.site-header {
  background-color: var(--color-navy-900);
  color: var(--color-parchment-100);
  position: relative;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-parchment-100);
  flex-shrink: 0;
}

.site-header__logo {
  width: 3.5rem;
  height: 3.5rem;
  object-fit: contain;
  display: block;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--text-h4);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-parchment-100);
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-teal-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-parchment-100);
  transition: background-color var(--transition-color), border-color var(--transition-color);
}

.site-header__toggle:hover {
  background-color: rgba(168, 200, 193, 0.15);
}

.site-header__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 1.25rem;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-transform), opacity var(--transition-color);
}

.site-header__toggle-icon {
  position: relative;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.site-header__toggle-icon::before {
  top: -0.375rem;
}

.site-header__toggle-icon::after {
  top: 0.375rem;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  transform: translateY(0.375rem) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  transform: translateY(-0.375rem) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
}

.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: 2.75rem;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-parchment-100);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  transition: color var(--transition-color), background-color var(--transition-color);
}

.site-header__nav-link:hover {
  color: var(--color-brass-400);
  background-color: rgba(168, 200, 193, 0.1);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

@media (max-width: 64rem) {
  .site-header__brand-text {
    font-size: var(--text-h4);
  }

  .site-header__nav-list {
    gap: var(--space-3);
  }

  .site-header__nav-link {
    padding-inline: var(--space-2);
  }
}

@media (max-width: 48rem) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-navy-900);
    border-top: 1px solid var(--color-teal-300);
    box-shadow: var(--shadow-elevated);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-transform);
    z-index: 99;
  }

  .site-header__nav.is-open {
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3);
  }

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    min-height: 3rem;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-body);
    border-radius: var(--radius-sm);
  }

  .site-header__nav-link:hover {
    background-color: rgba(168, 200, 193, 0.15);
  }
}