/* *{ */
    /* margin:0;
    padding:0;
    box-sizing:border-box; */
/* } */
body{
     font-family:Arial, Helvetica, sans-serif;
     text-align:center;
     background-color:white;
     color:black;
}
hr{
    width:500px;
    height:3px;
    background-color:black;
}
#board{
    /* border:2px solid red; */
    width:450px;
    height:450px;
    margin:0 auto;
    /* background-color:yellow; */
    display:flex;
    flex-wrap:wrap;
}
.tile{
    /* border:2px solid blue; */
    width:147px;
    height:147px;               
    font-size:150px;
    display:flex;
    justify-content:center;
    align-items:center;
}
.horizontal-line{
    border-bottom:3px solid black;
}
.vertical-line{
    border-right:3px solid black;
}
.winner{
    background-color:lightgray;
    color:red;
}