.spinner {
    display: flex;
    flex-direction: column;
    border: 16px solid silver;
    border-top: 16px solid #337AB7;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    animation: spin 700ms linear infinite;
    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 999999;
}


@keyframes spin {
    0% {
        transform: rotate(0deg)
    }

    100% {
        transform: rotate(360deg)
    }
}

.fondospinner {
    background: #000000;
    width: 100%;
    height: 100vh;
    filter: alpha(opacity=50);
    opacity: 0.5;
    margin: 0px;
    padding: 0px;
    position: fixed;
    left: 0px;
    top: 0px;
    right: 0px;
    z-index: 999999;
}