/* ── Track strip ─────────────────────────────────────────────── */
#track-strip {
  flex: 0 0 auto;
  height: var(--track-strip-height);
  background: var(--bg-0);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  overflow-x: auto;
  overflow-y: hidden;
}

.track-strip-label {
  font-size: 9px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
  padding-right: 2px;
}

#track-cards {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

/* ── Track card ──────────────────────────────────────────────── */
.track-card {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 30px;
  padding: 0 7px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-2);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.1s, border-color 0.15s;
  position: relative;
}

.track-card:hover {
  background: var(--bg-3);
  border-color: var(--border-light);
}

.track-card.active {
  background: var(--bg-3);
  border-color: var(--track-color, var(--accent));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--track-color, var(--accent)) 30%, transparent);
}

.track-card.muted {
  opacity: 0.5;
}

/* Left color bar — uses CSS custom property set per-card */
.track-color-bar {
  width: 3px;
  height: 100%;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: var(--track-color, var(--accent));
  flex-shrink: 0;
}

.track-name {
  font-size: 11px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 72px;
  min-width: 40px;
  cursor: pointer;
  user-select: none;
}

.track-card.active .track-name {
  color: var(--track-color, var(--accent-bright));
  font-weight: 600;
}

.track-rename-input {
  width: 68px;
  font-size: 10px;
  padding: 1px 4px;
  background: var(--bg-0);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

/* ── Channel control ─────────────────────────────────────────── */
.track-ch-wrap {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.track-ch-label {
  font-size: 9px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.track-ch-input {
  width: 28px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 2px;
}

/* ── Output selector ─────────────────────────────────────────── */
.track-out-select {
  font-size: 10px;
  max-width: 96px;
  min-width: 60px;
  padding: 2px 4px;
}

/* ── Synth preset selector ───────────────────────────────────── */
.track-preset-select {
  font-size: 10px;
  max-width: 90px;
  min-width: 60px;
  padding: 2px 4px;
  color: var(--accent-bright);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

/* ── Mute button ─────────────────────────────────────────────── */
.track-mute-btn {
  font-size: 9px;
  font-weight: 700;
  padding: 2px 5px;
  min-width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.track-mute-btn.muted {
  background: var(--amber-dim);
  border-color: var(--amber);
  color: var(--amber);
}

/* ── Add track button ────────────────────────────────────────── */
#add-track-btn {
  flex-shrink: 0;
  font-size: 11px;
  padding: 4px 10px;
  color: var(--accent-bright);
  border-color: var(--accent-dim);
}
#add-track-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}