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8px;display:grid;position:relative;container-type:inline-size}.place-head{color:var(--tone-ink);justify-items:center;line-height:1.1;display:grid}.place-head abbr{font-size:30px;font-weight:800;text-decoration:none}.place-name{font-size:12px;font-weight:700}@container (max-width:110px){.place-name{display:none}}.place-stack{--u:min(10px, calc(100cqi / 16.5));min-height:calc(var(--u) * 12.5);justify-content:center;align-items:flex-end;width:100%;display:flex}.piece{animation:piece-in .35s var(--spring) both;animation-delay:calc(min(var(--b), 9) * 12ms);flex:none;line-height:0;display:block}.block-piece{height:auto;display:block;overflow:visible}.piece.ghost{opacity:.3;filter:saturate(0);animation:none}.block-piece.unit,.block-piece.ten{width:calc(var(--u) * 1.9)}.block-piece.hundred{width:calc(var(--u) * 10.9)}.block-piece.thousand{width:calc(var(--u) * 15.4)}.place-stack.unit{place-content:center flex-start;column-gap:calc(var(--u) * .7);height:calc(var(--u) * 12.3);flex-flow:column-reverse wrap;min-height:0;margin-top:auto}.place-stack.unit .piece+.piece{margin-bottom:calc(var(--u) * -.75)}.place-stack.unit .piece:nth-child(10n+1){margin-bottom:0}.place-stack.ten{width:calc(var(--u) * 9.5 + 8px);padding-top:calc(var(--u) * 7.4);flex-wrap:wrap-reverse;place-content:flex-start center;column-gap:2px;margin-top:auto}.place-stack.ten .piece{margin-top:calc(var(--u) * -7.4)}.place-stack:is(.hundred,.thousand){flex-direction:column-reverse;justify-content:flex-start;align-items:center}.place-stack.hundred .piece+.piece{margin-bottom:calc(var(--u) * -10.9 + min(var(--u) * 2.6, var(--u) * 11 / max(1, var(--n) - 1)))}.place-stack.thousand .piece+.piece{margin-bottom:calc(var(--u) * -15.4 + min(var(--u) * 3.6, var(--u) * 11 / max(1, var(--n) - 1)))}.place-steppers{flex-wrap:wrap-reverse;justify-content:center;gap:8px;display:flex}.stepper{background:var(--surface);width:52px;height:52px;color:var(--ink);box-shadow:var(--shadow-sm);transition:transform .2s var(--spring), background-color .2s var(--ease), opacity .2s;border:0;border-radius:999px;place-items:center;padding:0;display:grid}.stepper.add{background:var(--ink);color:#fff}.stepper:active:not(:disabled){transform:scale(.92)}.stepper:disabled{opacity:.35;cursor:default;box-shadow:none}.place-exchange{align-content:start;gap:6px;width:100%;min-height:48px;display:grid}.exchange{background:var(--surface);width:100%;min-height:48px;color:var(--tone-ink);box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--tone) 35%, transparent);transition:transform .2s var(--spring), opacity .2s;border:0;border-radius:999px;padding:6px 8px;font-size:14px;font-weight:800}.exchange.join{background:var(--ink);color:#fff;box-shadow:var(--shadow-sm);animation:pop-in .4s var(--spring) both}.exchange:active:not(:disabled){transform:scale(.95)}.exchange:disabled{opacity:.4;cursor:default}.build-board.is-correct{box-shadow:0 0 0 3px var(--success), 0 0 0 9px var(--success-soft);animation:celebrate .65s var(--spring)}.place-column.is-wrong{box-shadow:inset 0 0 0 3px var(--danger);animation:shake .45s var(--ease)}.build-board>.mark{z-index:1;top:-14px;right:-14px}.place-table{width:calc(min(var(--board-max), 100%) + 24px);table-layout:fixed;border-collapse:separate;border-spacing:12px 0;max-width:calc(100% + 24px);margin:-4px 0 0}.place-table th{background:var(--tone-soft);height:30px;color:var(--tone-ink);text-align:center;border-radius:14px 14px 0 0;padding:0;font-size:15px;font-weight:800}.place-table th abbr{text-decoration:none}.place-table td{background:var(--bg);height:58px;color:var(--ink);text-align:center;font-variant-numeric:tabular-nums;border-radius:0 0 16px 16px;padding:0;font-size:30px;font-weight:800;transition:background-color .2s,color .2s}.place-table td.is-over{background:var(--amber-soft);color:var(--amber-ink)}.place-table td.is-wrong{background:var(--danger-soft);box-shadow:inset 0 0 0 3px var(--danger)}.place-table .answer-row td{background-clip:padding-box;background-color:var(--success-soft);color:var(--success-ink);box-shadow:inset 0 0 0 3px var(--success);border-top:8px solid #0000;border-radius:24px 24px 16px 16px}.build-note{background:var(--amber-soft);color:var(--amber-ink);text-align:center;border-radius:18px;max-width:560px;margin:0;padding:8px 16px;font-size:14px;font-weight:700}:is(.build-split,.share-split){color:var(--ink);text-align:center;letter-spacing:-.01em;margin:0;font-size:19px;font-weight:800}:is(.build-split,.share-split).is-correct{color:var(--success-ink)}.share-engine{--tone:var(--cyan);--tone-soft:var(--cyan-soft);--tone-ink:var(--cyan-ink);gap:16px}.share-tray{border-radius:var(--radius-xl);background:var(--bg);grid-template-columns:auto minmax(0,1fr);align-items:center;gap:14px;width:min(900px,100%);min-height:92px;padding:12px 16px 12px 12px;transition:box-shadow .2s,background-color .2s;display:grid}.share-tray.is-empty{background:var(--surface-2)}.share-tray-label{min-width:76px;color:var(--muted);justify-items:center;font-size:13px;font-weight:700;display:grid}.share-tray-label strong{color:var(--ink);font-variant-numeric:tabular-nums;font-size:28px;line-height:1.1}.share-tray-items{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;display:flex}.share-tray.is-over{box-shadow:inset 0 0 0 3px var(--focus)}.share-tray.is-correct{box-shadow:inset 0 0 0 3px var(--success)}.share-tray.is-wrong{background:var(--danger-soft);box-shadow:inset 0 0 0 3px var(--danger)}.share-item{--img:42px;--card-fill:var(--surface);--card-radius:18px;background:var(--surface);width:58px;height:58px;color:var(--ink);box-shadow:var(--shadow-sm);transition:transform .2s var(--spring), box-shadow .2s var(--ease);animation:pop-in .35s var(--spring) both;border:0;border-radius:18px;place-items:center;padding:0;display:grid;position:relative}.share-item .stimulus-text{font-size:14px;font-weight:800}.share-item:disabled{opacity:1;cursor:default}.share-item:active:not(:disabled){transform:scale(.93)}.share-item.is-selected{box-shadow:inset 0 0 0 3px var(--ink), var(--shadow-md);transform:translateY(-4px)}.share-groups{--cols:3;grid-template-columns:repeat(var(--cols), minmax(0, 1fr));gap:14px;width:min(900px,100%);display:grid}.share-groups.groups-2{--cols:2;width:min(640px,100%)}.share-groups:is(.groups-4,.groups-7,.groups-8){--cols:4}.share-group{border-radius:var(--radius-xl);background:var(--tone-soft);min-height:176px;animation:pop-in .4s var(--spring) both;animation-delay:calc(var(--i,0) * 60ms);cursor:pointer;grid-template-rows:auto minmax(0,1fr);gap:10px;padding:10px;transition:box-shadow .2s,background-color .2s;display:grid;position:relative}.share-head{background:var(--surface);width:100%;min-height:50px;color:var(--tone-ink);box-shadow:var(--shadow-sm);transition:transform .2s var(--spring), box-shadow .2s;border:0;border-radius:999px;justify-content:space-between;align-items:center;gap:8px;padding:8px 8px 8px 16px;font-size:16px;font-weight:800;display:flex}.share-head:disabled{opacity:1;cursor:default}.share-count{background:var(--tone);color:#fff;font-variant-numeric:tabular-nums;min-width:32px;height:32px;animation:count-bump .35s var(--spring);border-radius:999px;place-items:center;padding:0 9px;font-size:15px;display:grid}.share-body{background:var(--surface);min-height:96px;box-shadow:inset 0 0 0 7px color-mix(in srgb, var(--tone) 9%, white), inset 0 0 0 8px color-mix(in srgb, var(--tone) 18%, white);border-radius:26px;flex-wrap:wrap;place-content:center;gap:6px;padding:12px;display:flex}.share-body .share-item{--img:34px;border-radius:14px;width:48px;height:48px;box-shadow:0 1px 2px #0f1a3a14,0 4px 10px -6px #0f1a3a4d}.share-group.is-target{box-shadow:inset 0 0 0 2px var(--tone);animation:breathe 1.8s var(--ease) infinite}.share-group.is-over{box-shadow:inset 0 0 0 3px var(--focus), var(--shadow-md)}.share-group.is-correct{background:var(--success-soft);box-shadow:inset 0 0 0 3px var(--success);cursor:default}.share-group.is-wrong{background:var(--danger-soft);box-shadow:inset 0 0 0 3px var(--danger);animation:shake .45s var(--ease);cursor:default}.share-group .mark{top:-10px;right:-10px}.engine .share-item{touch-action:none}@keyframes count-bump{40%{transform:scale(1.25)}}.ran-engine{gap:14px}.ran-top{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 18px;display:flex}.ran-top .adult-label{text-align:center;margin:0}.ran-meter{background:var(--primary-soft);min-height:52px;color:var(--ink);font-variant-numeric:tabular-nums;transition:background-color .25s var(--ease), color .25s var(--ease);border-radius:999px;align-items:center;gap:12px;padding:6px 20px 6px 16px;display:inline-flex}.ran-meter svg{flex:none}.ran-time{font-size:15px;font-weight:700}.ran-time strong{color:inherit;letter-spacing:-.02em;text-align:right;min-width:3.4ch;font-size:28px;font-weight:800;display:inline-block}.ran-errors{border-left:2px solid color-mix(in srgb, currentColor 22%, transparent);color:var(--coral-ink);padding-left:12px;font-size:15px;font-weight:800}.ran-engine.is-running .ran-meter{background:var(--ink);color:#fff}.ran-engine.is-running .ran-errors{color:#ffb4a6}.ran-board{--gap-x:8px;--cell:clamp(44px, calc((100dvh - 500px) / var(--rows)), 104px);grid-template-columns:repeat(var(--cols), minmax(0, 1fr));gap:12px var(--gap-x);width:min(100%, calc(var(--cols) * var(--cell) + (var(--cols) - 1) * var(--gap-x)));display:grid;container-type:inline-size}.ran-cell{--sym:clamp(15px, calc(min(var(--cell), calc((100cqi - (var(--cols) - 1) * var(--gap-x)) / var(--cols))) * .6), 58px);aspect-ratio:1;border-radius:clamp(10px, calc(var(--sym) * .45), 22px);background:var(--bg);min-width:0;min-height:36px;color:var(--ink);transition:box-shadow .15s var(--ease), background-color .15s var(--ease), transform .15s var(--spring);border:0;place-items:center;padding:0;display:grid;position:relative}.ran-cell .stimulus-text{font-size:var(--sym);letter-spacing:0;font-weight:800;line-height:1}.ran-cell .stimulus img{width:calc(var(--sym) * 1.4);height:calc(var(--sym) * 1.4)}.ran-cell:disabled{opacity:1;cursor:default}.ran-cell:active:not(:disabled){transform:scale(.94)}.ran-cell.is-error{background:var(--coral-soft);box-shadow:inset 0 0 0 3px var(--coral)}.ran-flag{background:var(--coral);color:#fff;width:20px;height:20px;animation:mark-in .3s var(--spring) both;border-radius:50%;place-items:center;display:grid;position:absolute;top:3px;right:3px}.ran-engine.is-ready .ran-cell{background:var(--surface-2)}.ran-note{max-width:560px;color:var(--muted);text-align:center;margin:0;font-size:13px;font-weight:600}.ran-clock{min-width:160px}@media (hover:hover) and (pointer:fine){.stepper:hover:not(:disabled){box-shadow:var(--shadow-md);transform:translateY(-2px)}.stepper.add:hover:not(:disabled){background:var(--primary-hover)}.exchange:hover:not(:disabled){transform:translateY(-2px)}.place-head abbr{cursor:help}.share-item:hover:not(:disabled):not(.is-selected){box-shadow:var(--shadow-md);transform:translateY(-3px)}.engine .share-item:not(:disabled){cursor:grab}.share-head:hover:not(:disabled){box-shadow:var(--shadow-md);transform:translateY(-2px)}.ran-cell:hover:not(:disabled):not(.is-error){background:var(--surface);box-shadow:inset 0 0 0 2px var(--border-strong)}}.player.low-stimulation .build-board.is-correct{box-shadow:0 0 0 3px var(--success)}.player.low-stimulation .share-group.is-target{box-shadow:inset 0 0 0 2px var(--tone)}.player.low-stimulation .ran-engine.is-running .ran-meter{background:var(--primary-soft);color:var(--ink)}.player.low-stimulation .ran-engine.is-running .ran-errors{color:var(--coral-ink)}.preview-paper .build-target{padding:6px 32px;font-size:clamp(40px,5vw,56px)}.hero-preview .build-target{font-size:40px}@media (max-height:820px){.player .build-engine{gap:10px}.player .build-target{padding:2px 28px;font-size:42px}.player .place-column{gap:6px;padding:8px 6px}.player .place-head abbr{font-size:26px}.player .place-stack{min-height:calc(var(--u) * 11)}.player .stepper{width:48px;height:48px}.player .place-table th{height:26px}.player .place-table td{height:46px;font-size:26px}.player .share-group{min-height:150px}.player .share-body{min-height:76px}}@media (max-width:650px){.build-board{column-gap:8px}.place-table{width:calc(min(var(--board-max), 100%) + 16px);border-spacing:8px 0;max-width:calc(100% + 16px)}.place-column{border-radius:22px;gap:8px;padding:10px 4px}.place-head abbr{font-size:26px}.stepper{width:48px;height:48px}.exchange{padding:6px 4px;font-size:13px}.place-table td{border-radius:14px;height:50px;font-size:26px}.build-target{padding:6px 24px}.share-tray{grid-template-columns:minmax(0,1fr);justify-items:center;gap:8px;padding:10px}.share-tray-label{grid-auto-flow:column;align-items:baseline;gap:6px}.share-tray-label strong{font-size:20px}.share-item{--img:36px;border-radius:16px;width:50px;height:50px}.share-body .share-item{--img:30px;border-radius:12px;width:44px;height:44px}.share-groups,.share-groups:is(.groups-4,.groups-5,.groups-6,.groups-7,.groups-8){--cols:2;gap:10px}.share-groups.groups-3{--cols:3;gap:8px}.share-group{gap:8px;min-height:140px;padding:8px}.share-head{min-height:48px;padding:6px 6px 6px 12px;font-size:14px}.share-count{min-width:28px;height:28px;font-size:14px}.share-body{border-radius:20px;min-height:72px;padding:10px 6px}.share-groups.groups-3 .share-head{flex-wrap:wrap;justify-content:center;padding:6px}.share-groups.groups-3 .share-body{gap:4px;padding:8px 3px}.share-groups.groups-3 .share-body .share-item{--img:26px;border-radius:11px;width:36px;height:36px}.ran-board{--gap-x:4px;row-gap:10px}.ran-flag{width:16px;height:16px;top:2px;right:2px}.ran-flag svg{width:11px;height:11px}.ran-meter{gap:10px;padding:6px 16px 6px 12px}.ran-time strong{font-size:24px}}.print-item .stimulus{--fig:84px}.print-item .row.center .stimulus{--fig:72px}.print-build{flex-wrap:wrap;align-items:center;gap:18px 32px;display:flex}.print-build .print-target{letter-spacing:-.02em;color:var(--ink);font-variant-numeric:tabular-nums;margin:0;font-size:56px;font-weight:800;line-height:1}.print-places{border-collapse:collapse;table-layout:fixed}.print-places th,.print-places td{border:1.5px solid var(--border-strong);text-align:center;width:78px}.print-places th{color:var(--ink);background:var(--surface);padding:6px 4px;font-size:22px;font-weight:800}.print-places th small{color:var(--muted);font-size:10px;font-weight:700;display:block}.print-places td{background:var(--surface);height:68px}.print-share-objects{flex-wrap:wrap;gap:6px 8px;margin-top:4px;display:flex}.print-share-objects .stimulus img{width:36px;height:36px}.print-share-objects .stimulus-text{font-size:14px}.print-share-groups{grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin-top:16px;display:grid}.print-share-group{border:1.5px dashed var(--subtle);background:var(--surface);min-height:112px;color:var(--muted);border-radius:22px;padding:8px 12px;font-size:13px;font-weight:700}.print-ran{grid-template-columns:repeat(var(--cols,10), minmax(0, 1fr));gap:10px 6px;margin-top:10px;display:grid}.print-ran>.stimulus{background:var(--surface);border-radius:12px;min-height:52px;padding:4px 0}.print-ran .stimulus-text{font-size:30px;font-weight:800;line-height:1}.print-ran .stimulus img{width:46px;height:46px}.print-ran-lines{flex-wrap:wrap;gap:8px 28px;display:flex}.print-ran-lines .print-line{flex:200px}@media print{.fraction-picture,.blocks-picture,.block-piece{-webkit-print-color-adjust:exact;print-color-adjust:exact}.print-item .stimulus{--fig:76px}.print-places th,.print-places td,.print-share-group{border-color:#9aa1b5}.print-ran>.stimulus{background:0 0;border:1px solid #d5d9e3}.print-ran .stimulus-text{font-size:24pt}.engine-actions{display:none}}@keyframes piece-in{0%{opacity:0;transform:translateY(-10px)scale(.9)}}