:root[data-ui-family="lab"] {
  color-scheme: dark;
  --lab-bg: #0e1011;
  --lab-surface: #191c1f;
  --lab-surface-2: #22272b;
  --lab-surface-3: #111416;
  --lab-line: #363d42;
  --lab-text: #f3f5f7;
  --lab-muted: #aeb6c2;
}

[data-ui-family="lab"] *,
[data-ui-family="lab"] *::before,
[data-ui-family="lab"] *::after {
  box-sizing: border-box;
}

[data-ui-family="lab"] body {
  margin: 0;
  background: var(--lab-bg);
  color: var(--lab-text);
  font-family: var(--ui-font-sans, system-ui, sans-serif);
  line-height: 1.55;
}

[data-ui-family="lab"] :where(button, select, input) {
  font: inherit;
}

[data-ui-family="lab"] :where(h1, h2, h3, p) {
  margin: 0;
}

[data-ui-family="lab"] .topbar-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

[data-ui-family="lab"] .back-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--lab-line);
  border-radius: var(--ui-radius-sm, 8px);
  color: var(--ui-accent);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color var(--ui-motion-fast) ease, background var(--ui-motion-fast) ease;
}

[data-ui-family="lab"] .back-link:hover {
  border-color: var(--ui-accent);
  background: color-mix(in srgb, var(--ui-accent) 8%, transparent);
}