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

  /* ── Scroll Reveal (progressive enhancement) ── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .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; }
    .reveal-delay-4 { transition-delay: 0.4s; }
  }

  /* Fallback: ensure content is visible even if JS is disabled */
  .reveal { opacity: 1; transform: none; }

  /* ── Navbar scroll effect ── */
  #navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  }

  /* ── Custom scrollbar ── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #f5f5f7; }
  ::-webkit-scrollbar-thumb { background: #d1d1d8; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #a8a8b4; }