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

  /* ── Navigation ── */
  #nav {
    transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
  }
  #nav.scrolled {
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
    padding-top: 0;
    padding-bottom: 0;
  }
  #nav .max-w-7xl {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }
  .nav-link {
    position: relative;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #5eead4;
    border-radius: 1px;
    transition: width 0.3s ease;
  }
  .nav-link:hover::after {
    width: 100%;
  }

  /* ── Mobile Menu ── */
  #mobileMenu {
    animation: slideDown 0.3s ease;
  }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .mobile-link {
    position: relative;
    display: block;
  }

  /* ── Hero ── */
  #hero {
    position: relative;
  }
  #hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, white, transparent);
    pointer-events: none;
    z-index: 1;
  }

  /* ── Amenity Cards ── */
  .amenity-card {
    transform: translateY(0);
  }
  .amenity-card:hover {
    transform: translateY(-4px);
  }

  /* ── Gallery ── */
  .gallery-item {
    cursor: pointer;
    position: relative;
  }
  .gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(13, 148, 136, 0);
    transition: background 0.3s ease;
    border-radius: inherit;
  }
  .gallery-item:hover::after {
    background: rgba(13, 148, 136, 0.1);
  }

  /* ── Scroll Animations ── */
  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal-delay-1 { transition-delay: 0.1s; }
  .reveal-delay-2 { transition-delay: 0.2s; }
  .reveal-delay-3 { transition-delay: 0.3s; }
  .reveal-delay-4 { transition-delay: 0.4s; }

  /* ── Custom Scrollbar ── */
  ::-webkit-scrollbar { width: 8px; }
  ::-webkit-scrollbar-track { background: #f1f5f9; }
  ::-webkit-scrollbar-thumb { background: #99f6e4; border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: #14b8a6; }

  /* ── Focus Styles ── */
  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* ── Responsive tweaks ── */
  @media (max-width: 640px) {
    .font-serif { line-height: 1.15; }
  }