main.css

.game-field {
    position: relative;
    height: 220px;
    width: 220px;
}

.info-box {
    width: 220px;
    margin: 0 0 10px 0;
}

.action-buttons {
    margin: 5px 0 0 0;
}

.game-field p {
    margin: 13px;
}

.action-buttons span {
    cursor: pointer;
    background: #edc99d;
    padding: 5px;
    box-shadow: 1px 1px 5px #777;
    border-radius: 5px;
    width: 205px;
    text-align: center;
    display: inline-block;
    -moz-user-select: -moz-none;
    -o-user-select: none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

.action-buttons span:active {
    box-shadow: none;
}

.game-field div {
    position: absolute;
    width: 50px;
    height: 50px;
    background: #edc99d;
    text-align: center;
    vertical-align: middle;
    font-size: 26px;
    line-height: 22px;
    border-radius: 10px;
    box-shadow: 1px 1px 3px #777;
    color: #535353;
    cursor: pointer;

    -moz-user-select: -moz-none;
    -o-user-select: none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

.game-field .null-field {
    box-shadow: none !important;
    background: none !important;
}

.counter-text {
    padding: 10px 0 0 0;
    float: left;
}

.loader {
    background: url("loader.gif") no-repeat 0 50% !important;
    width: 42px;
    height: 37px;
    float: right;
}

.hide {
    display: none !important;
}

.clear {
    clear: both;
}

.error {
    margin: 3px 0;
    color: red;
    font-size: 14px;
}