/* ── Base & Utilities ── */
  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    overflow-x: hidden;
  }

  ::selection {
    background: rgba(13, 148, 136, 0.2);
    color: #0f766e;
  }

  /* ── Header ── */
  #header {
    background: transparent;
  }

  #header.scrolled {
    background: rgba(245, 244, 241, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
  }

  #header.scrolled .font-serif {
    color: #1e293b !important;
  }

  /* ── Navigation Links ── */
  .nav-link {
    position: relative;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: #0d9488;
    transition: width 0.3s ease;
  }

  .nav-link:hover::after {
    width: 100%;
  }

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

  .mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
  }

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

  #mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
  #mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
  #mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
  #mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
  #mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

  /* ── Hero Animations ── */
  .hero-title {
    opacity: 0;
    transform: translateY(30px);
    animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
  }

  .hero-subtitle {
    opacity: 0;
    transform: translateY(20px);
    animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards;
  }

  .hero-cta {
    opacity: 0;
    transform: translateY(20px);
    animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.75s forwards;
  }

  @keyframes heroIn {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ── Reveal Animations ── */
  .reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .reveal:nth-child(2) { transition-delay: 0.1s; }
  .reveal:nth-child(3) { transition-delay: 0.2s; }
  .reveal:nth-child(4) { transition-delay: 0.3s; }

  /* ── Product Cards ── */
  .group:hover .aspect-\[4\/3\] img {
    filter: brightness(1.05);
  }

  /* ── Form ── */
  input:focus,
  textarea:focus {
    background: rgba(255, 255, 255, 0.14);
  }

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

  ::-webkit-scrollbar-track {
    background: #f5f5f4;
  }

  ::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
  }

  /* ── Reduced Motion ── */
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      transition-duration: 0.01ms !important;
    }
    html {
      scroll-behavior: auto;
    }
    .reveal {
      opacity: 1;
      transform: none;
    }
  }

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