html { scroll-behavior: smooth; }
    body { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
    .glow-ring {
      box-shadow: 0 0 0 1px rgba(255,255,255,.10), 0 18px 60px rgba(37,99,235,.25), 0 0 70px rgba(59,130,246,.18);
      animation: breathing 4.5s ease-in-out infinite;
    }
    @keyframes breathing {
      0%, 100% { transform: translateY(0px) scale(1); box-shadow: 0 0 0 1px rgba(255,255,255,.10), 0 18px 60px rgba(37,99,235,.22), 0 0 70px rgba(59,130,246,.16); }
      50% { transform: translateY(-3px) scale(1.01); box-shadow: 0 0 0 1px rgba(255,255,255,.14), 0 22px 72px rgba(37,99,235,.32), 0 0 90px rgba(59,130,246,.24); }
    }