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

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

  /* ─── Scroll reveal (progressive enhancement) ─── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }
  /* Fallback: always visible if JS is disabled or prefers-reduced-motion */
  @media (prefers-reduced-motion: reduce) {
    .reveal {
      opacity: 1;
      transform: none;
    }
  }

  /* ─── Mobile menu transitions ─── */
  #mobileMenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  #mobileMenu.open {
    max-height: 400px;
  }

  /* ─── Nav scroll state ─── */
  .nav.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  }

  /* ─── Custom scrollbar ─── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #0f172a; }
  ::-webkit-scrollbar-thumb { background: #0d9488; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #2dd4bf; }