*{
    margin: 0;
    padding: 0;
}
body{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    background: url(assite/mario-bg.jpg);
    background-size: cover;
}
#board{
    width: 540px;
    height: 540px;
    margin: 0 auto ;
    display: flex;
    flex-wrap: wrap;
    background: url(assite/soil.png);
    background-size: cover;
    border: 3px solid white;
    border-radius: 25px;
}

#board div{
    /* board = 540x540, divide into 3x3 tiles --> 180x180 per div */
    width: 180px;
    height: 180px;
    background-image: url(assite/pipe.png);
    background-size: cover;
}

#board div img{
    /* All img tags inside the tile div tags */
    width: 100px;
    height: 100px;
}
.restart{
    width: 100px;
    height: 50px;
    margin-top: 20px;
    margin-left: 220px;
    border-radius: 20px;
    background-color: purple;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}
.delete{
    width: 0;
    height: 0;
    color: transparent;
}