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16px;display:flex}.kids__card{background:#0000002e;border-radius:16px;width:100%;max-width:400px;padding:16px 24px 24px}.kids__header{grid-template-columns:40px 1fr 40px;align-items:center;margin-bottom:16px;display:grid}.kids__header h1{text-align:center;margin:0;font-size:1.25rem;font-weight:400}.kids__back{width:40px;height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:0;font-size:2rem;line-height:1}.kids__dots{justify-content:flex-end;gap:4px;margin:0;padding:0;list-style:none;display:flex}.kids__dots li{background:#ffffff4d;border-radius:50%;width:8px;height:8px}.kids__dots li.is-current{background:var(--color-white)}.kids__ops,.kids__counts{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.kids__chips{flex-wrap:wrap;gap:8px;display:flex}.kids__chip{color:#ffffffb8;cursor:pointer;touch-action:manipulation;background:#ffffff14;border:2px solid #ffffff40;border-radius:12px;min-width:48px;height:48px;font-size:1.15rem}.kids__chip[aria-pressed=true]{border-color:var(--color-blue);background:var(--color-blue);color:var(--color-white)}.kids__chip--op{height:56px;font-size:1.75rem}.kids__chip--count{height:52px}.kids__chip--count[aria-pressed=true]{border-color:var(--color-green);background:var(--color-green);color:var(--color-primary)}.kids__all{min-height:48px;color:var(--text-muted);cursor:pointer;justify-content:center;align-items:center;gap:8px;display:flex}.kids__all input{width:20px;height:20px;accent-color:var(--color-green)}.kids__section+.kids__section{border-top:1px solid #ffffff1f;margin-top:16px;padding-top:16px}.kids__section h2{color:var(--text-muted);margin:0 0 10px;font-size:1rem;font-weight:400}.kids__section-head{justify-content:space-between;align-items:baseline;display:flex}.kids__link{color:#74b9ff;cursor:pointer;background:0 0;border:0;min-height:32px}.kids__next{width:100%;height:56px;margin-top:20px}.kids__start .real-button__face{color:var(--color-green)}.kids__history{margin-top:16px}.kids__history h2{color:#ffffff80;margin:0 0 8px;font-size:.75rem;font-weight:400}.kids__history ul{gap:6px;margin:0;padding:0;list-style:none;display:grid}.kids__history button{width:100%;min-height:44px;color:var(--color-primary);text-align:left;cursor:pointer;background:#ffffffd9;border:0;border-radius:10px;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;font-size:.85rem;display:flex}.kids-dialog{background:var(--color-primary);width:min(440px,100vw - 32px);max-height:calc(100dvh - 32px);color:var(--text-on-dark);overscroll-behavior:contain;border:0;border-radius:16px;padding:40px 24px 24px;position:relative;overflow-y:auto}.kids-dialog::backdrop{background:#0009}.kids-dialog .kids__header h2{text-align:center;margin:0;font-size:1.25rem;font-weight:400}.kids-dialog__close{width:40px;height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:0;font-size:1.25rem;position:absolute;top:8px;right:8px}.kids-dialog__close:focus-visible{outline:2px solid var(--text-muted);outline-offset:-4px;border-radius:10px}.duel-ready{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:20px;min-height:100dvh;padding:24px 16px;display:flex}.duel-ready h1{margin:0;font-size:2rem}.duel-ready__options{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.duel-ready__options label{color:var(--text-muted);align-items:center;gap:8px;display:flex}.duel-ready__options select{background:var(--color-primary);min-height:44px;color:var(--text-on-dark);font:inherit;border:2px solid #ffffff4d;border-radius:10px;padding:0 12px}.duel-ready__kids{align-items:center;gap:12px;margin:0;display:flex}.duel-ready__change{color:#74b9ff;min-height:44px;font:inherit;cursor:pointer;background:0 0;border:2px solid #ffffff4d;border-radius:10px;padding:0 14px}.duel-ready__players{grid-template-columns:repeat(2,minmax(0,300px));gap:24px;display:grid}.duel-ready__player{border-top:6px solid var(--player-color);background:#0003;border-radius:16px;padding:20px}.duel-ready__player--p1,.duel-half--p1{--player-color:#74b9ff}.duel-ready__player--p2,.duel-half--p2{--player-color:#fdcb6e}.duel-ready__player h2{color:var(--player-color);margin:0}.duel-ready__player p{color:var(--text-muted);margin:8px 0}.duel-ready__caps{justify-content:center;gap:12px;display:flex}.duel-ready__cap{width:72px;height:72px;color:var(--text-on-dark);cursor:pointer;touch-action:manipulation;background:#ffffff14;border:2px solid #ffffff4d;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:2px;font-size:1.25rem;display:flex}.duel-ready__cap.is-registered{border-color:var(--color-green);background:var(--color-green);color:var(--color-primary)}.duel-ready__state{font-size:1.1rem}.duel-ready__hint{color:var(--text-muted);margin:0}.duel-ready__home{width:140px;height:52px}kbd{font-family:inherit;font-size:.85rem;line-height:1}.duel{overscroll-behavior:none;touch-action:manipulation;-webkit-user-select:none;user-select:none;background:#000;gap:4px;display:grid;position:fixed;inset:0}.duel--side{grid-template-columns:1fr 1fr}.duel--face{grid-template-rows:1fr 1fr}.duel__slot{min-width:0;min-height:0}.duel__slot--flipped{transform:rotate(180deg)}.duel-half{border-top:6px solid var(--player-color);background:var(--color-primary);flex-direction:column;align-items:center;height:100%;transition:opacity .2s;display:flex}.duel-half>.timer-bar{align-self:stretch}.duel-half{position:relative;overflow:hidden}.duel-half__flash{pointer-events:none;animation:.35s ease-out forwards duel-flash;position:absolute;inset:0}.duel-half__flash.is-right{background:var(--color-green)}.duel-half__flash.is-wrong{background:var(--color-red)}@keyframes duel-flash{0%{opacity:.35}to{opacity:0}}.duel-half__name{color:var(--player-color);margin:12px 0 0;font-size:1.25rem}.duel-half__equation{flex:1;align-items:center;min-height:0;display:flex}.duel-half .equation{font-size:clamp(2.5rem,min(11vw,13dvh),7rem)}.duel--side .duel-half .equation{font-size:clamp(2.5rem,min(7vw,15dvh),7rem)}.duel-half__progress{color:var(--text-muted);margin:2px 0 0}.duel-half__status{min-height:1.6em;color:var(--text-muted);margin:4px 0;font-size:1.6rem}.duel-half__status.is-right{color:var(--color-green)}.duel-half__status.is-wrong{color:#ff8a80}.duel-half__buttons{gap:16px;display:flex}.duel-half__button{aspect-ratio:1;width:min(140px,18vw,16dvh);min-width:72px;min-height:64px}.duel-half__button .real-button__face{flex-direction:column;gap:4px;padding:14%}.duel-half__icon{flex:1;width:100%;min-height:0;display:flex}.duel-half__button:disabled{opacity:.5}.duel-half__score{margin:12px 0 16px;font-size:1.25rem}.duel__overlay{color:var(--color-white);font:inherit;background:#0000008c;border:0;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.duel__countdown{font-size:9rem}.duel__overlay--paused{cursor:pointer;font-size:2rem}.duel__result{text-align:center;background:#2c3e50f5;padding:20px 16px;position:fixed;top:50%;left:0;right:0;transform:translateY(-50%)}.duel__result-text{margin:0 0 16px;font-size:clamp(1.5rem,4vw,2.5rem)}.duel__result-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.duel__result-actions .real-button{min-width:150px;height:52px}.duel-small{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100dvh;padding:24px 16px;display:flex}.duel-small p{color:var(--text-muted)}.duel-small__link{background:var(--color-green);min-height:48px;color:var(--color-primary);border-radius:12px;align-items:center;padding:0 24px;text-decoration:none;display:inline-flex}.gate{background:var(--color-primary);width:min(360px,100vw - 32px);color:var(--text-on-dark);text-align:center;border:0;border-radius:16px;padding:24px}.gate::backdrop{background:#0009}.gate h2{margin:0 0 16px;font-size:1.5rem}.gate label{margin-bottom:12px;font-size:1.25rem;display:block}.gate input{width:100%;height:52px;color:var(--text-on-dark);font:inherit;text-align:center;background:#ffffff1a;border:2px solid #ffffff4d;border-radius:12px;font-size:1.5rem}.gate__wrong{color:#ff8a80;margin:12px 0 0}.gate__actions{gap:12px;margin-top:20px;display:flex}.gate__actions .real-button{flex:1;height:52px}.home{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:16px;max-width:480px;min-height:100dvh;margin:0 auto;padding:32px 16px 24px;display:flex}.home__logo{margin:0}.home__logo img{width:min(280px,70vw);height:auto;display:block}.home__tagline{color:var(--text-muted);margin:0}.home__play{width:160px;height:72px}.home__play .real-button__face{padding:12px}.home__row{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.home__kids,.home__duel{min-width:160px;height:56px}.home__event{min-width:220px;height:56px}.home__section-title{color:var(--text-muted);margin:8px 0;font-size:1rem;font-weight:400}.home__modes ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.home__mode{--ink:#1d6fa5;width:100%;height:56px}.home__mode .real-button__face{font-size:1.15rem}.home__about p{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}.home__footer{color:var(--text-muted);padding-top:8px}.home__footer p{margin:0 0 8px}.home__stores{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.home__stores a{background:var(--color-green);min-height:48px;color:var(--color-primary);border-radius:12px;align-items:center;padding:0 20px;text-decoration:none;display:inline-flex}.play{min-height:100dvh;padding:max(8px, env(safe-area-inset-top)) 8px max(8px, env(safe-area-inset-bottom));overscroll-behavior:none;touch-action:manipulation;background:#000;justify-content:center;align-items:center;display:flex}.play__board{background:var(--game-color);width:100%;max-width:560px;height:min(100dvh - 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8px;font-size:.85rem}.play__mode-name{font-size:1.5rem}.play__score{justify-self:end;font-size:2.25rem}.play__quit{height:48px;font-size:1.25rem}.play__stage{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:clamp(8px,4dvh,40px);min-height:0;padding:0 16px 16px;display:flex}.play__equation{flex-direction:column;justify-content:center;align-items:center;display:flex}.equation{font-variant-numeric:tabular-nums;flex-direction:column;align-items:center;font-size:clamp(2.5rem,min(22vw,15dvh),8rem);line-height:1;display:flex}.equation__line{align-items:center;gap:.15em;display:flex}.equation__result.is-right,.equation__result.is-wrong,.equation__correct{-webkit-text-stroke:6px var(--color-white);paint-order:stroke fill;text-shadow:none}.equation__badge{border:4px solid var(--color-white);width:.55em;height:.55em;color:var(--color-white);border-radius:50%;padding:.11em;display:inline-flex}.equation__badge.is-right{background:var(--color-green)}.equation__badge.is-wrong{background:var(--color-red)}.equation__correct{color:var(--color-green);font-size:.85em}.equation__result.is-right{color:var(--color-green)}.equation__result.is-wrong{color:var(--color-red)}.play__paused{text-align:center;margin:8px 0 0;font-size:1.5rem}.answer-buttons{justify-content:center;gap:16px;width:100%;display:flex}.answer-button{aspect-ratio:1;width:min(200px,42vw,30dvh);min-width:80px}.answer-button .real-button__face{padding:18%;position:relative}.answer-button__keys{gap:4px;display:flex;position:absolute;top:8px;left:8px}.answer-button__keys kbd{background:var(--color-gray);min-width:1.5em;color:var(--color-primary);font:inherit;text-align:center;border-radius:6px;padding:2px 6px;font-size:.9rem;line-height:1.2}.answer-button:disabled{opacity:0}.score-board{width:100%;text-shadow:none;flex-direction:column;align-items:center;gap:16px;display:flex}.score-board__card{background:var(--color-primary);text-align:center;border-radius:16px;width:100%;max-width:400px;padding:16px}.score-board__card p{margin:0;line-height:1.05}.score-board__title{color:var(--color-gray);font-size:1.5rem}.score-board__title.is-best{color:var(--color-green)}.score-board__title.is-close{color:var(--color-red)}.score-board__number{font-size:3.5rem}.score-board__actions{gap:12px;width:100%;max-width:400px;display:flex}.score-board__icon-button,.score-board__text-button{flex:1 1 0;max-width:120px;height:58px;margin:0 auto}.score-board__icon-button .real-button__face{padding:10px}@media (orientation:landscape) and (height<=520px){.play__header{padding:8px}.play__stage{flex-direction:row;gap:24px}.play__equation,.play__stage>.answer-buttons,.play__stage>.score-board{flex:1 1 0}.equation{font-size:clamp(2.5rem,20dvh,6rem)}.answer-button{width:min(160px,40dvh)}.score-board{gap:8px}.score-board__card{padding:8px}.score-board__number{font-size:2.25rem}}.kids-result__headline{font-size:1.75rem}.kids-result__headline.is-perfect{color:var(--color-green)}.score-board__card .kids-result__mode{color:var(--text-muted);margin:4px 0 12px;font-size:.95rem}.kids-result__stats{justify-content:space-evenly;margin:8px 0 0;display:flex}.kids-result__stats dt{color:var(--text-muted);font-size:.875rem}.kids-result__stats dd{margin:4px 0 0;font-size:1.6rem}.kids-result__stats .is-correct{color:var(--color-green)}.kids-result__stats .is-wrong{color:#ff8a80}.kids-result__stats .is-accuracy{color:#74b9ff}@font-face{font-family:RelayBold;src:url(/fonts/relay-bold.woff2)format("woff2");font-display:swap}:root{--color-primary:#2c3e50;--color-blue:#3498db;--color-red:#e74c3c;--color-green:#2ecc71;--color-gray:#ecf0f1;--color-white:#fff;--text-on-dark:#fff;--text-muted:#ffffffb8;--button-face:#fff;--button-shadow:#d9d9d9;--font-game:"RelayBold", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{min-height:100dvh;margin:0}body{background:var(--color-primary);color:var(--text-on-dark);font-family:var(--font-game);-webkit-tap-highlight-color:transparent}button{font:inherit}:focus-visible{outline:3px solid var(--color-white);outline-offset:3px}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.static-intro{max-width:480px;margin:0 auto;padding:32px 16px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}