.arrow-down {
  position: absolute;
  width: 0;
  height: 0;
  left: 3px;
  top: 6px;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 7px solid #455A64;
  &.collapse-empty {
    border-top: 7px solid #ccc;
  }
}

.arrow-right {
  position: absolute;
  width: 0;
  height: 0;
  left: 8px;
  top: 3px;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 7px solid #455A64;
}