.site-abbreviation {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-style: wavy;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  cursor: help;
}

.site-abbreviation:focus-visible {
  border-radius: 2px;
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.abbreviation-tooltip {
  position: fixed;
  z-index: 3000;
  width: max-content;
  max-width: min(360px, calc(100vw - 24px));
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
  pointer-events: none;
}

.abbreviation-tooltip strong {
  font-weight: 750;
}

@media (prefers-reduced-motion: no-preference) {
  .abbreviation-tooltip { transition: opacity 100ms ease; }
}