Revise paste estilos.css

.contenedor {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 150px;
    padding-bottom: 150px;
}

.dado {
    position: relative;
    width: 200px;
    height: 200px;
    transform-style: preserve-3d;
    transform: rotateY(185deg) rotateX(150deg) rotateZ(315deg);
    animation: rotate 5s linear infinite;
}

.lado {
    width: 100%;
    height: 100%;
    background: #da0060;
    border: 2px solid black;
    position: absolute;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lado:before {
    content: "";
    width: 20%;
    height: 20%;
    background: black;
    border-radius: 50%;
}

.base {
    width: 100%;
    height: 100%;
    transform: translateY(73px) rotateX(90deg);
    border: 0;
    background: blue;
}

.uno {
    transform: translateZ(100px);
}

.dos {
    transform: translateX(-100px) rotateY(-90deg);
}

.dos:before {
    background: transparent;
    box-shadow: #000 -50px -50px 0px 0px, #000 50px 50px 0px 0px;
}

.tres {
    transform: translateY(100px) rotateX(90deg);
}

.tres:before {
    box-shadow: #000 -50px 50px 0px 0px, #000 50px -50px 0px 0px;
}

.cuatro {
    transform: translateY(-100px) rotateX(90deg);
}

.cuatro:before {
    background: transparent;
    box-shadow: #000 -50px 50px 0px 0px, #000 -50px -50px 0px 0px, #000 50px 50px 0px 0px, #000 50px -50px 0px 0px;
}

.cinco {
    transform: translateX(100px) rotateY(90deg);
}

.cinco:before {
    box-shadow: #000 -50px -50px 0px 0px, #000 -50px 50px 0px 0px, #000 50px -50px 0px 0px, #000 50px 50px 0px 0px;
}

.seis {
    transform: translateZ(-100px);
}

.seis:before {
    background: transparent;
  box-shadow: #000 -50px -50px 0px 0px, #000 -50px 0px 0px 0px, #000 -50px 50px 0px 0px, #000 50px -50px 0px 0px, #000 50px 0px 0px 0px, #000 50px 50px 0px 0px;
}

@keyframes rotate {
    from {
        transform: rotateY(0) rotateX(30deg) rotateZ(30deg);
    }
    to {
        transform: rotateY(360deg) rotateX(30deg) rotateZ(30deg);
    }
}