.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-charcoal-950);
  border-bottom: 1px solid var(--color-charcoal-800);
  height: 64px;
}

.site-header__inner {
  max-width: var(--container-primary);
  margin-inline: auto;
  padding-inline: var(--space-5);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ivory-100);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ivory-100);
  margin-block: 3px;
  transition: background-color var(--transition-color), transform var(--transition-transform), opacity var(--transition-opacity);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(8px) 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(-8px) rotate(-45deg);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-brass-500);
  outline-offset: 2px;
}

.site-header__nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  flex-shrink: 0;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-nav);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: var(--leading-nav);
  color: var(--color-ivory-300);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-color), background-color var(--transition-color);
}

.site-header__nav-link:hover {
  color: var(--color-brass-300);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-brass-500);
  background-color: var(--color-deep-green-900);
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--color-brass-500);
  outline-offset: 2px;
}

@media (max-width: 991px) {
  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-charcoal-950);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-5);
    overflow-y: auto;
    z-index: 999;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .site-header__nav-item {
    border-bottom: 1px solid var(--color-charcoal-800);
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    padding: var(--space-4) var(--space-2);
    font-size: var(--text-h3);
    font-family: var(--font-heading);
    font-weight: 500;
    text-transform: none;
    letter-spacing: normal;
    color: var(--color-ivory-100);
  }

  .site-header__nav-link:hover {
    color: var(--color-brass-300);
    background-color: var(--color-charcoal-900);
  }

  .site-header__nav-link[aria-current="page"] {
    color: var(--color-brass-500);
    background-color: var(--color-deep-green-900);
  }
}

@media (max-width: 575px) {
  .site-header__brand-text {
    display: none;
  }

  .site-header__logo {
    width: 36px;
    height: 36px;
  }
}