body {
}

#dvSurveyPopup {
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background: rgba(0,0,0,.6);
    z-index: 99999;
}

.surveybox {
    width: 768px;
    height: 432px;
    /*background: url(images/BI-Survey_1024x576.jpg) no-repeat 50% 50%;*/
    background: url(/Content/css/images/BI-Survey_1024x576.jpg) no-repeat 50% 50%;
    background-size: cover;
    border-radius: 10px;
    position: fixed;
    top: calc(50% - 275px);
    left: calc(50% - 375px);
    box-shadow: 0 0 5px rgba(0, 0, 5, 0.5);
    cursor: pointer;
    z-index: 0;
}

    .surveybox a.close {
        display: block;
        width: 20px;
        height: 20px;
        position: absolute;
        right: 10px;
        top: 10px;
        background-color: gray;
        color: #fff;
        color: black;
        text-align: center;
        z-index: 999999999;
        border-radius: 3px;
    }

        .surveybox a.close:hover {
            color: white;
            background-color: red;
            cursor: default;
        }

@media (max-width: 991.98px) {
    .surveybox {
        width: 100%;
        height: 50%;
        background-size: contain;
        background-position: top;
        left: unset;
    }

        .surveybox a.close {
            right: unset;
            top: 10px;
            left: 90%;
        }
}