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

:root {
  --bg-deep: #000000;
  --bg-main: #0a0a0a;
  --bg-card: #141414;
  --bg-card-hover: #1e1e1e;
  --bg-sidebar: #080808;
  --bg-input: #111111;
  --gold: #ffffff;
  --gold-light: #ffffff;
  --gold-dim: #666666;
  --gold-glow: rgba(255, 255, 255, 0.08);
  --text: #ffffff;
  --text-dim: #999999;
  --text-faint: #555555;
  --rose: #999999;
  --rose-dim: rgba(153, 153, 153, 0.15);
  --green: #cccccc;
  --green-dim: rgba(204, 204, 204, 0.12);
  --danger: #ff4444;
  --font-display: 'Cormorant Garamond', serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

html, body {
  height: 100%;
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── LAYOUT ─────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
}

.header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: var(--bg-main);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  color: var(--gold-light);
  letter-spacing: 0.05em;
}
.logo span { font-weight: 600; font-style: italic; }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.master-volume {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.player-link {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  transition: border-color 0.15s, color 0.15s;
}
.player-link:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.master-volume input[type="range"] {
  -webkit-appearance: none;
  width: 100px;
  height: 4px;
  background: var(--bg-card);
  border-radius: 2px;
  outline: none;
}
.master-volume input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--gold);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
}

/* ── SIDEBAR ────────────────────────────────── */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  overflow-y: auto;
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 0 24px;
  margin-bottom: 16px;
}

.playlist-nav { list-style: none; }

.playlist-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  cursor: pointer;
  transition: all var(--transition);
  border-left: 3px solid transparent;
  position: relative;
}
.playlist-nav-item:hover { background: rgba(255, 255, 255, 0.04); }
.playlist-nav-item.active {
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--gold);
}

.playlist-nav-item .nav-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  background: var(--bg-card);
  color: var(--text-dim);
  flex-shrink: 0;
  transition: all var(--transition);
}
.playlist-nav-item.active .nav-icon {
  background: var(--gold-glow);
  color: var(--gold);
}

.playlist-nav-item .nav-label {
  font-size: 14px; font-weight: 400;
  color: var(--text-dim);
  transition: color var(--transition);
}
.playlist-nav-item.active .nav-label { color: var(--text); font-weight: 500; }

.playlist-nav-item .nav-meta {
  font-size: 11px; color: var(--text-faint); margin-left: auto;
}
.playlist-nav-item.active .nav-meta { color: var(--gold-dim); }

.nav-playing-dot {
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold);
  animation: pulse-dot 1.5s ease infinite;
  display: none;
}
.playlist-nav-item.is-playing .nav-playing-dot { display: block; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── MAIN CONTENT ───────────────────────────── */
.main {
  overflow-y: auto;
  padding: 0;
  position: relative;
}

.playlist-view { padding: 32px; max-width: 1000px; }

.playlist-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 24px;
}

.playlist-title {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 300;
  color: var(--gold-light); line-height: 1.1;
}

.playlist-subtitle { font-size: 13px; color: var(--text-dim); margin-top: 4px; }

.playlist-stats { display: flex; gap: 24px; font-size: 13px; color: var(--text-dim); }
.playlist-stats .stat-value { color: var(--gold); font-weight: 500; }

/* ── CROSSFADE CONTROL ──────────────────────── */
.crossfade-control {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card); border-radius: var(--radius);
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.crossfade-control label {
  font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.08em; white-space: nowrap;
}
.crossfade-control input[type="range"] {
  -webkit-appearance: none; flex: 1; height: 4px;
  background: var(--bg-deep); border-radius: 2px; outline: none; max-width: 200px;
}
.crossfade-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px;
  background: var(--gold); border-radius: 50%; cursor: pointer;
}
.crossfade-value { font-size: 13px; color: var(--gold); font-weight: 500; min-width: 24px; text-align: right; }

/* ── DROP ZONE & YOUTUBE INPUT ──────────────── */
.upload-section {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  align-items: stretch;
}

.drop-zone {
  flex: 1;
  border: 2px dashed var(--gold-dim);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100px;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--gold); background: var(--gold-glow);
}
.drop-zone-icon { font-size: 28px; margin-bottom: 6px; opacity: 0.5; }
.drop-zone-text { font-size: 13px; color: var(--text-dim); }
.drop-zone-text strong { color: var(--gold); }

.youtube-box {
  flex: 1;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.youtube-box-title {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.youtube-box-title .yt-icon {
  color: #999999;
  font-size: 16px;
}

.youtube-input-row {
  display: flex;
  gap: 8px;
}

.youtube-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 8px 14px;
  border-radius: var(--radius);
  outline: none;
}
.youtube-input:focus { border-color: var(--gold); }
.youtube-input::placeholder { color: var(--text-faint); }

.youtube-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--gold-dim);
  color: var(--gold);
  font-family: var(--font-body);
  font-size: 12px;
  padding: 8px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.youtube-btn:hover { background: rgba(255, 255, 255, 0.18); }
.youtube-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.youtube-status {
  font-size: 12px;
  color: var(--text-dim);
  min-height: 16px;
}
.youtube-status.error { color: var(--danger); }

/* ── TRACK LIST ─────────────────────────────── */
.track-list { list-style: none; }

.track-item {
  display: grid;
  grid-template-columns: 28px 36px 1fr auto auto auto auto 36px;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 6px;
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: default;
}
.track-item:hover { background: var(--bg-card-hover); border-color: rgba(255, 255, 255, 0.08); }
.track-item.playing { border-color: var(--gold-dim); background: rgba(255, 255, 255, 0.05); }
.track-item.dragging { opacity: 0.4; }
.track-item.drag-over-top { border-top: 2px solid var(--gold); }
.track-item.drag-over-bottom { border-bottom: 2px solid var(--gold); }

.track-drag-handle {
  cursor: grab; color: var(--text-faint); font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  opacity: 0.5; transition: opacity var(--transition);
}
.track-item:hover .track-drag-handle { opacity: 1; }

.track-number {
  font-size: 13px; color: var(--text-faint); text-align: center;
  font-variant-numeric: tabular-nums;
}
.track-item.playing .track-number { color: var(--gold); }

.track-name {
  font-size: 14px; font-weight: 400; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.track-bpm {
  font-size: 11px; padding: 3px 8px; border-radius: 10px;
  font-weight: 500; letter-spacing: 0.03em; white-space: nowrap;
}
.track-bpm.bpm-unknown { background: rgba(255,255,255,0.05); color: var(--text-faint); }
.track-bpm.bpm-match { background: var(--green-dim); color: var(--green); }
.track-bpm.bpm-close { background: var(--gold-glow); color: var(--gold); }
.track-bpm.bpm-far { background: rgba(255,255,255,0.05); color: var(--text-dim); }

.track-duration {
  font-size: 12px; color: var(--text-dim); font-variant-numeric: tabular-nums;
  min-width: 48px; text-align: right;
}

.track-actions { display: flex; gap: 4px; }

.track-btn {
  background: none; border: none; color: var(--text-faint); cursor: pointer;
  padding: 4px 6px; border-radius: 4px; font-size: 13px;
  transition: all var(--transition); display: flex; align-items: center;
}
.track-btn:hover { color: var(--gold); background: var(--gold-glow); }

.track-remove {
  background: none; border: none; color: var(--text-faint); cursor: pointer;
  font-size: 14px; padding: 4px; border-radius: 4px;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.track-remove:hover { color: var(--danger); background: var(--rose-dim); }

/* ── BPM CONNECTOR ──────────────────────────── */
.bpm-connector {
  display: flex; align-items: center; justify-content: center; height: 6px;
  margin: 0 0 6px 0;
}
.bpm-dot { width: 5px; height: 5px; border-radius: 50%; }
.bpm-dot.match { background: var(--green); }
.bpm-dot.close { background: var(--gold-dim); }

/* ── EMPTY STATE ────────────────────────────── */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-dim); }
.empty-state-icon { font-size: 48px; opacity: 0.3; margin-bottom: 12px; }
.empty-state-text {
  font-family: var(--font-display); font-size: 18px; font-style: italic;
  color: var(--text-faint);
}

/* ── WAVEFORM EDITOR ────────────────────────── */
.editor-overlay {
  position: absolute; inset: 0; background: var(--bg-main); z-index: 10;
  overflow-y: auto; display: none; padding: 32px;
}
.editor-overlay.open { display: block; }

.editor-back {
  display: inline-flex; align-items: center; gap: 6px;
  background: none; border: none; color: var(--text-dim);
  font-family: var(--font-body); font-size: 13px; cursor: pointer;
  padding: 6px 12px; border-radius: var(--radius);
  transition: all var(--transition); margin-bottom: 24px;
}
.editor-back:hover { color: var(--gold); background: var(--gold-glow); }

.editor-title {
  font-family: var(--font-display); font-size: 28px; font-weight: 300;
  color: var(--gold-light); margin-bottom: 8px;
}

.editor-rename {
  display: flex; align-items: center; gap: 12px; margin-bottom: 24px;
}
.editor-rename label {
  font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.editor-rename input {
  flex: 1; max-width: 400px;
  background: var(--bg-card); border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text); font-family: var(--font-body); font-size: 15px;
  padding: 8px 14px; border-radius: var(--radius); outline: none;
}
.editor-rename input:focus { border-color: var(--gold); }

.waveform-container {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 24px; margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
#waveform-editor {
  margin-bottom: 16px;
  cursor: ew-resize;
  padding: 8px 0;
  user-select: none;
}

.editor-trim-controls {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.trim-input-group { display: flex; align-items: center; gap: 8px; }
.trim-input-group label {
  font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.trim-input-group input {
  width: 80px; background: var(--bg-deep);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text); font-family: var(--font-body); font-size: 13px;
  padding: 6px 10px; border-radius: 4px; outline: none; text-align: center;
}
.trim-input-group input:focus { border-color: var(--gold); }

.editor-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-dim); font-family: var(--font-body); font-size: 12px;
  padding: 7px 16px; border-radius: var(--radius); cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.editor-btn:hover { color: var(--gold); border-color: var(--gold); background: var(--gold-glow); }
.editor-btn.primary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--gold); border-color: var(--gold-dim);
}
.editor-btn.primary:hover { background: rgba(255, 255, 255, 0.18); }
.editor-btn.saved {
  background: var(--green-dim); color: var(--green); border-color: var(--green);
  pointer-events: none;
}

.editor-info {
  display: flex; gap: 24px; margin-top: 20px;
  padding: 16px; background: var(--bg-card);
  border-radius: var(--radius); border: 1px solid rgba(255, 255, 255, 0.06);
}
.editor-info-item {
  font-size: 12px; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.editor-info-item .value {
  color: var(--gold); font-size: 14px; font-weight: 500;
  margin-top: 2px; text-transform: none; letter-spacing: 0;
}
.bpm-edit-input {
  width: 60px; background: var(--bg-deep);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--gold); font-family: var(--font-body); font-size: 14px; font-weight: 500;
  padding: 2px 6px; border-radius: 4px; outline: none; text-align: center;
}
.bpm-edit-input:focus { border-color: var(--gold); }

/* ── TRANSPORT BAR ──────────────────────────── */
.transport {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 32px;
  background: var(--bg-main);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 68px;
}

.transport-controls { display: flex; align-items: center; gap: 8px; }

.transport-btn {
  background: none; border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-dim); width: 36px; height: 36px; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 14px; transition: all var(--transition);
}
.transport-btn:hover { color: var(--gold); border-color: var(--gold); }
.transport-btn.play-btn {
  width: 42px; height: 42px; font-size: 16px;
  border-color: var(--gold-dim); color: var(--gold);
}
.transport-btn.play-btn:hover { background: var(--gold-glow); }

.transport-info { flex: 1; min-width: 0; }
.transport-song-name {
  font-size: 14px; font-weight: 500; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 4px;
}
.transport-playlist-name {
  font-size: 11px; color: var(--gold-dim);
  text-transform: uppercase; letter-spacing: 0.08em;
}

.transport-progress-wrap {
  flex: 2; display: flex; align-items: center; gap: 10px;
}
.transport-time {
  font-size: 11px; color: var(--text-dim);
  font-variant-numeric: tabular-nums; min-width: 40px;
}
.transport-progress {
  flex: 1; height: 4px; background: var(--bg-card);
  border-radius: 2px; position: relative; cursor: pointer;
}
.transport-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold-dim), var(--gold));
  border-radius: 2px; width: 0%; transition: width 0.1s linear;
}

/* ── LOADING / SPINNER ──────────────────────── */
.spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--gold-dim); border-top-color: var(--gold);
  border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── SCROLLBAR ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gold-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

.hidden { display: none; }