.gallery_sec {
  width: 100%;
  padding: 80px 0;
}


.gallery_sec img {
  width: 100%;
  margin-bottom: 30px;
  height: 250px;
}

.gallery_sec a {
  position: relative;
  transition: 0.3s ease-in-out;
  -webkit-transition: 0.3s ease-in-out;
  -moz-transition: 0.3s ease-in-out;
  -ms-transition: 0.3s ease-in-out;
  -o-transition: 0.3s ease-in-out;
}


.gallery_sec a::before {
  position: absolute;
  content: "";
  width: 30px;
  height: 30px;
  background: none;
  background-size: contain;
  background-repeat: no-repeat;
  top: 45%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.gallery_sec img {
  transition: 0.3s ease-in-out;
  -webkit-transition: 0.3s ease-in-out;
  -moz-transition: 0.3s ease-in-out;
  -ms-transition: 0.3s ease-in-out;
  -o-transition: 0.3s ease-in-out;
}

.gallery_sec a:hover img {
  position: relative;
  width: 100%;
}

.gallery_sec a:hover img {
  opacity: 0.2;
}

.gallery_sec a:hover::before {
  position: absolute;
  content: "";
  width: 50px;
  height: 50px;
  background: url(https://i.ibb.co/3fMkjjF/Resize.png);
  background-size: contain;
  background-repeat: no-repeat;
  z-index: 99;
}