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#050c1459;transform:translateY(-2px)}.startmenu-btn:active{box-shadow:none;transform:translateY(0)}.startmenu-btn--primary{background:#63bb74;background:var(--wh-accent,#63bb74);border-color:#63bb74;border-color:var(--wh-accent,#63bb74);color:#162738;color:var(--wh-canvas,#162738)}.startmenu-btn--primary:hover{background:#53a865;background:var(--wh-accent-strong,#53a865);border-color:#53a865;border-color:var(--wh-accent-strong,#53a865)}.startmenu-btn--muted{background:#0000;border-color:#0000;color:#8ea19b;color:var(--wh-text-muted,#8ea19b);font-size:.9rem;padding:10px 20px}.startmenu-btn--muted:hover{background:#2c4459;background:var(--wh-elevated,#2c4459);border-color:#365266;border-color:var(--wh-border-subtle,#365266);box-shadow:none;color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd)}.startmenu-footer{color:#8ea19b;color:var(--wh-text-muted,#8ea19b);font-size:.76rem;letter-spacing:.02em;margin-top:34px;opacity:.55}@media (max-width:400px){.startmenu-logo{border-radius:10px;height:42px;margin-bottom:16px;width:42px}.startmenu-btn{font-size:.95rem;padding:12px 16px}}.howtoplay-backdrop{align-items:center;animation:backdropIn .2s ease both;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0a1420d1;display:flex;inset:0;justify-content:center;padding:16px;position:fixed;z-index:200}@keyframes backdropIn{0%{opacity:0}to{opacity:1}}.howtoplay-modal{animation:modalSlideUp .28s cubic-bezier(.22,1,.36,1) both;background:#213548;background:var(--wh-panel,#213548);border:1px solid #365266;border:1px solid var(--wh-border-subtle,#365266);border-radius:20px;box-shadow:0 24px 64px #030a128c;display:flex;flex-direction:column;max-height:88vh;max-width:560px;overflow:hidden;padding:28px 28px 20px;position:relative;width:100%}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.howtoplay-close{align-items:center;background:#2c4459;background:var(--wh-elevated,#2c4459);border:1px solid #365266;border:1px solid var(--wh-border-subtle,#365266);border-radius:50%;color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd);cursor:pointer;display:flex;flex-shrink:0;font-size:.85rem;height:32px;justify-content:center;position:absolute;right:16px;top:16px;transition:all .18s ease;width:32px}.howtoplay-close:hover{background:#d65a5a;background:var(--wh-danger,#d65a5a);border-color:#d65a5a;border-color:var(--wh-danger,#d65a5a);color:#fff}.howtoplay-title{-webkit-text-fill-color:#0000;background:linear-gradient(90deg,#63bb74,#e8d08e);background:linear-gradient(90deg,var(--wh-accent,#63bb74),var(--wh-premium,#e8d08e));-webkit-background-clip:text;background-clip:text;font-family:Sora,sans-serif;font-size:1.5rem;font-weight:700;margin:0 0 18px;padding-right:40px}.howtoplay-body{flex:1 1;overflow-y:auto;padding-right:6px;scrollbar-color:#4a6a80 #0000;scrollbar-color:var(--wh-border-strong,#4a6a80) #0000;scrollbar-width:thin}.howtoplay-body::-webkit-scrollbar{width:4px}.howtoplay-body::-webkit-scrollbar-track{background:#0000}.howtoplay-body::-webkit-scrollbar-thumb{background:#4a6a80;background:var(--wh-border-strong,#4a6a80);border-radius:2px}.howtoplay-section{border-bottom:1px solid #365266;border-bottom:1px solid var(--wh-border-subtle,#365266);margin-bottom:22px;padding-bottom:20px}.howtoplay-section:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.howtoplay-section h3{color:#e9f1e7;color:var(--wh-text-primary,#e9f1e7);font-family:Sora,sans-serif;font-size:.92rem;font-weight:600;margin:0 0 10px}.howtoplay-section p{color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd);font-size:.875rem;line-height:1.65;margin:0 0 8px}.howtoplay-section p:last-child{margin-bottom:0}.howtoplay-demo-row{display:flex;flex-wrap:wrap;gap:20px;margin-top:14px}.howtoplay-demo{flex:1 1;min-width:130px}.demo-label{color:#8ea19b!important;color:var(--wh-text-muted,#8ea19b)!important;font-size:.76rem!important;font-style:italic;margin:0 0 6px!important;text-align:center}.mini-grid{grid-gap:2px;display:grid;gap:2px;margin:0 auto;width:fit-content}.mini-cell{background:#162738e6;border:1px solid #365266;border:1px solid var(--wh-border-subtle,#365266);border-radius:2px;height:17px;width:17px}.mini-cell.filled{background:#2c4459;background:var(--wh-elevated,#2c4459);border-color:#4a6a80;border-color:var(--wh-border-strong,#4a6a80)}.mini-cell.clearing{background:#63bb74;background:var(--wh-accent,#63bb74);border-color:#63bb74;border-color:var(--wh-accent,#63bb74);box-shadow:0 0 5px #63bb74b3}.difficulty-list{display:flex;flex-direction:column;gap:9px;margin-top:6px}.diff-item{align-items:center;color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd);display:flex;font-size:.85rem;gap:10px}.diff-badge{border-radius:999px;flex-shrink:0;font-family:Sora,sans-serif;font-size:.7rem;font-weight:700;letter-spacing:.02em;padding:3px 9px;white-space:nowrap}.diff-easy{background:#59b0722e;border:1px solid #59b07261;color:#59b072;color:var(--wh-success,#59b072)}.diff-normal{background:#63bb742e;border:1px solid #63bb7459;color:#63bb74;color:var(--wh-accent,#63bb74)}.diff-hard{background:#d5a34226;border:1px solid #d5a34259;color:#d5a342;color:var(--wh-warning,#d5a342)}.diff-extreme{background:#d65a5a26;border:1px solid #d65a5a59;color:#d65a5a;color:var(--wh-danger,#d65a5a)}.tips-list{margin:6px 0 0;padding-left:18px}.tips-list li{color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd);font-size:.875rem;line-height:1.65;margin-bottom:7px}.tips-list li:last-child{margin-bottom:0}.key-list{grid-gap:10px;display:grid;gap:10px;grid-template-columns:1fr 1fr;margin-top:8px}.key-item{align-items:center;color:#b3c1bd;color:var(--wh-text-secondary,#b3c1bd);display:flex;font-size:.85rem;gap:8px}.howtoplay-section kbd{background:#2c4459;background:var(--wh-elevated,#2c4459);border:1px solid #4a6a80;border:solid var(--wh-border-strong,#4a6a80);border-radius:4px;border-width:1px 1px 2px;color:#e9f1e7;color:var(--wh-text-primary,#e9f1e7);flex-shrink:0;font-family:JetBrains Mono,Courier New,monospace;font-size:.72rem;padding:2px 7px;white-space:nowrap}.howtoplay-got-it{background:#63bb74;background:var(--wh-accent,#63bb74);border:none;border-radius:10px;color:#162738;color:var(--wh-canvas,#162738);cursor:pointer;display:block;flex-shrink:0;font-family:Sora,sans-serif;font-size:.95rem;font-weight:700;margin-top:20px;padding:13px;transition:background .2s ease,transform .14s ease;width:100%}.howtoplay-got-it:hover{background:#53a865;background:var(--wh-accent-strong,#53a865);transform:translateY(-1px)}.howtoplay-got-it:active{transform:translateY(0)}@media (max-width:500px){.howtoplay-modal{border-radius:16px;max-height:92vh;padding:20px 16px 16px}.howtoplay-title{font-size:1.25rem}.key-list{grid-template-columns:1fr}.howtoplay-demo-row{gap:14px}}:root{--wh-canvas:#162738;--wh-panel:#213548;--wh-elevated:#2c4459;--wh-text-primary:#e9f1e7;--wh-text-secondary:#b3c1bd;--wh-text-muted:#8ea19b;--wh-accent:#63bb74;--wh-accent-strong:#53a865;--wh-premium:#e8d08e;--wh-danger:#d65a5a;--wh-warning:#d5a342;--wh-success:#59b072;--wh-border-subtle:#365266;--wh-border-strong:#4a6a80;--wh-shadow-soft:0 8px 24px #050c1447;--wh-shadow-elevated:0 14px 40px #030a125c;--primary-bg:var(--wh-canvas);--primary-color:var(--wh-text-primary);--accent-color:var(--wh-accent);--accent-color-rgb:99,187,116;--accent-hover:var(--wh-accent-strong);--secondary-color:var(--wh-premium);--tertiary-color:var(--wh-premium);--tertiary-color-rgb:232,208,142;--success-color:var(--wh-success);--error-color:var(--wh-danger);--dark-bg:var(--wh-canvas);--dark-secondary:var(--wh-panel);--dark-text:var(--wh-text-primary);--dark-cell:var(--wh-elevated);--cell-size:clamp(20px,8vw,40px);--cell-size-mobile:30px;--header-height:clamp(60px,10vh,100px);--grid-size:clamp(300px,80vw,600px);--cell-size:clamp(25px,calc(var(--grid-size)/12),40px);--shape-cell-size:clamp(12px,5vw,20px);--max-game-width:min(95vw,1200px);--min-game-width:min(95vw,300px);--game-padding:clamp(10px,2vw,30px);--grid-gap:clamp(2px,0.5vw,4px);--menu-width:clamp(250px,90vw,400px);--wh-easing:cubic-bezier(0.22,1,0.36,1);--wh-motion-fast:140ms;--wh-motion-base:220ms;--wh-motion-slow:360ms;--transition-speed:0.3s;--animation-timing:cubic-bezier(0.175,0.885,0.32,1.275);--card-shadow:var(--wh-shadow-soft);--hover-shadow:var(--wh-shadow-elevated);--inner-shadow:inset 0 2px 5px #0003;--text-shadow:none;--glow-effect:0 0 15px var(--wh-accent);--card-bg:var(--wh-panel);--card-radius:14px;--base-shadow:var(--wh-shadow-soft)}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;align-items:flex-start;background:#162738;background:var(--wh-canvas);color:#e9f1e7;color:var(--wh-text-primary);display:flex;font-family:Manrope,-apple-system,BlinkMacSystemFont,sans-serif;justify-content:center;margin:0;min-height:100vh;min-height:-webkit-fill-available;overflow-x:hidden}.App{background:#213548;background:var(--wh-panel);border:1px solid #365266;border:1px solid var(--wh-border-subtle);border-radius:20px;flex-direction:column;gap:.75rem;margin:10px auto;max-width:min(95vw,1200px);max-width:var(--max-game-width);min-height:calc(100vh - 20px);min-width:min(95vw,300px);min-width:var(--min-game-width);overflow-x:hidden;padding:clamp(10px,2vw,30px);padding:var(--game-padding);text-align:center}.App,.app-header{box-shadow:0 8px 24px #050c1447;box-shadow:var(--wh-shadow-soft);display:flex}.app-header{align-items:center;background:#2c4459;background:var(--wh-elevated);border:1px solid #365266;border:1px solid var(--wh-border-subtle);border-radius:16px;gap:1rem;height:auto;justify-content:space-between;margin-bottom:1rem;min-height:60px;padding:1rem 1.5rem}.header-left{align-items:center;display:flex;gap:.75rem}.app-header h1{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#63bb74,#e8d08e);background:linear-gradient(135deg,var(--wh-accent),var(--wh-premium));-webkit-background-clip:text;background-clip:text;font-family:Sora,sans-serif;font-size:clamp(1.8rem,4vw,2.5rem);font-weight:700;letter-spacing:-.03em;margin:0}.header-right{align-items:center;display:flex;gap:1rem}.loader-logo{flex-shrink:0;margin:0}.gear-icon{align-items:center;background:#162738b8;border:1px solid #365266;border:1px solid var(--wh-border-subtle);border-radius:8px;color:#b3c1bd;color:var(--wh-text-secondary);cursor:pointer;display:inline-flex;flex-shrink:0;font-size:1.25rem;height:42px;justify-content:center;line-height:1;padding:0;transition:background-color .22s cubic-bezier(.22,1,.36,1),border-color .22s,color .22s;width:42px}.gear-icon:hover{background-color:#2c4459;background-color:var(--wh-elevated);border-color:#4a6a80;border-color:var(--wh-border-strong);color:#e9f1e7;color:var(--wh-text-primary)}.header-score{background:#162738;background:var(--wh-canvas);border:1px solid #365266;border:1px solid var(--wh-border-subtle);border-radius:8px;color:#e9f1e7;color:var(--wh-text-primary);font-size:1.2rem;font-weight:700;justify-content:flex-end}.header-score,.header-score .score-board{align-items:center;box-shadow:0 8px 24px #050c1447;box-shadow:var(--wh-shadow-soft);display:flex;flex-direction:row;padding:.5rem 1rem}.header-score .score-board{background:#213548;background:var(--wh-panel);border-radius:8px;font-size:1rem;gap:1.5rem;margin:0;transition:all .3s ease;transition:all var(--transition-speed) ease;white-space:nowrap}.header-score .score-board:hover{border-color:#4a6a80;border-color:var(--wh-border-strong)}.dark-mode .header-score .score-board:hover,.header-score .score-board:hover{background:#2c4459;background:var(--wh-elevated)}.header-score .score-value{transition:color .3s ease;transition:color var(--transition-speed) ease}.header-score .score-board:hover .score-value{color:#e8d08e;color:var(--secondary-color)}.header-score .score-item{align-items:center;display:flex;flex-direction:column;min-width:0}.header-score .score-label{font-size:.8rem;font-weight:500;margin-bottom:.2rem;opacity:.9;text-shadow:0 1px 2px #0000004d}.header-score .score-value{color:#63bb74;color:var(--accent-color);font-size:1.1rem;font-weight:700;text-shadow:0 1px 2px #00000080}.loader-logo{background-color:#63bb74;background-color:var(--accent-color);height:30px;justify-self:center;margin:0 .5rem;position:relative;width:30px}.loader-logo.animate-line-clear{animation:lineClearAnimation 1.5s ease-in-out;box-shadow:0 0 20px #63bb74;box-shadow:0 0 20px var(--accent-color)}@keyframes lineClearAnimation{0%{background-color:#63bb74;background-color:var(--accent-color);box-shadow:0 0 5px #63bb74;box-shadow:0 0 5px var(--accent-color);transform:scale(1) rotate(0deg)}20%{background-color:#fc0;box-shadow:0 0 25px #fc0,0 0 40px #63bb74;box-shadow:0 0 25px #fc0,0 0 40px var(--accent-color);transform:scale(1.5) rotate(90deg)}40%{background-color:#ff6b6b;box-shadow:0 0 20px #ff6b6b;transform:scale(1.2) rotate(180deg)}60%{background-color:#4ade80;box-shadow:0 0 30px #4ade80,0 0 50px #63bb74;box-shadow:0 0 30px #4ade80,0 0 50px var(--accent-color);transform:scale(1.8) rotate(270deg)}80%{background-color:#a78bfa;box-shadow:0 0 25px #a78bfa;transform:scale(1.4) rotate(1turn)}to{background-color:#63bb74;background-color:var(--accent-color);box-shadow:0 0 5px #63bb74;box-shadow:0 0 5px var(--accent-color);transform:scale(1) rotate(0deg)}}@keyframes cellClearedEffect{0%{box-shadow:0 0 8px 2px #ffd700b3;transform:scale(1.05)}50%{box-shadow:0 0 15px 5px gold;transform:scale(1.1)}to{box-shadow:0 0 8px 2px #ffd700b3;transform:scale(1.05)}}.cell-cleared{animation:cellClearedEffect .3s ease-in-out}@keyframes cellDisappearEffect{0%{opacity:1;transform:scale(1.05)}to{opacity:0;transform:scale(.3)}}.cell-disappear{animation:cellDisappearEffect .5s ease-out forwards;animation-delay:.1s}.grid-board,.grid-board-container{box-sizing:border-box}.grid-board{grid-gap:clamp(2px,.8vw,3px);aspect-ratio:1;background:#0000;border-radius:15px;box-shadow:none;display:grid;gap:clamp(2px,.8vw,3px);grid-template-columns:repeat(10,1fr);grid-template-rows:repeat(10,1fr);height:100%;overflow:hidden;padding:clamp(8px,2vw,10px);position:relative;width:100%}.grid-board:before{background:radial-gradient(circle at center,#0000 60%,#e8d08e0f);background:radial-gradient(circle at center,#0000 60%,rgba(var(--tertiary-color-rgb),.06));content:"";inset:0;pointer-events:none;position:absolute;z-index:0}.grid-cell{background-color:#16273899;border:1px solid #365266;border:1px solid var(--wh-border-subtle);border-radius:3px;box-shadow:none;box-sizing:border-box;height:100%;overflow:hidden;position:relative;transition:all .22s cubic-bezier(.22,1,.36,1);width:100%;z-index:1}.grid-cell:after{display:none}.grid-cell.filled{border-color:#0000;box-shadow:none;transform:scale(.95);z-index:2}.grid-cell.preview{animation:pulse 1.5s infinite alternate;background-color:#63bb744d;background-color:rgba(var(--accent-color-rgb),.3);border:none;box-shadow:0 0 20px #63bb7480;box-shadow:0 0 20px rgba(var(--accent-color-rgb),.5);box-sizing:border-box;outline:3px dashed #63bb74;outline:3px dashed var(--accent-color);outline-offset:-1px;position:relative;transform:scale(1);z-index:5}.grid-cell.preview.invalid{animation:shakeInvalid .5s ease-in-out;background-color:#ff52524d;box-shadow:0 0 20px #ff525280;outline:3px dashed #ff5252}.grid-cell.preview.invalid:before{border-color:#ff5252;opacity:.8}@keyframes shakeInvalid{0%,to{transform:translateX(0)}25%{transform:translateX(-2px)}75%{transform:translateX(2px)}}.grid-cell.preview.valid{animation:pulseValid 1s infinite alternate;background-color:#4caf504d;box-shadow:0 0 20px #4caf5080;outline:3px dashed #4caf50}.grid-cell.preview.valid:before{border-color:#4caf50;opacity:.6}@keyframes pulseValid{0%{opacity:.8;transform:scale(.98)}to{opacity:1;transform:scale(1.02)}}@keyframes pulse{0%{opacity:.7;transform:scale(.98)}to{opacity:1;transform:scale(1.02)}}.grid-cell.preview:before{background:#0000;border:2px solid #fff;border-radius:inherit;content:"";inset:-2px;opacity:.5;pointer-events:none;position:absolute;z-index:6}.dark-mode{background:#162738;background:var(--wh-canvas)}.dark-mode .App{background:#213548;background:var(--wh-panel)}.dark-mode .App,.dark-mode .app-header{border:1px solid #365266;border:1px solid var(--wh-border-subtle)}.dark-mode .app-header{background:#2c4459;background:var(--wh-elevated)}.dark-mode .grid-board-container{background:#162738;background:var(--wh-canvas)}.dark-mode .grid-board-container,.dark-mode .shapes-container{border:1px solid #365266;border:1px solid var(--wh-border-subtle)}.dark-mode .shapes-container{background:#213548;background:var(--wh-panel)}.dark-mode .shape-preview{background:#2c4459;background:var(--wh-elevated);border:1px solid #365266;border:1px solid var(--wh-border-subtle)}.dark-mode .grid-cell.preview{background-color:#63bb7466;background-color:rgba(var(--accent-color-rgb),.4);border-color:#63bb74;border-color:var(--accent-color)}.dark-mode .grid-cell.preview:before{border-color:#fffc;opacity:.6}@keyframes cellHighlight{0%{border-color:#0000;box-shadow:none;filter:brightness(1)}20%{border-color:#63bb74;border-color:var(--wh-accent);box-shadow:0 0 0 2px #63bb74,0 0 14px 4px #63bb74cc,inset 0 0 8px #63bb7466;box-shadow:0 0 0 2px var(--wh-accent),0 0 14px 4px #63bb74cc,inset 0 0 8px #63bb7466;filter:brightness(1.6)}55%{border-color:#e8d08e;border-color:var(--wh-premium);box-shadow:0 0 0 2px #e8d08e,0 0 22px 6px #e8d08ebf,inset 0 0 12px #e8d08e73;box-shadow:0 0 0 2px var(--wh-premium),0 0 22px 6px #e8d08ebf,inset 0 0 12px #e8d08e73;filter:brightness(2.1)}80%{border-color:#63bb74;border-color:var(--wh-accent);box-shadow:0 0 0 2px #63bb74,0 0 16px 4px #63bb74bf,inset 0 0 10px #63bb7466;box-shadow:0 0 0 2px var(--wh-accent),0 0 16px 4px #63bb74bf,inset 0 0 10px #63bb7466;filter:brightness(1.7)}to{border-color:#63bb74;border-color:var(--wh-accent);box-shadow:0 0 0 1px #63bb74,0 0 8px 2px #63bb748c;box-shadow:0 0 0 1px var(--wh-accent),0 0 8px 2px #63bb748c;filter:brightness(1.4)}}@keyframes cellDisappear{0%{box-shadow:0 0 0 1px #63bb74,0 0 8px 2px #63bb748c;box-shadow:0 0 0 1px var(--wh-accent),0 0 8px 2px #63bb748c;filter:brightness(1.4);opacity:1;transform:scale(1)}38%{box-shadow:0 0 0 2px #63bb74,0 0 18px 5px #63bb74bf;box-shadow:0 0 0 2px var(--wh-accent),0 0 18px 5px #63bb74bf;filter:brightness(2);opacity:.9;transform:scale(1.14)}to{box-shadow:none;filter:brightness(2.5);opacity:0;transform:scale(0)}}.grid-cell.cell-cleared{animation:cellHighlight .5s cubic-bezier(.22,1,.36,1) 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