.captcha_reload {
  background: url(../img/refresh-reload.png) no-repeat center center;
  background-size: cover;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 0;
  text-indent: -9000px;
  filter: invert(87%) sepia(5%) saturate(0%) hue-rotate(180deg) brightness(88%) contrast(86%);
  transition: transform 0.5s ease, filter 0.5s ease;
  margin-left: 5px;
}
.captcha_reload:active {
  transform: rotate(360deg);
}