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var(--paper))}.topic-link.active{background:var(--accent-soft);color:var(--accent);font-weight:600;text-decoration:none}.topic-link.active em{color:var(--accent)}.topic-link.active .topic-check,.topic-link.active .topic-check.done{background:var(--accent);color:#fff}.topic-link.done:not(.active),.topic-link.done:not(.active) .topic-link-text{color:var(--ink)}.sidebar-back-btn{border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;border-radius:999px;align-self:flex-start;align-items:center;gap:6px;padding:8px 12px 8px 8px;font-size:.82rem;font-weight:600;transition:background .15s,border-color .15s,color .15s;display:inline-flex}.sidebar-back-btn svg{width:16px;height:16px}.sidebar-back-btn:hover{background:var(--accent-soft);color:var(--accent);border-color:#c8d0f8}.sidebar-topic-meta{border-bottom:1px solid var(--line);flex-direction:column;gap:10px;padding:4px 4px 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