.heading-anchor {
  position: relative;
  display: inline-block;
  margin-left: calc(-1 * var(--anchor-space, 32px));
  padding-left: var(--anchor-space, 32px);
}

.anchor-icon {
  position: absolute;
  top: calc(var(--anchor-line-height, 1em) / 2);
  left: 0;
  display: inline-flex;
  width: var(--anchor-size, 24px);
  height: var(--anchor-size, 24px);
  align-items: center;
  justify-content: center;
  padding: 4px;
  border: 1px solid var(--header-bg-border);
  border-radius: var(--anchor-radius, 8px);
  background-color: var(--header-bg);
  color: var(--nav-item-color);
  opacity: 0;
  transform: translateY(-50%);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition:
    opacity 0.24s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.24s cubic-bezier(0.4, 0, 0.2, 1),
    background-color var(--theme-transition),
    border-color var(--theme-transition),
    color var(--theme-transition);
}

.anchor-icon svg {
  display: block;
  width: var(--anchor-glyph-size, 20px);
  height: var(--anchor-glyph-size, 20px);
}

.heading-anchor:hover .anchor-icon,
.anchor-icon:focus-visible {
  opacity: 1;
  transform: translateY(-50%) scale(1.05);
}

.anchor-icon:hover {
  background-color: var(--dropdown-item);
  color: var(--heading-color);
}

.anchor-icon:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

.copy-notification {
  position: fixed;
  bottom: 25px;
  left: 50%;
  z-index: 10000;
  padding: 10px 14px;
  border: 1px solid var(--header-bg-border);
  border-radius: 14px;
  background-color: var(--header-bg);
  color: var(--text-color);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
  opacity: 0;
  filter: blur(18px);
  pointer-events: none;
  transform: translate(-50%, 2px);
  backdrop-filter: blur(20px);
  transition:
    opacity 0.28s ease,
    filter 0.32s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.28s ease,
    background-color var(--theme-transition),
    border-color var(--theme-transition),
    color var(--theme-transition);
}

.copy-notification.show {
  opacity: 1;
  filter: blur(0);
  transform: translate(-50%, 0);
}

.anchor-copy-buffer {
  position: fixed;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 768px) {
  .heading-anchor {
    margin-left: 0;
    padding-left: 0;
    -webkit-tap-highlight-color: transparent;
  }

  .heading-anchor[role="button"] {
    cursor: pointer;
  }

  .heading-anchor[role="button"]:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: 8px;
  }

  .anchor-icon {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {

  .anchor-icon,
  .copy-notification {
    transition: none;
  }
}