Code Details

.card {
    width: 190px;
    height: 254px;
    background: #07182E;
    position: relative;
    display: flex;
    place-content: center;
    place-items: center;
    overflow: hidden;
    border-radius: 20px;
}

.card h2 {
    z-index: 1;
    color: white;
    font-size: 2em;
}

.card::before {
    content: '';
    position: absolute;
    width: 100px;
    background-image: linear-gradient(180deg, rgb(0, 183, 255), rgb(255, 48, 255));
    height: 130%;
    animation: rotBGimg 3s linear infinite;
    transition: all 0.2s linear;
}

.card::after {
    content: '';
    position: absolute;
    background: #07182E;
    inset: 5px;
    border-radius: 15px;
}

@keyframes rotBGimg {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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