.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.8;
    background-color: #fff;
    z-index: 9999999999;
}
.loader_data {
    --dim: 3rem;
    width: var(--dim);
    height: var(--dim);
    position: absolute;
    animation: spin988 2s linear infinite;
    top: 50%;
    left: 50%;
}

    .loader_data .circle {
        /* --color: #333;*/
        --color: #252be6;
        --dim: 1.2rem;
        width: var(--dim);
        height: var(--dim);
        background-color: var(--color);
        border-radius: 50%;
        position: absolute;
    }

        .loader_data .circle:nth-child(1) {
            top: 0;
            left: 0;
        }

        .loader_data .circle:nth-child(2) {
            top: 0;
            right: 0;
        }

        .loader_data .circle:nth-child(3) {
            bottom: 0;
            left: 0;
        }

        .loader_data .circle:nth-child(4) {
            bottom: 0;
            right: 0;
        }

@keyframes spin988 {
    0% {
        transform: scale(1) rotate(0);
    }

    20%, 25% {
        transform: scale(1.3) rotate(90deg);
    }

    45%, 50% {
        transform: scale(1) rotate(180deg);
    }

    70%, 75% {
        transform: scale(1.3) rotate(270deg);
    }

    95%, 100% {
        transform: scale(1) rotate(360deg);
    }
}