/* Heading link (chain icon) + "Copied!" feedback */
article .heading-anchor {
  position: relative; /* to scope absolute children if needed */
}

/* The icon/button that sits next to the heading */
.heading-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  margin-left: .45rem;
  margin-right: -0.25rem; /* visually tuck a bit */
  color: currentColor;
  text-decoration: none;
  opacity: 0;
  transform: translateY(-1px); /* small vertical align tweak */
  transition: opacity 160ms ease;
  vertical-align: middle;
}

/* Reveal the icon when heading is hovered, focused or the link itself is focused */
article h2:hover .heading-link,
article h3:hover .heading-link,
article h4:hover .heading-link,
article h5:hover .heading-link,
article h6:hover .heading-link,
.heading-link:focus:not(span) {
  opacity: 0.5;
}
.heading-link:focus span {
  opacity: 1;
}

/* Make it keyboard focusable and visible */
.heading-link:focus {
  outline: 2px solid Highlight;
  outline-offset: 2px;
}

/* Slight hover effect */
.heading-link:hover svg,
.heading-link:focus svg {
  transform: translateY(-1px) scale(1.02);
  transition: transform 120ms;
}

/* Tooltip / "Copied!" bubble */
.heading-link .copy-feedback {
  position: absolute;
  top: -2.2rem;
  left: 50%;
  transform: translateX(-50%);
  background: #111;
  color: #fff;
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  border-radius: 0.35rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease, transform 150ms ease;
  transform-origin: bottom center;
  z-index: 10;
}

/* show feedback */
.heading-link.copied .copy-feedback {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* small caret pointing down (optional) */
.heading-link .copy-feedback::after{
  content: "";
  position:absolute;
  left: 50%;
  bottom: -5px;
  transform: translateX(-50%);
  border-width: 5px 5px 0 5px;
  border-style: solid;
  border-color: #111 transparent transparent transparent;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .heading-link, .heading-link .copy-feedback {
    transition: none !important;
  }
}

/* for touch screens always show */
@media (hover: none) and (pointer: coarse) {
  .heading-link span a { opacity: 0.5; }
}