body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}
.bg {
    background-image: url('../images/el-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed; /* removes this for mobile if needed */
    min-height: 100vh;
    width: 100%;
}