@import"https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&display=swap";:root{--font-kids: "Fredoka", system-ui, sans-serif;--transition-spring: all .35s cubic-bezier(.175, .885, .32, 1.275);--container-max-width: 600px;--pink-100: #fff0f6;--pink-200: #ffd6e8;--pink-300: #ffadd2;--pink-400: #ff85b8;--pink-500: #ff5d9e;--pink-600: #d6317a;--peach: #ffb5a7;--lavender: #e8d5f5;--mint: #d5f5e8;--yellow: #fff3b0;--shadow-card: 0 8px 32px rgba(255, 93, 158, .12);--shadow-btn: 0 6px 0 rgba(214, 49, 122, .3);--shadow-btn-secondary: 0 6px 0 #ffd6e8;--shadow-key: 0 7px 0 #ffc2d9}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}#root{width:100%;height:100%}body{font-family:var(--font-kids);background:url(/assets/bg-B-9mEbEB.png) center/cover no-repeat fixed;color:var(--pink-600);height:100%;width:100%;display:flex;justify-content:center;align-items:center;overflow:hidden}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;pointer-events:none;background:radial-gradient(circle at 15% 20%,rgba(255,182,193,.18) 0%,transparent 40%),radial-gradient(circle at 85% 75%,rgba(216,191,216,.15) 0%,transparent 40%),radial-gradient(circle at 50% 50%,rgba(255,255,255,.08) 0%,transparent 60%)}#app-viewport{width:100%;height:100%;max-height:100%;max-width:var(--container-max-width);margin:0 auto;display:flex;flex-direction:column;padding:12px 16px;position:relative;z-index:1;overflow:hidden}.card-shadow{background:#ffffffe0;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:32px;box-shadow:var(--shadow-card),0 1px #ffffffe6 inset;border:2px solid rgba(255,255,255,.7)}.screen-wrapper{display:flex;flex-direction:column;align-items:center;flex:1;overflow-y:auto;min-height:0;width:100%;padding-bottom:8px;-webkit-overflow-scrolling:touch;touch-action:pan-y}.title-glow{font-weight:700;color:var(--pink-500);text-align:center;font-size:2.4rem;margin-bottom:16px;letter-spacing:1px;text-shadow:3px 3px 0 rgba(255,255,255,.9),-1px -1px 0 rgba(255,255,255,.9),0 0 20px rgba(255,93,158,.25);animation:titlePop .6s cubic-bezier(.175,.885,.32,1.275)}@keyframes titlePop{0%{transform:scale(.7) rotate(-3deg);opacity:0}80%{transform:scale(1.05) rotate(1deg)}to{transform:scale(1) rotate(0);opacity:1}}.bouncy-button{font-family:var(--font-kids);font-weight:600;border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:50px;transition:var(--transition-spring);letter-spacing:.5px;position:relative;overflow:hidden}.bouncy-button:after{content:"";position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);transform:skew(-20deg);transition:left .5s}.bouncy-button:hover:after{left:150%}.bouncy-button:active{transform:scale(.93) translateY(3px)}.bouncy-button.primary{background:linear-gradient(160deg,#ff85b8,#ff5d9e,#e8448c);color:#fff;padding:15px 30px;font-size:1.2rem;box-shadow:var(--shadow-btn),0 0 0 3px #ff5d9e26;text-shadow:0 1px 2px rgba(0,0,0,.15)}.bouncy-button.primary:active{box-shadow:0 2px #d6317a4d,0 0 0 3px #ff5d9e26}.bouncy-button.secondary{background:#fff;color:var(--pink-600);padding:12px 20px;box-shadow:var(--shadow-btn-secondary);border:2.5px solid var(--pink-200)}.bouncy-button.secondary:active{transform:translateY(4px);box-shadow:0 2px #ffd6e8}.bouncy-button.mistake{background:linear-gradient(160deg,#ff6b9d,#c0392b);color:#fff;box-shadow:0 6px #c0392b59}.bouncy-button.mistake:active{box-shadow:0 2px #c0392b59;transform:translateY(4px)}.app-header{display:flex;justify-content:space-between;align-items:center;padding:4px 0 8px}.welcome-hero{position:relative;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;gap:0;padding:10px 0}.star-float{font-size:4.5rem;animation:starFloat 4s ease-in-out infinite;filter:drop-shadow(0 6px 16px rgba(255,200,0,.4));line-height:1}@keyframes starFloat{0%{transform:translateY(0) rotate(-5deg) scale(1)}30%{transform:translateY(-18px) rotate(5deg) scale(1.05)}60%{transform:translateY(-10px) rotate(-3deg) scale(1.02)}to{transform:translateY(0) rotate(-5deg) scale(1)}}.deco-emoji{position:absolute;font-size:1.8rem;animation:decoSpin 6s ease-in-out infinite;pointer-events:none}@keyframes decoSpin{0%,to{transform:rotate(-10deg) scale(.9)}50%{transform:rotate(10deg) scale(1.1)}}.welcome-card{background:#ffffffbf;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:28px;border:2.5px solid rgba(255,255,255,.85);box-shadow:0 10px 40px #ff5d9e1f,0 2px #ffffffe6 inset;padding:16px 20px;width:92%;max-width:360px;display:flex;flex-direction:column;gap:10px}.mode-badge{display:flex;gap:8px;align-items:center;justify-content:center;background:linear-gradient(135deg,#ffd5e6b3,#fff0f6b3);border:2px solid rgba(255,173,210,.5);border-radius:50px;padding:8px 18px;font-size:.98rem;font-weight:600;color:#c0487a;box-shadow:0 3px 10px #ff5d9e1a}.stats-row{display:flex;justify-content:center;gap:6px;font-size:.9rem;color:#c07090;font-weight:600;opacity:.8}.equation-container{display:flex;align-items:center;justify-content:center;font-weight:700;font-size:2.6rem;gap:10px;padding:12px 20px;background:linear-gradient(135deg,#ff85b8d9,#ff5d9ed9);border-radius:28px;flex-shrink:0;margin:6px 0;box-shadow:0 6px 20px #ff5d9e4d,0 1px #fff6 inset;color:#fff;text-shadow:2px 2px 0 rgba(200,0,80,.3);position:relative;animation:eqSlideIn .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes eqSlideIn{0%{transform:scale(.85) translateY(-10px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}.math-operator{background:#ffffff40;border-radius:50%;width:52px;height:52px;display:flex;align-items:center;justify-content:center;font-size:2rem;box-shadow:0 2px 8px #0000001a}.answer-box{background:#ffffff59;border:3px solid rgba(255,255,255,.8);border-radius:18px;min-width:70px;min-height:64px;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 3px 10px #0000001a,0 2px #fff9;color:#fff;font-size:2.6rem;transition:all .25s;animation:answerPulse 2s ease-in-out infinite}@keyframes answerPulse{0%,to{box-shadow:inset 0 3px 10px #0000001a,0 0 #fff6}50%{box-shadow:inset 0 3px 10px #0000001a,0 0 0 6px #fff3}}.manipulatives-area{display:flex;flex-direction:column;align-items:center;gap:8px;margin:4px 0;min-height:120px;touch-action:pan-y;flex-shrink:0}.items-row{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;touch-action:pan-y}.draggable-item{font-size:2.1rem;cursor:grab;-webkit-user-select:none;user-select:none;transition:transform .2s cubic-bezier(.175,.885,.32,1.275);filter:drop-shadow(0 4px 6px rgba(0,0,0,.15));touch-action:pan-y}.draggable-item:active{cursor:grabbing;transform:scale(1.25) rotate(8deg)}.draggable-item.used{opacity:.35;filter:grayscale(1) blur(1px)}.drop-zone{width:92%;min-height:90px;background:#ffffff8c;border:3px dashed var(--pink-300);border-radius:24px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;transition:all .3s;box-shadow:inset 0 4px 12px #ff5d9e14;flex-shrink:0;position:relative;touch-action:pan-y}.drop-zone:before{content:"🧺";position:absolute;top:-18px;left:50%;transform:translate(-50%);font-size:1.8rem;filter:drop-shadow(0 3px 4px rgba(0,0,0,.15))}.drop-zone.drag-over{background:#ffd5e6cc;border-color:var(--pink-400);transform:scale(1.02);box-shadow:0 0 0 4px #ff5d9e26,inset 0 4px 12px #ff5d9e1a}.keypad-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;max-width:360px;padding:4px 0;margin:0 auto;flex-shrink:0}.keypad-btn{aspect-ratio:2.1 / 1;font-family:var(--font-kids);font-weight:600;border:none;border-radius:16px;font-size:1.5rem;cursor:pointer;position:relative;overflow:hidden;transition:transform .1s cubic-bezier(.175,.885,.32,1.275),box-shadow .1s;background:linear-gradient(180deg,#fff,#fff0f6);color:var(--pink-600);box-shadow:0 4px #ffc2d9,inset 0 2px #fff}.keypad-btn:before{content:"";position:absolute;top:0;left:0;right:0;height:45%;border-radius:16px 16px 50% 50%/16px 16px 20px 20px;background:#ffffff8c;pointer-events:none}.keypad-btn:active{transform:translateY(3px);box-shadow:0 1px #ffc2d9,inset 0 2px #ffffffb3}.keypad-btn.action-clear{background:linear-gradient(180deg,#ffcba4,#ffb5a7);color:#fff;box-shadow:0 4px #e8957a,inset 0 2px #ffffff80;text-shadow:0 1px 2px rgba(0,0,0,.15)}.keypad-btn.action-clear:active{box-shadow:0 1px #e8957a,inset 0 2px #fff6}.keypad-btn.action-submit{background:linear-gradient(180deg,#ff85b8,#ff5d9e);color:#fff;box-shadow:0 4px #d6317a,inset 0 2px #fff6;text-shadow:0 1px 2px rgba(0,0,0,.15);font-size:1.4rem}.keypad-btn.action-submit:active{box-shadow:0 1px #d6317a,inset 0 2px #ffffff4d}.range-hint{font-size:.82rem;color:#c07090;opacity:.75;background:#fff9;border:1.5px solid rgba(255,173,210,.4);border-radius:50px;padding:4px 16px;align-self:center;font-weight:600;letter-spacing:.3px}.fade-in{animation:fadeIn .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px) scale(.94)}to{opacity:1;transform:translateY(0) scale(1)}}.correct-flash{animation:correctFlash .5s ease}@keyframes correctFlash{0%{background:#ffffff59}40%{background:#b4ffc8b3}to{background:#ffffff59}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#ff5d9e0d;border-radius:10px}::-webkit-scrollbar-thumb{background:var(--pink-300);border-radius:10px;border:2px solid transparent;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:var(--pink-400)}.challenge-list{display:flex;flex-direction:column;gap:16px;width:100%;max-width:500px;padding:10px}.challenge-item{background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:20px;padding:16px 20px;box-shadow:0 4px 15px #ff5d9e1a;border:2px solid rgba(255,255,255,.9);display:flex;flex-direction:column;gap:12px}.challenge-row{display:flex;align-items:center;justify-content:space-between;font-size:2.2rem;font-weight:700;color:var(--pink-600)}.challenge-input{width:80px;height:60px;border-radius:16px;border:3px solid var(--pink-300);background:#fff;text-align:center;font-size:2rem;font-weight:700;color:var(--pink-600);font-family:var(--font-kids);box-shadow:inset 0 3px 8px #0000000d;outline:none;transition:all .2s ease}.challenge-input:focus{border-color:var(--pink-500);box-shadow:0 0 0 4px #ff5d9e33,inset 0 3px 8px #0000000d;transform:scale(1.05)}.challenge-input.correct{border-color:#4ade80;color:#16a34a;background:#f0fdf4}.challenge-input.wrong{border-color:#f87171;color:#dc2626;background:#fef2f2}.challenge-analysis{font-size:1rem;color:#c0487a;background:var(--pink-100);padding:12px;border-radius:12px;border-left:4px solid var(--pink-400);line-height:1.4}.score-banner{background:linear-gradient(135deg,#ff85b8,#ff5d9e);color:#fff;padding:20px;border-radius:24px;text-align:center;font-size:1.8rem;font-weight:700;box-shadow:0 8px 25px #ff5d9e66;margin-bottom:20px;width:100%;max-width:500px;animation:popIn .5s cubic-bezier(.175,.885,.32,1.275)}@keyframes popIn{0%{transform:scale(.8) translateY(20px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}