body {
 font-family: "Bitter", serif;
 font-optical-sizing: auto;
 font-size: 20px;
 font-style: normal;
 font-weight: 400;
}
body, html {
 height: 100%;
 margin: 0;
 padding: 0;
}
#background {
 background-image: url("loginbackgroundimage.jpg");
 background-position: center;
 background-repeat: no-repeat;
 background-size: cover;
 height: 100%; 
}