/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body { margin: 0; }

  /* ── Nav scroll state ── */
  #nav.scrolled {
    background: rgba(7, 21, 38, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
  }

  /* ── Scroll reveal (progressive enhancement) ── */
  @media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
      opacity: 0;
      transform: translateY(32px);
      transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .scroll-reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .scroll-reveal:nth-child(2) { transition-delay: 0.08s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.16s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.24s; }
  }

  /* ── Hero reveals (always visible — no JS needed) ── */
  .reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
  }
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(24px);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .reveal:nth-of-type(1) { transition-delay: 0.1s; }
    .reveal:nth-of-type(2) { transition-delay: 0.25s; }
    .reveal:nth-of-type(3) { transition-delay: 0.4s; }
    .reveal:nth-of-type(4) { transition-delay: 0.55s; }
  }

  /* ── Image hover ── */
  .rounded-2xl.overflow-hidden img,
  .rounded-3xl.overflow-hidden img {
    display: block;
  }

  /* ── Selection ── */
  ::selection {
    background: rgba(75, 196, 168, 0.3);
    color: #071526;
  }

  /* ── Mobile menu transition ── */
  #mobile-menu {
    animation: slideDown 0.3s ease;
  }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }