body {
  background-color: black;
}

a { color: inherit;
text-decoration: none;}

input {
  font-size: 18px;
  width:46px;
  text-align: center;
  }
table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
  }
table {
  margin: -5px;
background-color: white;
}
th {padding: 2px;
  font-size: 14px;
    text-align: center;}
td {padding: 2px;
    text-align: center;
    font-size: 16px;
  width: 48px;}

  .green { background-color: rgb(153,255,153);}
  .red {background-color: rgba(255,0,0,.25);}
  .blue {background-color: rgba(0,0,255,.25);}
  .yellow {background-color: rgb(255,255,153);}
  .plum {background-color: rgb(205,150,205);}

  .butt {
padding:2px; cursor:pointer; background:lightgrey; color:white; width:48px; height:20px; text-align:center;  font-size: 20; font-weight: bold;
}
.butt:hover {
background:black;
}

ul {
  list-style-position: outside;
  margin: 3px;
  margin-left: -10px;
}