table.grid {
    color: #000;
    font-family: Arial, sans-serif;
    font-size: 16px;
    border-spacing: 0px;
}
/* Wrap a cell in div.c when you need to put a small number in the corner.
 * It's annoying, but it's the only way to make that work on all browsers. */
.c {
    display: block;
    position: relative;
    height: 100%;
    width: 100%;
    line-height: 22px;
    vertical-align: middle;
    text-align: center;
}
.grid td {
    position: relative;
    background-color: #fff;
    border: 1px solid #777;
    width: 22px;
    height: 22px;
    margin: 0;
    vertical-align: middle;
    text-align: center;
}
.grid td.gap {
    border: none;
    background-color: none;
}
.grid td .number {
    display: block;
    position: absolute;
    z-index: 2;
    font-size: .7em;
    line-height: 1em;
    top: 1px;
    left: 1px;
}
.grid td.empty {
    background-color: #000;
}

li.clue {
    margin: 0;
    padding: 0;
}
table.clues ul {
    margin: 0;
    padding: 0;
}
table.clues td {
    vertical-align: top;
    padding-right: 2em;
}