/* Shared navigation follows the local Antigravity homepage reference. */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--site-header-height);
  border-bottom: 1px solid rgba(229, 231, 235, .65);
  background: rgba(255, 255, 255, .95);
  color: #1f1f1f;
  font: 400 16px/1.6 var(--font-interface);
}
.site-header :focus-visible { outline: 2px solid #2457c5; outline-offset: 5px; }
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 48px;
  width: calc(100% - 64px);
  min-height: var(--site-header-height);
  margin-inline: auto;
}
.brand { display: inline-flex; align-items: center; flex-shrink: 0; gap: 9px; }
.brand__logo-img { display: block; flex-shrink: 0; width: 30px; height: 30px; object-fit: contain; }
.brand__text { display: flex; align-items: baseline; gap: 12px; }
.brand__wordmark { display: block; font-size: 22px; font-weight: 500; letter-spacing: -.035em; }
.brand__sub { display: none; }
.site-nav { display: flex; flex: 1; align-items: center; gap: 24px; }
.site-nav__list { display: flex; align-items: center; gap: 24px; margin: 0; padding: 0; list-style: none; }
.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 0;
  color: #55585d;
  font-size: 14px;
  font-weight: 400;
  white-space: nowrap;
  transition: color 180ms ease-out;
}
.site-nav__link:hover, .site-nav__link.is-active { color: #1f1f1f; }
.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  margin-left: auto;
  padding: 10px 18px;
  border-radius: 999px;
  background: #1f1f1f;
  color: #fff;
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  transition: background-color 180ms ease-out;
}
.language-switch:hover { background: #36383b; }
.language-switch__option { opacity: .6; transition: opacity 160ms ease-out; }
.language-switch__option.is-active { opacity: 1; font-weight: 500; }
.language-switch__divider { opacity: .34; }
.menu-toggle { display: none; padding: 10px 0; border: 0; background: transparent; color: inherit; font-family: inherit; font-size: 14px; font-weight: 400; line-height: 1; cursor: pointer; }
.menu-toggle__icon { display: grid; gap: 5px; width: 19px; }
.menu-toggle__icon i { display: block; height: 1px; background: currentColor; }

@media (min-width: 981px) and (max-width: 1140px) {
  .site-header__inner { gap: 28px; }
  .site-nav__list { gap: 16px; }
  .site-nav__link { font-size: 13px; }
}
@media (max-width: 980px) {
  .site-header__inner { justify-content: space-between; gap: 20px; width: calc(100% - 40px); }
  .menu-toggle { display: inline-flex; align-items: center; gap: 12px; min-width: 44px; min-height: 44px; }
  .has-nav-open { overflow: hidden; }
  .site-nav {
    position: absolute;
    top: var(--site-header-height);
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100svh - var(--site-header-height));
    padding: 20px 24px 24px;
    overflow: auto;
    overscroll-behavior: contain;
    border-bottom: 1px solid #e5e7eb;
    background: #fff;
    box-shadow: 0 12px 22px rgba(31, 31, 31, .06);
  }
  .site-nav.is-open { display: block; }
  .site-nav__list { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 24px; }
  .site-nav__link { display: flex; font-size: 15px; }
  .language-switch { margin: 16px 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  .site-nav__link, .language-switch, .language-switch__option { transition: none; }
}