.cite-ref a[data-cite-popover] {
  cursor: pointer;
}
.cite-ref a[data-cite-popover][aria-expanded="true"] {
  background: var(--accent);
  color: #fff;
}
.citation-popover {
  position: fixed;
  z-index: 40;
  width: min(420px, calc(100vw - 24px));
  max-height: min(50vh, 360px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
  padding: 14px 15px 15px;
  font-size: 13px;
  line-height: 1.55;
}
.citation-popover[hidden] { display: none; }
.citation-popover::before {
  content: "";
  position: fixed;
  width: 12px;
  height: 12px;
  transform: rotate(45deg);
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
  left: calc(var(--arrow-x, 50%) - 6px);
  display: none;
}
.citation-popover-close {
  position: sticky;
  top: 0;
  float: right;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.citation-popover-close:hover,
.citation-popover-close:focus {
  background: var(--accent-soft);
  color: var(--accent);
  outline: 0;
}
.citation-popover-number {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
  margin-bottom: 4px;
}
.citation-popover strong {
  display: block;
  padding-right: 32px;
  font-size: 14px;
  line-height: 1.35;
}
.citation-popover-source {
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}
.citation-popover blockquote {
  margin: 10px 0 0;
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--ink);
}
.citation-popover-empty {
  margin: 10px 0 0;
  color: var(--muted);
}
@media (max-width: 720px) {
  .citation-popover {
    left: 12px !important;
    right: 12px;
    width: auto;
    max-height: 45vh;
  }
}