/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { font-family: 'DM Sans', system-ui, sans-serif; color: #334155; background: #fff; -webkit-font-smoothing: antialiased; }

  /* ── Hero stat cards ── */
  @media (prefers-reduced-motion: no-preference) {
    .stat-card {
      opacity: 0;
      transform: translateY(24px);
      animation: cardFloat 0.7s ease forwards;
    }
    .card-1 { animation-delay: 0.2s; }
    .card-2 { animation-delay: 0.4s; }
    .card-3 { animation-delay: 0.6s; }
    .card-4 { animation-delay: 0.8s; }

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

  /* ── Scroll reveal (progressive enhancement) ── */
  .reveal {
    opacity: 1;
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.revealed {
    opacity: 1;
    transform: none;
  }

  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
    }
    .reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ── Service cards ── */
  .service-card {
    opacity: 1;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  @media (prefers-reduced-motion: no-preference) {
    .service-card {
      opacity: 0;
      transform: translateY(20px);
    }
    .service-card.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ── Navbar scroll state ── */
  #navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
  }

  /* ── Active nav link ── */
  .nav-link.active {
    color: #0d9488;
    background: #f0fdfa;
  }

  /* ── Selection ── */
  ::selection { background: #ccfbf1; color: #134e4a; }

  /* ── Focus visible ── */
  :focus-visible { outline: 2px solid #14b8a6; outline-offset: 2px; border-radius: 8px; }

  /* ── Smooth image loading ── */
  img { loading: lazy; }