* {
    box-sizing: border-box
}

.container {
    width: 300px;
    overflow: hidden;
    margin: 50px auto 0 auto;
    -webkit-user-select: none;
    user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
}

.container span {
    width: 100%;
    display: block;
    text-align: center;
    font-family: sans-serif;
    color: #ffffff;
    font-size: 25px;
    background: #000000;
}

.container .box {
    float: left;
    width: 100px;
    height: 100px;
    border: 1px solid #000;
    transition: all .25s ease-in-out;
    font-family: sans-serif;
    font-size: 65px;
    text-align: center;
    line-height: 100px;
    cursor: pointer;
}

.container .box:hover {
    background: rgba(10, 10, 10, 0.5);
    color: #ffffff;
}

#play-again {
    background: rgb(30, 255, 0);
    color: #fff;
    font-weight: bold;
    border: 1px solid white;
    cursor: pointer;
    width: 200px;
    height: 40px;
    font-size: 22px;
    display: block;
    margin: 10px auto;
    -webkit-user-select: none;
    user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
}

.win {
    background: red;
    color: #ffffff;
}