@font-face{font-family:BIZ UDGothic;font-style:normal;font-weight:700;font-display:swap;src:url(/kids-study-app/fonts/biz-udgothic-700.woff2)format("woff2")}:root{--color-bg:#ffe9f4;--color-bg-soft:#ffd9ec;--color-primary:#ff8fc7;--color-primary-dark:#ff5fae;--color-primary-soft:#ffd3ea;--color-accent:#ffd166;--color-accent-soft:#fff1cf;--color-accent-dark:#e0a83a;--color-success:#7ed6a5;--color-success-soft:#dff7ea;--color-error:#ff9b8a;--color-error-soft:#ffe6e1;--color-text:#4a3b4a;--color-text-soft:#8a7a8a;--color-surface:#fff2f8;--color-paper:#fff;--color-border:#ffcbe4;--radius-lg:32px;--radius-md:24px;--radius-sm:16px;--shadow-card:0 8px 24px #ff5fae2e;--shadow-button:0 6px 0 var(--color-primary-dark);--font-family:"Hiragino Maru Gothic ProN", "Rounded Mplus 1c", "Zen Maru Gothic", "Hiragino Sans", sans-serif;--touch-target-min:clamp(48px, 8vh, 88px)}*{box-sizing:border-box}html,body{overscroll-behavior:none;width:100%;height:100%;margin:0;position:fixed;inset:0;overflow:hidden}#root{overscroll-behavior:none;position:absolute;inset:0;overflow:hidden}.fit-viewport{touch-action:none;position:absolute;inset:0;overflow:hidden}.fit-viewport-inner{transform-origin:top;flex-direction:column;min-height:100%;display:flex;position:relative}body{font-family:var(--font-family);background:radial-gradient(circle, #ff8fc729 2.5px, transparent 3px) 0 0 / 28px 28px, radial-gradient(circle, #ffd16624 2px, transparent 2.5px) 14px 14px / 28px 28px, linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);background-color:var(--color-bg);color:var(--color-text);word-break:keep-all;overflow-wrap:break-word;-webkit-tap-highlight-color:transparent}:not(input):not(textarea){-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}input,textarea{-webkit-user-select:text;user-select:text}img{-webkit-user-drag:none}button{font-family:inherit;transition:scale .32s cubic-bezier(.34,1.9,.5,1)}button:not(:disabled):active{transition:scale 70ms ease-out;scale:.92}.category-card:not(:disabled):active,.level-button:not(:disabled):active,.choice-button:not(:disabled):active{scale:.96}@keyframes screen-enter{0%{opacity:0;transform:translateY(14px)scale(.985)}to{opacity:1;transform:none}}@keyframes screen-enter-forward{0%{opacity:0;transform:translate(32px)}to{opacity:1;transform:none}}@keyframes screen-enter-back{0%{opacity:0;transform:translate(-32px)}to{opacity:1;transform:none}}@keyframes screen-enter-open{0%{opacity:0;border-radius:40px;transform:scale(.55)}60%{opacity:1}to{opacity:1;transform:none}}.screen{animation:.34s cubic-bezier(.22,1,.36,1) screen-enter}.screen[data-nav=forward]{animation:.26s cubic-bezier(.22,1,.36,1) screen-enter-forward}.screen[data-nav=back]{animation:.26s cubic-bezier(.22,1,.36,1) screen-enter-back}.screen[data-nav=open]{animation:.3s cubic-bezier(.22,1,.36,1) screen-enter-open}@media (prefers-reduced-motion:reduce){.screen,.screen[data-nav]{animation:none}}.tap-sparkle-layer{pointer-events:none;z-index:100;position:fixed;inset:0;overflow:hidden}.tap-sparkle{font-size:12px;line-height:1;animation:.45s ease-out forwards tap-sparkle;position:absolute;translate:-50% -50%}@keyframes tap-sparkle{0%{opacity:1;transform:translate(0)scale(.6)rotate(0)}to{transform:translate(var(--dx), var(--dy)) scale(1.1) rotate(90deg);opacity:0}}.floating-backdrop{pointer-events:none;position:absolute;inset:0;overflow:hidden}.floating-item{will-change:transform;justify-content:center;align-items:center;line-height:1;animation-name:float-rise,float-sway;animation-timing-function:linear,ease-in-out;animation-iteration-count:infinite,infinite;animation-direction:normal,alternate;display:flex;position:absolute;bottom:-60px}.floating-heart{color:#ffb3d1;opacity:.45}.floating-bubble{opacity:.6;background:radial-gradient(circle at 32% 30%,#ffffffe6 0 18%,#ffffff26 45%,#ffb6d540 100%);border-radius:50%;box-shadow:inset 0 0 0 1.5px #ffa0c873}@keyframes float-rise{0%{translate:0}to{translate:0 calc(-100vh - 120px)}}@keyframes float-sway{0%{transform:translateX(calc(var(--sway) * -1)) rotate(-8deg)}to{transform:translateX(var(--sway)) rotate(8deg)}}.screen{padding:max(clamp(8px, 1.5vh, 24px), env(safe-area-inset-top)) max(clamp(12px, 4vw, 24px), env(safe-area-inset-right)) max(clamp(8px, 1.5vh, 24px), env(safe-area-inset-bottom)) max(clamp(12px, 4vw, 24px), env(safe-area-inset-left));flex-direction:column;flex:1 0 auto;align-items:center;gap:clamp(6px,1.2vh,22px);display:flex;position:relative}.screen-body{flex-direction:column;flex:1 0 auto;justify-content:center;align-items:center;gap:clamp(8px,1.8vh,24px);width:100%;display:flex}.screen-actions{flex-direction:column;align-items:stretch;gap:clamp(8px,1.5vh,14px);width:100%;max-width:420px;display:flex}.screen-actions--row{flex-direction:row}.screen-actions--row>button{flex:1 1 0;min-width:0;padding-left:12px;padding-right:12px}.top-bar{flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:clamp(6px,1.2vh,12px);width:100%;max-width:960px;display:flex}.top-bar-nav{flex-shrink:0;gap:8px;display:flex}.icon-button.nav-button{width:clamp(48px,7vh,56px);height:clamp(48px,7vh,56px);color:var(--color-primary-dark)}.nav-button svg{fill:none;stroke:currentColor;stroke-width:2.6px;stroke-linecap:round;stroke-linejoin:round;width:55%;height:55%}.category-header{color:#fff;border-radius:999px;align-items:center;gap:10px;min-width:0;padding:clamp(6px,1.2vh,10px) clamp(12px,4vw,22px);display:flex}.category-header-symbol{background:#fff;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;min-width:clamp(24px,4vh,30px);height:clamp(24px,4vh,30px);padding:0 6px;font-size:clamp(12px,2.2vh,15px);font-weight:800;display:flex}.category-header-label{white-space:nowrap;text-overflow:ellipsis;min-width:0;font-size:clamp(14px,2.6vh,18px);font-weight:800;overflow:hidden}.app-title{color:var(--color-primary-dark);margin:0;font-size:clamp(18px,3.2vh,30px);font-weight:800}.subtitle{text-align:center;color:var(--color-text-soft);margin:0;font-size:clamp(14px,2.4vh,22px);font-weight:700}.character-portrait{width:clamp(42px, 8vh, var(--portrait-max));aspect-ratio:1;max-width:100%}.character-portrait.character-portrait--hero{width:clamp(64px, 15vh, var(--portrait-max))}.character-showcase-wrap{width:100%;max-width:960px;position:relative}.character-showcase-wrap:after{content:"";background:linear-gradient(to right, transparent, var(--color-bg-soft));pointer-events:none;width:36px;transition:opacity .2s;position:absolute;top:0;bottom:4px;right:0}.character-showcase-wrap.at-end:after{opacity:0}.character-showcase{overscroll-behavior:contain;touch-action:pan-x;scroll-snap-type:x proximity;justify-content:safe center;align-items:flex-end;gap:4px;width:100%;padding-bottom:4px;display:flex;overflow:auto hidden}.character-showcase>*{scroll-snap-align:start;flex:none}.character-intro-button{cursor:pointer;background:0 0;border:none;border-radius:50%;padding:0}.home-greeting{max-width:100%;color:var(--color-text);text-align:center;box-shadow:var(--shadow-card);background:#fff;border-radius:14px;margin:-4px 0 0;padding:5px 14px;font-size:clamp(12px,1.9vh,15px);font-weight:800;animation:.35s cubic-bezier(.34,1.56,.64,1) greeting-in;position:relative}.home-greeting:before{content:"";border:7px solid #0000;border-top:0;border-bottom-color:#fff;position:absolute;top:-7px;left:30px}@keyframes greeting-in{0%{opacity:0;transform:translateY(6px)scale(.85)}to{opacity:1;transform:none}}.character-intro-button.is-waving{transform-origin:50% 90%;animation:.8s ease-in-out mascot-wave}@keyframes mascot-wave{0%,to{transform:none}20%{transform:translateY(-10px)rotate(-8deg)}40%{transform:translateY(-10px)rotate(8deg)}60%{transform:translateY(-4px)rotate(-6deg)}80%{transform:translateY(0)rotate(3deg)}}.hint-caption{color:var(--color-text-soft);margin:-8px 0 0;font-size:clamp(11px,1.8vh,14px);font-weight:700}.category-grid{flex:1 0 auto;grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:minmax(56px,1fr);gap:clamp(6px,1.4vh,14px);width:100%;max-width:560px;display:grid}.set-size-toggle{background:var(--color-surface);box-shadow:var(--shadow-card);border-radius:999px;gap:clamp(6px,1.2vh,12px);padding:6px;display:flex}.set-size-button{color:var(--color-text-soft);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:clamp(6px,1.5vh,10px) 22px;font-size:clamp(13px,2.2vh,16px);font-weight:700}.set-size-button.active{background:var(--color-primary);color:#fff}.category-card{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);text-align:left;border:2px solid var(--color-border);cursor:pointer;color:var(--color-text);align-items:center;gap:clamp(6px,2vw,12px);padding:4px clamp(8px,2.5vw,14px);font-size:clamp(13px,2vh,24px);font-weight:800;display:flex;position:relative}.category-card-figure{flex-shrink:0;display:flex;position:relative}.category-card .character-portrait{width:clamp(44px,7vh,72px)}.category-label{min-width:0;font-size:min(clamp(14px,2.3vh,22px),4.2vw);line-height:1.25}:lang(en) .category-label{font-size:min(clamp(13px,2.1vh,20px),3.6vw)}.category-symbol{color:var(--color-primary-dark);background:var(--color-primary-soft);min-width:clamp(20px,3.4vh,28px);height:clamp(20px,3.4vh,28px);box-shadow:0 0 0 2px var(--color-surface);border-radius:999px;justify-content:center;align-items:center;padding:0 4px;font-size:clamp(10px,1.5vh,14px);font-weight:800;display:flex;position:absolute;top:-4px;left:-4px}.opposite-prompt-word{border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-card);color:var(--color-text);margin:0;padding:clamp(6px,1.4vh,12px) clamp(18px,4vw,28px);font-size:clamp(26px,5.5vh,44px);font-weight:800}.quiz-prompt-stack{flex-direction:column;align-items:center;gap:clamp(6px,1.5vh,16px);display:flex}.choice-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(8px,2vh,20px);width:100%;max-width:560px;display:grid}.choice-button{min-height:var(--touch-target-min);border-radius:var(--radius-md);border:2px solid var(--color-border);background:var(--color-surface);box-shadow:var(--shadow-card);color:var(--color-text);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:clamp(4px,1vh,8px);padding:clamp(6px,1.5vh,12px);font-size:clamp(16px,3.4vh,24px);font-weight:800;display:flex}.choice-button.correct{background:var(--color-success-soft);box-shadow:0 0 0 4px var(--color-success) inset, 0 0 0 0 #ff7eb699;animation:.5s cubic-bezier(.34,1.56,.64,1) correct-pop,.9s ease-out correct-glow}.choice-button.correct:disabled{opacity:1}@keyframes correct-pop{0%{transform:scale(1)}40%{transform:scale(1.12)}to{transform:scale(1)}}@keyframes correct-glow{0%{box-shadow:0 0 0 4px var(--color-success) inset, 0 0 0 0 #ff7eb6b3}to{box-shadow:0 0 0 4px var(--color-success) inset, 0 0 0 22px #ff7eb600}}.choice-button.incorrect{background:var(--color-error-soft);box-shadow:0 0 0 4px var(--color-error) inset}.choice-button:disabled{opacity:.6}.primary-button{min-height:var(--touch-target-min);background:var(--color-primary);color:#fff;box-shadow:var(--shadow-button);cursor:pointer;border:none;border-radius:999px;padding:0 40px;font-size:clamp(16px,3vh,22px);font-weight:800}.primary-button:active{box-shadow:none;transform:translateY(4px)}.next-button.is-reserved{visibility:hidden}.secondary-button{min-height:var(--touch-target-min);border:3px solid var(--color-primary-soft);background:var(--color-surface);color:var(--color-text);cursor:pointer;border-radius:999px;padding:0 32px;font-size:clamp(15px,2.8vh,20px);font-weight:700}.equation-text{color:var(--color-text);text-align:center;font-size:clamp(32px,7vh,56px);font-weight:800}.result-score-text{color:var(--color-text);text-align:center;font-size:min(clamp(22px,4.4vh,36px),7.4vw);font-weight:800}.equation-blank{vertical-align:-.1em;border:4px dashed var(--color-primary);border-radius:var(--radius-sm);width:.85em;height:.85em;display:inline-block}.story-text{color:var(--color-text);text-align:center;max-width:480px;font-size:clamp(18px,3.2vh,26px);font-weight:700;line-height:1.5}.visual-item{font-size:clamp(24px,5vh,40px)}.visual-item.removed{opacity:.25}.pattern-visual-row{overscroll-behavior:contain;touch-action:pan-x;flex-wrap:nowrap;justify-content:center;gap:8px;width:100%;padding:4px;display:flex;overflow-x:auto}.pattern-visual-item{flex-shrink:0;font-size:clamp(22px,4.5vh,34px);line-height:1}.pattern-slot{border:3px dashed var(--color-text-soft);border-radius:var(--radius-sm);opacity:.6;justify-content:center;align-items:center;min-width:clamp(30px,5.5vh,44px);min-height:clamp(30px,5.5vh,44px);display:inline-flex}.pattern-slot.correct,.pattern-slot.incorrect{opacity:1;border-style:solid;animation:.25s pattern-slot-pop}.pattern-slot.correct{border-color:var(--color-success);background:var(--color-success-soft)}.pattern-slot.incorrect{border-color:var(--color-error);background:var(--color-error-soft)}@keyframes pattern-slot-pop{0%{transform:scale(.6)}60%{transform:scale(1.12)}to{transform:scale(1)}}.addition-visual{flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;max-width:560px;display:flex}.addition-visual-group{flex-wrap:wrap;justify-content:center;gap:4px;max-width:230px;display:flex}.addition-visual-item{font-size:clamp(28px,6vh,52px);line-height:1}.addition-visual-plus{color:var(--color-primary-dark);font-size:clamp(22px,5vh,40px);font-weight:800}.subtraction-visual-row{flex-wrap:wrap;justify-content:center;gap:6px;max-width:480px;display:flex}.subtraction-visual-item{font-size:clamp(28px,6vh,52px);line-height:1}.subtraction-visual-item.removed{opacity:.25}.interactive-clock{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);flex-direction:column;align-items:center;gap:6px;padding:clamp(10px,2vh,20px) clamp(14px,4vw,28px) clamp(12px,2.2vh,24px);display:flex}.interactive-clock svg{width:clamp(88px,13vh,220px);height:clamp(88px,13vh,220px)}.clock-choice-text{white-space:nowrap;font-size:clamp(15px,2.8vh,22px)}.clock-read-face svg{width:min(80vw,36vh,380px);height:min(80vw,36vh,380px);display:block}.interactive-clock--large{gap:4px;padding:clamp(6px,1.2vh,14px) clamp(8px,2vw,16px)}.interactive-clock--large svg{width:min(84vw,44vh,420px);height:min(84vw,44vh,420px)}.digital-clock{font-variant-numeric:tabular-nums;color:var(--color-text);background:var(--color-bg-soft);border-radius:var(--radius-sm);margin-top:4px;padding:4px 20px;font-size:clamp(22px,4vh,34px);font-weight:800}.digital-clock-reading{color:var(--color-text-soft);margin:0;font-size:clamp(13px,2.2vh,16px);font-weight:700}.level-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(6px,1.5vh,16px);width:100%;max-width:560px;display:grid}.level-grid>:last-child:nth-child(odd){grid-column:1/-1}.mode-grid .mode-card{gap:clamp(4px,1vh,10px);min-height:clamp(84px,15vh,150px)}.mode-card-label{color:var(--color-text);font-size:clamp(18px,3.2vh,26px);font-weight:800}.mode-card-description{color:var(--color-text-soft);font-size:clamp(12px,1.8vh,15px);font-weight:700;line-height:1.35}.level-button{min-height:var(--touch-target-min);border-radius:var(--radius-md);border:2px solid var(--color-border);background:var(--color-surface);box-shadow:var(--shadow-card);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:clamp(3px,.8vh,6px);padding:clamp(8px,1.8vh,18px) 8px clamp(6px,1.4vh,14px);display:flex;position:relative}.level-number{color:var(--color-text);font-size:clamp(20px,3.6vh,28px);font-weight:800}.level-stars{color:var(--color-accent);letter-spacing:1px;font-size:clamp(11px,1.8vh,14px)}.level-description{color:var(--color-text-soft);text-align:center;font-size:clamp(11px,1.7vh,14px);line-height:1.3}.card-panel{background:var(--color-surface);border-radius:var(--radius-lg);border:2px solid var(--color-border);box-shadow:var(--shadow-card);text-align:center;flex-direction:column;align-items:center;gap:clamp(6px,1.4vh,20px);width:100%;max-width:600px;padding:clamp(14px,2.4vh,32px);display:flex}.card-panel.quiz-card{flex:1 0 auto;justify-content:center}.quiz-answer-area{justify-content:center;width:100%;margin-top:auto;display:flex}.quiz-answer-area:empty{display:none}.quiz-answer-area .choice-button{min-height:clamp(52px,8vh,88px)}.quiz-feedback{flex-direction:column;align-items:center;gap:clamp(4px,.8vh,8px);width:100%;display:flex}.quiz-feedback-row{justify-content:center;align-items:center;gap:clamp(6px,2vw,14px);max-width:100%;display:flex}.character-portrait.quiz-feedback-portrait{flex-shrink:0;width:clamp(44px,7vh,72px)}.quiz-feedback-row .feedback-banner{min-width:0}.card-panel p{margin:0}.screen.screen-scroll{overscroll-behavior:contain;touch-action:pan-y;position:absolute;inset:0;overflow-y:auto}.result-button-row{flex-wrap:wrap;justify-content:center;gap:clamp(8px,1.5vh,16px);display:flex}.card-panel-wide{max-width:920px}.spot-difference-board{flex-direction:column;align-items:center;gap:clamp(6px,1.5vh,12px);width:100%;display:flex}.spot-counts{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.spot-found-count{white-space:nowrap;color:var(--color-primary-dark);background:var(--color-primary-soft);border-radius:999px;padding:clamp(3px,1vh,6px) 12px;font-size:max(12px,min(1.9vh,3.4vw,17px));font-weight:800}.spot-wrong-count{white-space:nowrap;color:var(--color-error);background:var(--color-error-soft);border-radius:999px;padding:clamp(3px,1vh,6px) 18px;font-size:max(12px,min(1.9vh,3.4vw,17px));font-weight:800}.spot-panels{flex-direction:column;align-items:center;gap:clamp(8px,2vh,16px);width:100%;display:flex}.spot-scene-panel{aspect-ratio:3/2;border-radius:var(--radius-md);background-color:var(--color-accent-soft);width:min(100%,560px,46.5vh);box-shadow:var(--shadow-card);background-size:100% 100%;position:relative;overflow:hidden}.spot-scene-item{cursor:pointer;background:0 0;border:none;padding:0;position:absolute}.spot-scene-item:before{content:"";position:absolute;inset:-20%}.spot-scene-item:disabled{cursor:default}.spot-scene-item-inner{width:100%;height:100%;display:block}.spot-scene-item-inner img{object-fit:contain;pointer-events:none;width:100%;height:100%;display:block}.spot-scene-item-inner.wrong{animation:.35s spot-shake}.spot-bg-area{cursor:pointer;background:0 0;border:none;padding:0;position:absolute}.spot-bg-area:disabled{cursor:default}.spot-found-ring{border:3px solid var(--color-success);pointer-events:none;border-radius:50%;position:absolute;inset:-14%;box-shadow:0 0 0 2px #fff}@keyframes spot-shake{0%,to{transform:translate(0)}25%{transform:translate(-6px)}75%{transform:translate(6px)}}.oddoneout-layout{--head-h:clamp(136px, 22vh, 210px);flex-direction:column;flex:1 1 0;gap:clamp(6px,1.2vh,14px);width:100%;min-height:0;display:flex}.quiz-head{height:var(--head-h,clamp(124px, 19vh, 190px));flex-direction:column;flex:none;justify-content:center;display:flex;overflow:hidden}.quiz-head .feedback-banner{font-size:calc(clamp(14px, 2.2vh, 20px) * var(--head-fit,1))}.quiz-head .feedback-banner.correct{font-size:calc(clamp(18px, 3.4vh, 30px) * var(--head-fit,1))}.quiz-head .explanation-text{font-size:calc(clamp(12px, 1.9vh, 16px) * var(--head-fit,1))}.quiz-head .character-portrait.quiz-feedback-portrait,.quiz-head .quiz-prompt .character-portrait{width:calc(min(var(--head-h,120px) * .6, 16vw) * var(--head-fit,1))}.quiz-prompt{justify-content:center;align-items:center;gap:clamp(6px,2vw,12px);width:100%;display:flex}.quiz-prompt-speaker{flex-shrink:0}.quiz-prompt-bubble{border-radius:var(--radius-md);background:var(--color-paper);min-width:0;box-shadow:var(--shadow-card);color:var(--color-text);font-size:calc(min(clamp(15px, 3vh, 26px), 4.8vw) * var(--head-fit,1));text-align:center;flex:0 auto;margin:0;padding:clamp(6px,1.3vh,12px) clamp(12px,3.6vw,20px);font-weight:800}.quiz-layout{--head-h:clamp(124px, 19vh, 190px);--zone-gap:clamp(6px, 1.2vh, 14px);gap:var(--zone-gap);flex-direction:column;flex:1 1 0;width:100%;min-height:0;display:flex;container-type:size}.quiz-layout--long-explanation{--head-h:clamp(140px, 21vh, 210px)}.quiz-layout--short-head{--head-h:clamp(104px, 16vh, 156px)}.quiz-layout--fit{--stimulus-max:calc((100cqh - var(--head-h) - 2 * var(--zone-gap)) * .6)}.quiz-layout--fit .quiz-stimulus{flex:none;container-type:inline-size}.quiz-layout--fit .quiz-answers{flex:1 1 0}.quiz-stimulus{flex:var(--stimulus-share,11) 1 0;justify-content:center;align-items:center;width:100%;min-height:0;display:flex;position:relative;container-type:size}.quiz-answers{flex:var(--answers-share,9) 1 0;width:100%;min-height:0;display:flex;container-type:size}.choice-grid--fill{grid-template-rows:repeat(2,minmax(0,1fr));gap:clamp(8px,3cqw,16px);max-width:none;height:100%}.choice-grid--fill .choice-button{min-width:0;min-height:0;font-size:var(--choice-font);white-space:nowrap;line-height:1.1}.choice-emoji{font-size:min(32cqh,30cqw);line-height:1}.quiz-stimulus .arithmetic-stimulus{justify-content:center;align-items:center;gap:calc(var(--stimulus-max) * .04);flex-direction:column;width:100%;display:flex}.apple-rows{align-items:center;gap:calc(var(--stimulus-max) * .03);flex-direction:column;display:flex}.apple-row{justify-content:center;align-items:center;display:flex}.apple{font-size:var(--apple);line-height:1}.apple.removed{opacity:.25}.apple-plus{font-size:calc(var(--apple) * .8);color:var(--color-primary-dark);padding:0 .15em;font-weight:800;line-height:1}.quiz-stimulus .equation-text{font-size:min(calc(var(--stimulus-max) * .3), 17cqw);line-height:1.1}.quiz-stimulus .story-text{font-size:min(calc(var(--stimulus-max) * .1), 6.4cqw);max-width:none;margin:0}.quiz-stimulus .opposite-prompt-word{font-size:min(calc(var(--stimulus-max) * .5), calc(76cqw / var(--len)));padding:calc(var(--stimulus-max) * .06) 6cqw}.quiz-stimulus .pattern-visual-row{--cell:min(calc((var(--stimulus-max) - 8px) / 2), 16.5cqw);width:calc(var(--cell) * 5 + 8px * 4);touch-action:auto;flex-wrap:wrap;padding:0;overflow:visible}.quiz-stimulus .pattern-visual-item{width:var(--cell);height:var(--cell);font-size:calc(var(--cell) * .86);justify-content:center;align-items:center;display:flex}.quiz-stimulus .pattern-slot{min-width:0;min-height:0}.counting-stage{--gap:3cqw;--card:min((100cqw - (var(--cols) - 1) * var(--gap)) / var(--cols), (var(--stimulus-max) - (var(--rows) - 1) * var(--gap)) / var(--rows));justify-content:center;align-items:center;width:100%;display:flex;position:relative}.counting-cards{justify-content:center;gap:var(--gap);width:calc(var(--card) * var(--cols) + var(--gap) * (var(--cols) - 1));flex-wrap:wrap;display:flex}.counting-card{width:var(--card);height:var(--card);padding:calc(var(--card) * .05);border:3px solid var(--color-primary-soft);border-radius:var(--radius-md);background:var(--color-paper);box-shadow:0 4px 0 var(--color-border), var(--shadow-card);animation:.18s cubic-bezier(.34,1.56,.64,1) backwards nakama-pop;animation-delay:calc(var(--i) * 80ms);position:relative}.counting-card-photo{border-radius:calc(var(--radius-md) - 8px);width:100%;height:100%;display:block;overflow:hidden}.counting-card-photo .word-icon{object-fit:cover;border-radius:0;width:100%;height:100%;display:block}.counting-tag{width:max(22px, calc(var(--card) * .26));height:max(22px, calc(var(--card) * .26));background:var(--color-accent);box-shadow:0 2px 0 var(--color-accent-dark);color:var(--color-text);font-size:max(13px, calc(var(--card) * .15));border-radius:50%;justify-content:center;align-items:center;font-weight:800;display:flex;position:absolute;bottom:-4%;right:-4%}.counting-number{top:calc(var(--card) * -.08);z-index:1;width:max(40px, calc(var(--card) * .4));height:max(40px, calc(var(--card) * .4));border:4px solid var(--color-paper);background:var(--color-primary);box-shadow:var(--shadow-card);color:#fff;font-size:max(24px, calc(var(--card) * .26));border-radius:50%;justify-content:center;align-items:center;font-weight:800;display:flex;position:absolute;left:0;rotate:-8deg}.oddoneout-board{flex:1 1 0;justify-content:center;align-items:flex-end;width:100%;min-height:0;display:flex;container-type:size}.nakama-grid{aspect-ratio:1;grid-template-rows:repeat(2,minmax(0,1fr));grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(8px,2.6cqw,16px);width:min(100cqw,100cqh);display:grid}.nakama-card{border:3px solid var(--color-primary-soft);border-radius:var(--radius-md);background:var(--color-paper);min-width:0;min-height:0;box-shadow:0 4px 0 var(--color-border), var(--shadow-card);cursor:pointer;animation:.16s cubic-bezier(.34,1.56,.64,1) backwards nakama-pop;animation-delay:calc(var(--i) * 40ms);padding:clamp(4px,1.6cqw,8px);position:relative}.nakama-card-photo{border-radius:calc(var(--radius-md) - 8px);width:100%;height:100%;display:block;overflow:hidden}.nakama-card-photo .word-icon{object-fit:cover;border-radius:0;width:100%;height:100%;display:block}.nakama-card-caption{pointer-events:none;flex-direction:column;align-items:center;gap:2px;display:flex;position:absolute;bottom:clamp(6px,2cqw,12px);left:6px;right:6px}.nakama-card-name{max-width:100%;color:var(--color-text);white-space:nowrap;text-overflow:ellipsis;background:#ffffffeb;border-radius:999px;padding:1px 8px;font-size:clamp(10px,4.2cqw,20px);font-weight:800;overflow:hidden}.nakama-card-badge{background:var(--color-primary);color:#fff;text-align:center;border-radius:8px;max-width:100%;padding:1px 6px;font-size:clamp(9px,3.4cqw,15px);font-weight:800;line-height:1.2}.nakama-card.is-odd .nakama-card-badge{background:var(--color-accent-dark)}.nakama-card.is-odd{border-color:var(--color-success);box-shadow:0 0 0 3px var(--color-success), 0 4px 0 var(--color-border), var(--shadow-card)}.nakama-card.is-wrong-pick{border-color:var(--color-error);box-shadow:0 0 0 3px var(--color-error), 0 4px 0 var(--color-border), var(--shadow-card)}.nakama-grid.is-answered .nakama-card.is-mate{animation:.5s ease-out both nakama-hop}.nakama-grid.is-answered .nakama-card.is-missed{animation:.6s ease-in-out both nakama-wobble}.nakama-card-stamp{aspect-ratio:1;pointer-events:none;width:42%;animation:.35s cubic-bezier(.34,1.56,.64,1) both nakama-stamp;position:absolute;top:2%;right:2%}@keyframes nakama-pop{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:none}}@keyframes nakama-hop{0%,to{transform:none}35%{transform:translateY(-9%)}65%{transform:translateY(0)scaleY(.94)}}@keyframes nakama-wobble{0%,to{transform:none}20%{transform:rotate(-6deg)}40%{transform:rotate(5deg)}60%{transform:rotate(-4deg)}80%{transform:rotate(2deg)}}@keyframes nakama-stamp{0%{opacity:0;transform:scale(2)rotate(-30deg)}to{opacity:1;transform:rotate(-12deg)}}.sudoku-board{flex-direction:column;align-items:center;gap:clamp(8px,1.5vh,20px);display:flex}.sudoku-wrong-count{color:var(--color-error);background:var(--color-error-soft);border-radius:999px;padding:clamp(3px,1vh,6px) 18px;font-size:clamp(13px,2vh,18px);font-weight:800}.sudoku-grid{--sudoku-line-soft:color-mix(in srgb, var(--color-text) 25%, transparent);background:var(--color-paper);border:3px solid var(--color-text);border-radius:var(--radius-md);box-shadow:var(--shadow-card);grid-template-columns:repeat(4,1fr);display:grid;overflow:hidden}.sudoku-cell{background:var(--color-paper);cursor:default;border-style:none solid solid none;border-top-width:medium;border-top-color:currentColor;border-left-width:medium;border-left-color:currentColor;justify-content:center;align-items:center;width:clamp(44px,9vh,64px);height:clamp(44px,9vh,64px);padding:0;display:flex}.sudoku-cell-blank{cursor:pointer;background:var(--color-bg-soft)}.sudoku-cell.selected{box-shadow:inset 0 0 0 3px var(--color-primary), 0 0 0 3px var(--color-primary-soft)}.sudoku-cell.wrong{animation:.35s spot-shake}.sudoku-cell--classic{width:clamp(28px,8vw,44px);height:clamp(28px,8vw,44px)}.sudoku-digit{color:var(--color-text);font-size:clamp(14px,4vw,22px);font-weight:800}.sudoku-palette{flex-wrap:wrap;justify-content:center;gap:clamp(6px,1.5vh,14px);display:flex}.sudoku-palette--classic{gap:8px;max-width:280px}.sudoku-palette-item{border-radius:var(--radius-sm);background:var(--color-surface);width:clamp(40px,8vh,56px);height:clamp(40px,8vh,56px);box-shadow:var(--shadow-card);cursor:pointer;border:none;justify-content:center;align-items:center;padding:0;display:flex}.sudoku-palette-item--classic{width:44px;height:44px}.sudoku-palette-item:disabled{opacity:.5;cursor:default}.quiz-card>.money-board,.quiz-card>.sudoku-board{flex:1 1 0;justify-content:space-evenly;gap:clamp(4px,1vh,12px);width:100%;min-height:0;container-type:size}.quiz-card>.money-board .money-target{font-size:min(9cqh,14cqw);line-height:1.1}.quiz-card>.money-board .money-tray{max-width:none;min-height:13cqh}.quiz-card>.money-board .money-tray-empty{font-size:10cqh}.quiz-card>.money-board .money-tray-total{font-size:min(6cqh,7cqw)}.quiz-card>.money-board .money-palette{--coin:min(var(--coin-h), calc((100cqw - (var(--per-row) - 1) * 10px) / var(--per-row)));max-width:calc(var(--coin) * var(--per-row) + 10px * (var(--per-row) - 1));gap:10px}.quiz-card>.money-board .money-palette-item{width:var(--coin);height:var(--coin)}.quiz-card>.sudoku-board{--cell:min(calc((100cqw - 6px) / var(--n)), calc(58cqh / var(--n)));--key:min(17cqh, 20cqw)}.quiz-card>.sudoku-board--classic{--key:min(9cqh, 15cqw)}.quiz-card>.sudoku-board .sudoku-cell{width:var(--cell);height:var(--cell)}.quiz-card>.sudoku-board .sudoku-cell .sudoku-digit{font-size:calc(var(--cell) * .55)}.quiz-card>.sudoku-board .sudoku-palette-item{width:var(--key);height:var(--key)}.quiz-card>.sudoku-board .sudoku-palette-item .sudoku-digit{font-size:calc(var(--key) * .5)}.quiz-card>.sudoku-board--classic .sudoku-palette{max-width:calc(var(--key) * 5 + 8px * 4)}.number-pad{flex-direction:column;align-items:center;gap:clamp(8px,1.5vh,16px);display:flex}.number-pad-display{border-radius:var(--radius-md);background:var(--color-paper);min-width:140px;min-height:clamp(44px,7vh,56px);box-shadow:var(--shadow-card);color:var(--color-text);font-variant-numeric:tabular-nums;justify-content:center;align-items:center;padding:0 20px;font-size:clamp(24px,4vh,32px);font-weight:800;display:flex}.number-pad-grid{grid-template-columns:repeat(3,1fr);gap:clamp(6px,1.2vh,12px);display:grid}.number-pad-button{border-radius:var(--radius-sm);background:var(--color-surface);width:clamp(44px,7.5vh,56px);height:clamp(44px,7.5vh,56px);box-shadow:var(--shadow-card);color:var(--color-text);cursor:pointer;border:none;justify-content:center;align-items:center;padding:0;font-size:clamp(18px,3vh,24px);font-weight:800;display:flex}.number-pad-button:disabled{opacity:.5;cursor:default}.number-pad-submit{background:var(--color-primary);color:#fff}.money-board{flex-direction:column;align-items:center;gap:clamp(6px,1.5vh,16px);display:flex}.money-wrong-count{color:var(--color-error);background:var(--color-error-soft);border-radius:999px;padding:clamp(2px,1vh,6px) 18px;font-size:clamp(13px,2vh,18px);font-weight:800}.money-target{color:var(--color-primary-dark);font-variant-numeric:tabular-nums;font-size:clamp(24px,5vh,40px);font-weight:800}.money-tray{border-radius:var(--radius-md);background:var(--color-bg-soft);width:100%;max-width:400px;min-height:clamp(44px,9vh,72px);box-shadow:inset 0 0 0 2px var(--color-accent-soft);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;padding:clamp(6px,1.5vh,12px);display:flex}.money-tray-empty{opacity:.4;font-size:clamp(20px,4vh,32px)}.money-tray-total{color:var(--color-text);font-variant-numeric:tabular-nums;font-size:clamp(15px,2.6vh,22px);font-weight:800}.money-palette{flex-wrap:wrap;justify-content:center;gap:clamp(6px,1.5vh,14px);display:flex}.money-palette-item{border-radius:var(--radius-sm);background:var(--color-surface);width:clamp(46px,9vh,72px);height:clamp(46px,9vh,72px);box-shadow:var(--shadow-card);cursor:pointer;border:none;justify-content:center;align-items:center;padding:0;display:flex}.money-palette-item:disabled{opacity:.5;cursor:default}.money-palette-item.wrong{animation:.35s spot-shake}.top-bar-home{flex-wrap:nowrap}.top-bar-home .app-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-size:min(clamp(18px,3.2vh,30px),5.4vw,14.2857vw - 30.5714px);overflow:hidden}:lang(en) .top-bar-home .app-title{font-size:min(clamp(18px,3.2vh,30px),5.4vw,12.8205vw - 27.4359px)}.top-bar-controls{flex-shrink:0;align-items:center;gap:6px;display:flex}.language-toggle{background:var(--color-surface);height:44px;box-shadow:var(--shadow-card);cursor:pointer;white-space:nowrap;border:none;border-radius:999px;align-items:center;gap:4px;padding:0 10px;font-size:20px;display:flex}.language-toggle span{opacity:.35;filter:grayscale(.8)}.language-toggle span.is-active{opacity:1;filter:none}.language-toggle .language-toggle-slash{color:var(--color-text-soft);filter:none;font-size:16px;font-weight:700}.icon-button.icon-button-small{width:44px;height:44px;font-size:22px}.icon-button-off{opacity:.45;filter:grayscale()}.icon-button{background:var(--color-surface);width:56px;height:56px;box-shadow:var(--shadow-card);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:26px;display:flex}.feedback-banner{border-radius:var(--radius-md);text-align:center;padding:clamp(6px,1.3vh,12px) 20px;font-size:clamp(15px,2.6vh,28px);font-weight:800}.feedback-banner.correct{color:#2f8f5b;background:var(--color-success-soft);animation:.45s cubic-bezier(.34,1.56,.64,1) correct-pop}.correct-celebration{pointer-events:none;z-index:50;position:fixed;inset:0;overflow:hidden}.correct-celebration-center{width:0;height:0;position:absolute;top:42%;left:50%}.correct-hanamaru{filter:drop-shadow(0 6px 14px #ff5c9d59);width:clamp(140px,26vh,220px);height:clamp(140px,26vh,220px);position:absolute;top:calc(clamp(140px,26vh,220px)/-2);left:calc(clamp(140px,26vh,220px)/-2)}.correct-burst-piece{position:absolute;top:-6px;left:-6px}.correct-streak-ribbon{white-space:nowrap;color:#fff;background:linear-gradient(90deg,#ff7eb6,#ffb36b);border-radius:999px;padding:6px 18px;font-size:clamp(16px,2.8vh,24px);font-weight:900;position:absolute;top:calc(clamp(140px,26vh,220px)/2 + 6px);left:0;translate:-50%;box-shadow:0 4px 12px #ff5c9d59}.feedback-banner.incorrect{color:#c65f4b;background:var(--color-error-soft)}.explanation-text{white-space:pre-line;color:var(--color-text-soft);text-align:center;max-width:640px;margin:0;font-size:clamp(13px,2.2vh,18px);font-weight:700;line-height:1.35}.explanation-media{justify-content:center;align-items:center;gap:clamp(8px,2vw,16px);max-width:640px;display:flex}.explanation-media .explanation-text{text-align:left;max-width:none}.progress-row{width:100%;max-width:600px;color:var(--color-text-soft);justify-content:space-between;font-weight:700;display:flex}.stat-row{flex-direction:column;gap:8px;width:100%;display:flex}.stat-bar-track{background:var(--color-bg-soft);border-radius:999px;width:100%;height:18px;overflow:hidden}.stat-bar-fill{background:var(--color-primary);border-radius:999px;height:100%}.handwriting-board{flex-direction:column;align-items:center;gap:clamp(10px,2vh,20px);display:flex}.handwriting-canvas-stack{border-radius:var(--radius-lg);background:var(--color-paper);box-shadow:var(--shadow-card);position:relative;overflow:hidden}.handwriting-canvas{touch-action:none;position:absolute;top:0;left:0}.handwriting-canvas-ink{cursor:crosshair}.handwriting-controls{gap:clamp(8px,1.5vh,16px);display:flex}.handwriting-praise{flex-direction:column;flex:1 0 auto;align-items:center;gap:clamp(6px,1.5vh,12px);width:100%;display:flex}.handwriting-praise>:first-child,.handwriting-praise>.next-button{margin-top:auto}.handwriting-stars{color:var(--color-accent);letter-spacing:4px;font-size:clamp(30px,6vh,48px)}.handwriting-praise-text{color:var(--color-text);font-size:clamp(18px,3.2vh,24px);font-weight:800}.handwriting-case-badge{color:#fff;border-radius:999px;align-items:center;padding:clamp(6px,1.5vh,10px) 26px;font-size:clamp(15px,2.8vh,20px);font-weight:800;display:inline-flex}.handwriting-case-badge--upper{background:var(--color-primary-dark)}.handwriting-case-badge--lower{background:var(--color-accent);color:var(--color-text)}.kanji-trace-canvas-stack{border-radius:var(--radius-lg);background:var(--color-paper);box-shadow:var(--shadow-card);transition:box-shadow .15s;position:relative;overflow:hidden}.kanji-trace-canvas-stack--mistake{box-shadow:0 0 0 4px #ff6b6b, var(--shadow-card)}.kanji-trace-svg{pointer-events:none;width:100%;height:100%;display:block}.kanji-trace-overlay{touch-action:none;cursor:crosshair;position:absolute;inset:0}.kanji-trace-stroke{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:7px}.kanji-trace-stroke--pending{stroke:var(--color-text);opacity:.22}.kanji-trace-stroke--current{stroke:var(--color-accent);stroke-dasharray:5 6;opacity:.95;animation:.9s linear infinite kanji-trace-current-march}@keyframes kanji-trace-current-march{to{stroke-dashoffset:-22px}}.kanji-trace-stroke--done{stroke:var(--color-primary-dark);opacity:1}.kanji-trace-ink{fill:none;stroke:var(--color-primary-dark);stroke-width:6px;stroke-linecap:round;stroke-linejoin:round}.trace-progress{background:var(--color-surface);box-shadow:var(--shadow-card);color:var(--color-primary-dark);font-variant-numeric:tabular-nums;border-radius:999px;margin:0;padding:2px 14px;font-size:clamp(13px,2vh,16px);font-weight:800}.kanji-meaning-link{flex-wrap:wrap;justify-content:center;align-items:center;gap:clamp(8px,2vw,16px);display:flex}.kanji-meaning-char{font-family:"BIZ UDGothic", var(--font-family);color:var(--color-text);font-size:clamp(56px,12vh,104px);font-weight:700;line-height:1}.kanji-meaning-char--word{font-family:var(--font-family);letter-spacing:.02em;font-size:clamp(30px,6.5vh,56px);font-weight:800}.kanji-meaning-equals{color:var(--color-text-soft);font-size:clamp(22px,4vh,34px);font-weight:800}.kanji-review-sentence{color:var(--color-text);text-align:center;max-width:320px;font-size:clamp(16px,3vh,22px);font-weight:700}.word-trace-progress{letter-spacing:2px;gap:4px;font-size:clamp(22px,4.5vh,32px);font-weight:800;display:flex}.word-trace-letter--done{color:var(--color-primary-dark)}.word-trace-letter--current{color:var(--color-accent);text-decoration:underline}.word-trace-letter--pending{color:var(--color-text-soft);opacity:.4}.word-icon{width:var(--icon-size);height:var(--icon-size);object-fit:contain;border-radius:16px}.quiz-progress-stars{flex-wrap:wrap;justify-content:center;gap:2px;max-width:100%;display:flex}.quiz-progress-star{color:var(--color-primary-soft);font-size:clamp(18px,3vh,26px);line-height:1;transition:color .2s}.quiz-progress-star.is-current{color:var(--color-primary);animation:1.2s ease-in-out infinite progress-star-pulse}.quiz-progress-star.is-correct{color:var(--color-primary-dark);text-shadow:0 0 6px #ffd166e6;animation:.4s cubic-bezier(.34,1.56,.64,1) progress-star-pop}.quiz-progress-star.is-missed{color:#c9b8c2}@keyframes progress-star-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.18)}}@keyframes progress-star-pop{0%{transform:scale(.3)rotate(-40deg)}70%{transform:scale(1.4)rotate(10deg)}to{transform:none}}.peeking-mascot{pointer-events:none;z-index:40;width:clamp(64px,11vh,96px);animation:.9s ease-in-out mascot-peek;position:fixed;bottom:0;right:10px;translate:0 100%}@keyframes mascot-peek{0%{translate:0 100%;rotate:0deg}28%{translate:0 35%;rotate:-8deg}50%{translate:0 38%;rotate:6deg}72%{translate:0 35%;rotate:-4deg}to{translate:0 100%;rotate:0deg}}.choice-button.incorrect{animation:.35s spot-shake}.choice-button.incorrect:disabled{opacity:1}.result-stars{flex-wrap:wrap;justify-content:center;gap:4px;display:flex}.result-star{color:#0000;-webkit-text-stroke:2px #ff7eb659;font-size:clamp(22px,4vh,34px);line-height:1}.result-star.is-landed{color:#ffc93c;-webkit-text-stroke:2px #ff8fb8;filter:drop-shadow(0 0 6px #ffc93cb3);animation:.35s cubic-bezier(.34,1.56,.64,1) result-star-land}@keyframes result-star-land{0%{opacity:0;transform:translateY(-40px)scale(.4)rotate(-90deg)}70%{opacity:1;transform:translateY(2px)scale(1.25)rotate(10deg)}to{transform:none}}.portrait-blink{object-fit:contain;pointer-events:none;opacity:0;width:100%;height:100%;animation-name:portrait-blink;animation-timing-function:step-end;animation-iteration-count:infinite;position:absolute;inset:0}@keyframes portrait-blink{0%,96%{opacity:0}97%,99%{opacity:1}to{opacity:0}}.result-hero{justify-content:center;align-items:center;gap:clamp(4px,2vw,16px);display:flex}.card-panel .result-streak{color:var(--color-primary-dark);font-weight:700}.parent-gate-form{flex-direction:column;align-items:center;gap:16px;display:flex}.parent-gate-input{border-radius:var(--radius-md);border:2px solid var(--color-primary-soft);text-align:center;width:160px;padding:12px 20px;font-size:28px}.card-panel .parent-gate-error{color:var(--color-error)}.card-panel.progress-panel{text-align:left}.credits-title{color:var(--color-text);margin:0;font-size:16px}.credits-panel p{color:var(--color-text-soft);font-size:13px}