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

.legacy-content .lesson-header .kicker {color:var(--vibe)}.legacy-content .desc {font-size:16px;color:var(--sub);line-height:1.8}.legacy-content .pg-grid {display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}.legacy-content .pg-panel {background:var(--card);border:1.5px solid var(--border);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}.legacy-content .pg-hd {padding:10px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.02);font-size:13px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--sub)}.legacy-content .pg-preview {flex:1;min-height:190px;display:flex;align-items:center;justify-content:center;background:
  repeating-conic-gradient(rgba(0,0,0,.025) 0% 25%, transparent 0% 50%) 0 0 / 22px 22px}.legacy-content #pgBtn {border:none;cursor:pointer;font-family:inherit;font-weight:700;color:#fff;transition:all .2s;box-shadow:0 4px 14px rgba(0,0,0,.14)}.legacy-content #pgBtn:hover {filter:brightness(1.08)}.legacy-content .pg-css {padding:12px 16px;background:var(--surface-soft);color:var(--muted);font-family:"SF Mono","Fira Code",Menlo,monospace;font-size:12.5px;line-height:1.7;white-space:pre-wrap;word-break:break-all}.legacy-content .pg-controls {padding:16px;display:flex;flex-direction:column;gap:16px}.legacy-content .pg-ctl label {display:block;font-size:14px;font-weight:800;color:var(--text);margin-bottom:8px}.legacy-content .pg-ctl label span {font-weight:600;color:var(--vibe);font-family:"SF Mono",Menlo,monospace;font-size:13px}.legacy-content .pg-ctl input[type=range] {width:100%;accent-color:var(--vibe);height:44px;cursor:pointer}.legacy-content .swatch-row {display:flex;gap:10px;flex-wrap:wrap}.legacy-content .swatch {width:44px;height:44px;border-radius:12px;border:2.5px solid transparent;cursor:pointer;transition:all .15s;padding:0}.legacy-content .swatch.active {border-color:var(--text);transform:scale(1.08)}.legacy-content .seg-row {display:flex;gap:8px;flex-wrap:wrap}.legacy-content .seg {padding:10px 20px;border-radius:9px;border:1.5px solid var(--border);background:var(--card);font-size:14px;font-weight:700;color:var(--sub);cursor:pointer;font-family:inherit;transition:all .15s;min-height:44px}.legacy-content .seg.active {border-color:var(--vibe);background:rgba(13,148,136,.07);color:var(--vibe)}.legacy-content .iso-grid {display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}.legacy-content .iso-card {border-radius:14px;padding:17px 20px;border:1.5px solid var(--border);background:var(--card)}.legacy-content .iso-card.good {border-color:rgba(13,148,136,.35);background:rgba(13,148,136,.04)}.legacy-content .iso-card.bad {border-color:rgba(220,38,38,.28);background:rgba(220,38,38,.03)}.legacy-content .iso-card h3 {font-size:16px;margin-bottom:6px}.legacy-content .iso-card.good h3 {color:var(--vibe)}.legacy-content .iso-card.bad h3 {color:var(--danger)}.legacy-content .iso-card p {font-size:14px;color:var(--sub);line-height:1.75}.legacy-content .quiz-card {background:var(--card);border:1.5px solid var(--border);border-radius:14px;padding:18px 22px;margin-top:14px}.legacy-content .quiz-q {font-size:16px;font-weight:800;color:var(--text);line-height:1.6;margin-bottom:12px}.legacy-content .quiz-q .q-tag {display:inline-block;font-size:12px;font-weight:800;letter-spacing:.5px;color:var(--vibe);background:rgba(13,148,136,.1);border-radius:6px;padding:2px 9px;margin-right:8px;vertical-align:2px}.legacy-content .quiz-opts {display:flex;flex-direction:column;gap:8px}.legacy-content .q-opt {text-align:left;padding:12px 16px;border-radius:10px;border:1.5px solid var(--border);background:var(--card);font-size:14.5px;color:var(--text);cursor:pointer;font-family:inherit;transition:all .15s;line-height:1.6;min-height:44px;width:100%}.legacy-content .q-opt:hover {border-color:rgba(0,0,0,.2)}.legacy-content .q-opt.right {border-color:rgba(22,163,74,.5);background:rgba(22,163,74,.07);color:var(--success);font-weight:700}.legacy-content .q-opt.wrong {border-color:rgba(220,38,38,.4);background:rgba(220,38,38,.05);color:var(--danger)}.legacy-content .q-opt:disabled {cursor:default}.legacy-content .quiz-fb {margin-top:12px;border-radius:10px;padding:13px 16px;font-size:14px;line-height:1.7;display:none}.legacy-content .quiz-fb.on {display:block}.legacy-content .quiz-fb.fb-right {background:rgba(22,163,74,.06);border:1.5px solid rgba(22,163,74,.3);color:var(--text)}.legacy-content .quiz-fb.fb-wrong {background:rgba(220,38,38,.05);border:1.5px solid rgba(220,38,38,.28);color:var(--text)}.legacy-content .quiz-fb b.ok {color:var(--success)}.legacy-content .quiz-fb b.no {color:var(--danger)}.legacy-content .rule-grid {display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin-top:12px}.legacy-content .rule-grid .l-card h3 {font-size:16px;margin-bottom:4px}.legacy-content .rule-grid .l-card p {font-size:14px;color:var(--sub);line-height:1.7}.legacy-content .rule-tag {display:inline-block;font-size:12px;font-weight:800;letter-spacing:.5px;color:var(--vibe);background:rgba(13,148,136,.1);border-radius:6px;padding:3px 10px;margin-bottom:8px}.legacy-content code {color:var(--vibe-deep);background:rgba(13,148,136,.08)}.legacy-content .vibe-callout {background:rgba(13,148,136,.05);border:1.5px solid rgba(13,148,136,.25);border-radius:14px;padding:18px 22px}.legacy-content .vibe-callout b {color:var(--vibe)}.legacy-content .src-note {margin-top:28px;font-size:13px;color:var(--sub)}.legacy-content .src-note a {color:var(--vibe-deep)}.legacy-content .ctrl-hint {font-size:13px;color:var(--sub);margin-top:8px}@media (max-width:768px){.legacy-content .pg-grid, .legacy-content .iso-grid, .legacy-content .rule-grid {grid-template-columns:1fr}}

.legacy-content .xa-tldr {margin:18px 0 4px;padding:14px 18px;background:rgba(0,102,255,0.04);border:1px solid rgba(0,102,255,0.16);border-radius:10px}.legacy-content .xa-tldr .xa-tldr-tag {display:block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--accent,#0066ff);margin-bottom:6px}.legacy-content .xa-tldr p {margin:0;font-size:15px;line-height:1.8;color:var(--text,#1f2937)}