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768px){.numpad-button{width:48px;height:48px;font-size:18px}.title-gradient{font-size:22px}.glass-card{padding:12px}}.text-glow-cyan{text-shadow:0 0 10px var(--color-primary-glow)}.text-glow-magenta{text-shadow:0 0 10px var(--color-secondary-glow)}.border-glow{box-shadow:0 0 15px var(--color-primary-glow)}.no-select{-moz-user-select:none;user-select:none;-webkit-user-select:none}.sudoku-2d-container{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at center,rgba(0,40,60,.4) 0%,var(--color-bg-dark) 70%);position:relative}.sudoku-2d-container:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(0,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,255,255,.03) 1px,transparent 1px);background-size:50px 50px;pointer-events:none}.sudoku-grid-2d{display:flex;flex-direction:column;background:var(--color-bg-card);backdrop-filter:blur(var(--glass-blur)) saturate(var(--glass-saturate));-webkit-backdrop-filter:blur(var(--glass-blur)) saturate(var(--glass-saturate));border:2px solid var(--color-border);border-radius:var(--radius-lg);padding:4px;box-shadow:var(--shadow-card),var(--shadow-glow);outline:none}.sudoku-grid-2d:focus{border-color:var(--color-primary)}.sudoku-row{display:flex}.sudoku-cell{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ffffff08,#ffffff03);border:1px solid rgba(255,255,255,.08);cursor:pointer;transition:all var(--transition-fast);position:relative}.sudoku-cell:hover{background:linear-gradient(135deg,#00ffff14,#00ffff08)}.sudoku-cell--selected{background:linear-gradient(135deg,#0ff3,#00ffff1a)!important;border-color:var(--color-primary)!important;box-shadow:inset 0 0 15px var(--color-primary-glow),0 0 10px var(--color-primary-glow)}.sudoku-cell--right-border{border-right:2px solid rgba(255,255,255,.25)}.sudoku-cell--bottom-border{border-bottom:2px solid rgba(255,255,255,.25)}.sudoku-cell__value{font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--color-text-primary);text-shadow:0 0 10px var(--color-primary-glow);transition:all var(--transition-fast)}.sudoku-cell__value--selected{color:var(--color-primary);text-shadow:0 0 15px var(--color-primary-glow)}.sudoku-cell--highlighted{background:linear-gradient(135deg,#00ffff0f,#00ffff05)!important}.sudoku-cell--same-value{background:linear-gradient(135deg,#ff00ff14,#ff00ff08)!important;border-color:#f0f3!important}.sudoku-cell--same-value .sudoku-cell__value{color:var(--color-secondary);text-shadow:0 0 10px var(--color-secondary-glow)}.sudoku-cell--touched{transform:scale(.92);background:linear-gradient(135deg,#0ff3,#00ffff1a)!important}@media (max-width: 500px){.sudoku-cell{width:36px;height:36px}.sudoku-cell__value{font-size:16px}}.mode-tabs{display:flex;gap:2px;padding:3px;background:#00000080;border-radius:var(--radius-full);border:1px solid var(--color-border)}.mode-tab{flex:1;padding:8px 12px;font-size:12px;font-weight:600;color:var(--color-text-muted);background:transparent;border:none;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-spring);white-space:nowrap}.mode-tab--active{color:var(--color-text-primary);background:linear-gradient(135deg,var(--color-primary),rgba(0,255,255,.6));box-shadow:0 0 15px var(--color-primary-glow)}.mode-tab--active-secondary{background:linear-gradient(135deg,var(--color-secondary),rgba(255,0,255,.6));box-shadow:0 0 15px var(--color-secondary-glow)}.mode-tab--active-tertiary{background:linear-gradient(135deg,var(--color-success),rgba(0,255,136,.6));box-shadow:0 0 15px #0f86}.mode-tab:not(.mode-tab--active):hover{color:var(--color-text-secondary);background:#ffffff0d}:root{--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 0px);--safe-area-left: env(safe-area-inset-left, 0px);--safe-area-right: env(safe-area-inset-right, 0px);--mobile-padding: 16px;--mobile-gap: 12px;--touch-target-min: 44px;--touch-target-comfortable: 48px;--touch-target-large: 56px;--mobile-font-xs: 11px;--mobile-font-sm: 13px;--mobile-font-md: 15px;--mobile-font-lg: 17px;--mobile-font-xl: 20px;--mobile-font-2xl: 24px;--mobile-transition-instant: .1s;--mobile-transition-fast: .15s;--mobile-transition-normal: .2s;--mobile-spring: cubic-bezier(.34, 1.56, .64, 1);--mobile-ease-out: cubic-bezier(.16, 1, .3, 1)}@media (max-width: 768px){html,body{overscroll-behavior:none;-webkit-overflow-scrolling:touch;-webkit-user-select:none;-moz-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}#root{position:fixed;top:0;right:0;bottom:0;left:0;overflow:hidden}}.mobile-layout{display:flex;flex-direction:column;height:100%;padding:var(--mobile-padding);padding-top:calc(var(--mobile-padding) + var(--safe-area-top));padding-bottom:calc(var(--mobile-padding) + var(--safe-area-bottom));padding-left:calc(var(--mobile-padding) + var(--safe-area-left));padding-right:calc(var(--mobile-padding) + var(--safe-area-right))}.mobile-header{display:flex;align-items:center;justify-content:space-between;gap:var(--mobile-gap);padding:12px 16px;background:#081020d9;backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-xl);box-shadow:0 4px 24px #0006,0 0 0 1px #00ffff0d,inset 0 1px #ffffff0d}.mobile-title{font-size:var(--mobile-font-xl);font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}@media (max-width: 768px){.mode-tabs{display:flex;gap:4px;padding:4px;background:#0009;border-radius:var(--radius-full);border:1px solid rgba(255,255,255,.1);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.mode-tab{flex:1;min-height:var(--touch-target-min);padding:10px 14px;font-size:var(--mobile-font-sm);font-weight:600;border-radius:var(--radius-full);transition:all var(--mobile-transition-normal) var(--mobile-ease-out);-webkit-tap-highlight-color:transparent}.mode-tab:active{transform:scale(.95);opacity:.8}.mode-tab--active{transform:scale(1.02)}}@media (max-width: 768px){.status-indicator{padding:8px 14px;font-size:var(--mobile-font-sm);border-radius:var(--radius-full);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.status-dot{width:8px;height:8px}}@media (max-width: 768px){.glass-card,.glass-card-static{background:#081020bf;backdrop-filter:blur(24px) saturate(200%);-webkit-backdrop-filter:blur(24px) saturate(200%);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);box-shadow:0 8px 32px #00000080,0 0 0 1px #00ffff08,inset 0 1px #ffffff08;padding:16px}.glass-card:hover{background:#081020bf;border-color:#ffffff14;box-shadow:0 8px 32px #00000080,0 0 0 1px #00ffff08,inset 0 1px #ffffff08}}.mobile-numpad-container{position:fixed;bottom:0;left:0;right:0;padding:16px;padding-bottom:calc(16px + var(--safe-area-bottom));background:linear-gradient(to top,rgba(0,4,8,.98) 0%,rgba(0,4,8,.95) 50%,transparent 100%);z-index:100;pointer-events:auto}.mobile-numpad{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;max-width:400px;margin:0 auto}.mobile-numpad-button{aspect-ratio:1;min-height:var(--touch-target-comfortable);display:flex;align-items:center;justify-content:center;font-size:var(--mobile-font-xl);font-weight:700;font-family:var(--font-mono);color:var(--color-text-primary);background:linear-gradient(135deg,#ffffff1a,#ffffff08);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--mobile-transition-fast) var(--mobile-ease-out);-webkit-tap-highlight-color:transparent;transform:translateZ(0);will-change:transform,background-color}.mobile-numpad-button:active{transform:scale(.92);background:linear-gradient(135deg,#0ff3,#00ffff14);border-color:var(--color-primary);box-shadow:0 0 20px var(--color-primary-glow)}.mobile-numpad-button--selected{background:linear-gradient(135deg,#0ff3,#00ffff1a);border-color:var(--color-primary);box-shadow:0 0 16px var(--color-primary-glow);color:var(--color-primary)}.mobile-numpad-button--clear{background:linear-gradient(135deg,#ff336626,#ff33660d);border-color:#ff33664d;color:var(--color-error);font-size:var(--mobile-font-md)}.mobile-numpad-button--clear:active{background:linear-gradient(135deg,#ff33664d,#ff336626);box-shadow:0 0 20px #f366}@media (max-width: 768px) and (orientation: landscape){.mobile-numpad{grid-template-columns:repeat(10,1fr);max-width:100%}.mobile-numpad-button{aspect-ratio:auto;min-height:40px;font-size:var(--mobile-font-lg)}}@media (max-width: 768px){.sudoku-2d-container{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding-top:140px;padding-bottom:180px;overflow:hidden}.sudoku-grid-2d{--cell-size: min(calc((100vw - 48px) / 9), calc((100vh - 360px) / 9));padding:3px;border-radius:var(--radius-lg);box-shadow:0 8px 40px #00000080,0 0 60px #00ffff1a,inset 0 1px #ffffff0d}.sudoku-cell{width:var(--cell-size);height:var(--cell-size);min-width:32px;min-height:32px;max-width:48px;max-height:48px;border:1px solid rgba(255,255,255,.06);transition:all var(--mobile-transition-fast) var(--mobile-ease-out);-webkit-tap-highlight-color:transparent;touch-action:manipulation}.sudoku-cell:active{background:linear-gradient(135deg,#00ffff26,#00ffff14)!important;transform:scale(.95)}.sudoku-cell--selected{background:linear-gradient(135deg,#00ffff40,#00ffff26)!important;border-color:var(--color-primary)!important;box-shadow:inset 0 0 20px var(--color-primary-glow),0 0 15px var(--color-primary-glow);z-index:1}.sudoku-cell__value{font-size:clamp(14px,calc(var(--cell-size) * .45),20px);font-weight:700}.sudoku-cell--right-border{border-right:2px solid rgba(0,255,255,.2)}.sudoku-cell--bottom-border{border-bottom:2px solid rgba(0,255,255,.2)}}@media (max-width: 768px){.controls-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;pointer-events:none;padding:var(--mobile-padding);padding-top:calc(var(--mobile-padding) + var(--safe-area-top));padding-bottom:calc(var(--mobile-padding) + var(--safe-area-bottom));z-index:10}.controls-header{pointer-events:auto;display:flex;flex-direction:column;gap:12px}.controls-spacer{flex:1;min-height:20px}.controls-footer{pointer-events:auto}}@media (max-width: 768px){.title-gradient{font-size:var(--mobile-font-xl);letter-spacing:-.3px}.subtitle{font-size:var(--mobile-font-xs);margin-top:2px}}@media (max-width: 768px){.coord-display{padding:6px 10px;font-size:var(--mobile-font-sm);border-radius:var(--radius-md)}}@media (max-width: 768px){.slider-container{gap:8px;padding:4px 0}.slider-label{width:20px;font-size:var(--mobile-font-xs)}.slider-track{height:8px;border-radius:var(--radius-full)}.slider-track::-webkit-slider-thumb{width:24px;height:24px}.slider-value{font-size:var(--mobile-font-sm)}}@media (max-width: 768px){.neon-button{min-height:var(--touch-target-min);padding:12px 20px;font-size:var(--mobile-font-md);border-radius:var(--radius-lg);-webkit-tap-highlight-color:transparent}.neon-button:active{transform:scale(.96);opacity:.9}.neon-button:hover{transform:none}}@media (max-width: 768px){.kbd,.keyboard-hint{display:none}}@media (max-width: 768px){.fade-in{animation:fadeInMobile var(--mobile-transition-normal) var(--mobile-ease-out)}@keyframes fadeInMobile{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.slide-up{animation:slideUpMobile var(--mobile-transition-normal) var(--mobile-spring)}@keyframes slideUpMobile{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-dot{0%,to{opacity:1}50%{opacity:.7}}}@media (max-width: 768px){.mobile-hint-card{background:#081020d9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);padding:16px 20px;text-align:center;box-shadow:0 4px 20px #0000004d,0 0 40px #00ffff0d}.mobile-hint-card p{font-size:var(--mobile-font-md);color:#ffffffb3;margin:0}.mobile-hint-card p+p{margin-top:6px;font-size:var(--mobile-font-sm);color:#ffffff80}}@media (max-width: 900px) and (orientation: landscape){.controls-overlay{flex-direction:row;align-items:flex-start;gap:16px}.controls-header{flex:0 0 auto;max-width:260px}.controls-spacer{display:none}.controls-footer{flex:1;display:flex;align-items:flex-end;justify-content:center}.sudoku-2d-container{padding-top:20px;padding-bottom:20px;padding-left:280px;justify-content:center}.sudoku-grid-2d{--cell-size: min(calc((100vw - 360px) / 9), calc((100vh - 80px) / 9))}.mobile-numpad-container{position:relative;bottom:auto;padding:0;background:none}}@media (max-width: 374px){:root{--mobile-padding: 12px;--mobile-gap: 8px}.mobile-title{font-size:var(--mobile-font-lg)}.mode-tab{padding:8px 10px;font-size:var(--mobile-font-xs)}.sudoku-cell{min-width:28px;min-height:28px}.mobile-numpad-button{font-size:var(--mobile-font-lg);min-height:40px}}.touch-bounce{transition:transform var(--mobile-transition-fast) var(--mobile-spring)}.touch-bounce:active{transform:scale(.95)}.touch-glow:active{box-shadow:0 0 20px var(--color-primary-glow)}@media (max-width: 768px){@media (prefers-contrast: high){.glass-card,.glass-card-static{background:#000000e6;border-color:#ffffff4d}.sudoku-cell{border-color:#fff6}.sudoku-cell--selected{border-color:var(--color-primary);border-width:2px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}}@media (max-width: 768px){.scene-container canvas{touch-action:pan-x pan-y}}body{overscroll-behavior-y:contain}@keyframes mobile-pulse{0%,to{box-shadow:inset 0 0 15px var(--color-primary-glow),0 0 10px var(--color-primary-glow)}50%{box-shadow:inset 0 0 20px var(--color-primary-glow),0 0 20px var(--color-primary-glow)}}@media (max-width: 768px){.sudoku-cell--selected{animation:mobile-pulse 2s ease-in-out infinite}}@keyframes slideFromBottom{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.bottom-sheet-enter{animation:slideFromBottom var(--mobile-transition-normal) var(--mobile-spring)}.mobile-fab{position:fixed;bottom:calc(24px + var(--safe-area-bottom));right:calc(24px + var(--safe-area-right));width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),rgba(0,255,255,.8));border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 20px #0ff6,0 8px 40px #0000004d;transition:all var(--mobile-transition-fast) var(--mobile-spring);z-index:200;-webkit-tap-highlight-color:transparent}.mobile-fab:active{transform:scale(.9)}.mobile-fab svg{width:24px;height:24px;color:var(--color-bg-dark)}.hover\:border-white\/20:hover{border-color:#fff3}.hover\:bg-primary\/20:hover{background-color:#0ff3}.hover\:bg-red-500\/10:hover{background-color:#ef44441a}.hover\:bg-secondary\/20:hover{background-color:#f0f3}.hover\:bg-white\/10:hover{background-color:#ffffff1a}.hover\:bg-white\/5:hover{background-color:#ffffff0d}.hover\:text-white:hover{--tw-text-opacity: 1;color:rgb(255 255 255 / var(--tw-text-opacity, 1))}.focus\:border-primary:focus{--tw-border-opacity: 1;border-color:rgb(0 255 255 / var(--tw-border-opacity, 1))}.focus\:outline-none:focus{outline:2px solid transparent;outline-offset:2px}.active\:scale-95:active{--tw-scale-x: .95;--tw-scale-y: .95;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}@media (min-width: 768px){.md\:p-6{padding:1.5rem}}