icon-plus

.icon-plus:not(.ico) { // legacy css fix
  position: relative;
  display: block;
  flex: 1 1 auto;
  width: 100%;
  height: 0;
  padding-top: 100%;
  cursor: pointer;
}

.icon-plus:not(.ico):before { // legacy css fix
  content: initial;
}

.icon-plus__inner {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.icon-plus__inner:before,
.icon-plus__inner:after {
  transform: translateY(-50%);
  position: absolute;
  top: 50%;
  left: 0;
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentcolor;
  content: '';
}

.icon-plus__inner:before {
  transform: translateY(-50%) rotate(90deg);
}