:root {
  --bg: #0f1221;
  --panel: #171a2b;
  --text: #e6e7ef;
  --muted: #9aa0b8;
  --accent: #69d2ff;
  --accent-2: #8aff80;
  --danger: #ff6b6b;
  --warning: #ffd166;
  --grid: #2a2f45;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: linear-gradient(180deg, #0d1020, #0b0e1a);
  color: var(--text);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--grid);
}
.app-header h1 { margin: 0; font-size: 18px; }

.header-actions { display: flex; gap: 10px; align-items: center; }

.file-picker input[type="file"] { display: none; }
.file-picker span {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

button {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: not-allowed; }

.app-main { padding: 16px; display: grid; gap: 20px; }

.player-section { display: grid; gap: 12px; }
.audio-controls { display: grid; gap: 8px; }

.time-info { display: grid; gap: 4px; grid-template-columns: 1fr; }
.time-info strong { font-weight: 600; }
.muted { color: var(--muted); font-size: 12px; margin-left: 6px; }

.waveform-container {
  background: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 10px;
  padding: 10px;
}

#waveformCanvas { width: 100%; height: 160px; display: block; border-radius: 6px; background: #0b0f1e; }
.waveform-help { color: var(--muted); font-size: 12px; margin-top: 8px; }

.timeline-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}
.timeline-controls label { display: flex; gap: 8px; align-items: center; }
.timeline-controls input[type="range"] { width: 280px; }

.annotations-section { display: grid; gap: 10px; }

.annotation-entry { display: flex; gap: 8px; }
.annotation-entry input {
  flex: 1;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--grid);
  background: #0c1122;
  color: var(--text);
}

.annotations-list { display: grid; gap: 8px; }

.annotation-item {
  display: grid;
  grid-template-columns: 120px 200px 1fr auto;
  gap: 10px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 8px;
  padding: 8px 10px;
}
.annotation-times { display: grid; gap: 2px; }
.annotation-times .rel { color: var(--accent-2); font-weight: 600; }
.annotation-times .abs { color: var(--muted); font-size: 12px; }

.annotation-text { color: var(--text); }

.annotation-actions { display: flex; gap: 6px; }
.annotation-actions button { padding: 6px 10px; }
.annotation-actions .danger { background: var(--danger); color: #000; }
.annotation-actions .secondary { background: #2ec9b5; color: #000; }

.app-footer {
  padding: 10px 16px;
  color: var(--muted);
  border-top: 1px solid var(--grid);
}

@media (max-width: 720px) {
  .annotation-item { grid-template-columns: 120px 1fr; grid-auto-rows: auto; }
  .annotation-actions { grid-column: 1 / -1; }
}