:root {
  --bg:          #1a1a2e;
  --bg-panel:    #16213e;
  --bg-hover:    #0f3460;
  --bg-selected: #533483;
  --text:        #e0e0e0;
  --text-dim:    #888;
  --accent:      #e94560;
  --accent-soft: #e9456033;
  --border:      #333;
  --word-bg:     #1a3a5c;
  --word-active: #e94560;
  --word-hover:  #2a5a8c;
  --success:     #4caf50;
  --warning:     #ff9800;
  --vocals-color: #4a90d9;
  --vocals-progress: #e94560;
  --inst-color:   #50c878;
  --inst-progress: #ff9800;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg); color: var(--text);
  overflow: hidden; height: 100vh;
  display: flex; flex-direction: column;
}
header {
  display: flex; align-items: center; gap: 10px;
  height: 42px; min-height: 42px; max-height: 42px;
  padding: 0 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
}
header::-webkit-scrollbar { height: 2px; }
header h1 { font-size: 14px; font-weight: 600; white-space: nowrap; margin: 0; flex-shrink: 0; }
#song-select {
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); padding: 2px 8px;
  border-radius: 4px; font-size: 12px; min-width: 140px; max-width: 200px;
  height: 28px; flex-shrink: 0;
}
#toolbar {
  display: flex; align-items: center; gap: 6px;
  margin-left: auto; flex-shrink: 0; white-space: nowrap;
}
#toolbar button {
  background: var(--bg-hover); color: var(--text);
  border: 1px solid var(--border); padding: 0 10px;
  height: 28px; line-height: 26px;
  border-radius: 4px; cursor: pointer; font-size: 12px; white-space: nowrap;
  flex-shrink: 0;
  display: inline-flex; align-items: center; gap: 4px;
}
#toolbar button:hover { background: var(--accent); }
.sep { color: var(--text-dim); margin: 0 2px; flex-shrink: 0; }
.bg-name-label { font-size: 11px; color: var(--accent); max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: default; }
#status-msg { font-size: 11px; color: var(--text-dim); max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#waveform-section { flex-shrink: 0; border-bottom: 1px solid var(--border); background: #0d1117; }

/* ── 双音轨布局 ── */
.track-row {
  display: flex; align-items: stretch;
  border-bottom: 1px solid #1e2a3a;
  position: relative;
}
.track-row.muted { opacity: 0.45; }
.track-label {
  width: 72px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-panel); border-right: 1px solid var(--border);
}
.track-mute-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--text); font-size: 11px; padding: 4px 6px;
  border-radius: 4px; cursor: pointer; white-space: nowrap;
  transition: all 0.15s;
  line-height: 1.3;
  text-align: center;
}
.track-mute-btn.active {
  background: var(--bg-hover); border-color: var(--accent); color: #fff;
}
.track-mute-btn.muted {
  background: #333; border-color: #555; color: var(--text-dim);
  text-decoration: line-through;
}
.track-mute-btn:hover { background: var(--accent); color: #fff; }
.track-waveform { flex: 1; height: 72px; overflow: hidden; }
.track-row.hidden { display: none; }

#waveform-controls {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 16px; background: var(--bg-panel);
  border-top: 1px solid var(--border);
}
#waveform-controls button {
  background: var(--bg-hover); color: var(--text);
  border: 1px solid var(--border); padding: 3px 10px;
  border-radius: 4px; cursor: pointer; font-size: 13px;
}
#waveform-controls button:hover { background: var(--accent); }
#time-display { font-family: monospace; font-size: 13px; color: var(--text-dim); }
#zoom-slider { width: 120px; vertical-align: middle; }
#editor-container { flex: 1; display: flex; overflow: hidden; }
#lyrics-panel { width: 45%; overflow-y: auto; border-right: 1px solid var(--border); }
#lyrics-list { padding: 4px 0; }
.lyric-row {
  display: flex; align-items: center;
  padding: 6px 12px; cursor: pointer;
  border-bottom: 1px solid #222; gap: 8px;
  transition: background 0.1s;
}
.lyric-row:hover { background: var(--bg-hover); }
.lyric-row.selected { background: var(--bg-selected); }
.lyric-row.playing { background: var(--accent-soft); }
.lyric-num { font-size: 11px; color: var(--text-dim); width: 24px; text-align: right; flex-shrink: 0; }
.lyric-time-edit { display: flex; align-items: center; gap: 3px; margin-left: auto; flex-shrink: 0; }
.time-input {
  font-family: monospace; font-size: 11px;
  color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 3px;
  padding: 2px 4px; width: 80px; text-align: center;
}
.time-input:focus { border-color: var(--accent); outline: none; background: #1e1e3e; }
.time-arrow { color: var(--text-dim); font-size: 11px; }
.line-dur { font-family: monospace; font-size: 10px; color: var(--text-dim); width: 32px; text-align: right; }
.line-nudge-btn {
  background: var(--bg-hover); color: var(--text);
  border: 1px solid var(--border); border-radius: 3px;
  padding: 1px 5px; cursor: pointer; font-size: 11px; line-height: 1;
}
.line-nudge-btn:hover { background: var(--accent); }
.lyric-text { font-size: 15px; flex: 1; }
.lyric-char { transition: color 0.05s, text-shadow 0.05s; }
.lyric-char.sung { color: var(--accent); }
.lyric-char.singing { color: #ffdd57; text-shadow: 0 0 8px #ffdd57aa; }
#line-edit-controls { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
#line-edit-controls button {
  background: var(--bg-hover); color: var(--text);
  border: 1px solid var(--border); padding: 2px 8px;
  border-radius: 4px; cursor: pointer; font-size: 12px; white-space: nowrap;
}
#line-edit-controls button:hover { background: var(--accent); }
#word-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#word-panel-header {
  padding: 8px 12px; background: var(--bg-panel);
  border-bottom: 1px solid var(--border); font-size: 14px;
}
#word-timeline { flex: 1; overflow-x: auto; overflow-y: hidden; padding: 12px; position: relative; }
.word-bar-container { display: flex; align-items: stretch; height: 48px; margin-bottom: 8px; }
.word-bar {
  display: flex; align-items: center; justify-content: center;
  background: var(--word-bg); border: 1px solid var(--border);
  border-radius: 3px; font-size: 16px; cursor: pointer;
  position: relative; user-select: none; min-width: 16px;
  transition: background 0.1s;
}
.word-bar:hover { background: var(--word-hover); }
.word-bar.selected { background: var(--word-active); border-color: #fff; }
.word-bar.bar-singing { background: #ffdd57; color: #000; box-shadow: 0 0 10px #ffdd5788; }
.word-bar.punct { background: transparent; border: 1px dashed var(--border); font-size: 12px; color: var(--text-dim); min-width: 8px; }
.word-bar .word-dur { position: absolute; bottom: 2px; font-size: 9px; color: var(--text-dim); font-family: monospace; }
.word-bar .drag-handle {
  position: absolute; right: -4px; top: 0; bottom: 0;
  width: 8px; cursor: col-resize; z-index: 2;
}
.word-bar .drag-handle:hover { background: var(--accent); opacity: 0.6; border-radius: 2px; }
.word-bar .drag-handle:active { background: #ff0; opacity: 0.8; }
#word-controls {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; background: var(--bg-panel);
  border-top: 1px solid var(--border);
}
#word-controls button {
  background: var(--bg-hover); color: var(--text);
  border: 1px solid var(--border); padding: 3px 10px;
  border-radius: 4px; cursor: pointer; font-size: 13px;
}
#word-controls button:hover { background: var(--accent); }
/* ── Storyboard Panel ── */
#storyboard-panel {
  padding: 12px; border-top: 1px solid var(--border);
  background: var(--bg); display: flex; flex-direction: column; gap: 10px;
  max-height: 300px;
}
#storyboard-header { font-size: 13px; font-weight: bold; color: var(--text-dim); }
#storyboard-body { display: flex; gap: 16px; align-items: flex-start; }
#asset-preview {
  width: 120px; height: 90px; background: #000; border: 1px solid var(--border);
  border-radius: 4px; display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: var(--text-dim); flex-shrink: 0; overflow: hidden;
}
#asset-preview img { max-width: 100%; max-height: 100%; object-fit: contain; }
#asset-form { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.asset-row { display: flex; align-items: center; gap: 12px; }
.asset-row label { font-size: 12px; }
#current-asset-name { font-size: 12px; color: var(--accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 200px; }
#btn-browse-assets, #btn-asset-sync, #btn-asset-add {
  background: var(--bg-hover); color: var(--text); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 4px; cursor: pointer; font-size: 12px;
}
#btn-browse-assets:hover, #btn-asset-sync:hover, #btn-asset-add:hover { background: var(--accent); }

#storyboard-list-container { flex: 1; overflow-y: auto; border: 1px solid var(--border); border-radius: 4px; background: var(--bg-panel); }
#storyboard-table { width: 100%; border-collapse: collapse; font-size: 12px; }
#storyboard-table th { background: #0d1117; padding: 6px; text-align: left; border-bottom: 1px solid var(--border); position: sticky; top: 0; }
#storyboard-table td { padding: 6px; border-bottom: 1px solid #222; }
.btn-delete-asset { color: var(--accent); cursor: pointer; border: none; background: transparent; }

/* ── Modal ── */
.modal {
  display: none; position: fixed; z-index: 100; left: 0; top: 0; width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.8);
}
.modal-content {
  background-color: var(--bg-panel); margin: 5% auto; padding: 20px;
  border: 1px solid var(--border); width: 80%; max-width: 800px; border-radius: 8px;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.close-btn { font-size: 24px; cursor: pointer; background: none; border: none; color: var(--text); }
#asset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 16px; max-height: 400px; overflow-y: auto; }
.asset-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
  padding: 8px; cursor: pointer; text-align: center; transition: all 0.2s;
}
.asset-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.asset-card img { width: 100%; height: 80px; object-fit: cover; border-radius: 2px; margin-bottom: 4px; }
.asset-card span { font-size: 11px; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── 音乐乐段 (Sections) 样式 ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px;
  margin: 10px 8px 4px 8px;
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.18), rgba(99, 102, 241, 0.05));
  border-left: 3px solid #3b82f6;
  border-radius: 4px;
  user-select: none;
  cursor: pointer;
  transition: background 0.15s ease;
}
.section-header:hover {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.28), rgba(99, 102, 241, 0.1));
}
.section-intro {
  border-left-color: #10b981;
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.18), rgba(5, 150, 105, 0.05));
}
.section-intro:hover {
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.28), rgba(5, 150, 105, 0.1));
}
.section-outro {
  border-left-color: #f59e0b;
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.18), rgba(217, 119, 6, 0.05));
}
.sec-left {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}
.sec-badge {
  font-size: 11px;
  font-weight: 700;
  color: #93c5fd;
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.section-intro .sec-badge {
  color: #6ee7b7;
}
.section-outro .sec-badge {
  color: #fcd34d;
}
.sec-style {
  font-size: 11px;
  color: #9ca3af;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 280px;
}
.sec-time {
  font-family: monospace;
  font-size: 11px;
  color: #8892b0;
  white-space: nowrap;
}


::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #444; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #666; }