/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { -webkit-font-smoothing: antialiased; }

  /* ── Selection ── */
  ::selection { background: #e9bbf9; color: #4b1a5c; }

  /* ── Scrollbar ── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #faf0ff; }
  ::-webkit-scrollbar-thumb { background: #d98df4; border-radius: 999px; }
  ::-webkit-scrollbar-thumb:hover { background: #a832d0; }

  /* ── Nav shadow on scroll ── */
  #site-header.scrolled { box-shadow: 0 4px 20px rgba(168, 50, 208, 0.08); }

  /* ── 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.visible {
      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; }
  }

  /* ── Mobile menu transition ── */
  #mobile-menu { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; }
  #mobile-menu.open { max-height: 300px; padding-top: 0.5rem; padding-bottom: 0.5rem; }

  /* ── Focus visible ── */
  :focus-visible { outline: 2px solid #a832d0; outline-offset: 2px; }