.header-link {
  position: relative;
  left: 0.5em;
  opacity: 0;
  font-size: 0.8em;

  -webkit-transition: opacity 0.2s ease-in-out 0.1s;
  -moz-transition: opacity 0.2s ease-in-out 0.1s;
  -ms-transition: opacity 0.2s ease-in-out 0.1s;
}
h2:hover .header-link,
h3:hover .header-link,
h4:hover .header-link,
h5:hover .header-link,
h6:hover .header-link {
  opacity: 1;
}

#post-content {
	position: relative;
}
.table-of-contents.pinned {
	margin-top: 4rem;
	width: 100%;
}
.collapsible {
	width: 100%;
	background-color: #f5f5f5;
}
.collapsible-body {
	padding: 0.2rem 0.5rem;
}
.spylink {
	display: block;
	padding-left: 0.5rem !important;
}
.unit {
	padding: 0 !important;
}