/* Shared header for the landing page, legal pages, and guides. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--material-bar);
  backdrop-filter: var(--blur-bar);
  -webkit-backdrop-filter: var(--blur-bar);
  border-bottom: var(--border-hairline);
}
.site-header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-header a { text-decoration: none; }
.site-brand {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  color: var(--label-primary);
  font: var(--font-headline);
  letter-spacing: -.43px;
  white-space: nowrap;
}
.site-brand img { flex-shrink: 0; border-radius: 6.5px; }
.site-navigation { display: flex; align-items: center; gap: 8px; }
.site-navigation a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--link);
  font: var(--font-subheadline);
  white-space: nowrap;
}
.site-navigation a[aria-current] { color: var(--label-primary); font-weight: 600; }
.site-navigation .site-nav-app {
  min-height: 34px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  background: rgba(0, 122, 255, .15);
  color: var(--color-tint);
}
.site-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--link);
  font: var(--font-subheadline);
  cursor: pointer;
}
.site-header a:focus-visible,
.site-menu-toggle:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
.site-menu-toggle[aria-expanded="true"] { background: var(--fill-tertiary); }
@media (max-width: 900px) {
  .site-header-inner { flex-wrap: wrap; gap: 0 16px; min-height: 56px; padding-top: 6px; padding-bottom: 6px; }
  .navigation-ready .site-menu-toggle { display: inline-flex; }
  .site-navigation {
    flex-basis: 100%;
    align-items: stretch;
    flex-direction: column;
    gap: 4px;
    margin-top: 6px;
    padding: 8px 0 6px;
    border-top: var(--border-hairline);
    max-height: calc(100dvh - 80px);
    overflow-y: auto;
  }
  .navigation-ready .site-menu-toggle[aria-expanded="false"] + .site-navigation { display: none; }
  .site-navigation a { justify-content: flex-start; min-height: 44px; padding: 12px; border-radius: 8px; white-space: normal; }
  .site-navigation a[aria-current="page"] { background: var(--fill-tertiary); font-weight: 600; }
  .site-navigation .site-nav-app { justify-content: center; min-height: 44px; margin-top: 4px; }
}