div         { display: none; }
:link       { color: #66CCFF; }
:visited    { color: #9999FF; }
:active     { color: #FF9999; }
strong {
    color: white;
}
h1 {
    color: white;
    font-style: italic;
    font-weight: bold;
    text-align: center;
}
h2 {
    color: white;
    font-weight: bold;
}
li {
    color: white;
}
.lightness {
    display: inline;
    background-color: white;
    color: gray;
}
.darkness {
    display: block;
    background-color: black;
    color: silver;
    margin: 5;
    padding: 25;
}
.emptiness {
    display: block;
    background-color: black;
    color: silver;
    border-width: 0;
    padding: 0;
    margin: 0;
}
.middleone {
    display: inline;
    vertical-align: middle;
    background-color: black;
    color: silver;
    border-width: 0;
    padding: 0;
    margin: 0;
}