/* ===== Base & Utilities ===== */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { margin: 0; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

  /* ===== Hero Animations ===== */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .animate-fade-up {
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  /* ===== Hero Orbs ===== */
  .hero-orb {
    animation: orbFloat 8s ease-in-out infinite;
  }
  .hero-orb-1 { animation-delay: 0s; }
  .hero-orb-2 { animation-delay: -3s; }
  .hero-orb-3 { animation-delay: -5s; }

  @keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -30px) scale(1.05); }
    66% { transform: translate(-15px, 15px) scale(0.95); }
  }

  /* ===== Scroll Reveal ===== */
  .reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }

  /* Mobile menu */
  #mobile-menu.open {
    opacity: 1;
    pointer-events: all;
  }
  #mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
  }

  /* Mobile link transitions */
  .mobile-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
  }
  #mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
  }
  #mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
  #mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
  #mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
  #mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
  #mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

  /* Menu button animation */
  .menu-line { display: block; }
  #menu-btn.active .menu-line:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
  }
  #menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  #menu-btn.active .menu-line:nth-child(3) {
    transform: translateY(-4px) rotate(-45deg);
    width: 4.5;
  }

  /* ===== Focus Styles ===== */
  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #2d7d8f;
    outline-offset: 2px;
  }

  /* ===== Reduced Motion ===== */
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
    .reveal {
      opacity: 1;
      transform: none;
    }
  }

  /* ===== Scroll Reveal (progressive enhancement) ===== */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
    }
    .reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ===== Selection ===== */
  ::selection {
    background: rgba(45, 125, 143, 0.2);
    color: inherit;
  }

  /* ===== Scrollbar ===== */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #f5f0eb; }
  ::-webkit-scrollbar-thumb { background: #b8b3aa; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #918a80; }