.box-card {
    width: 50px;
    height: 50px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 1s ease;
    cursor: pointer;
    animation: rotate3d 8s infinite linear;
}

    .box-card:hover {
        animation: rotate3d 8s infinite linear;
    }

.face {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    backface-visibility: visible;
    background: linear-gradient(145deg, #2a2a2a, #383838);
    transition: all 0.3s ease;
    overflow: hidden;
}

    .face::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
        top: -100%;
        left: -100%;
        transition: all 0.5s ease;
        transform: translateZ(20px);
    }

    .face::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient( 135deg, transparent 0%, rgba(255, 255, 255, 0.05) 50%, transparent 100% );
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .face:hover::before {
        top: 100%;
        left: 100%;
    }

    .face:hover::after {
        opacity: 1;
    }

.front {
    transform: translateZ(25px);
}

.back {
    transform: translateZ(-25px) rotateY(180deg);
}

.right {
    transform: translateX(25px) rotateY(90deg);
}

.left {
    transform: translateX(-25px) rotateY(-90deg);
}

.top {
    transform: translateY(-25px) rotateX(90deg);
}

.bottom {
    transform: translateY(25px) rotateX(-90deg);
}

@keyframes rotate3d {
    0% {
        transform: rotateX(0) rotateY(0);
    }

    25% {
        transform: rotateX(90deg) rotateY(90deg);
    }

    50% {
        transform: rotateX(180deg) rotateY(180deg);
    }

    75% {
        transform: rotateX(270deg) rotateY(270deg);
    }

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

@media (max-width: 768px) {
    .box-card {
        width: 150px;
        height: 150px;
    }

    .front {
        transform: translateZ(75px);
    }

    .back {
        transform: translateZ(-75px) rotateY(180deg);
    }

    .right {
        transform: translateX(75px) rotateY(90deg);
    }

    .left {
        transform: translateX(-75px) rotateY(-90deg);
    }

    .top {
        transform: translateY(-75px) rotateX(90deg);
    }

    .bottom {
        transform: translateY(75px) rotateX(-90deg);
    }
}