body {
    width: 100%;
    background-image: linear-gradient(rgba(5, 59, 125, 0.9), rgba(5, 59, 125, 0.9)), url('../images/bg_image.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 50% 0;
    background-attachment: fixed;
}
.display-div{
    width: 100%;
    margin-top: 160px;
    min-height: calc(100vh - 300px);
    padding: 50px 5%;
}
.display-div form{
    width: 50%;
}

@media (max-width:768px){
    .display-div form{
        width: 100%;
    }
}