/* Public pages chrome: site header and site footer. */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgb(242 250 243 / .86);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  box-shadow: 0 1px 0 rgb(10 25 11 / .05);
}

.site-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

.site-nav {
  display: flex;
  gap: var(--space-6);
}
.site-nav a {
  font-weight: var(--weight-medium);
  color: var(--color-ink-2);
  text-decoration: none;
}
.site-nav a:hover { color: var(--color-ink); }

.site-actions { display: flex; align-items: center; gap: var(--space-2); }

@media (max-width: 900px) {
  .site-nav { display: none; }
}

@media (max-width: 520px) {
  .site-actions .btn-ghost { display: none; }
  .site-actions .btn { --btn-h: 40px; padding: 0 var(--space-4); }
}

/* ------------------------------------------------------------------ site footer */
.site-footer {
  margin-top: var(--section-gap);
  padding: var(--section-gap) 0 var(--space-7);
  background: var(--color-surface-2);
}
.site-footer-grid {
  display: grid;
  grid-template-columns: minmax(min(100%, 240px), 1.4fr) repeat(auto-fit, minmax(150px, 1fr));
  gap: clamp(var(--space-6), 3vw, var(--space-8));
}
.site-footer h2 {
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  letter-spacing: 0;
}
.site-footer ul { list-style: none; padding: 0; display: grid; gap: var(--space-3); }
.site-footer a { color: var(--color-ink-2); text-decoration: none; }
.site-footer a:hover { color: var(--color-ink); text-decoration: underline; }
.site-footer-about p { margin-top: var(--space-4); max-width: 34ch; color: var(--color-ink-2); }
.site-footer-base {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid rgb(10 25 11 / .1);
  font-size: var(--text-sm);
  color: var(--color-ink-2);
}

@media (max-width: 560px) {
  /* the 240px brand column plus a 150px link column no longer fit: two equal columns, brand on top */
  .site-footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer-about { grid-column: 1 / -1; }
}