.site-header {
  position: relative;
  z-index: 5;
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: max(var(--space-3), env(safe-area-inset-top)) var(--space-3);
  padding-inline:
    max(var(--space-4), env(safe-area-inset-left), calc((100vw - 74rem) / 2))
    max(var(--space-4), env(safe-area-inset-right), calc((100vw - 74rem) / 2));
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-weight: 760;
  text-decoration: none;
}

.brand:hover .brand-mark {
  background: var(--color-accent-strong);
}

.brand-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border-radius: 0.8rem;
  background: var(--color-accent);
  color: var(--color-bg);
}

.header-actions,
.theme-control,
.site-menu-panel {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-actions {
  min-width: 0;
  justify-content: flex-end;
}

.theme-control span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.site-menu > summary {
  list-style: none;
}

.site-menu > summary::-webkit-details-marker {
  display: none;
}

.site-menu > summary::after {
  content: "›";
  display: inline-block;
  margin-left: var(--space-2);
  transform: rotate(90deg);
}

.site-menu[open] > summary::after {
  transform: rotate(-90deg);
}

.site-menu-panel {
  position: absolute;
  z-index: 6;
  top: calc(100% + var(--space-2));
  right: max(var(--space-4), env(safe-area-inset-right));
  display: grid;
  width: min(20rem, calc(100vw - 2rem));
  max-height: min(34rem, calc(100vh - 6rem));
  padding: var(--space-3);
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.site-menu-panel .button,
.site-menu-panel form,
.site-menu-panel form .button {
  width: 100%;
}

@media (max-width: 25rem) {
  .site-header {
    padding-inline: max(var(--space-3), env(safe-area-inset-left))
      max(var(--space-3), env(safe-area-inset-right));
  }

  .brand > span:last-child {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .theme-control select {
    width: 6.75rem;
  }
}