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

:root {
  --bg: var(--ui-bg);
  --surface: var(--ui-surface);
  --surface2: var(--ui-surface-3);
  --border: var(--ui-border);
  --text: var(--ui-text);
  --muted: var(--ui-muted);
  --accent: var(--ui-accent);
  --accent2: var(--ui-accent-2);
  --ok: var(--ui-ok);
  --warn: var(--ui-warn);
  --radius: var(--ui-radius);
}

body { font-family: var(--ui-font); background: var(--bg); color: var(--text); height: calc(100vh - var(--ui-bar-h, 0px)); overflow: hidden; }

.app { display: grid; grid-template-columns: 240px 1fr; height: calc(100vh - var(--ui-bar-h, 0px)); }

/* ── Sidebar ── */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}
.sidebar-head h1 { font-size: 1.15rem; font-weight: 700; }
.accent { color: var(--accent2); }
.section-label { font-size: .68rem; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin-bottom: 8px; font-weight: 600; }

.sidebar-btn {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 10px 12px; border-radius: 8px;
  background: none; border: none; color: var(--muted);
  font-size: .85rem; font-weight: 500; cursor: pointer;
  transition: all .15s; text-align: left;
}
.sidebar-btn:hover { background: rgba(255,255,255,.04); color: var(--text); }
.sidebar-btn.active { background: var(--accent); color: #fff; }
.sidebar-btn i { width: 18px; text-align: center; }

.import-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-radius: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--accent2); font-size: .82rem; font-weight: 500;
  cursor: pointer; transition: border-color .2s;
}
.import-btn:hover { border-color: var(--accent); }

.drop-zone {
  margin-top: 10px; padding: 24px 16px; border-radius: 10px;
  border: 2px dashed var(--border); text-align: center;
  color: var(--muted); font-size: .78rem;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  transition: all .2s;
}
.drop-zone.over { border-color: var(--accent); color: var(--accent2); background: rgba(var(--ui-accent-rgb),.06); }

.sidebar-stats { margin-top: auto; font-size: .75rem; color: var(--muted); text-align: center; }

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

/* Visualizer */
.viz-container {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, rgba(var(--ui-accent-rgb),.08), rgba(59,130,246,.06));
  flex-shrink: 0;
}
#visualizer { width: 100%; height: 100%; display: block; }
.now-playing {
  position: absolute; bottom: 16px; left: 24px;
  display: flex; align-items: center; gap: 14px;
}
.np-art {
  width: 56px; height: 56px; border-radius: 10px;
  background: var(--surface2); display: flex;
  align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--accent2);
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.np-title { font-weight: 700; font-size: 1rem; }
.np-artist { color: var(--muted); font-size: .82rem; margin-top: 2px; }

/* Controls */
.controls {
  padding: 14px 24px 10px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.progress-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.time { font-size: .72rem; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 36px; }
.progress-bar {
  flex: 1; -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 2px;
  background: var(--surface2); outline: none; cursor: pointer;
}
.progress-bar::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px;
  border-radius: 50%; background: var(--accent2); cursor: pointer;
}

.buttons-row { display: flex; align-items: center; justify-content: center; gap: 12px; }
.ctrl-btn {
  background: none; border: none; color: var(--muted);
  font-size: 1rem; cursor: pointer; padding: 8px;
  border-radius: 8px; transition: all .15s;
}
.ctrl-btn:hover { color: var(--text); }
.ctrl-btn.active { color: var(--accent2); }
.play-btn {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--accent); color: #fff !important;
  font-size: 1.1rem; display: flex; align-items: center;
  justify-content: center; transition: transform .15s;
}
.play-btn:hover { transform: scale(1.08); }

.vol-group { display: flex; align-items: center; gap: 4px; margin-left: 16px; }
.vol-slider {
  -webkit-appearance: none; appearance: none;
  width: 80px; height: 3px; border-radius: 2px;
  background: var(--surface2); outline: none; cursor: pointer;
}
.vol-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 10px; height: 10px;
  border-radius: 50%; background: var(--accent2);
}

/* Track List */
.track-list-area { flex: 1; overflow: hidden; display: flex; flex-direction: column; }
.tl-header { padding: 12px 24px; flex-shrink: 0; }
.tl-header input {
  width: 100%; padding: 10px 14px; border-radius: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text); font-size: .85rem; outline: none;
}
.tl-header input:focus { border-color: var(--accent); }

.track-list { flex: 1; overflow-y: auto; padding: 0 12px 20px; }
.empty-msg { color: var(--muted); font-size: .85rem; text-align: center; padding: 40px 20px; }

.track-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 8px;
  cursor: pointer; transition: background .15s;
}
.track-item:hover { background: rgba(255,255,255,.04); }
.track-item.playing { background: rgba(var(--ui-accent-rgb),.1); }
.track-item .track-num { width: 24px; text-align: center; font-size: .78rem; color: var(--muted); }
.track-item.playing .track-num { color: var(--accent2); }
.track-item .track-info { flex: 1; min-width: 0; }
.track-item .track-name { font-size: .88rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-item.playing .track-name { color: var(--accent2); }
.track-item .track-dur { font-size: .75rem; color: var(--muted); }
.track-item .btn-fav {
  background: none; border: none; color: var(--muted);
  cursor: pointer; font-size: .9rem; padding: 4px;
}
.track-item .btn-fav.faved { color: #ef4444; }

@media (max-width: 700px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

/* ── Equalizer ── */
.eq-panel {
  flex-direction: column;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface2);
  border-top: 1px solid var(--border);
}
.eq-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.eq-title { font-size: .82rem; font-weight: 700; color: var(--accent); letter-spacing: .04em; }
.eq-presets { display: flex; gap: 6px; flex-wrap: wrap; }
.eq-preset {
  padding: 3px 10px; border-radius: 20px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); font-size: .72rem; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.eq-preset:hover { border-color: var(--accent); color: var(--accent); }
.eq-bands { display: flex; justify-content: space-around; align-items: flex-end; gap: 8px; padding: 6px 0; }
.eq-band { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; }
.eq-db { font-size: .68rem; color: var(--accent2, #22d3ee); font-weight: 700; min-height: 16px; }
.eq-freq { font-size: .68rem; color: var(--muted); }
.eq-slider {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  writing-mode: vertical-lr;
  direction: rtl;
  width: 28px;
  height: 100px;
  cursor: pointer;
  accent-color: var(--accent);
}