* {
  align-content: center;
  float: center;
}

div.gallery {
  border: 1px solid #ccc;
  margin: 5PX;
}

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

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

div.asd {
  padding: 3px;
  font-size: 20PX;
  text-align: center;
}

* {
  box-sizing: border-box;
}

.responsive {
  padding: 0;
  float: center;
  width: 25%;
}

@media only screen and (max-width: 700px) {
  .responsive {
    width: 50%;
    margin: 6px 0;
  }
}

@media only screen and (max-width: 500px) {
  .responsive {
    margin-left: 10%;

    width: 80%;
  }
}

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