html {
    height: 100%;
}

body {
    height: 100vh;
    background-color: #1fa6ff;
    /*background-color: black;*/
    overflow: hidden;
}

.content {
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: .20em;
    box-shadow: 0 0 .25em rgba(0, 0, 0, .15);
    box-sizing: border-box;
    left: 50%;
    padding: 5vmin;
    position: fixed;
    text-align: center;
    top: 50%;
    transform: translate(-50%, -50%);
}

h1 {
    font-family: monospace;
}

.wave,
.wave::before,
.wave::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 250vw;
    height: 250vw;
    margin-left: -130vw;
    transform-origin: 50% 50%;
    background-color: transparent;
    border-radius: 38% 42%;
    box-shadow: inset 0 0 10vw rgba(50, 0, 150, 0.8);
    animation: spin 16s infinite linear;
    mix-blend-mode: multiply;
}

.wave::before {
    width: 106%;
    height: 95%;
    margin-top: -125vw;
    transform-origin: 49% 51%;
    border-radius: 40% 38%;
    box-shadow: inset 0 0 10vw rgba(80, 0, 150, 1);
    animation: spin 13s infinite linear;
}

.wave::after {
    width: 102%;
    height: 98%;
    margin-top: -125vw;
    transform-origin: 52% 49%;
    border-radius: 48% 42%;
    box-shadow: inset 0 0 10vw rgba(0, 200, 250, 0.9);
    animation: spin 11s infinite linear;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}