.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-line-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  margin-right: auto;
}

.brand-name {
  font-family: var(--font-wordmark);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-wordmark);
}

.site-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  border: 0;
  background: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition);
}

.nav-link:hover {
  background: var(--color-surface);
}

.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 3rem;
  height: 3rem;
  padding: 0 0.625rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
}

.menu-toggle-bar {
  display: block;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
  transition: transform var(--transition);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.mobile-menu {
  border-top: 1px solid var(--color-line-soft);
  background: var(--color-paper);
}

.mobile-menu nav {
  padding-top: var(--space-4);
  padding-bottom: var(--space-5);
}

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

.mobile-link {
  display: block;
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius-card);
  font-size: 1.0625rem;
  font-weight: 500;
  text-decoration: none;
}

.mobile-link:hover {
  background: var(--color-surface);
}

.site-footer {
  border-top: 1px solid var(--color-line);
  background: var(--color-paper);
  padding-block: var(--space-8) var(--space-6);
}

.footer-grid {
  display: grid;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.footer-brand {
  max-width: 20rem;
  display: grid;
  gap: var(--space-4);
}

.footer-brand p {
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: grid;
  gap: var(--space-3);
}

.footer-col a {
  font-size: 0.9375rem;
  text-decoration: none;
}

.footer-col a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line-soft);
  color: var(--color-ink-soft);
  font-size: 0.875rem;
}

@media (min-width: 48rem) {
  .site-nav {
    display: block;
  }

  .menu-toggle,
  .mobile-menu {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}