.popup-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .4);
    z-index: 10000;
}

.popup-main {
    position: fixed;
    top: 105px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 850px;
    min-height: 590px;
    max-width: 90%;
    border-radius: 3px;
    padding: 10px 20px;
    background-color: #fff;
}

    .popup-main .row {
        margin: 0;
    }