#menu {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0; 
    font-size: 1.25em;
}

#menu .menu-background {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0; 
    background: white;
    opacity: 0.5;
}

#menu .menu-body {
    position: absolute;
    top: 0;
    left: 0;
    top: 0;
    bottom: 0;
    background: white;
    border: 1px solid #428BCA;
    box-shadow: 1px 1px 3px silver;
}

#menu .menu-body .menu-group{
    background: #428BCA;
}

#menu .menu-body > * {
    padding: 10px 20px 10px 10px;
}

#menu .menu-body > a {
    display: block;
    padding-left: 30px;
}