/* This is a relatively popular workaround to align side-by-side columns.
 * I use it for post headers. */
.post-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  column-gap: 1em;
}
.post-date {
  text-align: right;
}
.post-date a.category {
  margin-right: .5em;
}