*{box-sizing:border-box}:root{--primary-color:#ff6b6b;--secondary-color:#4d96ff;--success-color:#6bcb77;--warning-color:#ffd93d;--error-color:#ff6b6b;--text-main:#2d3436;--text-sub:#636e72}body{-webkit-user-select:none;user-select:none;scrollbar-width:none;overscroll-behavior-y:contain;background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%);width:100vw;height:100dvh;margin:0;padding:0;font-family:Comic Sans MS,Chalkboard SE,"cursive",sans-serif;overflow:hidden}body::-webkit-scrollbar{display:none}#root{height:100%}.app-container{flex-direction:column;justify-content:space-between;align-items:center;height:100%;padding:20px;display:flex;position:relative}.top-left-controls{z-index:200;position:absolute;top:25px;left:20px}.settings-panel{z-index:200;align-items:center;gap:10px;display:flex;position:absolute;top:25px;right:20px}.debug-controls{gap:8px;animation:.3s ease-out slideInRight;display:flex}@keyframes 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#0000000d}.canvas-wrapper{cursor:crosshair;background-color:#fcfcfc;flex-grow:1;position:relative}.canvas-placeholder{color:#bdc3c7;pointer-events:none;font-size:1.2rem;font-weight:700;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.handwriting-controls{z-index:5;position:absolute;bottom:15px;right:15px}.hw-btn.clear{color:#fff;cursor:pointer;background-color:#ffadad;border:2px solid #fff;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;padding:0;display:flex;box-shadow:0 4px 10px #ffadad80}.voice-input-container{background:#fff;border:3px solid #dfe6e9;border-radius:30px;flex-direction:column;align-items:center;gap:15px;width:100%;max-width:500px;margin-bottom:20px;padding:20px;display:flex;box-shadow:0 8px 25px #0000000d}.voice-transcript-area{flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:80px;display:flex;position:relative}.transcript-bubble{max-width:90%;color:var(--text-main);white-space:nowrap;background:#f0f2f5;border:2px solid #0000;border-radius:20px 20px 20px 5px;justify-content:flex-end;align-items:center;padding:12px 20px;font-size:1.1rem;line-height:1.4;transition:transform .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000,#000 15%);mask-image:linear-gradient(90deg,#0000,#000 15%)}.transcript-bubble.active{border-color:#4d96ff33;transform:scale(1.05);box-shadow:0 0 15px #4d96ff4d}.transcript-bubble span{flex-shrink:0}.interim-text{color:var(--secondary-color);font-weight:700}.highlight-digit{color:var(--primary-color);padding:0 2px;font-weight:800;text-decoration:underline}.recognized-number-badge{background:var(--success-color);color:#fff;border-radius:20px;padding:4px 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wave{0%{opacity:.4;transform:scale(1)}to{opacity:0;transform:scale(2)}}.voice-status{color:var(--text-sub);text-align:center;font-size:1.2rem;font-weight:700}.easter-hint{background:var(--primary-color);color:#fff;white-space:nowrap;z-index:100;pointer-events:none;border-radius:12px;padding:6px 12px;font-size:.9rem;font-weight:700;animation:.3s cubic-bezier(.175,.885,.32,1.275) bounceIn;position:absolute;top:-25px;left:50%;transform:translate(-50%);box-shadow:0 4px 10px #ff6b6b4d}@keyframes bounceIn{0%{opacity:0;transform:translate(-50%)scale(0)}to{opacity:1;transform:translate(-50%)scale(1)}}.manual-calc-layout{flex-direction:column;align-items:flex-end;gap:10px;width:100%;padding:20px 0;display:flex}.manual-row{justify-content:flex-end;align-items:center;gap:15px;width:100%;display:flex}.manual-operator-clickable{color:var(--secondary-color);cursor:pointer;-webkit-user-select:none;user-select:none;background:#f0f7ff;border-radius:15px;padding:10px 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0}.feedback-msg{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);text-align:center;width:auto;min-width:320px;color:var(--text-main);z-index:2000;pointer-events:none;white-space:nowrap;background:#fffffffa;border:4px solid #fff;border-radius:50px;flex-direction:column;align-items:center;gap:25px;padding:40px 60px;font-size:2.5rem;font-weight:700;animation:.5s cubic-bezier(.175,.885,.32,1.275) feedbackPop;display:flex;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 30px 60px #0003}@keyframes feedbackPop{0%{opacity:0;transform:translate(-50%,-50%)scale(.5)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}.feedback-icon{border-radius:50%;justify-content:center;align-items:center;width:100px;height:100px;display:flex}.feedback-msg .lucide-trophy{color:#ffd93d;stroke-width:2.5px}.feedback-msg .lucide-x-circle{color:#ff6b6b;stroke-width:2.5px}.hint-overlay{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background-color:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;z-index:2500!important}.hint-msg{border:6px solid var(--secondary-color);cursor:default;scrollbar-width:none;background-color:#fff;border-radius:40px;flex-direction:column;align-items:center;width:95vw;max-width:700px;max-height:90vh;padding:60px 20px 25px;animation:.4s cubic-bezier(.175,.885,.32,1.275) popIn;display:flex;position:relative;overflow-y:auto;box-shadow:0 30px 70px #0000004d}@keyframes popIn{0%{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}.hint-msg::-webkit-scrollbar{display:none}.hint-close-btn{width:44px;height:44px;color:var(--text-sub);cursor:pointer;background:#f0f2f5;border:none;border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex;position:absolute;top:15px;right:15px}.hint-close-btn:active{background:#dfe6e9;transform:scale(.9)}.visual-hint-clean{background:#fff;width:100%;padding:10px 0}.hint-visual-container{flex-direction:column;justify-content:center;align-items:center;gap:15px;width:100%;display:flex}.dot-frames-container{flex-direction:column;justify-content:center;align-items:center;gap:12px;width:100%;display:flex}.dot-grid{background:#f8f9fa;border:3px solid #eee;border-radius:20px;grid-template-columns:repeat(5,1fr);gap:12px;padding:15px;display:grid;box-shadow:inset 0 2px 5px #00000005}.dot-grid.align-right{direction:rtl}.dot-grid.align-right .dot{direction:ltr}@media (width>=768px){.hint-msg{width:85vw;max-width:900px;padding:50px 40px}.dot-frames-container{flex-direction:column;align-items:center;gap:15px}.dot-grid{grid-template-columns:repeat(10,1fr);gap:10px;width:auto;min-width:500px;min-height:70px;padding:15px 30px}.dot{width:40px;height:40px}}.dot{border-radius:50%;width:44px;height:44px;position:relative;box-shadow:inset -4px -4px 8px #0000001f}.dot.dot-1{background:radial-gradient(circle at 30% 30%,#4d96ff,#2196f3)}.dot.dot-2{background:radial-gradient(circle at 30% 30%,#ffd93d,#ff9800)}.dot.crossed:after{content:"✕";color:var(--error-color);text-shadow:0 0 4px #fff;font-size:32px;font-weight:900;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.mini-badge{color:var(--secondary-color);background:#eef6ff;border:3px solid #4d96ff26;border-radius:15px;padding:5px 20px;font-size:1.5rem;font-weight:900}.op-symbol{color:var(--text-sub);font-size:3rem;font-weight:900}.hint-steps{flex-direction:column;gap:10px;width:100%;margin-top:20px;display:flex}.hint-steps.multi-step{border-top:2px dashed #eee;padding-top:20px}.hint-step{color:var(--text-sub);text-align:center;font-size:1.3rem;font-weight:700}.hint-step:last-child{color:var(--success-color);text-align:center;border-top:3px solid #f0f2f5;width:100%;margin-top:15px;padding-top:20px;font-size:3rem;font-weight:900;display:block}@media (height<=700px){.math-area{font-size:4rem}.vertical-calc{border-radius:30px;width:200px;height:324px;padding:25px}.result-box{height:80px;padding-right:10px}.num-btn{border-radius:15px;height:60px;font-size:1.8rem}.summary-modal{padding:40px 20px 20px}.summary-header{margin-top:-20px;margin-bottom:10px}.trophy-container{width:80px;height:80px}.trophy-icon{width:60px!important;height:60px!important}.score-circle-outer{width:100px;height:100px;margin-bottom:10px;padding:5px}.score-num{font-size:2.2rem}.score-display{margin-bottom:15px}.stat-card{padding:8px}.stat-v{font-size:1.4rem}.final-btn{height:50px;padding:10px;font-size:1.2rem}.feedback-msg{min-width:260px;padding:30px 40px;font-size:1.8rem;top:50%;transform:translate(-50%,-50%)}.feedback-icon{width:80px;height:80px}.hint-msg{border-width:4px;border-radius:25px;padding:50px 15px 20px}.hint-steps{gap:5px;margin-top:10px}.hint-steps.multi-step{padding-top:10px}.hint-step{font-size:1.1rem}.hint-step:last-child{border-width:2px;padding-top:15px;font-size:2.2rem}.dot{width:28px;height:28px}.dot-grid{gap:6px;padding:8px}.timer-circle,.settings-icon-btn{width:44px;height:44px}.top-left-controls,.settings-panel{top:20px}.handwriting-container{height:280px}.voice-input-container{gap:10px;padding:15px}.mic-btn{width:70px;height:70px}.voice-status{font-size:1rem}}@media (width<=380px){.numpad{gap:8px}}