html{
    margin:0px 0px 0px 0px;
    box-sizing:border-box;
}

table,tr,th,td{
    border:solid 1px rgba(255,255,255,0.4);
}
tr,th,td{
    color:rgb(255, 255, 255);
    width:30px;
    height:30px;
}

table{
    background-color:black;
    text-align:center;
    margin:20px 0px 20px 0px;
}
td{
    background-color:green;
    user-select: none;
}

th{
    background-color:rgb(0, 0, 0);
}