span.dayDispOK   {
  background-color:#9fc;
}
span.dayDispBad {
  background-color:#ffa3a3;
}

span.badMatch {
  background-color:#ff2;
  color:#f12;
}  
  
span.ddSig {display:inline-block;width:2em;}
span.ddSgn {display:inline-block;width:1em;}
span.ddNum {display:inline-block;width:8em;}
span.ddErr {display:inline-block;width:2em;}

.lastButton { font-weight:bold; border:3px solid red;}