/* Shared marketing masthead: brand, centered navigation, one compact action group. */
.site-navigation { background: var(--color-card); }
.site-navigation .site-header {
  display: grid; grid-template-columns: minmax(max-content, 1fr) auto minmax(max-content, 1fr);
  align-items: center; gap: var(--space-6); width: min(calc(100% - 80px), 1280px);
  min-height: 76px; padding-block: var(--space-3);
}
.site-navigation .brand { justify-self: start; }
.site-navigation .brand img { height: 30px; width: auto; }
.site-navigation .primary-nav { display: flex; flex-wrap: nowrap; gap: var(--space-3); width: auto; }
.site-navigation .primary-nav a {
  position: relative; display: flex; align-items: center; min-height: 44px;
  padding: 0 var(--space-2); border-radius: 0; background: transparent;
  font-size: var(--type-small-size); font-weight: var(--font-semibold);
  color: var(--color-muted-foreground); white-space: nowrap; text-decoration: none;
}
.site-navigation .primary-nav a:hover, .site-navigation .primary-nav a[aria-current="page"] { color: var(--color-foreground); background: transparent; }
.site-navigation .primary-nav a[aria-current="page"]::after {
  content: ''; position: absolute; height: 2px; bottom: 4px; inset-inline: var(--space-2); background: var(--color-primary);
}
.header-actions { display: flex; align-items: center; justify-self: end; gap: var(--space-3); }
.header-disclosure { position: relative; width: 44px; flex: 0 0 44px; }
.header-icon-button {
  display: grid; place-items: center; min-height: 44px; width: 44px; padding: 0;
  list-style: none; border-radius: var(--radius-sm); color: var(--color-foreground); cursor: pointer;
}
.header-icon-button::-webkit-details-marker { display: none; }
.header-icon-button::marker { content: ''; }
.header-icon-button > svg { width: 21px; height: 21px; }
.header-icon-button:hover, .header-disclosure[open] > summary { background: var(--color-muted); }
.header-download {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-3);
  min-height: 44px; padding: 0 var(--space-4); border-radius: var(--radius-sm);
  background: var(--color-action); color: var(--color-on-action); text-decoration: none;
  font-size: var(--type-small-size); font-weight: var(--font-semibold); white-space: nowrap;
}
.header-download:hover { background: var(--color-secondary); }
.header-download svg, .mobile-download svg { width: 18px; height: 18px; }
.header-disclosure:not([open]) > nav { display: none; }
.site-navigation .language-nav, .mobile-primary-nav {
  position: absolute; z-index: 30; top: calc(100% + var(--space-2)); right: 0;
  display: flex; flex-direction: column; align-items: stretch; gap: var(--space-1);
  width: 208px; max-width: calc(100vw - var(--space-8)); padding: var(--space-2);
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--elevation-2);
}
.site-navigation .language-nav a, .mobile-primary-nav a {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4);
  min-height: 44px; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm);
  color: var(--color-muted-foreground); font-size: var(--type-body-size); text-decoration: none;
}
.site-navigation .language-nav a:hover, .site-navigation .language-nav a[aria-current="page"],
.mobile-primary-nav a:hover, .mobile-primary-nav a[aria-current="page"] { color: var(--color-foreground); background: var(--color-muted); }
.language-check { width: 18px; height: 18px; flex-shrink: 0; visibility: hidden; }
.language-nav a[aria-current="page"] .language-check { visibility: visible; color: var(--color-primary); }
.mobile-navigation, .header-icon-button > .menu-close-icon { display: none; }
.mobile-navigation[open] .menu-open-icon { display: none; }
.mobile-navigation[open] .menu-close-icon { display: block; }
@media (max-width: 1100px) {
  .site-navigation .site-header { width: calc(100% - 64px); gap: var(--space-4); }
  .site-navigation .primary-nav { gap: var(--space-1); }
  .header-actions { gap: var(--space-2); }
}
@media (max-width: 900px) {
  .site-navigation .site-header { grid-template-columns: 1fr auto; min-height: 68px; gap: var(--space-4); padding-block: var(--space-2); }
  .site-navigation .primary-nav, .header-download { display: none; }
  .site-navigation .language-switcher { grid-column: auto; grid-row: auto; }
  .mobile-navigation { display: block; }
  .mobile-primary-nav { width: 280px; }
  .mobile-primary-nav .mobile-download { margin-top: var(--space-2); background: var(--color-action); color: var(--color-on-action); }
  .mobile-primary-nav .mobile-download:hover { background: var(--color-secondary); }
}
@media (max-width: 599px) {
  .site-navigation .site-header { width: calc(100% - 40px); min-height: 64px; }
  .site-navigation .brand img { height: 28px; }
  .header-actions { gap: var(--space-1); }
}