body {
    color: #000;
    font-family: sans-serif;
    padding: 0px;
    background: #98BEF0;
}

.stopwatch {
    margin: auto auto;
    width: 402px;
    height: 186px;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    position: absolute;
    border: 5px solid #000;
    overflow: hidden;
    padding: 30px;
    box-sizing: border-box;
    background: #fff;
}

.digit {
    width: 55px;
}

.digit-space {
    float: left;
    padding: 5px;
    text-align: center;
    font-size: 50px;
}

.controls {
    margin: 0 auto;
    width: 262px;
    display: block;
    clear: both;
}

.controls button {
    background-color: #fff;
    border: 2px solid #000;
    color: #000;
    font-size: 14px;
    padding: 10px;
}

.controls button:hover {
    background-color: #98BEF0;
    border: 2px solid #98BEF0;
    color: #fff;
}