nycJSorg/angular-presentation

.wrapper {
  display: flex;
  flex-wrap: wrap;
}

.rule {
  margin-left: 10px;
  margin-top: 10px;
}

.cell {
  width: 20px;
  height: 20px;
  border: 1px #ddd solid;
}

.after {
  margin-left: 20px;
}

.active {
  background: lime;
}