.theme-counter {
  display: inline-block;
  min-width: 20px;
  padding: 0 6px;
  border: 1px solid transparent;
  border-radius: 2em;
  background: var(--color-label-bg);
  color: var(--color-label-text);
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  text-align: center;
}

/* Inside a tab GitHub's counter is 18px tall and semibold. */
.theme-counter-tab {
  padding: 2px 6px;
  font-weight: 600;
  line-height: 12px;
}