.single-line{
  overflow: hidden;
  text-overflow:ellipsis;
  white-space: nowrap;
}
.courses{
  height: 26vh;
}
.course{
  padding: 4px 12px;
}
.course-name{
  padding-left: 6px;
}
.empty-tip{
  text-align: center;
  color: dimgray;
  font-size: 15px;
  padding-top: 10vh;
}
.operations{
  text-align: center;
  margin: -28px 0 -20px 0;
}
.operation{
  width: 120px!important;
  margin: 0 8px!important;
  display: inline-block!important;
}
.option{
  transform: scale(0.6);
}