.minimizable {
  cursor: pointer;
  position: relative;
}
.minimizable:after {
  content: "";
  position: absolute;
  right: 1em;
  border: 0.6em solid;
  border-right-color: transparent;
  border-left-color: transparent;
  border-top-color: transparent;
  border-bottom-color: initial;
  top: 50%;
  margin-top: -0.8em;
}
.minimizable.minimized:after {
  border-top-color: initial;
  border-bottom-color: transparent;
  margin-top: -0.3em;
}
