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

.legacy-content .lesson-header .kicker {color:var(--vibe)}.legacy-content code {color:var(--vibe-deep)}.legacy-content .l-callout {background:rgba(13,148,136,.05);border-color:rgba(13,148,136,.25)}.legacy-content .l-callout b {color:var(--vibe-deep)}.legacy-content .desc {font-size:16px;color:var(--sub);line-height:1.8}.legacy-content .board-list {display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:12px}.legacy-content .board-btn {display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px 10px;border-radius:12px;border:1.5px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s;font-family:inherit;min-height:44px;box-shadow:var(--shadow-card)}.legacy-content .board-btn:hover {border-color:rgba(0,0,0,.15)}.legacy-content .board-btn.active {border-color:var(--vibe);background:rgba(13,148,136,.05);box-shadow:0 2px 12px rgba(0,0,0,.07)}.legacy-content .board-icon {font-size:26px;line-height:1}.legacy-content .board-btn h4 {font-size:14.5px;font-weight:800;color:var(--text)}.legacy-content .board-btn.active h4 {color:var(--vibe-deep)}.legacy-content .board-btn small {font-size:12px;color:var(--sub)}.legacy-content .board-detail {margin-top:14px;background:var(--card);border:1.5px solid rgba(13,148,136,.3);border-radius:14px;padding:18px 20px}.legacy-content .bd-title {font-size:16px;font-weight:800;color:var(--vibe-deep);margin-bottom:4px}.legacy-content .bd-sub {font-size:13.5px;color:var(--sub);margin-bottom:12px}.legacy-content .chap-item {display:flex;gap:12px;align-items:flex-start;padding:11px 0}.legacy-content .chap-item + .chap-item {box-shadow:inset 0 1px 0 var(--border)}.legacy-content .chap-num {flex-shrink:0;font-size:12px;font-weight:800;color:var(--vibe-deep);background:rgba(13,148,136,.1);border-radius:7px;padding:4px 10px;white-space:nowrap;margin-top:2px}.legacy-content .chap-body {flex:1;min-width:0}.legacy-content .chap-body b {font-size:15px;color:var(--text)}.legacy-content .chap-body p {font-size:13.5px;color:var(--sub);margin-top:2px;line-height:1.65}.legacy-content .chap-lesson {flex-shrink:0;font-size:12px;font-weight:700;color:var(--sub);background:rgba(0,0,0,.05);border-radius:999px;padding:4px 11px;white-space:nowrap;margin-top:2px}.legacy-content .board-base {margin-top:14px;text-align:center;font-size:14px;color:var(--sub);background:rgba(13,148,136,.05);border:1.5px solid rgba(13,148,136,.2);border-radius:12px;padding:13px 16px}.legacy-content .board-base b {color:var(--vibe-deep)}.legacy-content .step3 {display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}.legacy-content .step3 .l-card h3 {font-size:15.5px;font-weight:800;margin-bottom:6px}.legacy-content .step3 .l-card h3 span {color:var(--vibe-deep);margin-right:6px}.legacy-content .step3 .l-card p {font-size:14px;color:var(--sub)}.legacy-content .wiz-wrap {background:var(--card);border:1.5px solid var(--border);border-radius:14px;overflow:hidden;margin-top:12px}.legacy-content .wiz-bar {padding:10px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.02);display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.legacy-content .wiz-bar b {font-size:14px;color:var(--sub)}.legacy-content .wiz-step-badge {font-size:13px;font-weight:800;color:var(--vibe-deep)}.legacy-content .wiz-body {padding:20px}.legacy-content .wiz-q {font-size:17px;font-weight:800;color:var(--text);margin-bottom:4px}.legacy-content .wiz-q .wq-tag {display:inline-block;font-size:12px;font-weight:800;color:#fff;background:var(--vibe);border-radius:6px;padding:2px 9px;margin-right:8px;vertical-align:2px}.legacy-content .wiz-note {font-size:13.5px;color:var(--sub);margin-bottom:14px}.legacy-content .opt-list {display:grid;grid-template-columns:1fr 1fr;gap:10px}.legacy-content .opt-btn {padding:13px 16px;border-radius:11px;border:1.5px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s;font-family:inherit;text-align:left;font-size:15px;font-weight:700;color:var(--text);min-height:44px}.legacy-content .opt-btn:hover {border-color:var(--vibe);background:rgba(13,148,136,.04)}.legacy-content .wiz-slider-row {display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:6px}.legacy-content .wiz-slider-row input[type=range] {flex:1;min-width:180px;accent-color:var(--vibe);height:44px;cursor:pointer}.legacy-content .wiz-val {font-size:16px;font-weight:800;color:var(--vibe-deep);background:rgba(13,148,136,.1);padding:7px 16px;border-radius:9px;min-width:80px;text-align:center}.legacy-content .wiz-progress {display:flex;gap:6px;margin-bottom:16px}.legacy-content .wiz-dot {flex:1;height:5px;border-radius:99px;background:rgba(0,0,0,.07);transition:background .3s}.legacy-content .wiz-dot.done {background:var(--vibe)}.legacy-content .result-item {display:flex;gap:12px;align-items:flex-start;padding:13px 0}.legacy-content .result-item + .result-item {box-shadow:inset 0 1px 0 var(--border)}.legacy-content .res-badge {flex-shrink:0;width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;color:#fff}.legacy-content .res-badge.del {background:var(--danger)}.legacy-content .res-badge.swap {background:var(--amber)}.legacy-content .res-badge.tune {background:var(--cyan)}.legacy-content .res-badge.add {background:var(--vibe)}.legacy-content .res-body b {font-size:15px;color:var(--text)}.legacy-content .res-body p {font-size:14px;color:var(--sub);margin-top:2px;line-height:1.7}.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(1.08)}.legacy-content .btn-r {background:rgba(0,0,0,0.05);color:var(--sub);border:1px solid var(--border)}.legacy-content .hint {font-size:13px;color:var(--sub)}.legacy-content .review-grid {display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-top:12px}.legacy-content .rv-card {padding:14px 16px;border-radius:12px;border:1.5px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s;font-family:inherit;text-align:left;min-height:44px;box-shadow:var(--shadow-card)}.legacy-content .rv-card:hover {border-color:rgba(0,0,0,.15)}.legacy-content .rv-card.open {border-color:var(--vibe);background:rgba(13,148,136,.04)}.legacy-content .rv-num {font-size:12px;font-weight:800;color:var(--vibe-deep);letter-spacing:.5px}.legacy-content .rv-title {font-size:15px;font-weight:800;color:var(--text);margin-top:2px}.legacy-content .rv-back {font-size:13.5px;color:var(--sub);line-height:1.65;margin-top:8px;display:none}.legacy-content .rv-card.open .rv-back {display:block}.legacy-content .rv-flip-hint {font-size:12px;color:var(--sub);margin-top:8px}.legacy-content .rv-card.open .rv-flip-hint {display:none}.legacy-content .src-note {margin-top:24px;font-size:13px;color:var(--sub)}.legacy-content .src-note a {color:var(--vibe-deep)}.legacy-content .repo-cta {display:flex;align-items:center;gap:18px;background:linear-gradient(135deg,rgba(13,148,136,.06),var(--card));border:1.5px solid rgba(13,148,136,.35);border-radius:14px;padding:20px 22px;flex-wrap:wrap}.legacy-content .repo-cta .repo-ic {width:42px;height:42px;flex-shrink:0;color:var(--text)}.legacy-content .repo-cta .repo-txt {flex:1;min-width:220px}.legacy-content .repo-cta h3 {font-size:16px;font-weight:800;margin-bottom:4px}.legacy-content .repo-cta h3 span {color:var(--vibe-deep)}.legacy-content .repo-cta .repo-txt p {font-size:13.5px;color:var(--sub);line-height:1.7}.legacy-content .repo-btn {display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--vibe);color:#fff;font-size:15px;font-weight:700;padding:12px 24px;border-radius:9px;text-decoration:none;min-height:44px;transition:filter .2s,transform .15s;flex-shrink:0}.legacy-content .repo-btn:hover {filter:brightness(1.08);transform:translateY(-1px)}@media(max-width:768px){.legacy-content .repo-cta {flex-direction:column;align-items:flex-start}.legacy-content .repo-btn {width:100%}}@media (max-width:768px){.legacy-content .board-list {grid-template-columns:1fr 1fr}.legacy-content .step3 {grid-template-columns:1fr}.legacy-content .opt-list {grid-template-columns:1fr}.legacy-content .review-grid {grid-template-columns:1fr}.legacy-content .chap-lesson {display:none}}

.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)}