body{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    background: url(img/mario-bg.jpg);
    background-size: auto;
}

#score{
    text-align: center;
}

#board{
    height: 540px;
    width: 540px;
    background: url(img/soil.png);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    background-size: cover;
    border: 3px solid white;
    border-radius: 30px;
}

#board div{
    width: 180px;
    height: 180px;
    background: url(img/pipe.png);
    background-size: cover;
}

#restart button{
    margin: 50px auto 0px auto;
    text-transform: uppercase;
    background: white;
    font-size: xx-large;
    font-weight: bold;
    color: brown;
}

#board div img{
    width: 100px;
    height: 100px;
    user-select: none;
    -moz-user-select: none;
    -webkit-user-drag: none;
    -webkit-user-select: none;
    -ms-user-select: none;

}