* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.floor {
    width: 15em;
    height: 15em;
    position: absolute;
    top: 1em;
    background-image: radial-gradient(rgb(32 32 32 / .75) 10%, rgb(32 32 32 / .05) 20%, rgb(13 28 5 / 1) 60%), 
        repeating-conic-gradient(from 45deg, rgb(240 240 240 / .5) 0deg 90deg, rgb(64 64 64 / .5) 90deg 180deg);
    background-size: 100%, 1em 1em;
    transform: translate(-50%, -50%) rotateX(90deg);
}

main{
    font-size: 100px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 10em;
    perspective-origin: 50% calc(50% - 3em);
}

main{
    padding-bottom: 150px;
}

.scene{
    position:relative;
    transform-style: preserve-3d;
    animation: rotate 30s linear infinite;
}

.center{
    position: absolute;
    width: 0.25em;
    height: 0.25em;
    background-color: aqua;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.front, .back, .left, .right{
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgb(33 66 99 / .2);
    box-shadow: inset 0 0 0.5em 0 rgb(12 24 36 / 0.75);
}

.cube{
    position: absolute;
    width: 2em;
    height: 2em;
    transform-style: preserve-3d;
    top: -1em;
    left: -1em;
}

.front{
    transform: translateZ(1em);
}

.back{
    transform: rotateY(180deg) translateZ(1em);
}

.right{
    transform: rotateY(90deg) translateZ(1em);
}

.left{
    transform: rotateY(-90deg) translateZ(1em);
}

.top{
    transform: rotateX(90deg) translateZ(1em);
    height: 2em;
    width: 2em;
    background-color: rgba(57, 109, 162, 0.25);
    background-image: radial-gradient(rgb(32 32 32 / 0.75) 20%, rgb(32 32 32 / 0.05) 33%);
}

.bottom{
    transform: rotateX(90deg) translateZ(1em);
    height: 2em;
    width: 2em;
    background-color: rgba(57, 109, 162, 0.25);
}

body{
    background-color: rgb(32 32 32 / 1);
}

.ball{
    position: absolute;
    width: 1em;
    height: 1em;
    border-radius: 50%;
    left: -.55em;
    bottom: 1em;
    background-image: radial-gradient(circle at top, rgb(33 66 99 / 0.9), rgb(0 33 66 / 1));
    animation: rotate 30s linear infinite reverse;
}

@keyframes rotate{
    0%{
        transform: rotateY(0deg);
    }

    100%{
        transform: rotateY(360deg);
    }
}