.loader {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    box-sizing: border-box;
    background-color: rgba(96, 96, 96, 0.87);
    cursor: wait;
    z-index: 100000;
}

    .loader .esterno {
        position: absolute;
        top: 25%;
        left: 33%;
        width: 33%;
        max-height: 10rem;
        height: 50%;
        background: url("/images/main_loader.gif") no-repeat center center;
        margin: auto;
        background-color: white;
        background-size: 100%;
        border-radius: 50%;
        opacity: 0.7;
    }