html, body {
    color: #00ffff;
    background-color: #002222;
    font-family: monospace;
    font-size: 14px;
}
a, a:visited {
    color: #ffff00;
    text-decoration: none; 
    outline: none;
}
a:hover, a:focus {
    color: #ffff00;
    text-decoration: underline;
}
a:active {
    color: #ff00ff;
    text-decoration: underline;
}
#board {
    max-width: 800px;
    display: block;
    margin: auto;
    width: 100%;
    box-sizing: border-box;
}
.center {
    text-align:center;
}
code {
    color: #002222;
    background-color: #00ffff;
    padding: 0px 5px 0px 5px;
    border-radius: 2px;
}