.tab__label::after {
  position: absolute;
  top: 50%;
  transform:translateY(-25%);
  right: 0;
  height: 46px;
  content: url(../img/btn_accordion-open.svg);
}

.tab input:checked + .tab__label::after {
  transform:translateY(-25%);
  content: url(../img/btn_accordion-close.svg);
}