src/components/Timeline.css

/* ── Timeline shell ─────────────────────────────────────────── */
.timeline {
  height: 180px;
  background: #080818;
  border-top: 1px solid #2a2a4a;
  display: flex;
  flex-direction: column;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  flex-shrink: 0;
  user-select: none;
}

/* ── Controls bar ────────────────────────────────────────────── */
.tl-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: #0d0d22;
  border-bottom: 1px solid #1e1e3a;
  flex-shrink: 0;
}

.tl-btn {
  padding: 4px 9px;
  background: #13132a;
  border: 1px solid #2a2a5a;
  border-radius: 4px;
  color: #8888bb;
  cursor: pointer;
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  transition: all 0.15s;
}
.tl-btn:hover { border-color: #6666ff; color: #aaaaff; background: #1a1a3a; }

.tl-play { font-size: 13px; min-width: 32px; text-align: center; }
.tl-play.playing { border-color: #44cc44; color: #88ff88; background: #0e1e0e; }

.tl-time {
  font-size: 10px;
  color: #aaaacc;
  font-weight: 700;
  letter-spacing: 1px;
  min-width: 100px;
  padding: 0 6px;
}

.tl-kf-btn {
  background: #1a1a0a;
  border-color: #5a5a22;
  color: #cccc44;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 10px;
}
.tl-kf-btn:not(.disabled):hover { border-color: #aaaa44; color: #ffff66; background: #2a2a0e; }
.tl-kf-btn.disabled { opacity: 0.3; cursor: not-allowed; }

.tl-duration {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  color: #555577;
  font-size: 9px;
}
.tl-duration input {
  width: 44px;
  background: #13132a;
  border: 1px solid #2a2a4a;
  border-radius: 3px;
  color: #aaaacc;
  padding: 3px 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  text-align: center;
  outline: none;
}

/* ── Body (labels + tracks) ─────────────────────────────────── */
.tl-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* Labels column */
.tl-labels {
  width: 140px;
  flex-shrink: 0;
  border-right: 1px solid #1e1e3a;
  overflow-y: auto;
  padding-top: 24px; /* align with ruler */
}
.tl-empty { color: #333355; padding: 10px; font-size: 9px; text-align: center; }
.tl-label {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 10px;
  height: 32px;
  border-bottom: 1px solid #111128;
  color: #666688;
  font-size: 9px;
}
.tl-label.active { background: #111130; color: #aaaaff; }
.tl-label-dot  { color: #4444aa; font-size: 11px; flex-shrink: 0; }
.tl-label-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tl-kf-count   {
  background: #2a2a0a;
  color: #aaaa44;
  font-size: 8px;
  padding: 1px 4px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* Tracks wrapper */
.tl-tracks-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ── Ruler ───────────────────────────────────────────────────── */
.tl-ruler {
  height: 24px;
  background: #0d0d22;
  border-bottom: 1px solid #1e1e3a;
  position: relative;
  cursor: crosshair;
  flex-shrink: 0;
  overflow: hidden;
}
.tl-tick {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}
.tl-tick::before {
  content: '';
  display: block;
  width: 1px;
  height: 8px;
  background: #3a3a5a;
}
.tl-tick span { font-size: 8px; color: #444466; margin-top: 1px; }

/* Playhead needle (ruler) */
.tl-playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #ffcc00;
  transform: translateX(-1px);
  pointer-events: none;
  box-shadow: 0 0 6px #ffcc0099;
  z-index: 5;
}

/* ── Track rows ─────────────────────────────────────────────── */
.tl-tracks { flex: 1; overflow-y: auto; }

.tl-track {
  position: relative;
  height: 32px;
  border-bottom: 1px solid #111128;
  background: #0a0a1e;
  transition: background 0.1s;
}
.tl-track.active { background: #0d0d28; }

/* Playhead ghost line on each track */
.tl-track-playhead {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: #ffcc0055;
  transform: translateX(-0.5px);
  pointer-events: none;
  z-index: 2;
}

/* Connection line between keyframes */
.tl-kf-line {
  position: absolute;
  top: 50%;
  height: 2px;
  background: linear-gradient(90deg, #ffcc0077, #ffcc0033);
  transform: translateY(-50%);
  pointer-events: none;
  z-index: 1;
}

/* Keyframe diamond marker */
.tl-kf-diamond {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #ffcc00;
  font-size: 12px;
  cursor: pointer;
  z-index: 3;
  text-shadow: 0 0 6px #ffcc0099;
  transition: all 0.1s;
  line-height: 1;
}
.tl-kf-diamond:hover {
  color: #ff4444;
  text-shadow: 0 0 8px #ff444499;
  transform: translate(-50%, -50%) scale(1.4);
}