body {
            box-sizing: border-box;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }
        
        @keyframes splash {
            0% { transform: scale(1) rotate(0deg); }
            50% { transform: scale(1.1) rotate(5deg); }
            100% { transform: scale(1) rotate(0deg); }
        }
        
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-10px); }
            60% { transform: translateY(-5px); }
        }
        
        .animate-float { animation: float 3s ease-in-out infinite; }
        .animate-splash { animation: splash 2s ease-in-out infinite; }
        .animate-fadeInUp { animation: fadeInUp 0.8s ease-out; }
        .animate-bounce-custom { animation: bounce 2s infinite; }
        
        .gradient-bg {
            background: linear-gradient(135deg, #ff6b6b, #feca57, #48dbfb, #ff9ff3, #54a0ff);
            background-size: 400% 400%;
            animation: gradientShift 8s ease infinite;
        }
        
        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        .card-hover {
            transition: all 0.3s ease;
        }
        
        .card-hover:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 20px 40px rgba(0,0,0,0.2);
        }
        
        .btn-glow {
            box-shadow: 0 0 20px rgba(255, 107, 107, 0.5);
            transition: all 0.3s ease;
        }
        
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(255, 107, 107, 0.8);
            transform: translateY(-2px);
        }
        
        .page {
            display: none;
        }
        
        .page.active {
            display: block;
        }
        
        .nav-link {
            transition: all 0.3s ease;
        }
        
        .nav-link:hover {
            transform: translateY(-2px);
        }