:root {
  --sa-nav-night: #0a151e;
  --sa-nav-blue: #123d50;
  --sa-nav-cream: #f5f0e7;
  --sa-nav-yellow: #f5ca68;
  --sa-nav-line: rgba(255, 255, 255, .16);
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  margin: 0;
  padding: 0;
  background: var(--sa-nav-night);
  color: #fff;
  border-bottom: 1px solid var(--sa-nav-line);
  box-shadow: 0 8px 22px rgba(10, 21, 30, .2);
}

.site-header__inner {
  width: min(1200px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.site-brand {
  flex: 0 0 auto;
  color: #fff;
  font: 400 1.25rem/1 Georgia, serif;
  text-decoration: none;
}

.site-brand span {
  display: block;
  margin-top: 5px;
  color: #aab8b9;
  font: 700 .61rem/1.3 system-ui, sans-serif;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  font: 700 .79rem/1.2 system-ui, sans-serif;
}

.site-menu-toggle {
  display: none;
}

.site-header a,
.site-header summary {
  color: #dde8e8;
  text-decoration: none;
}

.site-nav > a,
.nav-group > summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 9px 11px;
  border: 1px solid transparent;
  border-radius: 4px;
}

.nav-group {
  position: relative;
}

.nav-group > summary {
  cursor: pointer;
  list-style: none;
}

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

.nav-group > summary::after {
  content: "⌄";
  color: var(--sa-nav-yellow);
  font-size: .95rem;
  line-height: 1;
  transition: transform .16s ease;
}

.nav-group[open] > summary {
  background: rgba(255, 255, 255, .08);
  border-color: var(--sa-nav-line);
}

.nav-group[open] > summary::after {
  transform: rotate(180deg);
}

.site-nav > a:hover,
.nav-group > summary:hover {
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.site-header a:focus-visible,
.site-header summary:focus-visible {
  outline: 3px solid var(--sa-nav-yellow);
  outline-offset: 2px;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(160px, 1fr));
  gap: 2px;
  width: min(430px, calc(100vw - 40px));
  padding: 13px;
  background: var(--sa-nav-night);
  border: 1px solid var(--sa-nav-line);
  box-shadow: 0 18px 36px rgba(10, 21, 30, .32);
}

.nav-group--ai .nav-dropdown {
  right: 0;
  left: auto;
}

.nav-dropdown__label {
  grid-column: 1 / -1;
  padding: 6px 8px 4px;
  color: var(--sa-nav-yellow);
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.nav-dropdown a {
  padding: 9px 8px;
  border-radius: 3px;
  color: #e8efef;
  font-size: .78rem;
  line-height: 1.25;
}

.nav-dropdown a:hover {
  background: var(--sa-nav-blue);
  color: #fff;
}

.nav-dropdown .nav-dropdown__label--briefings {
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--sa-nav-line);
}

@media (max-width: 840px) {
  .site-header__inner {
    width: min(100% - 30px, 1200px);
    min-height: 70px;
  }

  .site-brand {
    font-size: 1.16rem;
  }

  .site-menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 39px;
    margin-left: auto;
    padding: 9px 11px;
    border: 1px solid var(--sa-nav-line);
    border-radius: 4px;
    background: transparent;
    color: #fff;
    cursor: pointer;
    font: 800 .73rem/1 system-ui, sans-serif;
    letter-spacing: .08em;
    text-transform: uppercase;
  }

  .site-menu-toggle span {
    color: var(--sa-nav-yellow);
    font-size: 1rem;
  }

  .site-menu-toggle:focus-visible {
    outline: 3px solid var(--sa-nav-yellow);
    outline-offset: 2px;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 9px);
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
    width: min(390px, calc(100vw - 30px));
    padding: 12px;
    background: var(--sa-nav-night);
    border: 1px solid var(--sa-nav-line);
    box-shadow: 0 18px 36px rgba(10, 21, 30, .32);
  }

  .site-header.nav-enhanced .site-nav {
    display: none;
  }

  .site-header.nav-enhanced .site-nav.is-open {
    display: flex;
  }

  .site-nav > a,
  .nav-group > summary {
    justify-content: space-between;
    width: 100%;
    min-height: 42px;
    padding: 11px 10px;
  }

  .nav-group {
    position: static;
  }

  .nav-dropdown,
  .nav-group--ai .nav-dropdown {
    position: static;
    width: 100%;
    margin: 2px 0 5px;
    box-shadow: none;
  }
}

@media (max-width: 390px) {
  .site-brand span {
    display: none;
  }
}