.bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }
        .circle {
            position: absolute;
            border-radius: 50%;
            background: rgba(76, 175, 80, 0.1);
            animation: float 15s infinite linear;
        }

        @keyframes float {
            0% { transform: translateY(0) rotate(0deg); }
            100% { transform: translateY(-1000px) rotate(720deg); }
        }