.uml-grid {
  display: flex;
  gap: 0.5rem;
}
.uml-grid > .card:first-child {
  flex: 0 0 calc(76vw - 0.25rem - var(--side-w));
}
.uml-grid > .card:last-child {
  flex: 0 0 calc(24vw - 0.25rem);
  padding: 0.5rem;
}
.uml-grid > .card {
  margin: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.notes-area {
  font-size: 0.75rem;
  padding: 0.25rem 0.4rem;
}
.notes-area,
.dsl-area {
  min-height: calc(100vh - 200px);
  width: 100%;
  flex: 1;
  resize: vertical;
  font-family: monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  padding: 1rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  background: var(--clr-surface);
  color: var(--clr-text);
}
.mermaid svg {
  border-radius: var(--radius);
}
.tab-bar {
  display: flex;
  gap: 0;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--clr-border);
}
.tab-bar button {
  padding: 0.4rem 1.2rem;
  border: none;
  background: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition:
    color 0.15s,
    border-color 0.15s;
}
.tab-bar button.active {
  color: var(--clr-accent);
  border-bottom-color: var(--clr-accent);
  font-weight: 600;
}
.tab-panel {
  display: none;
  flex: 1;
  flex-direction: column;
}
.tab-panel.active {
  display: flex;
  flex: 1;
}
@media (max-width: 960px) {
  .uml-grid {
    flex-direction: column;
  }
  .uml-grid > .card {
    flex: 1 1 auto;
  }
}