/* ── Base ── */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { margin: 0; }

  /* ── Nav ── */
  header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.3s ease;
  }
  header.nav-scrolled { box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06); }

  .nav-link { position: relative; }
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #e8735a;
    border-radius: 1px;
    transition: width 0.25s ease;
  }
  .nav-link:hover::after { width: 100%; }

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

  /* ── Service Cards ── */
  .service-card {
    background: white;
    border: 1px solid #f0f0f3;
    border-radius: 1.25rem;
    padding: 2rem;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  }
  .service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(232, 115, 90, 0.1);
    border-color: #fbc9b8;
  }

  /* ── Plan Cards ── */
  .plan-card { transition: transform 0.25s ease, box-shadow 0.25s ease; }
  .plan-card:hover { transform: translateY(-3px); }

  /* ── Scroll Reveal ── */
  .scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }

  @media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
      opacity: 0;
      transform: translateY(28px);
    }
    .scroll-reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ── Accessibility ── */
  :focus-visible {
    outline: 2px solid #e8735a;
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* ── Selection ── */
  ::selection { background: #fde5dc; color: #4a1610; }

  /* ── Utility ── */
  .no-underline { text-decoration: none; }