/* ─── Base & Utilities ─── */
  html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
  }

  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  ::selection {
    background: #f9edc4;
    color: #1e2a42;
  }

  /* ─── Navigation ─── */
  #nav {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
  }

  #nav.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(17, 24, 39, 0.08);
    padding-top: 0;
    padding-bottom: 0;
  }

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

  #mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
  }

  .mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s ease;
  }

  #mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
  }

  #mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
  #mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
  #mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
  #mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }

  /* ─── Menu Button ─── */
  .menu-line {
    display: block;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  #menu-btn.active .menu-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  #menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
  }

  #menu-btn.active .menu-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* ─── Amenity Cards ─── */
  .amenity-card {
    transition: transform 0.3s ease, border-color 0.3s ease;
  }

  .amenity-card:hover {
    transform: translateY(-4px);
  }

  /* ─── Scroll Reveal (progressive enhancement) ─── */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .reveal.revealed {
      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; }
  }

  /* ─── Reduced motion ─── */
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .amenity-card:hover { transform: none; }
    .group:hover img { transform: none; }
  }

  /* ─── Focus styles ─── */
  a:focus-visible, button:focus-visible {
    outline: 2px solid #ebaa26;
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* ─── Custom scrollbar ─── */
  ::-webkit-scrollbar {
    width: 8px;
  }

  ::-webkit-scrollbar-track {
    background: #f0f3f9;
  }

  ::-webkit-scrollbar-thumb {
    background: #b8c7e0;
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: #8fa5cb;
  }