#myModal .modal-dialog {
    position: absolute;
    top: 50% !important;
    transform: translate(0, -50%) !important;
    -ms-transform: translate(0, -50%) !important;
    -webkit-transform: translate(0, -50%) !important;
    margin: auto 35%;
    width: 30%;
    height: 40%;
}

#myModal .modal-content {
    min-height: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.loader {
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border-top: 16px solid blue;
    border-right: 16px solid green;
    border-bottom: 16px solid red;
    border-left: 16px solid #8e162b;
    width: 80px;
    height: 80px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

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

    100% {
        -webkit-transform: rotate(360deg);
    }
}

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

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