article .post-nav {
  display: flex;
  margin: 30px 0 70px 0;
  gap: 20px;
}

/* Default for 2 links */
article .post-nav a {
  flex: 1 1 50%;
  max-width: 50%;
  box-sizing: border-box;
  border: 2px solid var(--border-color);
  padding: 10px;
  border-radius: 5px;
  text-align: center;
  white-space: normal;
  word-wrap: break-word;
  overflow-wrap: break-word;
  min-height: 50px;
}

/* Align arrows */
article .post-nav a.prev {
  text-align: left;
}

article .post-nav a.next {
  text-align: right;
}

/* When only one link present */
article .post-nav:has(a.prev):not(:has(a.next)) {
  justify-content: flex-start;
}

article .post-nav:has(a.next):not(:has(a.prev)) {
  justify-content: flex-end;
}

/* Make single link take 50% width */
article .post-nav:has(a.prev):not(:has(a.next)) a.prev,
article .post-nav:has(a.next):not(:has(a.prev)) a.next {
  flex: 0 0 50%;
  max-width: 50%;
}

/* Hover */
article .post-nav a:hover {
  text-decoration: none;
  background-color: var(--light-bg-color);
}