body {
    font-family: Tahoma, Verdana, sans-serif;
    font-size: 18px;
}

#board {
    width: 100%;
    height: 300px;
    border: 1px solid black;
}

#hand {
    width: 100%;
    height: 100px;
    border: 1px solid black;
    background-color: blue;
    clear: both;
}

#board .square {
    width: 30px;
    height: 30px;
    border: 1px solid black;
    float: left;
}

#board .row {
    width: 100%;
    clear: both;
}

#hand .tile {
    width: 27px;
    height: 27px;
    float: left;
    border: 2px solid red;
    background-color: yellow;
    margin: 2px;
    text-align: center;
    cursor: pointer;
}