.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--divider);
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.site-header__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

.site-header__brand {
  font-size: var(--fs-headline);
  font-weight: 600;
  letter-spacing: var(--track-title);
  color: var(--ink-1);
}

@media (max-width: 640px) {
  .site-header__inner {
    padding: 0 var(--sp-4);
  }
}