.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}

.site-header .brand .name {
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 14px;
}

.site-header .brand .tagline {
  font-size: 11px;
  color: var(--color-ink-muted);
}

.cart-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-muted);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}

.cart-link .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff;
  font-size: 11px;
}

.customizer-shell {
  display: grid;
  grid-template-columns: 420px minmax(0, 1fr);
  gap: var(--space-6);
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--space-6);
}

.preview-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: sticky;
  top: 88px;
  align-self: start;
  max-width: 420px;
}

.options-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.page-shell {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

@media (max-width: 960px) {
  .customizer-shell {
    grid-template-columns: 1fr;
    padding: var(--space-4);
  }

  .preview-column {
    position: static;
    order: -1;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: var(--space-3) var(--space-4);
  }
}