.content__btn-register {
  z-index: 1;
  position: relative;
  display: inline-block;
  font-size: 30px;
  line-height: 1;
  color: #FFF!important;
  padding: 10px 20px 10px 60px;
  border-radius: 50px;
  background: #02a1b4;
  background-size: auto;
  border: 2px solid #02a1b4;
  overflow: hidden;
  -webkit-transition: color 0.4s ease-in-out;
  transition: color 0.4s ease-in-out;
}

.content__btn-register:hover {
  color: #02a1b4!important;
  text-decoration: none;
}

.content__btn-register:hover::after {
  content: '';
  background: url(../enewsletter03/img/icon_check-ov.png) no-repeat center center;
  width: 30px;
  height: 30px;
  position: absolute;
  left: 15px;
  top: 10px;
}

.content__btn-register::after {
  content: '';
  background: url(../enewsletter03/img/icon_check.png) no-repeat center center;
  width: 30px;
  height: 30px;
  position: absolute;
  left: 15px;
  top: 10px;
}

.content__btn-register::before {
  content: "";
  z-index: -1;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  color: #02a1b4!important;
  background-color: #FFF;
  -webkit-transform-origin: center;
          transform-origin: center;
  -webkit-transform: translate3d(-50%, -50%, 0) scale3d(0, 0, 0);
          transform: translate3d(-50%, -50%, 0) scale3d(0, 0, 0);
  -webkit-transition: -webkit-transform 0.45s ease-in-out;
  transition: -webkit-transform 0.45s ease-in-out;
  transition: transform 0.45s ease-in-out;
  transition: transform 0.45s ease-in-out, -webkit-transform 0.45s ease-in-out;
}

.content__btn-register:hover::before {
  -webkit-transform: translate3d(-50%, -50%, 0) scale3d(15, 15, 15);
          transform: translate3d(-50%, -50%, 0) scale3d(15, 15, 15);
}