div.thumb1 {
   margin-left: auto;
    margin-right: auto;
    text-align:center;
    width:100%;
  }
div.gallery {
  margin: 5px;
  border: 0px solid #ccc;
  float: left;
  width: 30%;
  overflow: auto;
  
  height:180px;
}

div.gallery:hover {
  border: 1px solid #777;
}

div.gallery img {
     margin-left: auto;
    margin-right: auto;
    text-align:center;
    height: 120px;
}

div.mainimage img {
  max-height:600px;
  max-width:98%;
   margin-left: auto;
    margin-right: auto;
}
  
  
div.desc {
  padding: 15px;
  text-align: center;
}