*{margin:0;padding:0;box-sizing:border-box}:root{--primary-blue: #3b82f6;--primary-blue-dark: #2563eb;--primary-blue-light: #60a5fa;--secondary-slate: #1e293b;--secondary-slate-light: #334155;--background-light: #f8fafc;--background-white: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--text-tertiary: #94a3b8;--border-color: #e2e8f0;--success-green: #22c55e;--error-red: #ef4444;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);--gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);--gradient-background: linear-gradient(to bottom, #f8fafc 0%, #e0e7ff 100%);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-blue: 0 4px 20px rgba(59, 130, 246, .3);--shadow-blue-lg: 0 10px 40px rgba(59, 130, 246, .4);--transition-fast: .15s ease-in-out;--transition-base: .25s ease-in-out;--transition-slow: .35s ease-in-out;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;background-color:var(--background-light);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-height:100vh;background:var(--gradient-background);color:var(--text-primary)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}a{font-weight:500;text-decoration:inherit;transition:color var(--transition-fast)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--background-light)}::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:var(--radius-full);transition:background var(--transition-fast)}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}::selection{background-color:#3b82f64d;color:var(--text-primary)}:focus-visible{outline:2px solid var(--primary-blue);outline-offset:2px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}@keyframes scaleIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}@keyframes wiggle{0%,to{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}.fade-in{animation:fadeIn .5s ease-in-out}.slide-in{animation:slideIn .5s ease-out}.bounce{animation:bounce 1s infinite}.pulse{animation:pulse 2s infinite}.float{animation:float 3s ease-in-out infinite}.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.glass-effect{background:#ffffffb3;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3)}.card-hover{transition:all var(--transition-base)}.card-hover:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl)}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit;transition:all var(--transition-base)}button:active{transform:scale(.98)}.loading{position:relative;pointer-events:none}.loading:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#fff0,#ffffff80,#fff0);animation:shimmer 2s infinite}@media (max-width: 480px){:root{font-size:12px}}@media (min-width: 481px) and (max-width: 768px){:root{font-size:14px}}@media (min-width: 769px){:root{font-size:16px}}@media print{body{background:#fff}@page{margin:2cm}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media (prefers-contrast: high){:root{--primary-blue: #0056b3;--text-primary: #000000;--background-light: #ffffff}}@media (prefers-color-scheme: dark){:root{color-scheme:dark}}@media (hover: hover) and (pointer: fine){button:hover,a:hover{transform:translateY(-2px)}}@media (hover: none) and (pointer: coarse){button,a{min-height:44px;min-width:44px}.game-input-field .MuiOutlinedInput-root input{padding:clamp(16px,4vw,20px) clamp(20px,5vw,30px)!important;font-size:clamp(1.8rem,5vw,2.2rem)!important}.game-submit-button,.game-restart-button,.game-back-button{min-height:clamp(56px,8vw,auto)!important;padding:clamp(.75rem,2vw,1rem) clamp(1.5rem,4vw,2rem)!important;font-size:clamp(1.2rem,3vw,1.4rem)!important}.MuiCheckbox-root{padding:clamp(8px,2vw,12px)!important}.MuiButton-root{min-height:44px!important;padding-top:clamp(8px,2vw,12px)!important;padding-bottom:clamp(8px,2vw,12px)!important}}.game-container{padding:clamp(.5rem,4vw,1.5rem);min-height:calc(100vh - 200px)}.game-card{min-height:clamp(400px,60vh,600px);background:linear-gradient(135deg,#fff,#f0f9ff);border-radius:clamp(1rem,2vw,1.25rem);border:2px solid #e0e7ff;box-shadow:var(--shadow-lg);display:flex;flex-direction:column}.game-card-content{padding:clamp(1rem,3vw,2rem);flex:1;display:flex;flex-direction:column;text-align:center}.game-math-problem{font-size:clamp(1.8rem,8vw,4rem);font-weight:700;line-height:1.1;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0}@keyframes checkmarkPulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.2);opacity:.8}to{transform:scale(1);opacity:1}}@keyframes crossShake{0%,to{transform:rotate(0) scale(1);opacity:1}25%{transform:rotate(-10deg) scale(1.1);opacity:.9}75%{transform:rotate(10deg) scale(1.1);opacity:.9}}.game-feedback-icon{animation:var(--feedback-animation, none);filter:drop-shadow(0 2px 4px rgba(0,0,0,.2));transition:all .3s ease}.game-feedback-icon.correct{--feedback-animation: checkmarkPulse .6s ease-in-out;color:#22c55e}.game-feedback-icon.incorrect{--feedback-animation: crossShake .6s ease-in-out;color:#ef4444}.game-input-section{margin:clamp(.5rem,2vw,1rem) 0 clamp(1rem,3vw,1.5rem)}.game-input-field{width:min(100%,300px);max-width:300px}.game-input-field .MuiOutlinedInput-root{font-size:clamp(1.5rem,3vw,2rem);border-radius:12px;background-color:#fff;min-height:clamp(50px,8vw,auto);border-color:#e2e8f0;transition:all .3s ease}.game-input-field .MuiOutlinedInput-root input{text-align:center;font-weight:600;padding:clamp(12px,2vw,16px) clamp(16px,3vw,24px)}.game-input-field .MuiOutlinedInput-root:hover{border-color:#3b82f6;box-shadow:0 4px 12px #3b82f633}.game-input-field .MuiOutlinedInput-root.Mui-focused{box-shadow:0 4px 20px #3b82f64d}.game-button-group{display:flex;gap:clamp(.5rem,1vw,.75rem);justify-content:center;margin:clamp(.75rem,1.5vw,1rem) 0 clamp(1.5rem,2vw,2rem);flex-wrap:wrap}.game-submit-button{padding:clamp(.5rem,1.5vw,.5rem) clamp(1rem,3vw,1.5rem);font-size:clamp(1rem,2vw,1.2rem);font-weight:600;background:var(--gradient-secondary);border-radius:12px;box-shadow:var(--shadow-blue);min-height:clamp(48px,6vw,auto);border:none;color:#fff;cursor:pointer;transition:all .3s ease}.game-restart-button{min-height:clamp(40px,5vw,auto);font-size:clamp(.8rem,1.5vw,1rem);padding:clamp(.5rem,1vw,.5rem) clamp(.5rem,2vw,1rem);border:1px solid #64748b;color:#64748b;border-radius:8px;background:transparent;cursor:pointer;transition:all .3s ease}.game-restart-button:hover{border-color:#3b82f6;background-color:#3b82f60d;color:#3b82f6}.game-progress-section{text-align:center}.game-progress-title{margin-bottom:clamp(.75rem,2vw,.75rem);font-weight:600;color:#1e293b;font-size:clamp(1rem,2vw,1.25rem)}.game-progress-circle{position:relative;display:inline-flex;margin-bottom:clamp(1rem,2vw,1.5rem)}.game-progress-circle .MuiCircularProgress-root{color:#3b82f6;filter:drop-shadow(0 0 8px rgba(59,130,246,.5));transition:all .5s ease}.game-progress-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column}.game-progress-number{font-weight:700;color:#1e293b;font-size:clamp(1.5rem,3vw,2.5rem)}.game-progress-label{color:#64748b;font-size:clamp(.875rem,1.5vw,1.125rem)}.game-progress-status{color:#64748b;font-size:clamp(.875rem,1.5vw,1.125rem);line-height:1.4}.setup-title{margin-bottom:clamp(.75rem,2vw,1rem);font-weight:700;text-align:center;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-size:clamp(1.8rem,4vw,2.5rem)}.setup-grid{margin-bottom:clamp(.5rem,2vw,1rem)}.setup-card{height:100%;border-radius:clamp(.75rem,1.5vw,1rem);transition:all .3s ease;border:2px solid transparent;background:#fff;box-shadow:var(--shadow-md)}.setup-card:hover{transform:translateY(-2px);box-shadow:0 8px 16px #3b82f626;border-color:#3b82f6}.setup-card-content{padding:clamp(.375rem,1vw,.75rem)}.setup-operation-header{display:flex;align-items:center;justify-content:center;margin-bottom:clamp(.25rem,1vw,.5rem)}.setup-input-group{display:flex;gap:clamp(.125rem,.5vw,.5rem);align-items:center}.setup-input-field{flex:1}.setup-input-field .MuiInputLabel-root{font-size:clamp(.75rem,1.5vw,1rem)}.setup-input-field .MuiOutlinedInput-root{font-size:clamp(.75rem,1.5vw,1rem);min-height:clamp(32px,4vw,auto)}.setup-range-text{display:block;margin-top:clamp(.125rem,.5vw,.25rem);color:#64748b;text-align:center;font-size:clamp(.65rem,1.2vw,.875rem);line-height:clamp(1.2,2vw,1.4)}.setup-daily-goal-card{display:inline-block;padding:clamp(.5rem,2vw,1rem);background:linear-gradient(135deg,#fff,#dbeafe);border-radius:clamp(.75rem,1.5vw,1.25rem);border:2px solid #bfdbfe;transition:all .3s ease;max-width:100%;text-align:center;box-shadow:var(--shadow-md)}.setup-daily-goal-card:hover{box-shadow:0 20px 40px #3b82f633;transform:translateY(-5px)}.setup-goal-progress{margin-bottom:clamp(.5rem,1.5vw,.75rem);position:relative;display:inline-flex}.setup-goal-title{margin-bottom:clamp(.5rem,1.5vw,.75rem);color:#64748b;font-size:clamp(.9rem,2vw,1.25rem);font-weight:600}.setup-start-button{padding:clamp(.375rem,1vw,.5rem) clamp(.75rem,2vw,1.5rem);font-size:clamp(.9rem,2vw,1.2rem);font-weight:600;background:var(--gradient-secondary);border-radius:12px;box-shadow:0 8px 16px #3b82f64d;transition:all .3s ease;min-height:clamp(44px,5vw,auto);border:none;color:#fff;cursor:pointer}.setup-start-button:hover{background:linear-gradient(135deg,#2563eb,#1e40af);transform:translateY(-3px);box-shadow:0 12px 24px #3b82f666}.setup-start-button:active{transform:translateY(0)}@media (max-width: 768px){.game-card{min-height:auto}.game-progress-circle .MuiCircularProgress-root{width:100px!important;height:100px!important}.setup-daily-goal-card .MuiCircularProgress-root{width:80px!important;height:80px!important}}@media (min-width: 769px){.game-progress-circle .MuiCircularProgress-root{width:140px!important;height:140px!important}.setup-daily-goal-card .MuiCircularProgress-root{width:120px!important;height:120px!important}}.keyboard-hint{backdropFilter:blur(10px);border:1px solid rgba(255,255,255,.2);pointerEvents:"none";userSelect:"none"}@media (min-width: 1200px){.game-card{min-height:600px}.game-card-content{padding:2rem}}