.direct-link-button {
  border: 0;
  border-radius: 0.2rem;
  background: transparent;
  color: var(--md-default-fg-color--lighter);
  cursor: pointer;
  font: inherit;
  font-size: 0.75em;
  margin-left: 0.4rem;
  opacity: 0;
  padding: 0.1rem 0.3rem;
  transition: color 120ms ease, opacity 120ms ease, background-color 120ms ease;
}

.doc-heading:hover .direct-link-button,
.direct-link-button:focus-visible,
.direct-link-button.direct-link-copied {
  opacity: 1;
}

.direct-link-button:hover,
.direct-link-button.direct-link-copied {
  background: var(--md-code-bg-color);
  color: var(--md-accent-fg-color);
}