/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
  body { overflow-x: hidden; }
  img { max-width: 100%; height: auto; }

  /* ── Header scroll state ── */
  #site-header.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(15,42,74,0.08);
  }

  /* ── Service card ── */
  .service-card { cursor: default; }

  /* ── Floating animations ── */
  @keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
  }
  @keyframes float-delayed {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
  }
  .animate-float { animation: float 3.5s ease-in-out infinite; }
  .animate-float-delayed { animation: float-delayed 4s ease-in-out infinite 0.8s; }

  /* ── Scroll reveal ── */
  .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ── Mobile menu ── */
  .mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(15,42,74,0.06);
  }
  .mobile-link:last-child { border-bottom: none; }

  /* ── Custom scrollbar ── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #f0faf8; }
  ::-webkit-scrollbar-thumb { background: #0d7377; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #0a5c60; }

  /* ── Focus styles ── */
  :focus-visible { outline: 2px solid #0d7377; outline-offset: 2px; }

  /* ── Responsive adjustments ── */
  @media (max-width: 640px) {
    .font-heading { font-size: 1rem; }
  }