html, body { 
   height: 100%; 
}
    
body {
background: url(../img/bg.png);
background-position: center;
background-repeat: no-repeat;
background-size: cover;

}

#content {
    color: #fff;
    padding-top: 2.75%;
    width: 100%;
    text-align: center;
}

img {
max-width: 100%;
height: auto;
}