.link-popup{position:absolute;z-index:500;max-width:420px;min-width:200px;padding:0.7rem 0.9rem;background:var(--bg);border:1px solid var(--border);border-radius:3px;box-shadow:0 3px 14px rgba(0,0,0,0.09);font-family:var(--font-sans);font-size:0.8rem;color:var(--text-muted);line-height:1.55;pointer-events:auto;opacity:0;visibility:hidden;transition:opacity 0.14s ease,visibility 0.14s ease}.link-popup.is-visible{opacity:1;visibility:visible}.popup-title{font-weight:600;color:var(--text);font-size:0.82rem;margin-bottom:0.3rem;line-height:1.35}.popup-abstract,.popup-extract{font-size:0.78rem;color:var(--text-muted);line-height:1.55}.popup-source{font-size:0.65rem;font-weight:600;font-variant-caps:all-small-caps;letter-spacing:0.07em;color:var(--text-faint);margin-bottom:0.25rem}.popup-authors{font-size:0.75rem;color:var(--text-faint);margin-bottom:0.3rem;font-style:italic}.popup-meta{font-size:0.72rem;color:var(--text-faint);margin-bottom:0.3rem;font-variant-numeric:tabular-nums}.popup-citation .csl-entry{font-family:var(--font-sans);font-size:0.8rem;color:var(--text-muted);line-height:1.6;padding-left:0;text-indent:0;margin-bottom:0}.popup-citation .csl-entry a{color:var(--text-faint);word-break:break-all}.popup-citation .ref-num{display:none}