a {
    color: palegreen;
}
body {
    background: black;
    color: white;
}

.error{
    background: red;
    color: black;
    padding: 3px;
}

.error button{
    margin: 2px 5px;
}
#navi .button{
    border: 1px solid red;
    padding: 2px;
    margin: 2px;
    text-decoration: none;
}