@keyframes _si{from{opacity:0}to{opacity:1}}

.legacy-content .lesson-header .kicker {color:var(--vibe)}.legacy-content .desc {font-size:15px;color:var(--sub);line-height:1.8}.legacy-content .tl-stats {display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.legacy-content .tl-stat {background:var(--card);border:1.5px solid var(--border);border-radius:12px;padding:12px 16px;text-align:center}.legacy-content .tl-stat .tv {font-size:28px;font-weight:800;font-family:"SF Mono",Menlo,monospace;color:var(--text);line-height:1.3;transition:color .3s}.legacy-content .tl-stat .tv.hot {color:var(--danger)}.legacy-content .tl-stat .tl {font-size:12px;color:var(--sub);font-weight:700;letter-spacing:.4px}.legacy-content .tl-track {display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:14px}.legacy-content .tl-node {background:var(--card);border:1.5px solid var(--border);border-radius:12px;padding:16px;opacity:.4;transition:all .4s ease;box-shadow:var(--shadow-card)}.legacy-content .tl-node.lit {opacity:1}.legacy-content .tl-node.lit.warn {border-color:rgba(217,119,6,.4);background:rgba(217,119,6,.04)}.legacy-content .tl-node.lit.bad {border-color:rgba(220,38,38,.4);background:rgba(220,38,38,.04)}.legacy-content .tl-node.lit.ok {border-color:rgba(13,148,136,.4);background:var(--vibe-soft)}.legacy-content .tl-day {display:inline-block;font-size:12px;font-weight:800;letter-spacing:.5px;padding:3px 10px;border-radius:999px;background:rgba(0,0,0,.06);color:var(--sub);margin-bottom:8px;font-family:"SF Mono",Menlo,monospace}.legacy-content .tl-node.lit.ok .tl-day {background:rgba(13,148,136,.14);color:var(--vibe-deep)}.legacy-content .tl-node.lit.warn .tl-day {background:rgba(217,119,6,.14);color:var(--amber)}.legacy-content .tl-node.lit.bad .tl-day {background:rgba(220,38,38,.12);color:var(--danger)}.legacy-content .tl-node h4 {font-size:15px;font-weight:800;color:var(--text);margin-bottom:5px}.legacy-content .tl-node p {font-size:13px;color:var(--sub);line-height:1.7}.legacy-content .tl-note {display:none;margin-top:10px;font-size:12.5px;font-weight:700;line-height:1.6}.legacy-content .tl-node.lit .tl-note {display:block}.legacy-content .tl-node.warn .tl-note {color:var(--amber)}.legacy-content .tl-node.bad .tl-note {color:var(--danger)}.legacy-content .tl-node.ok .tl-note {color:var(--vibe-deep)}.legacy-content .chat-wrap {background:var(--card);border:1.5px solid var(--border);border-radius:14px;overflow:hidden;margin-top:14px}.legacy-content .chat-bar {padding:10px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.02);font-size:14px;font-weight:700;color:var(--sub)}.legacy-content .chat-body {min-height:220px;max-height:420px;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.legacy-content .bub {max-width:88%;padding:10px 14px;border-radius:12px;font-size:14.5px;line-height:1.65;opacity:0;transform:translateY(8px);transition:all .35s ease;flex-shrink:0}.legacy-content .bub.show {opacity:1;transform:translateY(0)}.legacy-content .bub.ai {align-self:flex-start;background:rgba(0,0,0,.045);color:var(--text)}.legacy-content .bub.me {align-self:flex-end;background:var(--vibe);color:#fff}.legacy-content .bub.time {align-self:center;background:none;color:var(--sub);font-size:12.5px;font-weight:700;padding:2px 8px}.legacy-content .bub.warning {align-self:flex-start;background:rgba(220,38,38,.07);color:var(--danger);font-weight:600}.legacy-content .bub.ok {align-self:flex-start;background:rgba(22,163,74,.08);color:var(--success);font-weight:600}.legacy-content .reply-row {display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.legacy-content .reply-btn {padding:13px 16px;border-radius:12px;border:1.5px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s;font-family:inherit;text-align:left;width:100%;min-height:44px;box-shadow:var(--shadow-card)}.legacy-content .reply-btn:hover:not(:disabled) {border-color:rgba(0,0,0,.18)}.legacy-content .reply-btn:disabled {opacity:.45;cursor:not-allowed}.legacy-content .reply-btn .rk {display:inline-block;font-size:12px;font-weight:800;padding:2px 8px;border-radius:5px;margin-bottom:6px}.legacy-content .reply-btn.ra .rk {background:rgba(220,38,38,.1);color:var(--danger)}.legacy-content .reply-btn.rb .rk {background:var(--vibe-soft);color:var(--vibe-deep)}.legacy-content .reply-btn p {font-size:14px;color:var(--text);line-height:1.6;font-weight:600}.legacy-content .branch-verdict {display:none;margin-top:12px;padding:13px 16px;border-radius:10px;font-size:13.5px;line-height:1.75;border:1.5px solid transparent}.legacy-content .branch-verdict.show {display:block}.legacy-content .branch-verdict.bad {background:rgba(220,38,38,.05);border-color:rgba(220,38,38,.22);color:#991b1b}.legacy-content .branch-verdict.good {background:rgba(22,163,74,.06);border-color:rgba(22,163,74,.25);color:#166534}.legacy-content .ctrl-row {display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px}.legacy-content .btn {padding:11px 22px;border-radius:9px;font-size:15px;font-weight:700;border:none;cursor:pointer;font-family:inherit;transition:all .2s;min-height:44px}.legacy-content .btn-p {background:var(--vibe);color:#fff}.legacy-content .btn-p:hover {filter:brightness(1.1)}.legacy-content .btn-p:disabled {opacity:.35;cursor:not-allowed}.legacy-content .btn-r {background:rgba(0,0,0,.05);color:var(--sub);border:1px solid var(--border)}.legacy-content .hint {font-size:13px;color:var(--sub)}.legacy-content .src-note {margin-top:24px;font-size:12.5px;color:var(--sub)}.legacy-content .src-note a {color:var(--vibe-deep)}@media (max-width:768px){.legacy-content .tl-track {grid-template-columns:1fr}.legacy-content .tl-stats {grid-template-columns:1fr 1fr}.legacy-content .reply-row {grid-template-columns:1fr}}