body {
    background: url(../Images/bg_car.jpg) no-repeat center center fixed #ecf0f1;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    -ms-background-size: cover;
    background-size: cover;
}

.full-height {
    height: 90%; /* fallback if needed */
    height: calc(100% - 100px);
}

footer {
    position: absolute;
    bottom: 0;
}

.btn-login {
    background-color: #333 !important;
}

@media only screen and (max-width : 767px) {
    footer {
        max-height: 100px;
    }
}

@media only screen and (min-width : 768px) and (max-width: 991px) {
    footer {
        max-height: 100px;
    }
}

@media only screen and (min-width : 992px) {
}