galerija.css

.galerija{
    display:none;
    margin:0 auto;
    text-align: center;
}

/* .row{
    width: 98%;
    height: 20vh;
    margin: 107px auto;
    text-align: center;
}*/

.row-block{
    width: 22%;
    height: auto;
    display: inline-block;
    transition:0.3s;
}

.row-block img{
  width:100%;
  height: auto;
}

.showImg {
    height: 100vh;
    width: 100%;
    padding: 0 5rem;
    background-color: rgba(0,0,0,0.8);
    display: block;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s linear;
  }

  .showOverlay {
    visibility: visible;
    opacity:1;
  }

  #closeOverlay{
    position: absolute;
    top: 40px;
    right: 200px;
    width: 50px;
    height: 50px;
    background-color: white;
    color: black;
    text-align: center;
    line-height: 52px;
    opacity: 1;
    transition: 0.2s;
    z-index: 1;
  }

  #closeOverlay:hover{
    background-color:darkred;
    transition:0.2s;
    color:white;
    border-radius:30px;
  }

  .imgContainer{
    width: 100%;
    height: 100vh;
    left: 0;
    right: 0;
    position: fixed;
    margin: auto;
    text-align: center;
  }

  .imgContainer img{
    max-width: 100%;
    max-height:100%;
}