.opg-board{--opg-row:#2c74c9;--opg-col:#2c74c9;--opg-ink:#2e2640;--opg-blank:#5b3fd6;--opg-active:#7c5cf0;--opg-active-bg:#f3eeff;--opg-line:#f0eaf9;--opg-edge:#e9e1f6;--opg-ok:#1e7a54;--opg-ok-bg:#eaf7f0;--opg-ok-edge:#37b27c;--opg-fix:var(--bsux-error-ink,#b23a2a);--opg-fix-bg:var(--bsux-peach-soft,#fff3ea);--opg-fix-edge:var(--bsux-error,#e5604d);--opg-muted:var(--bsux-muted,#8b8399);--opg-cols:3;flex-direction:column;align-items:center;gap:12px;width:100%;min-width:0;display:flex}.bsq-runner.bsq-opgrid .bsux-runner-card{margin-bottom:clamp(104px,16vh,140px)}@media (width>=768px){.bsq-runner.bsq-opgrid .bsux-runner-card{margin-bottom:0}}.opg-blank,.opg-walk,.opg-try,.opg-remember,.opg-correct{scroll-margin-bottom:clamp(112px,18vh,150px)}.bsq-runner.bsq-opgrid .bsux-prompt{text-align:center;margin:0;font-size:clamp(19px,2.8vw,25px);line-height:1.2}.bsq-runner.bsq-opgrid .bsux-runner-left{justify-content:flex-start;gap:clamp(12px,2vw,18px)}.opg-sr{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.opg-table{grid-template-columns:repeat(var(--opg-cols), minmax(52px, 84px));border:1px solid var(--opg-edge);background:#fff;border-radius:16px;max-width:100%;display:grid;overflow:hidden;box-shadow:0 12px 26px -18px #6746dc66}.opg-rowgroup{display:contents}.opg-cell{min-height:clamp(52px,8vw,64px);font-family:var(--bsux-font-display,"Baloo 2", system-ui);border:1px solid var(--opg-line);color:var(--opg-ink);background:0 0;justify-content:center;align-items:center;margin:0;padding:0;font-size:clamp(20px,3vw,26px);font-weight:800;display:flex;position:relative}.opg-corner{color:#5b3fd6;background:#f2ecff}.opg-head{color:var(--opg-row)}.opg-head-row{background:#faf7ff}.opg-hl-row{box-shadow:inset 0 0 0 3px var(--opg-row);background:#eef4fd}.opg-hl-col{box-shadow:inset 0 0 0 3px var(--opg-col);background:#eef4fd;border-style:dashed}.opg-role{font-family:var(--bsux-font-body,system-ui);letter-spacing:.02em;text-transform:uppercase;background:#fff;border:1px solid;border-radius:999px;padding:0 6px;font-size:.58rem;font-weight:800;line-height:1.5;position:absolute;bottom:2px;left:50%;transform:translate(-50%)}.opg-evidence{background:var(--opg-ok-bg);color:var(--opg-ok);box-shadow:inset 0 0 0 3px var(--opg-ok-edge)}.opg-blank{cursor:pointer;color:var(--opg-blank);font-family:var(--bsux-font-display,"Baloo 2", system-ui);background:#fff;border:2px dashed #c9bee8;font-size:clamp(20px,3vw,26px);font-weight:800}.opg-blank:focus-visible{outline:3px solid var(--opg-active);outline-offset:-3px}.opg-blank.opg-active{background:var(--opg-active-bg);border:2px solid var(--opg-active);box-shadow:inset 0 0 0 2px #7c5cf026}.opg-blank.opg-correct{background:var(--opg-ok-bg);color:var(--opg-ok);border:2px solid var(--opg-ok-edge);cursor:default}.opg-blank.opg-incorrect{background:var(--opg-fix-bg);color:var(--opg-fix);border:2px solid var(--opg-fix-edge)}.opg-blank.opg-unanswered{color:var(--opg-muted);border:2px dotted var(--opg-muted);background:#f7f5f1}.opg-blank-val{line-height:1}.opg-badge{width:19px;height:19px;font-family:var(--bsux-font-body,system-ui);color:#fff;border:2px solid #fff;border-radius:999px;justify-content:center;align-items:center;font-size:.7rem;font-weight:900;line-height:1;display:inline-flex;position:absolute;top:-6px;right:-6px}.opg-badge[data-status=correct]{background:var(--opg-ok-edge)}.opg-badge[data-status=incorrect]{background:var(--opg-fix-edge)}.opg-badge[data-status=unanswered]{background:var(--opg-muted)}.opg-connect{pointer-events:none;width:calc(100% + 32px);height:calc(100% + 32px);position:absolute;top:-16px;left:-16px;overflow:visible}.opg-line{fill:none;stroke-width:4px;stroke-linecap:round}.opg-line-row{stroke:var(--opg-row)}.opg-line-col{stroke:var(--opg-col);stroke-dasharray:7 5}.opg-ar-row{fill:var(--opg-row)}.opg-ar-col{fill:var(--opg-col)}.opg-ar-out{fill:var(--bsux-amber-ink,#b4791a)}.opg-live{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-soft-ink,#6e6683);text-align:center;margin:0;font-size:.92rem;line-height:1.45}.opg-correct{flex-direction:column;gap:10px;display:flex}.opg-card-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.opg-card-title{font-family:var(--bsux-font-display,system-ui);color:var(--opg-ink);margin:0;font-size:clamp(1rem,2.6vw,1.15rem)}.opg-strategy{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-purple-deep,#4b32b0);background:var(--bsux-lilac,#f2ecff);border:1px solid var(--bsux-lilac-line,#e6def8);border-radius:999px;padding:3px 12px;font-size:.76rem;font-weight:800}.opg-teach{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;flex-direction:column;gap:10px;max-height:clamp(170px,32dvh,400px);padding-right:2px;display:flex;overflow:hidden auto}.opg-teach:focus-visible{outline:3px solid var(--bsux-purple-lite,#8a6bff);outline-offset:3px;border-radius:12px}.opg-equation{font-family:var(--bsux-font-display,system-ui);color:var(--opg-ink);margin:0;font-size:clamp(1.1rem,3.4vw,1.4rem);font-weight:800}.opg-steps{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.opg-step{font-family:var(--bsux-font-body,system-ui);color:var(--opg-ink);align-items:flex-start;gap:10px;font-size:.96rem;line-height:1.45;display:flex}.opg-step-no{color:#fff;background:var(--bsux-purple,#6746dc);border-radius:999px;flex:none;justify-content:center;align-items:center;width:22px;height:22px;font-size:.72rem;font-weight:900;display:inline-flex}.opg-step-row .opg-step-no{background:var(--opg-row)}.opg-step-col .opg-step-no{background:var(--opg-col)}.opg-step-op .opg-step-no{background:var(--bsux-amber-ink,#b4791a)}.opg-step-result .opg-step-no{background:var(--opg-ok-edge)}.opg-step-current .opg-step-text{color:var(--opg-ink);font-weight:700}.opg-steps .opg-step:not(.opg-step-current) .opg-step-text{color:var(--bsux-soft-ink,#6e6683)}.opg-model{border:1px solid var(--opg-line);background:#fbf9f5;border-radius:14px;flex-direction:column;flex:none;align-items:center;max-width:100%;margin:0;padding:8px;display:flex;overflow:hidden}.opg-model svg{width:auto;max-width:100%;height:auto;max-height:clamp(64px,12dvh,118px)}.opg-model-cap{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-soft-ink,#6e6683);text-align:center;margin-top:6px;font-size:.82rem}.opg-check{background:var(--opg-ok-bg);border:1px solid var(--bsux-mint-line,#c8e9d7);color:var(--opg-ok);font-family:var(--bsux-font-body,system-ui);border-radius:12px;margin:0;padding:8px 12px;font-size:.93rem;font-weight:700}.opg-reuse{font-family:var(--bsux-font-body,system-ui);color:var(--opg-ink);margin:0;font-size:.94rem;line-height:1.45}.opg-linkbtn{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-purple-deep,#4b32b0);cursor:pointer;background:0 0;border:0;padding:6px 4px;font-size:.94rem;font-weight:700;text-decoration:underline}.opg-walk{border-top:1px dashed var(--opg-line);flex-wrap:wrap;align-items:center;gap:10px;padding-top:8px;display:flex}.opg-walk-count{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-soft-ink,#6e6683);white-space:nowrap;font-size:.83rem;font-weight:800}.opg-walk .bsux-btn{flex:1}.opg-try{border-top:1px dashed var(--opg-line);padding-top:8px}.opg-try-title{font-family:var(--bsux-font-display,system-ui);color:var(--bsux-purple-deep,#4b32b0);margin:0;font-size:1.02rem;font-weight:800}.opg-try-sub{font-family:var(--bsux-font-body,system-ui);color:var(--bsux-soft-ink,#6e6683);margin:2px 0 10px;font-size:.92rem}.opg-try-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.opg-try-row .bsux-btn{flex:auto}.opg-remember{background:#fff8e8;border:1px solid #f3e7c9;border-radius:18px;padding:14px 16px}.opg-remember-label{font-family:var(--bsux-font-body,system-ui);color:#b4791a;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;font-size:12px;font-weight:800}.opg-remember-text{font-family:var(--bsux-font-body,system-ui);color:#8a6a12;margin:0;font-size:clamp(14px,2.1vw,16px);font-weight:700;line-height:1.45}.opg-diagram{flex:none;align-self:center;width:min(290px,100%);height:auto}.opg-dg-box{fill:#fff;stroke-width:2.5px}.opg-dg-box-row{stroke:var(--opg-row);fill:#eef4fd}.opg-dg-box-col{stroke:var(--opg-col);fill:#eef4fd;stroke-dasharray:7 5}.opg-dg-box-out{stroke:var(--bsux-amber-ink,#b4791a);fill:#fff6e0}.opg-dg-text{font-family:var(--bsux-font-display,system-ui);text-anchor:middle;fill:var(--opg-ink);font-size:20px;font-weight:800}.opg-dg-line{fill:none;stroke-width:3.5px;stroke-linecap:round}.opg-dg-line-row{stroke:var(--opg-row)}.opg-dg-line-col{stroke:var(--opg-col);stroke-dasharray:7 5}.opg-dg-line-out{stroke:var(--bsux-amber-ink,#b4791a)}.opg-dg-op{fill:#fff6e0;stroke:var(--bsux-amber-ink,#b4791a);stroke-width:2.5px}.opg-dg-optext{font-family:var(--bsux-font-display,system-ui);text-anchor:middle;fill:var(--bsux-amber-ink,#b4791a);font-size:22px;font-weight:900}@keyframes opg-pulse{0%,to{opacity:1}50%{opacity:.55}}@media (prefers-reduced-motion:no-preference){.opg-line-col{animation:2.4s ease-in-out infinite opg-pulse}}@media (prefers-reduced-motion:reduce){.opg-line,.opg-dg-line,.opg-connect,.opg-diagram{transition:none!important;animation:none!important}}@media (width<=420px){.opg-table{grid-template-columns:repeat(var(--opg-cols), minmax(46px, 68px))}.opg-cell{min-height:48px;font-size:19px}}@media (height<=720px){.opg-cell{min-height:clamp(42px,8vh,58px)}.opg-teach{max-height:clamp(140px,26dvh,280px)}.opg-model svg{max-height:clamp(56px,10dvh,96px)}}.sq-board{--sq-ink:var(--bsux-ink,#2e2640);--sq-blank:var(--bsux-purple-ink,#5b3fd6);--sq-active:#7c5cf0;--sq-active-bg:#f3eeff;--sq-line:#f0eaf9;--sq-edge:#e9e1f6;--sq-dash:#c9bee8;--sq-ok:var(--bsux-green-deep,#1e7a54);--sq-ok-bg:var(--bsux-mint-soft,#eaf7f0);--sq-ok-edge:#37b27c;--sq-fix:var(--bsux-error-ink,#b23a2a);--sq-fix-bg:var(--bsux-peach-soft,#fff3ea);--sq-fix-edge:var(--bsux-error,#e5604d);--sq-muted:var(--bsux-soft-ink,#6e6683);--sq-op:var(--bsux-purple-ink,#5b3fd6);--sq-card:var(--bsux-card,#fff);flex-direction:column;align-items:center;gap:12px;width:100%;min-width:0;display:flex}.sq-blank{border:2px dashed var(--sq-dash);background:var(--sq-card);min-width:44px;min-height:44px;color:var(--sq-blank);font-family:var(--bsux-font-display,"Baloo 2", sans-serif);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;padding:0 6px;font-weight:800;transition:background .15s,border-color .15s;display:inline-flex;position:relative}.sq-sm{min-width:46px;min-height:44px;font-size:clamp(17px,3vw,22px)}.sq-md{min-width:56px;min-height:48px;font-size:clamp(19px,3.4vw,26px)}.sq-lg{min-width:96px;min-height:52px;font-size:clamp(22px,4vw,30px)}.sq-active{border-style:solid;border-color:var(--sq-active);background:var(--sq-active-bg);box-shadow:inset 0 0 0 3px #7c5cf026}.sq-correct{border-style:solid;border-color:var(--sq-ok-edge);background:var(--sq-ok-bg);color:var(--sq-ok)}.sq-incorrect{border-style:solid;border-color:var(--sq-fix-edge);background:var(--sq-fix-bg);color:var(--sq-fix)}.sq-unanswered{border-style:dotted;border-color:var(--sq-fix-edge);color:var(--sq-fix)}.sq-val{line-height:1}.sq-badge{color:#fff;background:var(--sq-ok-edge);border-radius:999px;justify-content:center;align-items:center;width:19px;height:19px;font-size:12px;font-weight:800;display:flex;position:absolute;top:-7px;right:-7px}.sq-badge[data-status=incorrect]{background:var(--sq-fix-edge)}.sq-badge[data-status=unanswered]{background:var(--sq-muted)}.sq-sr{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.sq-live{min-height:1px;color:var(--sq-muted);text-align:center;margin:0;font-size:14px;font-weight:700}.sq-chips{vertical-align:middle;gap:8px;display:inline-flex}.sq-chip{border:2px 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var(--sq-line);padding:clamp(7px,1.6vw,11px)}.sq-numlist{flex-direction:column;gap:clamp(8px,1.8vw,12px);width:100%;max-width:400px;display:flex}.sq-numlist-row{background:var(--sq-card);border:1px solid var(--sq-edge);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:clamp(8px,1.8vw,12px) clamp(10px,2vw,14px);display:flex}.sq-numlist-to{min-width:120px;font-family:var(--bsux-font-body,"Nunito", sans-serif);color:var(--sq-muted);flex:1;font-size:clamp(13px,2.2vw,15px);font-weight:700}.sq-bench{flex-direction:column;gap:clamp(14px,3vw,22px);width:100%;max-width:420px;display:flex}.sq-bench-line{height:74px;margin:0 18px;position:relative}.sq-bench-rail{background:var(--sq-dash);border-radius:4px;height:5px;position:absolute;top:42px;left:0;right:0}.sq-bench-end{font-family:var(--bsux-font-display,"Baloo 2", sans-serif);color:var(--sq-muted);font-size:clamp(15px,2.6vw,18px);font-weight:800;position:absolute;top:52px}.sq-bench-lo{left:0;transform:translate(-50%)}.sq-bench-hi{right:0;transform:translate(50%)}.sq-bench-mark{flex-direction:column;align-items:center;display:flex;position:absolute;top:0;transform:translate(-50%)}.sq-bench-n{font-family:var(--bsux-font-display,"Baloo 2", sans-serif);color:var(--bsux-purple,#6746dc);font-size:clamp(18px,3.2vw,24px);font-weight:800}.sq-bench-pin{background:var(--bsux-purple,#6746dc);border-radius:3px;order:2;width:4px;height:26px;margin-top:2px}.sq-bench-rows{flex-direction:column;gap:10px;display:flex}.sq-bench-sent{font-family:var(--bsux-font-display,"Baloo 2", sans-serif);color:var(--sq-ink);flex-wrap:wrap;align-items:center;gap:8px;margin:0;font-size:clamp(14px,2.4vw,17px);font-weight:800;display:flex}.sq-pyr{flex-direction:column;align-items:center;gap:clamp(5px,1.2vw,8px);display:flex}.sq-pyr-row{gap:clamp(5px,1.2vw,8px);display:flex}.sq-pyr-cell{background:var(--bsux-lilac,#f2ecff);border:1px solid var(--sq-edge);border-radius:12px;justify-content:center;align-items:center;min-width:56px;min-height:44px;display:inline-flex}.sq-pw{flex-direction:column;align-items:center;gap:6px;display:flex}.sq-pw-whole,.sq-pw-part{background:var(--bsux-lilac,#f2ecff);border:2px solid var(--sq-edge);border-radius:999px;justify-content:center;align-items:center;min-width:70px;min-height:60px;display:inline-flex}.sq-pw-legs{border-left:3px solid var(--sq-dash);border-right:3px solid var(--sq-dash);border-top:3px solid var(--sq-dash);border-radius:8px 8px 0 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60px));background:var(--sq-dash);border:3px solid var(--sq-ink);border-radius:12px;flex:none;gap:1px;padding:3px;display:grid}.sq-logic-cell{background:var(--sq-card);justify-content:center;align-items:center;min-height:46px;display:flex}.sq-box-b{border-bottom:3px solid var(--sq-ink)}.sq-box-r{border-right:3px solid var(--sq-ink)}.sq-correct{flex-direction:column;gap:14px;display:flex}.sq-card-head{flex-direction:column;gap:2px;display:flex}.sq-card-eyebrow{letter-spacing:.07em;text-transform:uppercase;color:var(--bsux-purple-ink,#5b3fd6);font-size:12px;font-weight:800}.sq-card-title{font-family:var(--bsux-font-display,"Baloo 2", 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0 2px 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-b{box-shadow:inset 0 -2px 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-l{box-shadow:inset 2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-r{box-shadow:inset -2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-t.sq-cage-l{box-shadow:inset 0 2px 0 0 var(--bsux-cage,#6746dc), inset 2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-t.sq-cage-r{box-shadow:inset 0 2px 0 0 var(--bsux-cage,#6746dc), inset -2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-b.sq-cage-l{box-shadow:inset 0 -2px 0 0 var(--bsux-cage,#6746dc), inset 2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-b.sq-cage-r{box-shadow:inset 0 -2px 0 0 var(--bsux-cage,#6746dc), inset -2px 0 0 0 var(--bsux-cage,#6746dc)}.sq-logic-cell.sq-cage-t.sq-cage-l.sq-cage-r{box-shadow:inset 0 2px 0 0 var(--bsux-cage,#6746dc), inset 2px 0 0 0 var(--bsux-cage,#6746dc), inset -2px 0 0 0 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var(--bsux-cage,#6746dc)}.sq-cage-sum{z-index:1;color:var(--bsux-cage,#6746dc);pointer-events:none;font-family:Nunito,system-ui,sans-serif;font-size:clamp(9px,2vw,11px);font-weight:800;line-height:1;position:absolute;top:1px;left:3px}.sq-dec{font-variant-numeric:tabular-nums;flex-wrap:nowrap;align-items:center;gap:1px;display:inline-flex}.sq-dec-point{color:var(--bsux-ink,#2e2640);font-size:clamp(12px,3vw,16px);font-weight:800;line-height:1}.sq-pyr[data-places] .sq-pyr-cell{min-width:0}.sq-pyr[data-places] .sq-dec-point{font-size:clamp(10px,2.4vw,13px)}.sq-numlist-claim{color:var(--bsux-ink-soft,#6b6480);margin:2px 0 0;font-family:Nunito,system-ui,sans-serif;font-size:clamp(11px,2.6vw,13px)}.sq-numlist-claim .sq-claim-value{color:var(--bsux-ink,#2e2640);font-weight:800}.sq-bench-mark-2{transform:translate(-50%)translateY(14px)}.sq-bench-mark-2 .sq-bench-n{color:var(--bsux-accent,#6746dc)}.sq-col-rule-part{opacity:.45;height:1px}.sq-col-partial{opacity:.95}.sq-frac-live 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0;font-family:Nunito,system-ui,sans-serif;font-size:clamp(13px,2.6vw,16px);font-weight:700;display:flex}.sq-g5-note{color:var(--sq-muted);text-align:center;margin:6px 0 0;font-family:Nunito,system-ui,sans-serif;font-size:clamp(12px,2.5vw,14px);font-weight:700}.sq-ld{flex-direction:column;align-items:center;gap:8px;width:100%;display:flex}.sq-ld-box{flex-direction:column;align-items:flex-start;display:flex}.sq-ld-quot{align-items:center;gap:6px;min-height:4px;margin-left:clamp(38px,9vw,54px);display:flex}.sq-ld-quot-empty{height:2px;display:block}.sq-ld-rem{align-items:center;gap:3px;display:inline-flex}.sq-ld-remlabel{color:var(--sq-muted);font-family:Nunito,system-ui,sans-serif;font-size:clamp(12px,2.4vw,15px);font-weight:800}.sq-ld-row{align-items:stretch;display:flex}.sq-ld-divisor,.sq-ld-dividend{font-family:var(--bsux-font-display,"Baloo 2", sans-serif);color:var(--sq-ink);font-variant-numeric:tabular-nums;padding:4px 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10px;font-size:clamp(19px,3.6vw,26px);font-weight:800}.sq-pv-ones{border-right:3px solid var(--sq-op)}.sq-pv-ask{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;margin:0;display:flex}.sq-cp{flex-direction:column;align-items:center;gap:10px;width:100%;display:flex}.sq-cp-grid{width:min(100%,320px)}.sq-cp-svg{width:100%;height:auto;display:block}.sq-cp-line{stroke:var(--sq-line);stroke-width:.5px}.sq-cp-axis{stroke:var(--sq-ink);stroke-width:1.4px}.sq-cp-shape{fill:var(--sq-active-bg);stroke:var(--sq-op);stroke-width:1.6px;fill-opacity:.6}.sq-cp-vertex{fill:var(--sq-op)}.sq-cp-vertex-open{fill:var(--sq-card);stroke:var(--sq-op);stroke-width:1.4px}.sq-cp-point{fill:var(--sq-blank)}.sq-cp-tag{font-family:var(--bsux-font-display,"Baloo 2", 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