.collapsiblecontainer {
  width:100%;
  border:1px solid #1E293B;
  border-radius: 0.25rem;
}
.collapsiblecontainer div {
  width:100%;
}
.collapsiblecontainer .collapsibleheader {
  background-color:#16233B;
  color: #E2E8F0;
  padding: 2px;
  cursor: pointer;
  font-weight: bold;
}
.collapsiblecontainer .collapsiblecontent {
  display: none;
  padding : 5px;
}

figcaption {
  text-align: center;
}

/* center figure content (images, GIFs) in posts */
figure {
  text-align: center;
}
figure img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}