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auto;grid-template-columns:none}.game-scene{justify-content:center;align-items:center;gap:var(--gap);flex-direction:column;min-width:0;min-height:0;display:flex;position:relative;overflow:hidden}.game-controls{justify-content:center;align-items:center;min-height:0;display:flex}.c-tens{color:var(--tens)}.c-ones{color:#c27a1f}.c-hundreds{color:var(--hundreds)}.c-tens-fill{fill:#2f6a9c}.c-tens-bg{color:#24557f;background:#d6e6f3}.c-ones-bg{color:#8a5513;background:#f9e2c4}.number-entry{align-items:center;gap:var(--gap);flex-direction:column;display:flex}.entry-label{font-weight:700;font-size:var(--text-size)}.entry-fields{gap:10px;display:flex}.entry-field{width:calc(var(--key) * 1.05);height:calc(var(--key) * 1.15);border-radius:var(--radius);border:4px solid var(--surface-line);background:#fff;place-items:center;display:grid;position:relative}.entry-field.place-tens{border-color:var(--tens);background:#eef4fa}.entry-field.place-ones{border-color:var(--ones);background:#fdf3e6}.entry-field.place-hundreds{border-color:var(--hundreds);background:#f1f2f4}.entry-field.is-active{box-shadow:0 0 0 5px var(--hint)}.entry-letter{font-size:16px;font-weight:700;position:absolute;top:2px;left:8px}.entry-digit{font-size:var(--digit);line-height:1}.place-tens .entry-letter,.place-tens .entry-digit{color:#24557f}.place-ones .entry-letter,.place-ones .entry-digit{color:#8a5513}.keypad{grid-template-columns:repeat(3, var(--key));grid-auto-rows:var(--key);gap:var(--gap);display:grid}.key{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);font-size:calc(var(--digit) * .85);color:var(--text);border:0;place-items:center;display:grid}.key:active:not(:disabled){box-shadow:var(--shadow-press);transform:translateY(2px)}.key:disabled{opacity:.45}.key-soft{background:#ece4d4}.key-ok{background:var(--ok);color:#fff}.game-layout[data-orientation=landscape][data-size=md] .number-entry,.game-layout[data-size=sm][data-orientation=landscape] .number-entry{flex-direction:row}.slab{background:var(--surface);box-shadow:var(--shadow);border-radius:22px;padding:14px 26px}.equation,.dh-prompt{font-size:var(--digit);flex-wrap:wrap;justify-content:center;align-items:center;gap:.35em;line-height:1.1;display:flex}.dh-word{font-family:var(--font-head);font-size:calc(var(--text-size) * 1.1);font-weight:800}.eq-op{color:var(--text-soft)}.eq-gap{border:4px dashed var(--tens);background:#fff;border-radius:14px;place-items:center;min-width:1.6em;height:1.3em;padding:0 .15em;display:inline-grid}.eq-gap.is-correct{border-style:solid;border-color:var(--ok);background:#e3f3e9}.answer-stones{grid-template-columns:repeat(2, minmax(var(--key-lg), 1fr));gap:calc(var(--gap) * 1.5);display:grid}.answer-stones[data-count="3"]{grid-template-columns:repeat(3, minmax(var(--key-lg), 1fr))}.game-layout[data-orientation=portrait] .answer-stones{grid-template-columns:repeat(4, minmax(var(--key), 1fr))}.game-layout[data-orientation=portrait],.game-layout[data-size=sm]{--stone:var(--key-lg)}.game-layout[data-size=sm][data-orientation=portrait] .answer-stones,.game-layout[data-orientation=portrait] .answer-stones[data-count="2"]{grid-template-columns:repeat(2, minmax(var(--key-lg), 1fr))}.game-layout[data-orientation=portrait] .answer-stones[data-count="3"]{grid-template-columns:repeat(3, minmax(var(--key-lg), 1fr))}.answer-stone{min-width:var(--stone,calc(var(--key-lg) * 1.3));min-height:var(--stone,calc(var(--key-lg) * 1.3));box-shadow:0 6px 0 #9ea7b0, var(--shadow);font-size:var(--digit);color:var(--text);background:linear-gradient(#d3dae1,#b8c0c8);border:0;border-radius:20px;place-items:center;padding:8px 14px;display:grid}.answer-stone.is-correct{box-shadow:0 6px 0 #468e61, var(--shadow);background:linear-gradient(#a6d8b7,#5bae7a)}.answer-stone:disabled:not(.is-correct){opacity:.6}.m7-scene{align-items:center;gap:var(--gap);flex-direction:column;width:100%;display:flex}.m7-frame{width:min(100%,520px)}.twenty-frame{width:100%;height:auto}.example-card{border:3px solid var(--hint);background:#fff8dc;border-radius:18px;flex-direction:column;gap:6px;max-width:100%;padding:12px 18px;display:flex}.example-title{align-items:center;gap:8px;font-size:18px;font-weight:700;display:flex}.example-line{font-size:calc(var(--text-size) * 1.05)}.draggable{z-index:2;touch-action:none;cursor:grab;border:0;position:relative}.draggable:active{cursor:grabbing;z-index:10}.m1-scene{flex-direction:column;justify-content:center;align-items:center;gap:16px;width:100%;height:100%;min-height:0;display:flex}.m1-target{font-size:calc(var(--digit) * 1.25);background:var(--surface);box-shadow:var(--shadow);border-radius:20px;padding:6px 26px;line-height:1}.m1-board{aspect-ratio:760/470;flex:0 auto;width:100%;min-height:0;max-height:100%}.m1-head{font-family:var(--font-head);font-size:34px;font-weight:800}.m1-count{font-family:var(--font-body);font-size:40px;font-weight:700}.m1-board [data-testid=placed-ten],.m1-board [data-testid=placed-one]{cursor:pointer}.m1-supply{grid-template-columns:repeat(2, minmax(var(--key-lg), 1fr));gap:calc(var(--gap) * 1.5);align-items:stretch;display:grid}.game-layout[data-orientation=portrait] .m1-supply{grid-template-columns:repeat(3, minmax(var(--key-lg), 1fr))}.supply-item{min-height:calc(var(--key-lg) * 1.7);min-width:calc(var(--key-lg) * 1.2);background:var(--surface);box-shadow:var(--shadow);border-radius:20px;flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:10px;font-size:20px;font-weight:700;display:flex}.supply-rod{width:34px;height:calc(var(--key-lg) * 1.2)}.supply-cube{width:54px;height:54px}.btn-done{min-height:var(--touch-lg);grid-column:1/-1}.game-layout[data-orientation=portrait] .btn-done{grid-column:auto}.m1-hint-line,.m2-note,.m5-rule,.m5-inverse,.m3-tip,.m6-tip{font-size:calc(var(--text-size) * .95);background:#fff8dc;border-radius:14px;align-items:center;gap:8px;margin:0;padding:6px 14px;display:inline-flex}.m3-tip,.m6-tip{background:0 0}.m1-example{align-items:center;gap:14px;display:flex}.m1-example .digits{font-size:var(--digit)}.m2-cave{width:100%;height:100%;min-height:0;display:grid;position:relative}.m2-cave-svg{grid-area:1/1;width:100%;height:100%}.m2-cave-content{justify-content:center;align-items:center;gap:var(--gap);flex-direction:column;grid-area:1/1;padding:10px;display:flex}.m2-listen{min-height:var(--touch-lg);background:var(--surface);box-shadow:var(--shadow);font-family:var(--font-head);border:0;border-radius:999px;align-items:center;gap:12px;padding:10px 28px;font-weight:800;display:inline-flex}.m2-parts{background:#fbf8f2eb;border-radius:16px;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;padding:8px 14px;display:flex}.word-chip{border-radius:12px;padding:4px 14px;font-weight:700}.m2-arrow-note{font-size:18px}.m2-echo,.m2-shown{font-size:calc(var(--digit) * 1.4);background:var(--surface);box-shadow:var(--shadow);border-radius:20px;padding:8px 28px;line-height:1}.m2-echo span{opacity:.35;transition:opacity .4s var(--ease)}.m2-echo span.is-lit{opacity:1}.m2-echo-back{background:#fbf8f2eb;border-radius:14px;padding:6px 14px}.m2-choices{gap:var(--gap);flex-direction:column;align-items:stretch;display:flex}.game-layout[data-orientation=portrait] .m2-choices{flex-flow:wrap;justify-content:center}.echo-stone{min-height:var(--key-lg);min-width:calc(var(--key-lg) * 2);background:var(--surface);box-shadow:var(--shadow);font-family:var(--font-head);border:4px solid #0000;border-radius:20px;justify-content:center;align-items:center;gap:12px;padding:10px 22px;font-weight:800;display:inline-flex}.echo-stone.is-picked{border-color:var(--tens)}.echo-stone.is-correct{border-color:var(--ok)}.m3-scene,.m4-scene,.m5-scene,.m6-scene{justify-content:center;align-items:center;gap:var(--gap);flex-direction:column;width:100%;height:100%;min-height:0;display:flex}.m3-question{font-family:var(--font-head);font-weight:800;font-size:calc(var(--text-size) * 1.1);align-items:center;gap:12px;display:flex}.m3-big{font-size:var(--digit)}.m3-path-wrap,.m4-line-wrap{width:100%;min-height:0;max-height:100%;position:relative}.m3-svg,.m4-svg{width:100%;height:100%;display:block}.m3-label,.m4-label{font-family:var(--font-body);fill:var(--text);font-size:34px;font-weight:700}.m3-stone-text{font-family:var(--font-body);fill:var(--text);font-size:32px;font-weight:700}.m3-supply{align-items:center;gap:var(--gap);flex-direction:column;display:flex}.game-layout[data-orientation=portrait] .m3-supply{flex-direction:row}.bridge-stone{min-width:calc(var(--key-lg) * 1.2);min-height:var(--key-lg);box-shadow:0 6px 0 #9ea7b0, var(--shadow);font-size:var(--digit);background:linear-gradient(#d3dae1,#b8c0c8);border-radius:18px;place-items:center;padding:8px 20px;display:grid}.seq-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;display:flex}.seq-cell{align-items:center;gap:6px;display:flex}.seq-stone{min-width:calc(var(--key) * 1.15);min-height:var(--key);font-size:calc(var(--digit) * .85);background:#e8d9b5;border-radius:16px;place-items:center;padding:4px 10px;display:grid;box-shadow:0 5px #c9b994}.seq-gap{border:4px dashed var(--tens);box-shadow:none;background:#fff}.seq-gap.is-glow{box-shadow:0 0 0 6px var(--hint)}.seq-gap.is-filled{border-style:solid;border-color:var(--ok);background:#e3f3e9}.seq-jump{color:#2f6a9c;font-size:22px}.m4-handle-anchor{width:0;height:0;position:absolute}.m4-handle{left:calc(var(--touch-lg) / -2);top:calc(var(--touch-lg) / -2);width:var(--touch-lg);height:var(--touch-lg);background:#f2d16b8c;border-radius:50%;place-items:center;display:grid;position:absolute}.m4-handle-dot{background:var(--text);border-radius:50%;width:30px;height:30px}.m4-jump{font-family:var(--font-body);fill:#a8661a;font-size:32px;font-weight:700}.m4-notes{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.m4-note{background:var(--surface);border-radius:12px;padding:4px 14px;font-size:24px}.m4-hint-frame{background:#fff8dc;border-radius:14px;align-items:center;gap:12px;padding:6px 12px;display:flex}.m4-tenframe{width:230px;height:56px}.m4-drag-tip p{text-align:center;max-width:18em;margin:0}.m5-wall{flex:1;width:100%;min-height:0;max-height:100%}.m5-wall-small{width:240px;height:auto}.m5-num{font-family:var(--font-body);fill:var(--text);font-size:46px;font-weight:700}.mirror-grid{background:#d8ebf5;border-radius:20px;gap:6px;width:min(100%,150cqh - 180px);max-height:100%;padding:10px;display:grid;position:relative}.mirror-grid.is-small{gap:3px;width:220px;padding:4px}.mcell{aspect-ratio:1;background:#fff9;border:0;border-radius:10px;min-width:0}.mcell.is-target{background:#ffffffd9}.mcell.state-given{background:#c98f5a;box-shadow:inset 0 -6px #b07a48}.mcell.state-placed{background:#5b93c4;box-shadow:inset 0 -6px #3e7cb1}.mcell.state-preview{background:#5b93c473}.mcell.state-ghost{background:#f2d16b8c}.mirror-axis{background:var(--hint);pointer-events:none;border-radius:4px;position:absolute}.mirror-axis[data-axis=vertical]{width:6px;top:4px;bottom:4px;left:calc(50% - 3px)}.mirror-axis[data-axis=horizontal]{height:6px;top:calc(50% - 3px);left:4px;right:4px}.m6-controls{align-items:center;gap:var(--gap);flex-direction:column;display:flex}.shape-row{gap:calc(var(--gap) * 2);grid-template-columns:repeat(3,minmax(0,1fr));width:min(100%,900px);display:grid}.shape-tile{aspect-ratio:1;min-height:var(--key-lg);box-shadow:var(--shadow);background:#d8ebf5cc;border:4px solid #0000;border-radius:24px;place-items:center;display:grid;position:relative}.shape-tile.is-correct{border-color:var(--ok)}.shape-svg{width:80%;height:80%}.shape-name{background:var(--surface);border-radius:999px;padding:2px 12px;font-size:20px;font-weight:700;position:absolute;bottom:8px}.shape-example{width:160px;height:160px}