.day-of-week { 
  background-color: white;
  font-size: 11px;
  font-family: Courier New,Courier,Terminal;
  font-variant: normal;
  line-height: 12px;
  height: 14px;
  padding: 1px;
}

.day-of-week span {
  font-weight: bold;
  font-size: 11px;
  float: left;
  display: inline;
  cursor: pointer;
  border: solid 1px white;
}

.day-of-week span.day-of-week-on {
  color: #000000;
}

.day-of-week span.day-of-week-off {
  color: #c0c0c0;
}

.day-of-week span.active {
  border: solid 1px black;
}