/* ── 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.revealed {
      opacity: 1;
      transform: translateY(0);
    }
    .feature-item {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.5s ease, transform 0.5s ease;
    }
    .feature-item.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ── Navbar scroll state ── */
  #navbar.scrolled {
    background: rgba(2, 6, 23, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
  }
  #navbar.scrolled .nav-logo-text {
    color: #f8fafc;
  }

  /* ── Smooth scroll ── */
  html {
    scroll-behavior: smooth;
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
  }

  /* ── Selection color ── */
  ::selection {
    background: rgba(13, 148, 136, 0.2);
    color: #134e4a;
  }

  /* ── Custom scrollbar ── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #f8fafc; }
  ::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #64748b; }

  /* ── Mobile menu transitions ── */
  #mobile-menu.open {
    opacity: 1;
    pointer-events: all;
  }

  /* ── Gallery grid auto rows ── */
  .auto-rows-\[200px\] {
    grid-auto-rows: 200px;
  }
  @media (min-width: 768px) {
    .auto-rows-\[200px\] {
      grid-auto-rows: 220px;
    }
  }