h1 {  font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 16pt; color: #FF0000; font-weight: 300}
.Beispiel {  font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 14pt; color: #990000}
.Regeln {  color: #009999}
.GeometrischeDeutung {  font-family: Arial, Helvetica, sans-serif; font-size: 14pt; color: #33CC66}