#left { width:30%; float:left; }
#right { width:70%; float:right; }
#settings, #submit-box, #results, #board { border: 1px solid #000; margin:1rem; padding:1rem; }
#results { display:none; }
#settings-save { margin-top: 1rem; }
#settings span { padding-right: 15px; }
#container {
    position: relative;
    outline: 2px solid #000;
    font-size: 0;
    margin: auto;
    padding: 0;
    border: none;
}
.grid {
    margin: 0;
    padding: 0;
    border: none;
    outline: 1px solid #000;
    display: inline-block;
    background-position: center;
    background-size: 100%;
}
.grid:hover { cursor: pointer; background-color: #fff1a6; }