table{
  border: solid 2px #000;
  background-color:#AAA;
  border-collapse:collapse;
}
th{
  background-color:#00F;
}
th, td{
  border: solid 1px #000;
  text-align:center;
}
tr:nth-child(2n+1){
  background-color:#66B;
}
.variant{
  font-weight:bolder;
}