.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-block-end: var(--border-subtle);
  background: rgba(10, 10, 12, 0.94);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.site-header__shell {
  display: flex;
  position: relative;
  min-height: 4.75rem;
  align-items: center;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.6875rem;
  color: var(--color-ivory-50);
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--color-ivory-50);
}

.site-header__mark {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.05rem;
}

.site-header__brand-name {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 0.92;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__brand-tagline {
  color: var(--color-platinum-300);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.site-header__toggle {
  display: inline-grid;
  width: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  margin-inline-start: auto;
  place-content: center;
  gap: 0.3rem;
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-card);
  background: var(--color-midnight-900);
  padding: 0;
}

.site-header__toggle-line {
  display: block;
  width: 1.25rem;
  height: 1px;
  background: var(--color-ivory-50);
  transform-origin: center;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] {
  border-color: rgba(212, 175, 55, 0.7);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line {
  background: var(--color-champagne-300);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.4rem) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-0.4rem) rotate(-45deg);
}

.site-header__nav {
  display: none;
  position: absolute;
  z-index: 2;
  top: calc(100% + 0.5rem);
  right: 0;
  left: 0;
  max-height: calc(100vh - 5.75rem);
  overflow-y: auto;
  border: var(--border-subtle);
  border-radius: var(--radius-panel);
  background: var(--color-midnight-900);
  box-shadow: var(--shadow-floating);
  padding: var(--space-4);
}

.site-header__nav.is-open {
  display: grid;
  gap: var(--space-4);
  animation: site-header-menu-in var(--transition-drawer) both;
}

.site-header__nav-list,
.site-header__nav-list li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list {
  display: grid;
  gap: var(--space-1);
}

.site-header__nav-list li + li {
  margin: 0;
}

.site-header__nav-list a {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  border-block-end: 1px solid transparent;
  color: var(--color-platinum-300);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-color: var(--color-champagne-500);
  color: var(--color-ivory-50);
}

.site-header__nav-list a[aria-current="page"]::after {
  content: "Current";
  margin-inline-start: auto;
  color: var(--color-champagne-300);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-header__nav-actions {
  border-block-start: var(--border-subtle);
  padding-block-start: var(--space-3);
}

.site-header__directory-link {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-champagne-300);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}

@keyframes site-header-menu-in {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 900px) {
  .site-header__shell {
    min-height: 5rem;
    gap: var(--space-5);
  }

  .site-header__mark {
    width: 2.25rem;
    height: 2.25rem;
    flex-basis: 2.25rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    position: static;
    min-width: 0;
    max-height: none;
    flex: 1 1 auto;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-4);
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }

  .site-header__nav-list {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: clamp(0.6rem, 1.25vw, 1.15rem);
  }

  .site-header__nav-list a {
    min-height: 3rem;
    align-items: center;
    white-space: nowrap;
  }

  .site-header__nav-list a[aria-current="page"]::after {
    display: none;
  }

  .site-header__nav-contact {
    display: none;
  }

  .site-header__nav-actions {
    flex: 0 0 auto;
    border: 0;
    padding: 0;
  }

  .site-header__directory-link {
    min-height: 3rem;
    border: 1px solid var(--color-line-dark);
    border-radius: var(--radius-card);
    padding-inline: 0.8rem;
    color: var(--color-champagne-300);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .site-header__directory-link:hover {
    border-color: var(--color-champagne-500);
    background: var(--color-midnight-800);
  }
}

@media (min-width: 1220px) {
  .site-header__shell {
    gap: var(--space-6);
  }

  .site-header__nav-list a {
    font-size: 0.8125rem;
  }
}

@media (max-width: 399px) {
  .site-header__brand-tagline {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav.is-open {
    animation: none;
  }
}