html { scroll-behavior: smooth; }
        .fade-in { opacity: 0; transform: translateY(30px); transition: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
        .fade-in.visible { opacity: 1; transform: translateY(0); }
        .stagger-1 { transition-delay: 0.1s; }
        .stagger-2 { transition-delay: 0.2s; }
        .stagger-3 { transition-delay: 0.3s; }
        .stagger-4 { transition-delay: 0.4s; }
        .stagger-5 { transition-delay: 0.5s; }
        .stagger-6 { transition-delay: 0.6s; }