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

.legacy-content .lesson-header .kicker {color:var(--ds)}.legacy-content .l-callout b {color:var(--ds)}.legacy-content .hunt-wrap {display:grid;grid-template-columns:1fr 1fr;gap:14px}.legacy-content .hunt-box {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column}.legacy-content .hunt-head {padding:13px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.015)}.legacy-content .hunt-head h4 {font-size:14.5px;font-weight:800;color:var(--text)}.legacy-content .hunt-head p {font-size:12px;color:var(--sub);margin-top:3px}.legacy-content .hunt-stage {padding:16px;flex:1}.legacy-content .hunt-grid {display:grid;grid-template-columns:repeat(6,1fr);gap:7px}.legacy-content .hunt-cell {aspect-ratio:1;border-radius:9px;background:rgba(0,0,0,.045);display:flex;align-items:center;justify-content:center;font-size:17px;transition:background .12s,transform .12s,box-shadow .12s;position:relative}.legacy-content .hunt-cell.checking {background:rgba(220,38,38,.16);transform:scale(1.12);box-shadow:0 0 0 2px rgba(220,38,38,.35)}.legacy-content .hunt-cell.found {background:rgba(22,163,74,.18);transform:scale(1.12);box-shadow:0 0 0 2px rgba(22,163,74,.5)}.legacy-content .hunt-cell.dim {opacity:.28}.legacy-content .hunt-shelf {display:flex;flex-direction:column;gap:7px}.legacy-content .hunt-row {display:flex;align-items:center;gap:8px}.legacy-content .hunt-row-label {width:52px;font-size:11.5px;font-weight:800;color:var(--sub);text-align:right;flex-shrink:0}.legacy-content .hunt-row-cells {display:grid;grid-template-columns:repeat(6,1fr);gap:7px;flex:1}.legacy-content .hunt-row.lit .hunt-row-label {color:var(--ds)}.legacy-content .hunt-foot {padding:12px 16px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px}.legacy-content .hunt-count {font-size:12.5px;font-weight:700;color:var(--sub)}.legacy-content .hunt-count b {font-size:19px;font-weight:900;color:var(--text);font-variant-numeric:tabular-nums;margin-right:2px}.legacy-content .hunt-count.done b {color:var(--success)}.legacy-content .hunt-controls {display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px}.legacy-content .btn-ds {background:var(--ds);color:#fff;border:none;padding:10px 26px;border-radius:999px;font-size:14px;font-weight:800;cursor:pointer;font-family:inherit;transition:filter .15s,transform .15s}.legacy-content .btn-ds:hover:not(:disabled) {filter:brightness(1.08);transform:translateY(-1px)}.legacy-content .btn-ds:disabled {background:#c4c8cf;cursor:not-allowed}.legacy-content .hunt-status {font-size:12.5px;color:var(--sub);font-weight:600}.legacy-content .hunt-verdict {margin-top:14px;padding:14px 18px;background:var(--ds-soft);border:1.5px dashed var(--ds-line);border-radius:var(--radius-sm);font-size:13.5px;line-height:1.8;color:var(--sub);opacity:0;transform:translateY(6px);transition:opacity .35s,transform .35s}.legacy-content .hunt-verdict.show {opacity:1;transform:translateY(0)}.legacy-content .hunt-verdict b {color:var(--ds-deep)}.legacy-content .roster-box {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:20px 24px}.legacy-content .roster-slider-row {display:flex;align-items:center;gap:14px;margin-bottom:18px;flex-wrap:wrap}.legacy-content .roster-slider-row label {font-size:13.5px;font-weight:800;color:var(--text);flex-shrink:0}.legacy-content .roster-slider-row input[type=range] {flex:1;min-width:160px;accent-color:var(--ds)}.legacy-content .roster-n {font-size:15px;font-weight:900;color:var(--ds);font-variant-numeric:tabular-nums;min-width:88px}.legacy-content .roster-grid {display:grid;grid-template-columns:1fr 1fr;gap:14px}.legacy-content .roster-card {border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px}.legacy-content .roster-card h5 {font-size:13.5px;font-weight:800;color:var(--text);margin-bottom:4px;display:flex;align-items:center;gap:8px}.legacy-content .roster-badge {font-size:10.5px;font-weight:800;padding:2px 9px;border-radius:99px}.legacy-content .roster-card.slow .roster-badge {background:rgba(220,38,38,.1);color:var(--danger)}.legacy-content .roster-card.fast .roster-badge {background:rgba(22,163,74,.1);color:var(--success)}.legacy-content .roster-code {font-family:"SF Mono","Fira Code",Menlo,monospace;font-size:12px;line-height:1.7;color:var(--sub);background:rgba(0,0,0,.035);border-radius:8px;padding:10px 13px;margin:10px 0;white-space:pre;overflow-x:auto}.legacy-content .roster-code .hl {color:var(--ds-deep);font-weight:700}.legacy-content .roster-time {display:flex;align-items:baseline;gap:6px}.legacy-content .roster-time .rt-label {font-size:11.5px;font-weight:700;color:var(--sub)}.legacy-content .roster-time .rt-val {font-size:21px;font-weight:900;font-variant-numeric:tabular-nums;transition:color .2s}.legacy-content .roster-card.slow .rt-val {color:var(--danger)}.legacy-content .roster-card.fast .rt-val {color:var(--success)}.legacy-content .roster-bar {height:10px;border-radius:6px;background:rgba(0,0,0,.05);overflow:hidden;margin-top:8px}.legacy-content .roster-fill {height:100%;border-radius:6px;transition:width .3s cubic-bezier(.25,1,.5,1)}.legacy-content .roster-card.slow .roster-fill {background:var(--danger)}.legacy-content .roster-card.fast .roster-fill {background:var(--success)}.legacy-content .roster-note {margin-top:16px;font-size:13px;color:var(--sub);line-height:1.8;border-top:1px dashed var(--border);padding-top:13px}.legacy-content .roster-note b {color:var(--text)}.legacy-content .map-grid {display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.legacy-content .map-card {position:relative;aspect-ratio:1.15;cursor:pointer;perspective:600px}.legacy-content .map-inner {position:absolute;inset:0;transition:transform .5s;transform-style:preserve-3d}.legacy-content .map-card.flip .map-inner {transform:rotateY(180deg)}.legacy-content .map-face {position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius);border:1.5px solid var(--border);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;padding:12px;text-align:center}.legacy-content .map-front {background:var(--card);box-shadow:var(--shadow-card)}.legacy-content .map-front .mp-icon {font-size:26px}.legacy-content .map-front .mp-name {font-size:14.5px;font-weight:800;color:var(--text)}.legacy-content .map-front .mp-hint {font-size:10.5px;font-weight:700;color:var(--ds)}.legacy-content .map-back {background:var(--ds-soft);border-color:var(--ds-line);transform:rotateY(180deg)}.legacy-content .map-back .mp-ai {font-size:12px;font-weight:800;color:var(--ds-deep);line-height:1.55}.legacy-content .map-back .mp-tag {font-size:10px;font-weight:800;color:var(--sub);letter-spacing:.5px}.legacy-content .takeaway-box {background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border:1.5px solid #bae6fd;border-radius:var(--radius);padding:24px 28px;margin-top:36px}.legacy-content .takeaway-box h3 {font-size:17px;font-weight:800;color:var(--ds-deep);margin-bottom:10px}.legacy-content .takeaway-box ul {list-style:none;padding:0;margin:0}.legacy-content .takeaway-box li {font-size:14.5px;color:#0c4a6e;line-height:1.8;padding:4px 0 4px 22px;position:relative}.legacy-content .takeaway-box li::before {content:'';position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:var(--ds)}@media (max-width:768px){.legacy-content .hunt-wrap {grid-template-columns:1fr}.legacy-content .roster-grid {grid-template-columns:1fr}.legacy-content .map-grid {grid-template-columns:repeat(2,1fr)}}

.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)}