/* ── Base & Utilities ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
  body { margin: 0; }

  /* ── Scroll Reveal (progressive enhancement) ── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(32px);
      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; }
  }

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

  /* ── Navbar scroll state ── */
  #site-nav.scrolled {
    box-shadow: 0 1px 20px rgba(27, 67, 50, 0.08);
  }

  /* ── Custom selection ── */
  ::selection {
    background: rgba(27, 67, 50, 0.15);
    color: #1B4332;
  }

  /* ── Smooth image loading ── */
  img {
    background-color: #dce8e1;
  }

  /* ── Form focus rings ── */
  input:focus, select:focus, textarea:focus {
    outline: none;
  }

  /* ── Mobile menu transition ── */
  #mobile-menu {
    animation: slideDown 0.3s ease forwards;
  }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }