* {
    margin: 0;
}
.container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    color: #f0f0f0;
    background: linear-gradient(45deg, #141E30, #243B55, #243B55, #141E30);
    background-size: 400% 400%;
    animation: gradient 10s ease infinite;
}
h2 {
    font-weight: normal;
    font-size: 2.2em;
    letter-spacing: .12em;
}
@keyframes gradient {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}