div.gallery {
}

div.gallery:hover {
  opacity: 0.9;
}

div.gallery img {
  width: 100%;
  height:auto;
}

* {
    box-sizing: border-box;
}

.responsive {

    height: 100%;
}


@media only screen and (min-width: 801px) {
    .responsive {
      	float: left;
        width: 48%;
        margin: 10px 5px;
    }
}

@media only screen and (min-width: 1025px) {
  .responsive {
      padding: 0 6px;
      float: left;
      width: 19%;
  }
}

.clearfix:after {
    content: "";
    display: table;
    clear: both;
}