.portfolio-filter {
  margin-bottom: 40px;
  text-align: center;
}

.portfolio-filter button {
  font-size: 18px;
  border: 1px solid #044561;
  border-radius: 5px;
  text-align: center;
  color: #044561;
  margin-bottom: 30px;
}

.portfolio-filter button:hover{
  font-size: 18px;
  border: 1px solid #044561;
  border-radius: 5px;
  text-align: center;
  color: #ffffff;
  background-color: #044561;
}

.portfolio-filter button.active {
  background-color: #42B32F;
  color: white;
}

.portfolio-block {
  position: relative;
  margin-bottom: 30px;
  min-width: 100%;
  min-height: 263.53px;
  height: 263.53px;
  overflow: hidden;
}

.portfolio-block img {
  height: 100%;
  max-width: unset;
}

.portfolio-block:before {
  transition: all 0.3s ease-in-out;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  position: absolute;
  content: '';
}

.portfolio-block:hover:before {
  opacity: 1;
}

.portfolio-block:hover .caption h4 {
  top: 45%;
}

.portfolio-block:hover .caption {
  opacity: 1;
  top: 55%;
}

.portfolio-block .caption {
  position: absolute;
  top: 50%;
  left: 50%;
  opacity: 0;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  z-index: 9;
  transition: all 0.3s ease-in-out;
  text-align: center;
}

.portfolio-block .caption h4 {
  font-size: 16px;
}

.portfolio-block .caption h4 a {
  color: #fff;
}

.portfolio-block .caption .search-icon {
  background: #f6b93b;
  color: #fff;
  display: inline-block;
  padding: 4px 13px;
  font-size: 15px;
  border-radius: 30px;
}