td.lectnum {
  width: 2.5cm;
  text-align: left;
}

tr.event {
  text-align: left;
  background: #d7d6d1;
}

tr.topic {
  text-align: center;
  font-weight: bold;
  color: white;
  background: #b31b1b;
}

tr.exam {
  text-align: left;
  background: #ffc000;
}

tr.break {
  text-align: left;
  background: #d7d6d1;
}