body { margin: 0; }
* { box-sizing: border-box; }

/* Top nav: 3 tabs, no site nav/cart/logo lockup — this is an internal
   reference repo, not a page of the live site, so it gets its own
   minimal identity bar instead of reusing the storefront nav. */
.ir-nav {
  position: sticky; top: 0; z-index: 100;
  padding: var(--space-4) var(--space-6);
  display: flex; align-items: center; gap: var(--space-8);
}
.ir-nav-brand {
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  color: var(--color-text-primary); margin-right: auto;
}
.ir-nav-tabs { display: flex; gap: 8px; }
.ir-tab {
  font-family: var(--font-sans); font-size: 13px; font-weight: 600;
  color: var(--color-text-secondary); text-decoration: none;
  padding: 8px 16px; border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.ir-tab:hover { color: var(--color-text-primary); border-color: var(--color-border-subtle); }
.ir-tab.is-active { background: var(--color-accent-lime); color: var(--purple-900); }

.hero-cta {
  padding: 12px 32px; border-radius: var(--radius-pill); background: var(--color-accent-lime);
  border: none; color: var(--color-text-on-lime); font-weight: 600; font-family: var(--font-sans);
  cursor: pointer; font-size: 14px; transition: background .15s ease;
}
.hero-cta:hover { background: var(--color-accent-orange); }

@media (max-width: 640px) {
  .ir-nav { flex-wrap: wrap; gap: var(--space-3); }
  .ir-nav-brand { width: 100%; margin-right: 0; }
}