#rubik-cube {
    width: 300px;
    height: 300px;
    perspective: 600px;
    margin: 50px auto;
    position: relative;
}

.cube-face {
    position: absolute;
    width: 100px;
    height: 100px;
    background-color: #fff;
    border: 1px solid #000;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
}

.front {
    transform: translateZ(50px);
}

.back {
    transform: rotateY(180deg) translateZ(50px);
}

.right {
    transform: rotateY(90deg) translateZ(50px);
}

.left {
    transform: rotateY(-90deg) translateZ(50px);
}

.top {
    transform: rotateX(90deg) translateZ(50px);
}

.bottom {
    transform: rotateX(-90deg) translateZ(50px);
}