.sandbox-harmony-card {
  background: var(--sandbox-card-bg, var(--sandbox-surface, #ffffff));
  border-color: var(--sandbox-card-border, var(--sandbox-border, rgba(15, 23, 42, 0.12)));
  color: var(--sandbox-text, #0f172a);
}

.sandbox-harmony-surface {
  background: var(--sandbox-card-bg, var(--sandbox-surface, #ffffff));
  border-color: var(--sandbox-card-border, var(--sandbox-border, rgba(15, 23, 42, 0.12))) !important;
}

.sandbox-harmony-board {
  --sh-canvas-height: 220px;
  --sh-ruler-height: 30px;
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 0;
  align-items: stretch;
}

.sandbox-harmony-gutter {
  height: var(--sh-canvas-height);
  border: 1px solid var(--sandbox-border, rgba(15, 23, 42, 0.12));
  border-right: 0;
  border-radius: 0.5rem 0 0 0.5rem;
  overflow: hidden;
  background: var(--sandbox-surface, #ffffff);
  display: grid;
  grid-template-rows: var(--sh-ruler-height) 1fr;
}

.sandbox-harmony-gutter__lanes {
  min-height: 0;
  display: grid;
  grid-template-rows: repeat(var(--sh-lane-count, 1), minmax(0, 1fr));
}

.sandbox-harmony-gutter__cell {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  padding: 0 0.6rem;
  text-align: left;
}

.sandbox-harmony-gutter__cell:not(:last-child) {
  box-shadow: inset 0 -1px 0 var(--sandbox-border, rgba(15, 23, 42, 0.12));
}

.sandbox-harmony-gutter__cell--ruler {
  background: var(--sandbox-ruler-bg, rgba(148, 163, 184, 0.12));
}

.sandbox-harmony-gutter__lanes .sandbox-harmony-gutter__cell {
  background: var(--sandbox-lane-3-bg, rgba(22, 163, 74, 0.06));
}

.sandbox-harmony-gutter__label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--sandbox-text, #0f172a);
  line-height: 1;
  display: inline-flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sandbox-harmony-gutter__sub {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.68rem;
  color: var(--sandbox-muted, #64748b);
  letter-spacing: 0.01em;
}

.sandbox-harmony-pill {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--sandbox-muted, #64748b);
  letter-spacing: 0.04em;
}

.sandbox-harmony-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  flex: 0 0 0.65rem;
}

.sandbox-harmony-dot--lead {
  background: var(--sandbox-tempo-color, #2563eb);
}

.sandbox-harmony-canvas-wrap {
  height: var(--sh-canvas-height);
  min-width: 0;
  border: 1px solid var(--sandbox-border, rgba(15, 23, 42, 0.12));
  border-radius: 0 0.5rem 0.5rem 0;
  overflow: hidden;
}

.sandbox-harmony-canvas {
  display: block;
  width: 100%;
  height: var(--sh-canvas-height);
}