.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
}

.site-header__brand {
  text-decoration: none;
}

.site-header__brand span:first-child {
  font-size: var(--font-size-md);
}

.site-header__brand span:last-child {
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

.site-header__nav {
  display: flex;
}

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

.site-header__nav-item--highlight .nav-link {
  color: var(--color-primary-strong);
}

.site-header__nav-item--highlight .nav-link::after {
  width: 100%;
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(5, 6, 9, 0.8);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  color: inherit;
}

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

.site-header__toggle-bar {
  width: 1.1rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header .navbar-inner {
    align-items: center;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at 0 0, rgba(196, 154, 58, 0.12), transparent 60%),
                radial-gradient(circle at 100% 0, rgba(15, 39, 90, 0.4), transparent 60%),
                var(--color-bg-elevated);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base),
                transform var(--transition-base),
                visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--layout-gutter) var(--space-5);
    gap: var(--space-3);
  }

  .site-header__nav-item--highlight {
    margin-top: var(--space-2);
  }

  .site-header__nav--open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav {
    transition: none;
  }
  .site-header__toggle-bar {
    transition: none;
  }
}