html, body, .fullscreen
{
    height: 100%;
}

body
{
    overflow: hidden;
    width: 100%;
    background-color: black;
    color: white;
}

.controls
{
    margin-top: 10px;
}

.game
{
    background-color: black;
    width: 100%;
}

.centered
{
    display: table;
    margin: 0 auto;
}

.keys
{
    margin: 15px 0;
}

.keys dt
{
    display: inline-block;
    margin-right: 15px;
}

.keys dd
{
    display: inline-block;
    margin-left: 0;
    margin-right: 25px;
}