#gallery h1 {margin: 2em;}
.pswp__caption__center {text-align: center;}
#gallery figure {
  display: inline-block;
  float: left;
}
#gallery figure img {
    width: 100%;
    padding: 3px;
    border: 1px solid #ccc;
    border-radius: 5px;
}
#gallery .spacer {height: 5em;}