/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body { margin: 0; }

  /* ── Utility: no-underline ── */
  .no-underline { text-decoration: none; }

  /* ── Nav scroll state ── */
  #site-header {
    background: transparent;
  }
  #site-header.scrolled {
    background: rgba(253, 251, 247, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.06);
  }

  /* ── Reveal animations (progressive enhancement) ── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                  transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }
  /* Fallback for no-JS / reduced-motion: always visible */
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
  }

  /* ── Mobile menu transition ── */
  #mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  }
  #mobile-menu.open {
    max-height: 400px;
  }