.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--page-max, 74rem);
  margin: 0 auto;
  padding: 0.85rem var(--page-pad, 1rem);
}

.site-header__beta {
  max-width: var(--page-max, 74rem);
  margin: -0.35rem auto 0;
  padding: 0 1rem 0.65rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 650;
  text-align: center;
}

.site-header__brand {
  font-size: 1.2rem;
  font-weight: 850;
  letter-spacing: -0.05em;
  color: var(--color-text);
  text-decoration: none;
}

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-accent);
  outline: none;
}

.site-header__nav { flex-shrink: 0; }

.site-header__links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__link {
  display: inline-block;
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 650;
}

.site-header__link:hover,
.site-header__link:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-raised);
  outline: none;
}

.site-header__logout {
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 0.6rem;
  color: var(--color-text);
  background: transparent;
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}

.site-header__logout:hover,
.site-header__logout:focus-visible {
  border-color: var(--color-border-strong);
  background: var(--color-surface-raised);
  outline: none;
}

html.route-guard-pending body {
  visibility: hidden;
}

.site-header__theme {
  display: inline-grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
}

.site-header__theme:hover { border-color: var(--color-accent); color: var(--color-accent); }

@media (max-width: 43rem) {
  .site-header__inner { align-items: flex-start; }
  .site-header__nav { min-width: 0; }
  .site-header__links { justify-content: flex-end; flex-wrap: wrap; }
  .site-header__link { padding: 0.42rem 0.5rem; font-size: 0.8rem; }
  .site-header__logout { padding: 0.4rem 0.55rem; font-size: 0.8rem; }
}