0.96);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-top: 1px solid var(--border);
  z-index: 120;
  justify-content: space-around;
  align-items: center;
  padding: 0 4px;
}
.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
  min-width: 60px;
  transition: color var(--transition);
}
.mobile-nav-item svg { width: 22px; height: 22px; }
.mobile-nav-item.active { color: var(--ember); }
.mobile-nav-item:hover { color: var(--text); }

/* ── Action sheet (bottom sheet) ─────────────────────── */
.action-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 350;
  display: flex;
  align-items: flex-end;
  animation: fade-in 0.18s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.action-sheet {
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  background: var(--bg-2);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border: 1px solid var(--border-mid);
  border-bottom: none;
  padding: 10px 16px 24px;
  animation: sheet-up 0.22s cubic-bezier(0.32, 0.72, 0, 1);
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}
@keyframes sheet-up {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}
.action-sheet-handle {
  width: 36px; height: 4px;
  background: var(--border-mid);
  border-radius: 4px;
  margin: 0 auto 16px;
}
.action-sheet-track-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 4px 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
.action-sheet-art {
  width: 46px; height: 46px;
  border-radius: 8px;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.action-sheet-art img { width: 100%; height: 100%; object-fit: cover; }
.action-sheet-art svg { width: 20px; height: 20px; }
.action-sheet-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.action-sheet-artist {
  font-size: 13px;
  color: var(--text-2);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.action-sheet-items { display: flex; flex-direction: column; gap: 2px; }
.action-sheet-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  width: 100%;
  text-align: left;
  transition: background var(--transition);
}
.action-sheet-item svg { width: 20px; height: 20px; color: var(--text-2); flex-shrink: 0; }
.action-sheet-item:hover, .action-sheet-item:active { background: var(--glass-hover); }
.action-sheet-item:hover svg { color: var(--ember); }
.action-sheet-danger { color: #ff5555; }
.action-sheet-danger svg { color: #ff5555; }
.action-sheet-danger:hover, .action-sheet-danger:active { background: rgba(255,85,85,0.1); }
.action-sheet-divider { height: 1px; background: var(--border); margin: 4px 0; }
.action-sheet-cancel {
  display: block;
  width: 100%;
  padding: 14px;
  margin-top: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  transition: background var(--transition), color var(--transition);
}
.action-sheet-cancel:hover, .action-sheet-cancel:active { background: var(--glass-hover); color: var(--text); }

/* ═══════════════════════════════════════════════════════
   RESPONSIVE — Mobile (≤ 768px)
   ═══════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root {
    --mobile-nav-h: 60px;
    --player-h-mobile: 66px;
  }

  /* ── App shell ── */
  .app {
    grid-template-columns: 1fr;
    height: calc(100dvh - var(--player-h-mobile) - var(--mobile-nav-h));
  }

  /* ── Sidebar becomes a slide-in drawer ── */
  .sidebar {
    position: fixed;
    top: 0; bottom: 0; left: 0;
    width: min(280px, 80vw);
    z-index: 150;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
    padding: 16px 12px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-close { display: flex; }
  .sidebar .brand { flex-direction: row-reverse; justify-content: flex-end; gap: 8px; padding-bottom: 16px; }

  /* ── Main area full width ── */
  .main { width: 100%; }
  .main-header { padding: 14px 16px 10px; gap: 10px; flex-wrap: wrap; }
  .main-header-left { gap: 8px; }
  .main-header-right { gap: 8px; width: 100%; }
  .search-box { flex: 1; }
  .search-box input { width: 100%; }
  .btn-play-all { white-space: nowrap; }
  .view-title { font-size: 20px; }

  /* ── Show hamburger ── */
  .btn-menu { display: flex; }

  /* ── Content area ── */
  .content-area { padding: 0 12px 16px; }

  /* ── Track list on mobile ── */
  .track-list-header { display: none; }
  .track-item {
    grid-template-columns: 40px 44px 1fr;
    padding: 7px 44px 7px 0;
  }
  .track-num { font-size: 12px; padding-right: 10px; }
  .track-album { display: none !important; }
  .track-dur { display: none; }
  /* always show action button on mobile */
  .track-action-btn { display: flex !important; }
  /* shift action btn to safe right position */
  .track-action-btn { right: 4px; }

  /* ── Group grid ── */
  .group-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }

  /* ── Player bar — compact ── */
  .player-bar {
    position: fixed;
    bottom: var(--mobile-nav-h);
    height: var(--player-h-mobile);
    grid-template-columns: 1fr auto;
    grid-template-rows: 1fr;
    padding: 0 12px;
    gap: 8px;
  }
  .player-mini-progress { display: block; }
  .player-volume { display: none; }
  .player-controls {
    flex-direction: row;
    gap: 4px;
  }
  .player-controls .progress-row { display: none; }
  .player-controls .ctrl-row { gap: 2px; }
  #btn-shuffle, #btn-repeat { display: none; }
  .ctrl-btn { width: 40px; height: 40px; }
  .play-btn { width: 44px; height: 44px; }
  .player-artwork { width: 44px; height: 44px; }
  .player-title { font-size: 13px; }
  .player-artist { font-size: 11px; }

  /* ── Toast above mobile nav ── */
  .toast { bottom: calc(var(--player-h-mobile) + var(--mobile-nav-h) + 10px); }

  /* ── Show mobile nav ── */
  .mobile-nav { display: flex; }

  /* ── Modals full-width on small screens ── */
  .modal { min-width: unset; width: 92%; }

  /* ── Empty state ── */
  .empty-state { padding: 24px 20px; min-height: 280px; }
  .empty-flame svg { width: 60px; height: 72px; }
  .empty-state h2 { font-size: 18px; }
}

/* ── Extra small phones ── */
@media (max-width: 380px) {
  .group-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .main-header { padding: 10px 12px 8px; }
}