body {
       margin-left: 1em;
             margin-right: 30ex;
}

h1{
         background: blue;
         color: white;
}

h2{
        color: blue
}

.menu {
    position: fixed; 
    white-space: pre;
    top: 0.5ex; 
    right: 1ex; 
    width: 13em;
    margin: 3ex;	
    padding: 1px;
    background: yellow; 

}