.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  background: transparent;
  transition: padding 0.25s ease, background-color 0.25s ease;
}

.site-header.is-scrolled {
  padding: 0.65rem 0;
  background: var(--card-bg-solid);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

@media (max-width: 1023px) {
  .nav {
    padding: 0 1.5rem;
  }
}