/* Sticky primary navigation */
.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 0.0625rem solid transparent;
  transition:
    background-color var(--transition),
    border-color var(--transition),
    backdrop-filter var(--transition);
}

.site-header.is-scrolled {
  border-color: var(--color-border);
  background: rgba(8, 8, 8, 0.82);
  backdrop-filter: blur(1rem);
}

.nav {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  display: inline-flex;
  gap: var(--space-2);
  align-items: center;
  flex-shrink: 0;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav__brand img {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  object-fit: cover;
}

.nav__menu {
  display: contents;
}

.nav__links {
  position: absolute;
  left: 50%;
  display: flex;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  align-items: center;
  transform: translateX(-50%);
}

.nav__links a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a[aria-current="true"] {
  color: var(--color-text);
}

.nav__toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.7rem;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 0.125rem;
  background: var(--color-text);
  transition:
    transform var(--transition),
    translate var(--transition);
}

.nav__toggle span + span {
  margin-top: 0.45rem;
}

.nav__toggle[aria-expanded="true"] span:first-child {
  translate: 0 0.2875rem;
  transform: rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:last-child {
  translate: 0 -0.2875rem;
  transform: rotate(-45deg);
}