*{box-sizing:border-box}html,body,#app{margin:0;width:100%;height:100%;font-family:'Arial Rounded MT Bold',system-ui,sans-serif;color:#07276a}body{overflow:hidden;background:#8addff}button,a,input{-webkit-tap-highlight-color:transparent}button,input{font:inherit;color:inherit}button{cursor:pointer;font-weight:900;touch-action:manipulation;border:0}button:focus-visible,a:focus-visible{outline:4px solid #7c3cec;outline-offset:4px}button:active{translate:0 2px}button:disabled{cursor:default;opacity:.6}.screen{height:100dvh;min-height:0;overflow:hidden;padding:clamp(10px,2vh,24px) clamp(12px,2.4vw,42px);background:url('assets/landscape-light-v2.webp') center/cover;display:flex;flex-direction:column;gap:clamp(6px,1.2vh,14px)}header{position:relative;flex:none;min-height:54px;display:flex;align-items:center;justify-content:center}.tool{width:clamp(44px,5.3vw,72px);height:clamp(44px,5.3vw,72px);display:grid;place-items:center;border-radius:24%;background:linear-gradient(#11bdff,#0073e9 60%,#0054b7);border:3px solid white;color:white;box-shadow:inset 0 0 0 3px #3bbcff,0 5px 0 #428ec866,0 8px 15px #00559c38;font-size:30px;text-decoration:none}.tool svg{width:60%;height:60%;fill:currentColor;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}.home{position:absolute;left:0;top:0;border-radius:50%}.tools{position:absolute;right:0;top:0;display:flex;gap:8px}.tools .music-toggle,.tools .exit{width:44px;height:44px;font-size:26px;border-width:2px}
/* Live text title: no screenshot backgrounds or image cropping. */
.logo{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:0 .25em;font-weight:1000;line-height:1.06;letter-spacing:-.035em;text-transform:uppercase;color:#fff;font-size:clamp(26px,3.1vw,48px);text-shadow:0 3px 0 #0060be,0 6px 0 #004f9c,0 9px 12px #00588e55;-webkit-text-stroke:1px #07509c;paint-order:stroke fill}.logo span{color:#ffdb36}.logo strong{font-weight:1000}.menu{background:radial-gradient(ellipse at 50% 42%,#e2faff,#a2e4ff 65%,#62c9fa);gap:clamp(6px,1.4vh,18px)}.menu header{height:clamp(105px,19vh,200px);align-items:flex-end}.menu .logo{font-size:clamp(38px,5.2vw,78px);max-width:75%;flex-direction:column;gap:0}.menu .logo strong{font-size:.83em}.tagline{margin:0;text-align:center;font-weight:900;font-size:clamp(19px,2vw,29px);color:#07508b}.levels{display:flex;align-items:center;justify-content:center;gap:clamp(7px,1vw,18px);border:3px solid white;background:#e3f5ffe6;border-radius:60px;width:max-content;max-width:100%;margin:4px auto 0;padding:8px 22px;box-shadow:0 5px 15px #1788b333;font-size:clamp(20px,2vw,30px);flex:none}.levels button{height:clamp(44px,4.4vw,62px);width:clamp(44px,4.4vw,62px);border:2px solid #bbdeff;background:white;border-radius:50%;font-size:clamp(24px,2.5vw,36px)}.levels .active{background:linear-gradient(#07b9ff,#0075ee);color:white}.level-caption{margin:0;text-align:center;font-size:clamp(15px,1.5vw,20px);font-weight:800;flex:none}.mode-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,3vw,45px);width:min(94%,1120px);margin:auto;min-height:0;flex:1;padding:12px 0;align-items:center}.mode-card{border-radius:clamp(24px,3vw,40px);padding:clamp(12px,2vh,25px);min-width:0;min-height:0;height:100%;max-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(6px,1vh,14px);border:4px solid #ffcf2b;background:linear-gradient(#fffdf4,#fff0bc);box-shadow:inset 0 3px 0 white,0 7px 0 #d2a91950,0 14px 25px #005d9626;transition:translate .15s,box-shadow .15s}.mode-card:hover{translate:0 -4px;box-shadow:inset 0 3px 0 white,0 10px 0 #d2a91950,0 18px 28px #005d9633}.card-missing{border-color:#12ccb3;background:linear-gradient(#f1fffc,#c6fff1);box-shadow:inset 0 3px white,0 7px 0 #009c8d44,0 14px 25px #005d9626}.card-picture{display:block;width:100%;height:clamp(100px,24vh,260px);min-height:0;object-fit:contain;flex:1}.mode-name{font-size:clamp(25px,2.7vw,40px);line-height:1.12;padding:8px 10px;flex:none;text-align:center}.mode-description{font-size:clamp(15px,1.4vw,20px);line-height:1.35;font-weight:700;text-align:center;flex:none;max-width:95%}
.blue,.green,.soft{border-radius:clamp(16px,2vw,30px);padding:10px 26px;min-height:46px;border:3px solid #b1eaff;font-size:clamp(20px,2.5vw,35px);font-weight:900;box-shadow:inset 0 3px 2px #ffffff77,0 5px 0 #005baa55,0 8px 13px #004e9130}.blue{background:linear-gradient(#12c2ff,#008af4 45%,#0063d9);color:white;text-shadow:0 3px 0 #0053a0}.green{background:linear-gradient(#21ed87,#04c85e 60%,#00a34c);color:white;border-color:#80ffbd;text-shadow:0 2px 0 #008e42}.soft{background:linear-gradient(white,#dbf0ff);border-color:white;font-size:clamp(18px,1.8vw,27px)}.game header{height:clamp(60px,9vh,95px)}.game .logo{max-width:50%;font-size:clamp(23px,2.6vw,40px)}.progress{display:flex;flex-direction:column;align-items:center;margin-top:-4px;flex:none;font-size:clamp(16px,1.8vw,25px);font-weight:900}.track{position:relative;display:flex;justify-content:space-between;align-items:center;width:clamp(240px,30vw,480px);padding:6px 25px;border:2px solid white;background:#e4f6ffe8;border-radius:40px}.track:before{content:'';height:5px;background:#7fb7de;position:absolute;left:30px;right:30px}.track i{z-index:1;background:#6cadd8;border:2px solid white;width:clamp(20px,2.3vw,34px);height:clamp(20px,2.3vw,34px);border-radius:50%;box-shadow:0 2px 3px #174c9444}.track .done{background:#078dff}.track .current{background:#ffcf28;box-shadow:0 0 0 3px #fff3aa}.progress>span{background:#e8f7ff;padding:1px 24px;border-radius:0 0 18px 18px}.instruction{margin:0 auto;padding:7px 24px;width:max-content;max-width:95%;border:3px solid #fff5b2;border-radius:50px;background:linear-gradient(#ffe963,#ffce21);box-shadow:inset 0 3px 3px #fffaa5,0 6px 0 #b7911733,0 10px 17px #448eac44;font-size:clamp(23px,3.3vw,47px);text-align:center;font-weight:900;flex:none}.game-body{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(240px,1fr);gap:clamp(10px,1.5vw,24px);flex:1;min-height:0;margin:2px 2vw 0}.work{background:linear-gradient(#ffffffef,#e1f3fff0);border:4px solid white;border-radius:clamp(24px,3vw,45px);box-shadow:inset 0 -6px #bae2f444,0 8px 15px #077ba833;min-width:0;min-height:0;padding:clamp(8px,1.3vw,20px);display:flex;align-items:center;flex-direction:column;gap:clamp(4px,.7vh,10px)}.math-panel{width:100%;flex:1;min-height:0;display:grid;place-items:center;border-radius:25px;box-shadow:0 6px 0 #b6dcf366;background:#fff;container-type:inline-size}.equation{display:flex;justify-content:center;align-items:center;white-space:nowrap;font-size:clamp(26px,calc(135cqw / var(--len)),85px);font-weight:900;gap:.12em;max-width:100%;padding:8px}.branch,.group{display:inline-flex;align-items:center;gap:.1em;white-space:nowrap}.group>span{display:inline-flex}.branch.selected{background:#fff2a1;border-radius:20px;box-shadow:0 0 0 4px #ffe278}.operator{background:transparent;min-width:44px;min-height:44px;font-size:inherit;line-height:1.25;padding:0 .06em;border-radius:12px}.operator:hover{background:#e4f4ff}.selected>.operator{background:#ffdc45}.blank{display:inline-grid;place-items:center;min-width:1em;border:3px dashed #0a93ec;background:#e5f6ff;border-radius:12px}.answer-label{font-weight:900;font-size:clamp(16px,1.65vw,25px);text-align:center}.answer{height:clamp(48px,8vh,90px);width:65%;border:4px solid #0098ff;background:white;border-radius:20px;font-size:clamp(30px,4vw,55px);font-weight:900;text-align:center;box-shadow:inset 0 3px 6px #1976c51c,0 4px 5px #087fc033;min-height:44px}.feedback{font-size:clamp(15px,1.35vw,20px);font-weight:800;text-align:center;margin:0;min-height:1.45em;line-height:1.3}.feedback.good{color:#087d3b}.history{color:#476589;font-size:clamp(14px,1.4vw,20px);min-height:0;text-align:center}.history:empty{display:none}.keypad{display:grid;grid-template:repeat(4,minmax(0,1fr))/repeat(3,minmax(0,1fr));gap:clamp(7px,1vw,16px);border:3px solid white;border-radius:35px;padding:clamp(10px,1.2vw,20px);background:linear-gradient(#d6f5ffeb,#ace5ffeb);box-shadow:0 7px 0 #0086b333;min-height:0}.keypad button{border-radius:clamp(14px,1.7vw,25px);background:linear-gradient(white,#eaf7ff);border:2px solid #b3d5eb;font-size:clamp(30px,4.7vw,70px);line-height:1;box-shadow:inset 0 2px white,0 4px 2px #699bb347;min-height:44px}.keypad .green{background:linear-gradient(#13e984,#00bd58);color:white;border-color:#00b956}.keypad button[data-key="⌫"]{background:#e4e7f2;color:#44638f}.game footer{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:45px;flex:none}.help{display:flex;align-items:center;gap:10px;white-space:nowrap}.help svg{width:30px;height:32px;fill:#ffd32e;stroke:#e9a71a;stroke-width:2}.rules{display:flex;justify-content:center;gap:12px;font-size:clamp(17px,1.7vw,24px);font-weight:900}.rules span{background:linear-gradient(white,#e0f2ff);border:2px solid white;padding:7px 18px;border-radius:24px;box-shadow:0 4px 0 #699aba33}.mode-label{font-size:14px;font-weight:900;max-width:180px;text-align:right}.panel{border:4px solid white;border-radius:35px;background:linear-gradient(white,#e2f3ff);padding:25px;box-shadow:0 9px 17px #077ba833}.next{font-size:clamp(20px,2vw,30px);padding:7px 25px;flex:none}.finish{align-items:center}.finish header{align-self:stretch;min-height:90px}.finish .logo{max-width:50%}.finish-panel{margin:auto;max-width:850px;text-align:center;position:relative;z-index:2}.finish h1{font-size:clamp(28px,4vw,58px);margin:5px}.finish p{font-size:22px}.stars{font-size:clamp(40px,6vw,85px);color:#ffcc23;text-shadow:0 4px #da8f11}.summary{display:flex;justify-content:center;gap:30px}.summary span{display:flex;flex-direction:column;font-size:16px}.summary strong{font-size:34px}.finish-panel button{margin:6px;font-size:22px}.celebration{position:absolute;inset:0;pointer-events:none;overflow:hidden}.celebration i{position:absolute;left:calc(var(--i)*4.3%);top:-20px;width:12px;height:24px;background:#ffc923;animation:fall 3s calc(var(--i)*-.17s) infinite;rotate:calc(var(--i)*20deg)}.celebration i:nth-child(3n){background:#08d7b2}.celebration i:nth-child(3n+1){background:#ff6c7a}.hint{outline:4px dashed #ffbf14;border-radius:10px}.shake{animation:shake .3s}.pop{animation:pop .3s}@keyframes shake{25%{translate:-6px}75%{translate:6px}}@keyframes pop{50%{opacity:.65;translate:0 -5px}}@keyframes fall{to{translate:0 110vh;rotate:340deg}}
@media(max-height:650px) and (orientation:landscape){.screen{padding:8px 16px;gap:6px}.game header{height:50px}.tools .tool{width:44px;height:44px}.progress{margin-top:0}.track{padding:3px 20px}.track i{width:20px;height:20px}.progress>span{font-size:15px}.instruction{font-size:27px;padding:4px 22px}.work{padding:8px;gap:4px}.answer{height:48px}.feedback{font-size:15px}.game footer{min-height:44px}.rules span{padding:5px 12px}.mode-label{display:none}.menu header{height:105px}.menu .logo{font-size:43px}.tagline{font-size:18px}.levels{padding:4px 18px}.mode-cards{padding:8px 0}.card-picture{height:120px}.mode-name{font-size:27px;padding:3px}.mode-description{font-size:15px}}
@media(max-width:1100px){.tools{gap:5px}.tools .tool{width:44px;height:44px}.game .logo{max-width:46%;font-size:24px}.rules{gap:7px}.rules span{padding:7px 11px}.mode-label{display:none}}
@media(max-width:700px),(orientation:portrait){body{overflow:auto}.screen{height:auto;min-height:100dvh;overflow:visible}.menu{gap:12px}.menu header{height:180px;align-items:flex-end}.menu .logo{max-width:100%;font-size:clamp(34px,8.5vw,60px)}.tagline{font-size:20px}.mode-cards{display:flex;flex-direction:column;gap:18px;width:95%;margin:0 auto;flex:none;padding:5px 0 14px}.mode-card{width:100%;height:auto;min-height:190px;max-height:none;padding:12px;gap:4px}.card-picture{height:105px;flex:none}.mode-name{font-size:25px;padding:4px}.mode-description{font-size:16px}.levels{gap:5px;padding:7px 10px}.levels strong{font-size:16px}.levels button{width:34px;height:44px;font-size:24px}.level-caption{font-size:14px}.game header{height:115px;padding-top:60px}.game .logo{max-width:100%;font-size:clamp(20px,5.5vw,30px)}.game-body{display:flex;flex-direction:column;margin:0;min-height:0}.work{min-height:285px}.math-panel{min-height:110px}.equation{font-size:clamp(20px,calc(135cqw / var(--len)),40px)}.operator{min-width:30px}.keypad{height:255px;border-radius:25px;gap:7px}.keypad button{font-size:32px}.instruction{font-size:23px;max-width:100%;padding:7px 14px}.answer{height:52px}.game footer{flex-wrap:wrap;justify-content:center;padding-bottom:8px}.rules{font-size:16px;gap:6px}.rules span{padding:7px 10px}.help{font-size:18px;padding:6px 15px}.finish header{height:110px;padding-top:60px}.finish .logo{max-width:100%;font-size:24px}.finish-panel{padding:18px}.summary{gap:12px}.summary span{font-size:14px}.finish p{font-size:18px}.finish-panel button{font-size:19px}.finish .tool{width:44px;height:44px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}