html { scroll-behavior: smooth; }
        .hero-glow { box-shadow: 0 0 50px rgba(59, 130, 246, 0.2); }
        .breathing { animation: breathe 3s ease-in-out infinite; }
        @keyframes breathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } }
        .nav-link:hover { color: #2563eb; text-decoration: underline; }