/* ─── Base & Utilities ─── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { margin: 0; }

  /* ─── Navbar scroll state ─── */
  #navbar.scrolled {
    background: rgba(255, 254, 248, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(4, 120, 87, 0.08), 0 4px 24px rgba(4, 120, 87, 0.06);
  }
  #navbar.scrolled .font-display { color: #064E3B; }

  /* ─── Mobile menu transitions ─── */
  #mobileMenu {
    animation: slideDown 0.3s ease forwards;
  }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  #mobileMenu.hidden { display: none; }

  .mobile-link {
    display: block;
    transition: color 0.2s, padding-left 0.2s;
  }
  .mobile-link:hover {
    color: #059669;
    padding-left: 8px;
  }

  /* ─── 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; }
  }

  /* ─── Reduced motion ─── */
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
  }

  /* ─── Custom scrollbar ─── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #ECFDF3; }
  ::-webkit-scrollbar-thumb { background: #047857; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #065F46; }
</style>