body {
    background-color: white;
    font-family: cursive;
    font-size: 14pt;
}
#controls, #overall, #puzzlearea {
    width: 400px;
}
#controls {
    padding-top: 10px;
    text-align: center;
}
h1 {
    margin: 10px 0px;
    text-align: center;
}
/* Used to center the puzzle. */

#overall {
    margin-left: auto;
    margin-right: auto;
}
/* The area that holds the 15 puzzle pieces. */

#puzzlearea {
    font-family: sans-serif;
    font-size: 32pt;
    height: 400px;
    padding: 0px;
    position: relative;
}
/* This class should be applied to each of the 15 puzzle pieces. */

.puzzlepiece {
    background-image: url(background.jpg);
    border: 2px solid black;
    height: 96px;
    line-height: 96px;
    position: absolute;
    text-align: center;
    vertical-align: middle;
    width: 96px;
}
/* This class should be applied to a puzzle piece that can be moved. */

.movablepiece:hover {
    border-color: red;
    color: #006600;
    text-decoration: underline;
}