html, body {
margin: 0px;
padding: 0px;
}

html {
height: 100%;
overflow: hidden;
}

.bg {
background-image: url(bg.jpg);
background-position: center;
background-size: cover;
}

.logo {
width: 300px;
height: 210px;
background-image: url(logo.png);
background-size: 100% 100%;
position: absolute;
}