body {
	background: linear-gradient(-90deg, #858585, #4a3e3e, #1f1616, #646663);
	background-size: 400% 400%;
	animation: gradient 15s ease infinite;
	height: 100vh;
}

.container {
  
   position: absolute;
  top: 30%;
  left: 25%;
}
@keyframes gradient {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}