*,*:before,*:after{box-sizing:border-box}*{margin:0;padding:0}html{-moz-text-size-adjust:none;-webkit-text-size-adjust:none;text-size-adjust:none}body{min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}ul,ol{list-style:none}html:focus-within{scroll-behavior:smooth}a:not([class]){text-decoration-skip-ink:auto;color:currentColor}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}textarea:not([rows]){min-height:10em}:target{scroll-margin-block:5ex}@media(prefers-reduced-motion:reduce){html:focus-within{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}button{background:none;border:none;cursor:pointer}a{text-decoration:none;color:inherit}:focus-visible{outline:2px solid var(--color-focus, #3b82f6);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:root{--color-bg-primary: #f8fafc;--color-bg-secondary: #ffffff;--color-bg-tertiary: #f1f5f9;--color-bg-overlay: rgba(0, 0, 0, .5);--color-text-primary: #1e293b;--color-text-secondary: #64748b;--color-text-muted: #94a3b8;--color-text-inverse: #ffffff;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-focus: #3b82f6;--color-primary: #3b82f6;--color-primary-hover: #2563eb;--color-primary-active: #1d4ed8;--color-secondary: #64748b;--color-secondary-hover: #475569;--color-secondary-active: #334155;--color-success: #22c55e;--color-success-hover: #16a34a;--color-warning: #f59e0b;--color-error: #ef4444;--color-error-hover: #dc2626;--color-game-bg: #0f172a;--color-game-header: #1e293b;--color-game-board: #0f172a;--color-game-control: #1e293b;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;--font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.75;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--z-base: 0;--z-above: 10;--z-dropdown: 100;--z-sticky: 200;--z-overlay: 500;--z-modal: 1000;--z-toast: 1500;--game-max-width: 390px;--game-header-height: 56px;--game-stats-height: 48px;--game-controls-height: 64px;--game-level-nav-height: 48px;--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)}@media(prefers-color-scheme:dark){:root{--color-bg-primary: #0f172a;--color-bg-secondary: #1e293b;--color-bg-tertiary: #334155;--color-bg-overlay: rgba(0, 0, 0, .75);--color-text-primary: #f8fafc;--color-text-secondary: #cbd5e1;--color-text-muted: #64748b;--color-border: #334155;--color-border-light: #1e293b;--color-game-bg: #0f172a;--color-game-header: #1e293b;--color-game-board: #0f172a;--color-game-control: #1e293b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .6)}}.game-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);line-height:1;border-radius:var(--radius-md);transition:all var(--transition-fast);cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.game-btn:disabled{opacity:.5;cursor:not-allowed}.game-btn:active:not(:disabled){transform:scale(.97)}.game-btn-primary{background:var(--color-primary);color:var(--color-text-inverse)}.game-btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.game-btn-primary:active:not(:disabled){background:var(--color-primary-active)}.game-btn-secondary{background:var(--color-bg-tertiary);color:var(--color-text-primary);border:1px solid var(--color-border)}.game-btn-secondary:hover:not(:disabled){background:var(--color-bg-secondary);border-color:var(--color-primary);color:var(--color-primary)}.game-btn-ghost{background:transparent;color:var(--color-text-secondary)}.game-btn-ghost:hover:not(:disabled){background:var(--color-bg-tertiary);color:var(--color-text-primary)}.game-btn-icon{padding:var(--space-sm);min-width:40px;min-height:40px}.game-stats{display:flex;justify-content:center;gap:var(--space-lg);padding:var(--space-sm) var(--space-md);background:var(--color-bg-tertiary);border-radius:var(--radius-lg)}.game-stat{display:flex;flex-direction:column;align-items:center;gap:var(--space-xs)}.game-stat-value{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary)}.game-stat-label{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.stars-display{display:flex;justify-content:center;gap:var(--space-sm)}.stars-display .star{font-size:var(--font-size-2xl);opacity:.3;transition:all var(--transition-normal)}.stars-display .star.filled{opacity:1;color:var(--color-warning)}.game-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:var(--z-overlay);display:flex;align-items:center;justify-content:center;padding:var(--space-md);background:var(--color-bg-overlay);opacity:0;visibility:hidden;transition:opacity var(--transition-normal),visibility var(--transition-normal)}.game-overlay.active{opacity:1;visibility:visible}.game-overlay[aria-hidden=true]{pointer-events:none}.game-overlay[aria-hidden=false]{pointer-events:auto}.game-overlay-content{background:var(--color-bg-secondary);padding:var(--space-xl);border-radius:var(--radius-xl);text-align:center;max-width:90vw;width:320px;transform:scale(.9);transition:transform var(--transition-normal)}.game-overlay.active .game-overlay-content{transform:scale(1)}.game-overlay-title{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin-bottom:var(--space-md)}.game-overlay-title.win{color:var(--color-success)}.overlay-buttons{display:flex;gap:var(--space-md);justify-content:center;margin-top:var(--space-lg)}.overlay-buttons .game-btn{flex:1}.settings-content{text-align:left}.settings-group{display:flex;flex-direction:column;gap:var(--space-md);margin:var(--space-lg) 0}.setting-item{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) 0;cursor:pointer}.setting-item span{font-size:var(--font-size-md);color:var(--color-text-primary)}.setting-item input[type=checkbox]{width:44px;height:24px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--color-bg-tertiary);border-radius:var(--radius-full);position:relative;cursor:pointer;transition:background var(--transition-fast)}.setting-item input[type=checkbox]:before{content:"";position:absolute;top:2px;left:2px;width:20px;height:20px;background:var(--color-text-inverse);border-radius:50%;transition:transform var(--transition-fast)}.setting-item input[type=checkbox]:checked{background:var(--color-primary)}.setting-item input[type=checkbox]:checked:before{transform:translate(20px)}.skip-link{position:absolute;top:-100%;left:var(--space-md);z-index:var(--z-toast);padding:var(--space-sm) var(--space-md);background:var(--color-primary);color:var(--color-text-inverse);border-radius:var(--radius-md);font-size:var(--font-size-sm);transition:top var(--transition-fast)}.skip-link:focus{top:var(--space-md)}.level-nav{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-md);background:var(--color-bg-tertiary);border-radius:var(--radius-lg)}.level-progress{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-weight:var(--font-weight-medium)}.stats-summary{font-size:var(--font-size-md);color:var(--color-text-secondary);margin-top:var(--space-sm)}.loading{opacity:.6;pointer-events:none}.loading-skeleton{background:linear-gradient(90deg,var(--color-bg-tertiary) 25%,var(--color-border) 50%,var(--color-bg-tertiary) 75%);background-size:200% 100%;animation:loading 1.5s infinite}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}.hint-active{animation:hint-pulse .5s ease-in-out 3}@keyframes hint-pulse{0%,to{opacity:1}50%{opacity:.5}}html,body{height:100%;overflow:hidden}body{background:var(--color-game-bg);color:var(--color-text-inverse);font-family:var(--font-family)}.game-container{display:flex;flex-direction:column;height:100%;max-width:var(--game-max-width);margin:0 auto;padding-top:var(--safe-area-top);padding-bottom:var(--safe-area-bottom);padding-left:var(--safe-area-left);padding-right:var(--safe-area-right)}.game-header{display:flex;align-items:center;justify-content:space-between;height:var(--game-header-height);padding:0 var(--space-md);background:var(--color-game-header);flex-shrink:0}.game-header h1{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-inverse)}.game-header-controls{display:flex;gap:var(--space-sm)}.back-link{display:flex;align-items:center;gap:var(--space-xs);color:var(--color-text-muted);font-size:var(--font-size-sm);transition:color var(--transition-fast)}.back-link:hover{color:var(--color-text-inverse)}.game-stats{flex-shrink:0;margin:var(--space-sm) var(--space-md)}.game-board{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative;background:var(--color-game-board)}.game-board canvas{display:block;max-width:100%;max-height:100%;touch-action:none}.game-controls{display:flex;justify-content:center;gap:var(--space-md);padding:var(--space-md);background:var(--color-game-control);flex-shrink:0}.game-controls .game-btn{flex:1;max-width:120px}.level-nav{flex-shrink:0;margin:var(--space-sm) var(--space-md) var(--space-md)}#win-overlay .game-overlay-content{background:linear-gradient(135deg,var(--color-bg-secondary) 0%,var(--color-bg-tertiary) 100%)}#win-overlay .stars-display{margin:var(--space-md) 0}#win-overlay .star{font-size:3rem}#settings-overlay .game-overlay-content{background:var(--color-bg-secondary);color:var(--color-text-primary)}#settings-overlay h2{color:var(--color-text-primary)}.no-touch{touch-action:none}.canvas-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.canvas-fill{width:100%;height:100%}.game-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);padding:var(--space-md) var(--space-xl);background:var(--color-bg-overlay);border-radius:var(--radius-lg);color:var(--color-text-inverse);font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);text-align:center;pointer-events:none;opacity:0;transition:opacity var(--transition-normal)}.game-message.visible{opacity:1}@media(max-width:390px){.game-header{padding:0 var(--space-sm)}.game-controls{padding:var(--space-sm);gap:var(--space-sm)}.game-controls .game-btn{max-width:100px;padding:var(--space-xs) var(--space-sm);font-size:var(--font-size-xs)}}@media(min-height:900px){.game-board{padding:var(--space-md)}}@media(orientation:landscape)and (max-height:500px){.game-container{flex-direction:row;flex-wrap:wrap}.game-header{width:100%;height:auto;padding:var(--space-xs) var(--space-md)}.game-stats{width:auto;flex-direction:row;margin:0;padding:var(--space-xs)}.game-board{flex:1;min-height:0}.game-controls{flex-direction:column;width:auto;padding:var(--space-sm)}.game-controls .game-btn{flex:none;max-width:none}.level-nav{width:100%;margin:0 var(--space-sm) var(--space-sm)}}@media(-webkit-min-device-pixel-ratio:2),(min-resolution:192dpi){.game-board canvas{image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges}}