*, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { margin: 0; }
  img { max-width: 100%; display: block; }
  a { text-decoration: none; }
  ::selection { background: rgba(212, 168, 67, 0.3); color: #fff; }

  /* NAV SCROLLED STATE */
  #site-header.scrolled {
    background: rgba(15, 26, 46, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 4px 30px rgba(0,0,0,0.3);
  }

  /* SERVICE CARDS */
  .service-card {
    will-change: transform;
  }

  /* MOBILE MENU */
  #mobile-menu {
    animation: slideDown 0.25s ease-out;
  }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* SELECT STYLING */
  select option {
    background: #0f1a2e;
    color: #fff;
  }

  /* REDUCED MOTION */
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .service-card { transition: none; }
    .service-card img { transition: none; }
  }

  /* RESPONSIVE */
  @media (max-width: 640px) {
    .font-display { line-height: 1.15; }
  }