/* ── Base & Utilities ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 64px; }
  body { margin: 0; -webkit-font-smoothing: antialiased; }

  /* ── Scroll Reveal (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);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
  }

  /* ── Nav shadow on scroll ── */
  #site-header.scrolled {
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
  }

  /* ── Mobile menu transition ── */
  #mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  #mobile-menu.open {
    max-height: 400px;
  }

  /* ── Subtle image zoom on hover ── */
  .group img {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }
</style>