.mover {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    animation: moveMover 30s linear infinite;
    transform: scale(0.267);
    transform-origin: center center;
    background: radial-gradient(circle, 
        rgba(255,255,255,1) 0%, 
        rgba(255,255,255,0.9) 20%,
        rgba(255,255,255,0.7) 40%,
        rgba(255,255,255,0.4) 60%,
        rgba(255,255,255,0.2) 80%,
        rgba(255,255,255,0) 100%
    );
}

@keyframes moveMover {
    0% { left: 0%; top: 65%; }
    100% { left: 100%; top: 35%; }
}