#columns {
  column-width: 320px;
  column-gap: 15px;
  width: 90%;
  max-width: 1100px;
  margin: 50px auto;
}

div#columns figure {
  background: #fefefe;
  border: 2px solid #fcfcfc;
  box-shadow: 0 1px 2px rgba(34, 25, 25, 0.4);
  margin: 0 2px 15px;
  padding: 15px;
  padding-bottom: 10px;
  transition: opacity .5s ease-in-out;
  display: inline-block;
  column-break-inside: avoid;
}

div#columns figure img {
  width: 100%; height: auto;
  border-bottom: 1px solid #ccc;
  padding-bottom: 15px;
  margin-bottom: 5px;
}

div#columns figure figcaption {
  font-size: .9rem;
  color: #444;
  line-height: 1.5;
}

div#columns:hover figure:not(:hover) {
  opacity: 0.5;
}

@media screen and (max-width: 750px) { 
  #columns { column-gap: 0px; }
  #columns figure { width: 100%; }
}