body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

@keyframes rotate {
    100% {
        transform: rotate(1turn);
    }
}

.cn_colors {
    position: relative;
    z-index: 0;
    width: 400px;
    height: 300px;
    border-radius: 10px;
    overflow: hidden;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
    font-weight: bold;

    &::before {
        content: '';
        position: absolute;
        z-index: -2;
        left: -50%;
        top: -50%;
        width: 200%;
        height: 200%;
        background-color: rgba(0, 0, 0, 0.125);
        background-repeat: no-repeat;
        background-size: 50% 50%, 50% 50%;
        background-position: 0 0, 100% 0, 100% 100%, 0 100%;
        /*background-image: linear-gradient(#399953, #399953), linear-gradient(#fbb300, #fbb300), linear-gradient(#d53e33, #d53e33), linear-gradient(#377af5, #377af5);*/
        background-image: linear-gradient(#571492, #571492), linear-gradient(#099999, #099999);
        animation: rotate 5s linear infinite;
    }

    &::after {
        content: '';
        position: absolute;
        z-index: -1;
        left: 6px;
        top: 6px;
        width: calc(100% - 12px);
        height: calc(100% - 12px);
        background: white;
        border-radius: 5px;
    }
}