.overlay-grid {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    position: absolute;
    background: rgb(1 1 1 / 4%);
    z-index: 2;
}

.overlay-grid-loader {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.overlay-grid-loader .loader {
    width: 40px;
    height: 40px;
    border: 4px solid #666;
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
    }

    @keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}