/* design-site.css — gallery + theme-switcher chrome specific to
   design.aobalabs.com. The shared primitives + tokens come from
   pkg/design/css/design.css; this file styles the page rhythm
   that wraps the demos. */

/* ---- Site chrome ---- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.site-main {
  max-width: 64rem;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-3xl);
}

/* ---- Theme switcher ---- */

.theme-switcher {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin: 0;
}

.theme-switcher-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}

.theme-switcher-select {
  font: inherit;
  font-size: 0.875rem;
  padding: 0.3rem 0.55rem;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  appearance: auto;
}

.theme-switcher-select:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* ---- Page rhythm (ported from brain's design.css gallery) ---- */

.design {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.design-intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--space-2xl);
}

.design-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.design-lede {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--text-primary);
  max-width: 38rem;
}

.design-discipline {
  margin: 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--accent-soft);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.design-discipline strong {
  color: var(--accent);
  font-weight: 600;
}

.design-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.design-section-heading {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.design-subsection {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.design-subsection-heading {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
}

.design-note {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 38rem;
}

.design-token-group {
  margin: var(--space-md) 0 0;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}

.design-footer {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

/* ---- Color swatches ---- */

.design-swatch-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-md);
}

.design-swatch {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.design-swatch-chip {
  display: inline-block;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  /* Default checkerboard so transparent / alpha tokens read as
     fills against the card surface, not against page bg. */
  background-image:
    linear-gradient(45deg, rgba(0,0,0,0.04) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.04) 75%),
    linear-gradient(45deg, rgba(0,0,0,0.04) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.04) 75%);
  background-position: 0 0, 5px 5px;
  background-size: 10px 10px;
}

.design-swatch-chip--border {
  background: transparent;
  background-image: none;
  border: 1px solid var(--border-subtle);
}

.design-swatch-chip[data-token="bg-primary"]    { background-color: var(--bg-primary);    background-image: none; }
.design-swatch-chip[data-token="bg-elevated"]   { background-color: var(--bg-elevated);   background-image: none; }
.design-swatch-chip[data-token="bg-tag"]        { background-color: var(--bg-tag); }
.design-swatch-chip[data-token="text-primary"]  { background-color: var(--text-primary);  background-image: none; }
.design-swatch-chip[data-token="text-muted"]    { background-color: var(--text-muted);    background-image: none; }
.design-swatch-chip[data-token="text-faint"]    { background-color: var(--text-faint);    background-image: none; }
.design-swatch-chip[data-token="border-subtle"] { border-color: var(--border-subtle); }
.design-swatch-chip[data-token="border-focus"]  { border-color: var(--border-focus); }
.design-swatch-chip[data-token="accent"]        { background-color: var(--accent);  background-image: none; }
.design-swatch-chip[data-token="success"]       { background-color: var(--success); background-image: none; }
.design-swatch-chip[data-token="warning"]       { background-color: var(--warning); background-image: none; }
.design-swatch-chip[data-token="danger"]        { background-color: var(--danger);  background-image: none; }

.design-swatch-name {
  flex: 0 0 auto;
  font-size: 0.8125rem;
}

.design-swatch-desc {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.8125rem;
  text-align: right;
}

/* ---- Demo cards ---- */

.design-demos {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.design-demo {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.design-demo-name {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.design-demo-desc {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.design-demo-stage {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-primary);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
  min-height: 2.5rem;
}

/* Some demos contain a whole form, page-section, or nav — let them
   stretch full width. */
.design-demo-stage > form,
.design-demo-stage > .field,
.design-demo-stage > .page-section,
.design-demo-stage > .breadcrumb,
.design-demo-stage > .card,
.design-demo-stage > nav,
.design-demo-stage > ul {
  flex: 1 1 100%;
}

.design-demo-source {
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tag);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  line-height: 1.5;
  overflow-x: auto;
  color: var(--text-muted);
}

.design-demo-source code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  color: inherit;
  white-space: pre;
}