@import"https://fonts.googleapis.com/css2?family=Lexend:wght@400;500;600;700;800&display=swap";:root{--color-bg-primary: #0b0e14;--color-bg-secondary: #12141c;--glass-surface: rgba(20, 24, 35, .65);--glass-surface-hover: rgba(30, 35, 50, .75);--glass-border: rgba(255, 255, 255, .08);--glass-highlight: rgba(255, 255, 255, .05);--glass-blur: blur(16px);--color-bg-surface: var(--glass-surface);--color-bg-surface-solid: #1e1e24;--color-bg-elevated: rgba(255, 255, 255, .03);--color-bg-elevated-hover: rgba(255, 255, 255, .08);--color-tile-empty: rgba(255, 255, 255, .03);--color-grid-bg: rgba(0, 0, 0, .2);--color-grid-line: rgba(255, 255, 255, .06);--color-text-primary: #f8fafc;--color-text-secondary: rgba(248, 250, 252, .8);--color-text-muted: rgba(248, 250, 252, .5);--color-text-hint: rgba(248, 250, 252, .3);--color-accent-orange: #ff9f1c;--color-accent-orange-rgb: 255, 159, 28;--color-accent-orange-light: #ffb84d;--color-accent-orange-glow: 0 0 20px rgba(255, 159, 28, .4);--color-accent-teal: #2ec4b6;--color-accent-teal-rgb: 46, 196, 182;--color-accent-teal-dark: #208b81;--color-accent-teal-glow: 0 0 20px rgba(46, 196, 182, .4);--color-accent-danger: #ef4444;--color-accent-danger-dark: #b91c1c;--color-accent-danger-rgb: 239, 68, 68;--color-accent-danger-glow: 0 0 20px rgba(239, 68, 68, .4);--color-accent-purple: #a78bfa;--color-accent-purple-dark: #7c3aed;--color-accent-purple-glow: 0 0 20px rgba(124, 58, 237, .4);--color-accent-marathon: #6366f1;--color-accent-marathon-light: #818cf8;--gradient-mesh: radial-gradient(at 0% 0%, rgba(56, 189, 248, .15) 0px, transparent 50%), radial-gradient(at 100% 0%, rgba(167, 139, 250, .15) 0px, transparent 50%), radial-gradient(at 100% 100%, rgba(46, 196, 182, .15) 0px, transparent 50%), radial-gradient(at 0% 100%, rgba(255, 159, 28, .1) 0px, transparent 50%);--gradient-orange: linear-gradient(135deg, rgba(255, 159, 28, .2), rgba(255, 107, 107, .1));--gradient-orange-hover: linear-gradient(135deg, rgba(255, 159, 28, .4), rgba(255, 107, 107, .3));--gradient-teal: linear-gradient(135deg, rgba(46, 196, 182, .2), rgba(30, 140, 130, .1));--gradient-teal-hover: linear-gradient(135deg, rgba(46, 196, 182, .4), rgba(30, 140, 130, .3));--gradient-teal-solid: linear-gradient(135deg, #2ec4b6, #208b81);--gradient-danger: linear-gradient(135deg, rgba(239, 68, 68, .2), rgba(185, 28, 28, .1));--gradient-danger-hover: linear-gradient(135deg, rgba(239, 68, 68, .4), rgba(185, 28, 28, .3));--gradient-danger-solid: linear-gradient(135deg, #ef4444, #b91c1c);--gradient-purple: linear-gradient(135deg, rgba(167, 139, 250, .2), rgba(124, 58, 237, .1));--gradient-purple-hover: linear-gradient(135deg, rgba(167, 139, 250, .4), rgba(124, 58, 237, .3));--gradient-marathon: linear-gradient(135deg, rgba(99, 102, 241, .2), rgba(67, 56, 202, .1));--gradient-marathon-hover: linear-gradient(135deg, rgba(99, 102, 241, .4), rgba(67, 56, 202, .3));--gradient-text-title: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);--border-subtle: 1px solid rgba(255, 255, 255, .1);--border-light: 1px solid rgba(255, 255, 255, .15);--border-medium: 1px solid rgba(255, 255, 255, .2);--border-orange: 1px solid rgba(255, 159, 28, .3);--border-orange-hover: 1px solid rgba(255, 159, 28, .5);--border-teal: 1px solid rgba(78, 205, 196, .3);--border-teal-hover: 1px solid rgba(78, 205, 196, .5);--border-danger: 1px solid rgba(255, 107, 107, .3);--border-danger-hover: 1px solid rgba(255, 107, 107, .5);--border-purple: 1px solid rgba(170, 150, 218, .3);--border-purple-hover: 1px solid rgba(170, 150, 218, .5);--space-2xs: .25rem;--space-xs: .5rem;--space-sm: .75rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-2xl: 24px;--shadow-sm: 0 4px 15px rgba(0, 0, 0, .3);--shadow-md: 0 10px 30px rgba(0, 0, 0, .5);--shadow-lg: 0 20px 50px rgba(0, 0, 0, .5);--shadow-glow-teal: 0 4px 20px rgba(78, 205, 196, .2);--shadow-glow-orange: 0 4px 20px rgba(255, 159, 28, .2);--shadow-glow-danger: 0 4px 15px rgba(231, 29, 54, .3);--shadow-glow-purple: 0 4px 20px rgba(170, 150, 218, .2);--shadow-inset: inset 0 1px 0 rgba(255, 255, 255, .1);--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-smooth: .2s cubic-bezier(.4, 0, .2, 1);--transition-bounce: .3s cubic-bezier(.175, .885, .32, 1.275);--transition-pop: .5s cubic-bezier(.19, 1, .22, 1);--font-family: "Lexend", Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;--font-family-display: "Lexend", sans-serif;--font-size-xs: .75rem;--font-size-sm: .85rem;--font-size-base: 1rem;--font-size-md: 1.1rem;--font-size-lg: 1.25rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--font-size-3xl: 2.5rem;--font-size-4xl: 4rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--font-weight-extrabold: 800;--line-height-tight: 1;--line-height-normal: 1.5;--line-height-relaxed: 1.6;--letter-spacing-tight: -2px;--letter-spacing-normal: 0;--letter-spacing-wide: .05em;--z-base: 1;--z-region: 5;--z-hint: 10;--z-selection: 20;--z-tooltip: 100;--z-modal: 1000;--z-tutorial: 2000;--touch-target-min: 48px;--grid-max-size: 85vmin;--color-selection-active: rgba(78, 205, 196, .25);--color-selection-border: rgba(78, 205, 196, .8);--color-success-glow: rgba(78, 205, 196, .5)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes popIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes popInBounce{0%{opacity:0;transform:scale(.8) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseError{0%{border-color:#f44;background-color:#ff00004d}to{border-color:red;background-color:#ff000080}}@keyframes dragAction{0%{transform:translate(0) scale(1.1);opacity:0}20%{opacity:1;transform:translate(0) scale(1)}60%{opacity:1;transform:translate(calc((var(--end-col) - var(--start-col)) * (var(--cell-size) + var(--gap))),calc((var(--end-row) - var(--start-row)) * (var(--cell-size) + var(--gap)))) scale(1)}80%{opacity:0;transform:translate(calc((var(--end-col) - var(--start-col)) * (var(--cell-size) + var(--gap))),calc((var(--end-row) - var(--start-row)) * (var(--cell-size) + var(--gap)))) scale(1.1)}to{opacity:0}}.animate-pop{animation:popIn .3s cubic-bezier(.175,.885,.32,1.275) forwards}.animate-fade-in{animation:fadeIn .2s ease-out forwards}.animate-slide{animation:slideUp .4s cubic-bezier(.19,1,.22,1) forwards}@keyframes popOut{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.9)}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.animate-pop-out{animation:popOut .2s ease-out forwards}.animate-fade-out{animation:fadeOut .2s ease-out forwards}@keyframes successPop{0%{transform:scale(1)}50%{transform:scale(1.03);box-shadow:0 0 25px var(--color-success-glow)}to{transform:scale(1)}}@keyframes glowPulse{0%,to{box-shadow:0 0 15px #4ecdc44d}50%{box-shadow:0 0 25px #4ecdc480}}.animate-success{animation:successPop .4s ease-out}.modal-overlay{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);animation:fadeIn var(--transition-normal) ease-out forwards}.modal-overlay--dark{background:#0a0a10d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.modal-card{background:var(--glass-surface);border:1px solid var(--glass-border);border-top:1px solid rgba(255,255,255,.15);border-radius:var(--radius-xl);padding:var(--space-xl);max-width:400px;width:90%;text-align:center;box-shadow:0 8px 32px #0000005c;backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);animation:popIn var(--transition-bounce) forwards;position:relative;overflow:hidden}.modal-card--large{max-width:480px;padding:var(--space-2xl);border-radius:var(--radius-2xl)}.modal-card:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at center,rgba(var(--color-accent-orange-rgb),.08) 0%,transparent 70%);pointer-events:none;z-index:0}.modal-card>*{position:relative;z-index:1}.modal-card h2{margin:0 0 var(--space-md) 0;font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary)}.modal-card p{margin:var(--space-xs) 0;color:var(--color-text-muted);font-size:var(--font-size-sm);line-height:var(--line-height-normal)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);font-family:inherit;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-normal);border:1px solid var(--glass-border);background:var(--color-bg-elevated);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);color:var(--color-text-primary)}.btn:hover:not(:disabled){background:var(--color-bg-elevated-hover);transform:translateY(-2px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--primary{background:var(--gradient-teal);border:var(--border-teal)}.btn--primary:hover:not(:disabled){background:var(--gradient-teal-hover);border:var(--border-teal-hover);box-shadow:var(--shadow-glow-teal)}.btn--accent{background:var(--gradient-orange);border:var(--border-orange)}.btn--accent:hover:not(:disabled){background:var(--gradient-orange-hover);border:var(--border-orange-hover);box-shadow:var(--shadow-glow-orange)}.btn--danger{color:var(--color-accent-danger);border:var(--border-danger)}.btn--danger:hover:not(:disabled){background:#ff6b6b26;border:var(--border-danger-hover)}.btn--solid-primary{background:var(--gradient-teal-solid);border:none;box-shadow:var(--shadow-sm)}.btn--solid-primary:hover:not(:disabled){background:linear-gradient(135deg,#5eddd4,#3ed4c6);box-shadow:var(--shadow-glow-teal)}.btn--solid-danger{background:var(--gradient-danger-solid);border:none}.btn--solid-danger:hover:not(:disabled){background:linear-gradient(135deg,#ff7b7b,#f72d46);box-shadow:var(--shadow-glow-danger)}.btn--sm{padding:var(--space-xs) var(--space-sm);font-size:var(--font-size-xs)}.btn--lg{padding:var(--space-md) var(--space-lg);font-size:var(--font-size-md)}.btn--full{width:100%}.btn--uppercase{text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.card{padding:var(--space-lg);background:var(--glass-surface);border-radius:var(--radius-lg);border:1px solid var(--glass-border);border-top:1px solid rgba(255,255,255,.12);box-shadow:0 4px 24px -1px #0003;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.title-gradient{font-weight:var(--font-weight-extrabold);letter-spacing:var(--letter-spacing-tight);background:var(--gradient-text-title);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hint-box{position:absolute;background:#14141ce6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:var(--space-lg);border-radius:var(--radius-xl);border:var(--border-orange);box-shadow:var(--shadow-md);color:var(--color-text-primary);max-width:320px;z-index:var(--z-tooltip);animation:slideUp .4s var(--transition-pop);display:flex;flex-direction:column;gap:var(--space-md)}.hint-box p{margin:0;font-size:var(--font-size-base);line-height:var(--line-height-normal);color:#e2e8f0}.hint-box strong{color:var(--color-accent-orange);font-weight:var(--font-weight-bold)}*,*:before,*:after{box-sizing:border-box}:root{font-family:var(--font-family);line-height:var(--line-height-normal);font-weight:var(--font-weight-normal);color-scheme:light dark;color:var(--color-text-secondary);background-color:var(--color-bg-secondary);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background-color:var(--color-bg-primary);background-image:var(--gradient-mesh);background-attachment:fixed;background-size:cover;color:var(--color-text-primary);-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-touch-callout:none}#root{max-width:600px;margin:0 auto;text-align:center;width:100%;min-height:100vh;display:flex;flex-direction:column;justify-content:center}button{font-family:inherit}.achievement-toast-container{position:fixed;top:var(--space-lg);left:50%;transform:translate(-50%);z-index:9999;pointer-events:none}.achievement-toast{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:linear-gradient(135deg,#ffd70033,#ffaa0026);border:1px solid rgba(255,215,0,.4);border-radius:var(--radius-lg);box-shadow:0 4px 20px #ffd7004d,0 0 40px #ffd70026;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);min-width:280px;max-width:400px;opacity:0;transform:translateY(-20px) scale(.95);transition:all .3s cubic-bezier(.34,1.56,.64,1)}.achievement-toast.visible{opacity:1;transform:translateY(0) scale(1)}.achievement-toast.exiting{opacity:0;transform:translateY(-10px) scale(.98);transition:all .3s ease-out}.achievement-toast-icon{font-size:2.5rem;animation:achievementBounce .5s ease-out .2s}@keyframes achievementBounce{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.achievement-toast-content{display:flex;flex-direction:column;gap:2px}.achievement-toast-title{font-size:var(--font-size-xs);font-weight:var(--font-weight-bold);color:#ffd700e6;text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.achievement-toast-name{font-size:var(--font-size-lg);font-weight:var(--font-weight-bold);color:var(--color-text-primary)}.achievement-toast-desc{font-size:var(--font-size-sm);color:var(--color-text-muted)}.achievement-toast:before{content:"";position:absolute;inset:-1px;border-radius:inherit;background:linear-gradient(45deg,transparent 30%,rgba(255,215,0,.4) 50%,transparent 70%);background-size:200% 200%;animation:shimmer 2s ease-in-out infinite;z-index:-1}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.game-container{display:flex;flex-direction:column;align-items:center;gap:var(--space-xl);position:relative;padding:var(--space-md)}.game-header{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:var(--space-xs);z-index:var(--z-region)}.game-header h2{margin:0;font-family:var(--font-family-display);font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);background:linear-gradient(to right,#fff,#a5a5b5);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.header-spacer,.menu-btn,.sound-btn{display:none}.board{display:grid;grid-template-columns:repeat(var(--cols),var(--cell-size));grid-template-rows:repeat(var(--rows),var(--cell-size));gap:3px;padding:3px;background-color:var(--color-grid-bg);border-radius:var(--radius-lg);box-shadow:0 0 30px #00000080,inset 0 0 20px #00000080;-webkit-user-select:none;user-select:none;touch-action:none;position:relative;width:fit-content;height:fit-content;margin:0 auto}.cell{width:100%;height:100%;background-color:var(--color-tile-empty);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;position:relative;box-shadow:inset 1px 1px 2px #ffffff08,inset -1px -1px 2px #0003;transition:background-color .2s ease}.cell.wall{background:#6b7280;box-shadow:inset 2px 2px 4px #ffffff26,inset -2px -2px 4px #0000004d}.hint{font-size:var(--font-size-lg);font-weight:var(--font-weight-bold);color:var(--color-text-primary);pointer-events:none;z-index:var(--z-hint);text-shadow:0 2px 4px rgba(0,0,0,.5);transition:all var(--transition-normal);position:relative}.hint.error{color:#f44;transform:scale(1.1);text-shadow:0 0 10px rgba(255,0,0,.5)}.region{position:absolute;inset:1px;border-radius:var(--radius-sm);opacity:.9;z-index:var(--z-region);border:1px solid rgba(255,255,255,.15);box-shadow:inset 0 0 15px #0000001a,0 4px 10px #0003;transition:all var(--transition-normal)}.region.active{background-color:var(--color-selection-active)!important;border:2px solid var(--color-accent-teal);box-shadow:0 0 20px #4ecdc44d;z-index:var(--z-selection)}.region.success{animation:successPop .4s cubic-bezier(.175,.885,.32,1.275)}.region.error{background-color:#ff00001a!important;border:2px solid #ff4444;opacity:.6;box-shadow:none}.selection-ghost{position:absolute;inset:1px;background-color:#fff3;border:2px solid #fff;border-radius:var(--radius-xs);z-index:var(--z-selection);pointer-events:none;box-shadow:0 0 15px #fff3;transition:background-color .1s,border-color .1s}.selection-ghost.error{background-color:#f006!important;border:2px solid #ff0000!important;box-shadow:0 0 25px #f009;animation:pulseError .5s infinite alternate}.intro-hint-outline{position:absolute;inset:1px;border:2px dashed rgba(255,255,255,.5);border-radius:var(--radius-sm);pointer-events:none;z-index:12;overflow:visible}.intro-hand{position:absolute;font-size:1.8rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.4));animation:dragHand 2s ease-in-out infinite;z-index:20}@keyframes dragHand{0%,10%{top:0;left:0;opacity:1}50%{top:calc(100% - 24px);left:calc(100% - 24px);opacity:1}60%,to{top:calc(100% - 24px);left:calc(100% - 24px);opacity:0}}.win-modal-wrapper{position:fixed;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);pointer-events:auto;background:#000000bf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fadeIn var(--transition-normal) ease-out forwards}.win-modal{background:var(--color-bg-surface);padding:var(--space-xl) var(--space-2xl);border-radius:var(--radius-xl);border:var(--border-subtle);text-align:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow-lg);min-width:320px;max-width:min(90vw,500px);width:100%;transform-origin:center}.game-stats{display:flex;justify-content:center;gap:var(--space-xl);padding:var(--space-md) var(--space-lg);background:var(--color-bg-elevated);border-radius:var(--radius-lg);border:var(--border-subtle);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stat-item{display:flex;align-items:center;gap:var(--space-xs)}.stat-icon{font-size:var(--font-size-lg)}.stat-value{font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);font-variant-numeric:tabular-nums}.stat-label{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.bonus-time{color:#4ade80;font-weight:var(--font-weight-bold);font-size:var(--font-size-sm);margin-left:var(--space-xs)}.hint-btn{padding:var(--space-xs) var(--space-sm);font-size:var(--font-size-sm);background:#facc1526;border:1px solid rgba(250,204,21,.4);border-radius:var(--radius-sm);color:#facc15;cursor:pointer;transition:all var(--transition-normal)}.hint-btn:hover:not(:disabled){background:#facc1540;border-color:#facc1599}.hint-btn:disabled{opacity:.5;cursor:not-allowed}.hint-overlay{position:absolute;inset:2px;border:3px dashed #facc15;border-radius:var(--radius-sm);pointer-events:none;z-index:15;box-shadow:0 0 15px #facc1566}.stat-item.stars .stat-value{font-size:1.3rem;letter-spacing:2px}.controls{display:flex;gap:var(--space-md);justify-content:center;align-items:center;width:100%;margin-top:auto}.control-btn{min-width:48px;height:48px;padding:0 var(--space-lg);border-radius:var(--radius-lg);font-size:var(--font-size-sm);font-weight:var(--font-weight-bold);border:none;background:var(--color-bg-elevated);color:var(--color-text-primary);cursor:pointer;transition:all var(--transition-pop);display:flex;align-items:center;justify-content:center;gap:var(--space-sm);box-shadow:0 4px 12px #0000004d,inset 0 1px #ffffff1a;text-indent:0}.control-btn:after{content:none}.control-btn:hover:not(:disabled){background:var(--color-bg-elevated-hover);transform:translateY(-2px);box-shadow:0 6px 15px #0006}.control-btn:active:not(:disabled){transform:translateY(0)}.control-btn:disabled{opacity:.3;cursor:not-allowed;background:#ffffff05;box-shadow:none}.control-btn.hint-btn-control{background:#facc151a;color:#facc15;border:1px solid rgba(250,204,21,.3)}.control-btn.hint-btn-control:hover:not(:disabled){background:#facc1533;box-shadow:0 0 15px #facc154d}.win-stats{margin:var(--space-lg) 0;padding:var(--space-md);background:var(--color-bg-elevated);border-radius:var(--radius-md)}.win-stats p{margin:var(--space-xs) 0;font-size:var(--font-size-base);color:var(--color-text-muted)}.win-stars{font-size:var(--font-size-xl)!important;letter-spacing:4px;margin-top:var(--space-md)!important}.win-modal button{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);width:100%;padding:.875rem var(--space-lg);margin-top:var(--space-lg);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-normal);background:linear-gradient(135deg,#2ecc714d,#27ae6033);border:1px solid rgba(46,204,113,.4);color:#2ecc71}.win-modal button:hover{background:linear-gradient(135deg,#2ecc7166,#27ae604d);border-color:#2ecc7199;box-shadow:0 4px 15px #2ecc7133;transform:translateY(-2px)}.header-controls{display:flex;gap:var(--space-sm);align-items:center}.pause-btn{padding:var(--space-xs) var(--space-sm);font-size:var(--font-size-lg);background:var(--color-bg-elevated-hover);border:var(--border-medium);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-normal)}.pause-btn.icon-only{padding:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:12px}.pause-btn:hover{background:#ffffff26;border-color:#ffffff4d;transform:scale(1.05)}.pause-overlay{position:fixed;inset:0;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fadeIn var(--transition-normal) ease-out forwards}.pause-modal{background:var(--color-bg-surface);border:var(--border-light);border-radius:var(--radius-xl);padding:var(--space-xl);min-width:280px;max-width:min(90vw,500px);width:100%;text-align:center;box-shadow:var(--shadow-lg)}.pause-modal h2{margin:0 0 var(--space-lg) 0;font-size:var(--font-size-2xl);color:var(--color-text-primary)}.pause-menu-buttons{display:flex;flex-direction:column;gap:var(--space-sm)}.pause-menu-btn{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:.875rem var(--space-lg);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);border-radius:10px;border:var(--border-light);background:#ffffff14;color:var(--color-text-primary);cursor:pointer;transition:all var(--transition-normal)}.pause-menu-btn:hover{background:#ffffff1f;border-color:#ffffff40;transform:translateY(-2px)}.pause-menu-btn.primary{background:var(--gradient-teal-hover);border-color:#4ecdc466}.pause-menu-btn.primary:hover{background:linear-gradient(135deg,#4ecdc466,#2ec4b64d);border-color:#4ecdc499;box-shadow:var(--shadow-glow-teal)}.pause-menu-btn.danger{color:var(--color-accent-danger);border:var(--border-danger)}.pause-menu-btn.danger:hover{background:#ff6b6b26;border:var(--border-danger-hover)}.board.paused{opacity:.5;pointer-events:none}.game-over-buttons{display:flex;gap:var(--space-md);justify-content:center;margin-top:var(--space-lg)}.final-score{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary);margin:0}.tutorial-cursor{position:absolute;width:var(--cell-size);height:var(--cell-size);font-size:var(--font-size-2xl);pointer-events:none;z-index:var(--z-tooltip);left:calc(var(--gap) + (var(--start-col) * (var(--cell-size) + var(--gap))));top:calc(var(--gap) + (var(--start-row) * (var(--cell-size) + var(--gap))));display:flex;justify-content:center;align-items:center;transform-origin:center;animation:dragAction 2s infinite ease-in-out}@media(max-width:600px){.game-container{justify-content:flex-start;padding-top:var(--space-sm);padding-bottom:100px;height:100vh;height:100dvh;overflow:hidden}.board{margin:auto;aspect-ratio:auto;align-self:center}.controls{position:fixed;bottom:0;left:0;right:0;height:auto;padding:var(--space-md) var(--space-lg);background:#1a1a2ef2;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:var(--border-subtle);z-index:100;display:flex;justify-content:center;gap:var(--space-md);padding-bottom:max(var(--space-md),env(safe-area-inset-bottom));box-shadow:0 -10px 40px #00000080}.control-btn{width:auto;height:48px;font-size:var(--font-size-sm);flex:0 1 auto;min-width:80px}}.countdown-overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:1000;background:#000000d9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.countdown-number{font-size:clamp(5rem,15vw,10rem);font-weight:900;font-family:var(--font-family-display);color:#fff;text-shadow:0 0 20px #fff,0 0 40px var(--color-accent-teal, #4ECDC4),0 0 80px var(--color-accent-teal, #4ECDC4),0 0 120px var(--color-accent-teal, #4ECDC4);animation:countdownPulse .8s cubic-bezier(.2,.8,.2,1) forwards;line-height:1}.countdown-number.go{font-size:clamp(5rem,15vw,10rem);color:#fff;text-shadow:0 0 20px #fff,0 0 40px #4ade80,0 0 80px #4ade80,0 0 120px #4ade80;animation:countdownPulse .8s cubic-bezier(.2,.8,.2,1) forwards;line-height:1}@keyframes countdownPulse{0%{opacity:0;transform:scale(.3)}25%{opacity:1;transform:scale(1.15)}50%{transform:scale(.95)}75%{transform:scale(1.02)}to{opacity:.9;transform:scale(1)}}@keyframes goAppear{0%{opacity:0;transform:scale(.5)}30%{opacity:1;transform:scale(1.2)}50%{transform:scale(1)}80%{opacity:1}to{opacity:0;transform:scale(1)}}.board.locked{pointer-events:none;filter:blur(6px) brightness(.5);transition:filter .3s ease}.daily-puzzle .game-header h2{font-size:var(--font-size-lg)}.daily-info{display:flex;align-items:center;gap:var(--space-md);margin-top:calc(-1 * var(--space-md))}.daily-date{font-size:var(--font-size-sm);color:var(--color-text-muted);font-weight:var(--font-weight-medium)}.daily-streak{font-size:var(--font-size-sm);color:var(--color-accent-orange);font-weight:var(--font-weight-semibold)}.daily-win .streak-display{display:flex;flex-direction:column;align-items:center;margin:var(--space-md) 0;padding:var(--space-md);background:var(--gradient-orange);border-radius:var(--radius-lg);border:var(--border-orange)}.streak-number{font-size:var(--font-size-2xl);font-weight:var(--font-weight-extrabold);color:var(--color-accent-orange);line-height:var(--line-height-tight)}.streak-label{font-size:var(--font-size-sm);color:var(--color-text-muted);margin-top:var(--space-2xs)}.daily-buttons{display:flex;flex-direction:column;gap:var(--space-sm);margin-top:var(--space-md)}.daily-buttons button{width:100%}.share-btn{background:var(--gradient-teal-solid)!important;border:none!important;color:var(--color-text-primary)!important;font-weight:var(--font-weight-semibold);padding:.875rem var(--space-lg);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-normal)}.share-btn:hover{background:linear-gradient(135deg,#5eddd4,#3ed4c6)!important;box-shadow:var(--shadow-glow-teal);transform:translateY(-2px)}.start-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;padding:var(--space-xl)}.start-content{display:flex;flex-direction:column;align-items:center;gap:var(--space-xl);max-width:400px;width:100%}.game-title{font-size:var(--font-size-4xl);font-weight:var(--font-weight-extrabold);letter-spacing:var(--letter-spacing-tight);margin:0;text-align:center;display:flex;align-items:center;justify-content:center;gap:.15em}.title-zone{color:var(--color-text-primary)}.title-out{display:inline-block;background:var(--gradient-teal);border:var(--border-teal);border-radius:var(--radius-lg);padding:.05em .25em;color:var(--color-accent-teal);position:relative;box-shadow:var(--shadow-glow-teal)}.game-subtitle{color:var(--color-text-muted);font-size:var(--font-size-md);margin:-.5rem 0 0;text-align:center;letter-spacing:.02em}.settings-icon-btn{position:absolute;top:var(--space-lg);right:var(--space-lg);background:transparent;border:none;font-size:var(--font-size-xl);cursor:pointer;padding:var(--space-sm);border-radius:50%;transition:all var(--transition-normal);opacity:.6}.settings-icon-btn:hover{background:#ffffff1a;opacity:1;transform:rotate(90deg)}.danger-action{background:var(--gradient-danger-solid);width:100%}.mode-selection{display:flex;flex-direction:column;gap:var(--space-sm);width:100%}.mode-btn{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);border:var(--border-subtle);background:var(--color-bg-elevated);cursor:pointer;transition:all var(--transition-normal);text-align:left}.mode-btn:hover:not(:disabled){background:var(--color-bg-elevated-hover);border-color:#fff3;transform:translateY(-2px)}.mode-btn.primary{background:var(--gradient-teal);border:var(--border-teal)}.mode-btn.primary:hover{background:var(--gradient-teal-hover);border:var(--border-teal-hover);box-shadow:var(--shadow-glow-teal)}.mode-btn.continue{background:var(--gradient-orange);border:var(--border-orange)}.mode-btn.continue:hover{background:var(--gradient-orange-hover);border:var(--border-orange-hover);box-shadow:var(--shadow-glow-orange)}.mode-btn.daily{background:var(--gradient-purple);border:var(--border-purple)}.mode-btn.daily:hover{background:var(--gradient-purple-hover);border:var(--border-purple-hover);box-shadow:var(--shadow-glow-purple)}.mode-btn.disabled{opacity:.4;cursor:not-allowed}.mode-btn.locked{opacity:.5;cursor:not-allowed;filter:grayscale(.3)}.mode-btn.locked:hover{transform:none;box-shadow:none}.mode-btn.blitz{background:var(--gradient-danger);border:var(--border-danger)}.mode-btn.blitz:hover{background:var(--gradient-danger-hover);border:var(--border-danger-hover);box-shadow:var(--shadow-glow-danger)}.mode-btn.standard{background:var(--gradient-teal);border:var(--border-teal)}.mode-btn.standard:hover{background:var(--gradient-teal-hover);border:var(--border-teal-hover);box-shadow:var(--shadow-glow-teal)}.mode-btn.marathon{background:var(--gradient-marathon);border:1px solid rgba(114,9,183,.3)}.mode-btn.marathon:hover{background:var(--gradient-marathon-hover);border-color:#7209b780;box-shadow:0 4px 20px #7209b733}.mode-btn.time-attack{background:var(--gradient-orange);border:var(--border-orange)}.mode-btn.time-attack:hover{background:var(--gradient-orange-hover);border:var(--border-orange-hover);box-shadow:var(--shadow-glow-orange)}.mode-icon{font-size:var(--font-size-xl);width:40px;text-align:center}.mode-name{font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);flex:1}.mode-desc{font-size:var(--font-size-sm);color:var(--color-text-muted)}.stats-panel{width:100%;padding:var(--space-lg);background:var(--color-bg-elevated);border-radius:var(--radius-lg);border:var(--border-subtle)}.stats-panel h3{margin:0 0 var(--space-md) 0;font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md);width:100%}.stat{display:flex;flex-direction:column;gap:var(--space-2xs);align-items:center;text-align:center}.stat .stat-value{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary);line-height:1}.stat .stat-label{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.grid-stats-section{margin-top:var(--space-lg);padding-top:var(--space-md);border-top:var(--border-subtle)}.grid-stats-section h4{margin:0 0 var(--space-sm) 0;font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.grid-stats-list{display:flex;flex-direction:column;gap:var(--space-xs)}.grid-stat-item{display:flex;align-items:center;justify-content:space-between;padding:var(--space-xs) var(--space-sm);background:var(--color-bg-elevated);border-radius:var(--radius-md)}.grid-size{font-size:var(--font-size-base);font-weight:var(--font-weight-bold);color:var(--color-text-primary);min-width:50px}.grid-stat-details{display:flex;gap:var(--space-md);font-size:var(--font-size-sm);color:var(--color-text-muted)}.grid-stat-details span{display:flex;align-items:center;gap:var(--space-2xs)}.instructions{color:var(--color-text-muted);text-align:center;font-size:var(--font-size-sm)}.instructions p{margin:0;line-height:var(--line-height-relaxed)}.confirm-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn var(--transition-normal) ease-out forwards}.confirm-modal{background:var(--color-bg-surface);border:var(--border-light);border-radius:var(--radius-xl);padding:var(--space-xl);max-width:360px;width:90%;text-align:center;box-shadow:var(--shadow-lg);animation:popInBounce var(--transition-bounce) forwards}.confirm-modal h2{margin:0 0 var(--space-md) 0;font-size:var(--font-size-xl);color:var(--color-text-primary)}.confirm-modal p{margin:var(--space-xs) 0;color:var(--color-text-muted);font-size:var(--font-size-sm);line-height:var(--line-height-normal)}.confirm-modal strong{color:var(--color-text-primary)}.confirm-buttons{display:flex;gap:var(--space-sm);margin-top:var(--space-lg)}.settings-content{text-align:left;margin:var(--space-md) 0}.setting-item{padding:var(--space-md);background:#ff6b6b1a;border:1px solid rgba(255,107,107,.2);border-radius:var(--radius-md)}.setting-item p{margin:0 0 var(--space-md) 0;color:var(--color-text-secondary)}.confirm-btn{flex:1;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);cursor:pointer;transition:all var(--transition-normal)}.confirm-btn.cancel{background:var(--color-bg-elevated-hover);border:var(--border-medium);color:var(--color-text-primary)}.confirm-btn.cancel:hover{background:#ffffff26}.confirm-btn.confirm{background:var(--gradient-danger-solid);border:none;color:var(--color-text-primary)}.confirm-btn.confirm:hover{background:linear-gradient(135deg,#ff7b7b,#f72d46);box-shadow:var(--shadow-glow-danger)}.mode-btn.leaderboard{background:linear-gradient(135deg,#ffd70040,#ffaa0026);border:1px solid rgba(255,215,0,.3)}.mode-btn.leaderboard:hover{background:linear-gradient(135deg,#ffd70059,#ffaa0040);border-color:#ffd70080;box-shadow:0 4px 20px #ffd70033}.split-mode-btn{display:flex;gap:2px;width:100%}.split-mode-btn .mode-btn{border-radius:0}.split-mode-btn .mode-btn:first-child{border-radius:var(--radius-lg) 0 0 var(--radius-lg);flex:3}.split-mode-btn .mode-btn:last-child{border-radius:0 var(--radius-lg) var(--radius-lg) 0;flex:1;justify-content:center;padding:var(--space-md)}.split-mode-btn .mode-btn:last-child .mode-name{flex:none}.mode-btn.restart{background:#ffffff14;border:1px solid rgba(255,255,255,.15)}.mode-btn.restart:hover{background:#ffffff1f;border-color:#ffffff40}.profile-modal{background:var(--color-bg-surface);border:var(--border-light);border-radius:var(--radius-xl);padding:var(--space-lg);max-width:400px;width:90%;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:popInBounce var(--transition-bounce) forwards}.profile-modal h2{margin:0 0 var(--space-lg) 0;font-size:var(--font-size-xl);color:var(--color-text-primary);text-align:center}.profile-header{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-lg)}.profile-avatar-large{width:64px;height:64px;background:linear-gradient(135deg,#4ecdc4,#44a08d);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;color:#fff}.profile-avatar-large.guest{background:#fff3;color:#fff9}.profile-name{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-primary)}.profile-auth-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:#fffc;padding:.4rem 1rem;border-radius:20px;font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-normal)}.profile-auth-btn:hover{background:#ffffff26;border-color:#ffffff4d;color:#fff}.profile-auth-btn.danger{background:#ff6b6b26;border-color:#ff6b6b4d;color:#ff6b6b}.profile-auth-btn.danger:hover{background:#ff6b6b40;border-color:#ff6b6b80}.profile-name-row{display:flex;align-items:center;gap:var(--space-sm)}.edit-name-btn{background:transparent;border:none;cursor:pointer;font-size:var(--font-size-sm);opacity:.6;transition:opacity var(--transition-normal);padding:4px}.edit-name-btn:hover{opacity:1}.profile-name-edit{display:flex;flex-direction:column;gap:var(--space-sm);width:100%;max-width:200px}.profile-name-edit input{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.2);background:#ffffff1a;color:var(--color-text-primary);font-size:var(--font-size-base);text-align:center}.profile-name-edit input:focus{outline:none;border-color:#4ecdc480}.name-edit-buttons{display:flex;gap:var(--space-xs);justify-content:center}.name-edit-buttons button{padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);font-size:var(--font-size-xs);cursor:pointer;transition:all var(--transition-normal)}.name-edit-buttons button:first-child{background:transparent;border:1px solid rgba(255,255,255,.2);color:var(--color-text-muted)}.name-edit-buttons button:last-child{background:linear-gradient(135deg,#4ecdc4,#44a08d);border:none;color:#fff}.name-edit-buttons button:disabled{opacity:.5;cursor:not-allowed}.profile-section{border-top:var(--border-subtle);padding-top:var(--space-md);margin-top:var(--space-md)}.profile-section h4{margin:0 0 var(--space-sm) 0;font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:var(--letter-spacing-wide)}.profile-streak{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:linear-gradient(135deg,#ff6b0026,#ffaa001a);border:1px solid rgba(255,140,0,.3);border-radius:var(--radius-md);margin-top:var(--space-sm)}.profile-streak .streak-icon{font-size:var(--font-size-xl)}.profile-streak .streak-text{font-size:var(--font-size-sm);color:var(--color-text-primary)}.profile-streak .streak-value{font-weight:var(--font-weight-bold);color:#fa0}.profile-close-btn{width:100%;margin-top:var(--space-lg);padding:var(--space-sm) var(--space-md);background:var(--color-bg-elevated-hover);border:var(--border-medium);border-radius:var(--radius-md);color:var(--color-text-primary);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);cursor:pointer;transition:all var(--transition-normal)}.profile-close-btn:hover{background:#ffffff26}.setting-item.tracking-toggle{display:flex;align-items:center;justify-content:space-between;background:#4ecdc41a;border:1px solid rgba(78,205,196,.2);margin-top:var(--space-md)}.profile-section.danger-zone{border-top:none;margin-top:var(--space-lg)}.profile-section.danger-zone h4{color:var(--color-accent-danger);border-bottom:1px solid rgba(255,107,107,.3);padding-bottom:var(--space-xs);margin-bottom:var(--space-md)}.setting-label{display:flex;flex-direction:row;align-items:center;gap:var(--space-sm);text-align:left}.setting-label-row{display:flex;align-items:center;gap:var(--space-xs)}.setting-text{display:flex;flex-direction:column;gap:2px}.setting-icon{font-size:1.5rem}.setting-label span:first-child{color:var(--color-text-primary);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold)}.setting-hint{color:var(--color-text-muted);font-size:var(--font-size-xs);margin-left:0}.toggle-btn{padding:.4rem 1rem;border-radius:20px;font-size:var(--font-size-sm);font-weight:var(--font-weight-bold);cursor:pointer;transition:all var(--transition-normal);border:none}.toggle-btn.on{background:linear-gradient(135deg,#4ecdc4,#44a08d);color:#fff}.toggle-btn.off{background:#ffffff1a;color:#ffffff80}.auth-section{position:absolute;top:var(--space-lg);left:var(--space-lg)}.sign-in-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:#fffc;padding:.5rem 1rem;border-radius:20px;font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-normal);display:flex;align-items:center;gap:.5rem}.sign-in-btn:hover{background:#ffffff26;border-color:#ffffff4d;color:#fff}.user-profile-btn{background:linear-gradient(135deg,#4ecdc433,#44a08d33);border:1px solid rgba(78,205,196,.3);color:#fff;padding:.4rem .8rem;border-radius:20px;font-size:var(--font-size-sm);cursor:pointer;transition:all 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.score{color:#4ecdc4;font-weight:700;font-size:.9rem;white-space:nowrap}.leaderboard-row .stars,.leaderboard-row .best,.leaderboard-row .date{color:#ffffff80;font-size:.8rem;white-space:nowrap}.leaderboard-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:3rem;color:#fff9}.loading-spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.1);border-top-color:#4ecdc4;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.leaderboard-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:#fff9;text-align:center}.leaderboard-empty p:first-child{font-size:3rem;margin-bottom:.5rem}.leaderboard-empty .empty-hint{font-size:.85rem;color:#fff6;margin-top:.5rem}.leaderboard-footer{padding:1rem 1.5rem;border-top:1px solid rgba(255,255,255,.1);text-align:center}.privacy-note{color:#fff6;font-size:.75rem;margin:0}.beta-badge{display:inline-flex;align-items:center;padding:.15rem .5rem;background:linear-gradient(135deg,#7c3aed,#a855f7,#c084fc);border-radius:20px;font-size:.6rem;font-weight:700;letter-spacing:.05em;color:#fff;text-transform:uppercase;box-shadow:0 2px 8px #a855f766,inset 0 1px #fff3;flex-shrink:0;margin-left:.25rem}.holographic-name{background:linear-gradient(90deg,#ff6b6b,#ffa502,gold,#2ed573,#4ecdc4,#a855f7,#ff6b6b);background-size:200% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:holographic-shift 3s linear infinite;font-weight:600}@keyframes holographic-shift{0%{background-position:0% 50%}to{background-position:200% 50%}}@media(max-width:500px){.leaderboard-modal{max-height:90vh;border-radius:16px}.leaderboard-header{padding:1rem 1.25rem}.leaderboard-tabs{padding:.75rem 1rem;gap:.35rem}.tab-btn{padding:.6rem .25rem;font-size:.75rem}.time-attack-modes{padding:0 1rem .75rem;flex-wrap:wrap}.mode-chip{padding:.4rem .75rem;font-size:.7rem}.leaderboard-list{padding:.75rem 1rem}.leaderboard-row{padding:.75rem;grid-template-columns:32px 1fr auto auto;gap:.5rem}.leaderboard-row .rank{font-size:1rem}.leaderboard-row .score{font-size:.8rem}}