body{
    margin: 0;
    height: 100vh;
    background: linear-gradient(45deg, #c57300, #905200, #0059ff, #ffcc00);
    background-size: 100000% 100000%;
    animation: animarFundo 30s infinite;
}

@keyframes animarFundo {
    0% {background-position: 0% 50%;}
    50% {background-position: 100% 50%;}
    100% {background-position: 0% 50%;}
}