:root{--primary-color: #667eea;--secondary-color: #764ba2;--success-color: #48bb78;--danger-color: #f56565;--warning-color: #ed8936;--dark-color: #2d3748;--light-color: #f7fafc;--border-radius: 12px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}input,textarea{-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text;user-select:text}body{font-family:-apple-system,BlinkMacSystemFont,Segoe 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rgba(102,126,234,.5);display:flex;gap:30px;max-width:900px;width:100%;margin:20px;backdrop-filter:blur(10px);border:1px solid rgba(102,126,234,.3);animation:fadeIn .5s ease-out;position:relative}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.game-container:before{content:"";position:absolute;top:-2px;left:-2px;right:-2px;bottom:-2px;background:linear-gradient(45deg,var(--primary-color),var(--secondary-color),var(--success-color));border-radius:var(--border-radius);z-index:-1;opacity:.7;animation:neonPulse 2s ease-in-out infinite alternate}@keyframes neonPulse{0%{opacity:.5}to{opacity:.8}}.game-board{position:relative;flex-shrink:0}#tetris{border:3px solid var(--primary-color);background:#0a0a0a;border-radius:var(--border-radius);box-shadow:inset 0 0 30px rgba(102,126,234,.3),0 0 20px rgba(102,126,234,.5);image-rendering:pixelated;image-rendering:crisp-edges;touch-action:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;cursor:pointer}#particleCanvas,#lineClearCanvas{position:absolute;top:0;left:0;pointer-events:none;border-radius:var(--border-radius)}.info-panel{display:flex;flex-direction:column;gap:20px;min-width:200px;flex:1}.info-box{background:linear-gradient(135deg,rgba(45,55,72,.8),rgba(26,32,44,.8));padding:20px;border-radius:var(--border-radius);box-shadow:0 4px 6px rgba(0,0,0,.1);transition:var(--transition);border:1px solid rgba(102,126,234,.2);backdrop-filter:blur(5px)}.info-box:hover{transform:translateY(-2px);box-shadow:0 0 20px rgba(102,126,234,.3)}.info-box h3{margin-bottom:10px;color:var(--primary-color);font-size:18px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;text-shadow:0 0 10px rgba(102,126,234,.5)}.info-row{display:flex;justify-content:space-between;align-items:center;gap:15px}.info-label{font-size:16px;font-weight:600;color:var(--primary-color);text-transform:uppercase;letter-spacing:.5px;text-shadow:0 0 10px rgba(102,126,234,.5);white-space:nowrap}.score-display{font-size:28px;font-weight:700;color:var(--light-color);line-height:1;text-shadow:0 0 20px rgba(255,255,255,.5);animation:glow 2s ease-in-out infinite alternate;min-width:60px;text-align:right}@keyframes glow{0%{text-shadow:0 0 20px rgba(255,255,255,.5)}to{text-shadow:0 0 30px rgba(102,126,234,.8)}}.next-piece{width:100px;height:100px;background:#0a0a0a;border:2px solid var(--primary-color);border-radius:8px;margin:10px auto;position:relative;box-shadow:inset 0 0 10px rgba(102,126,234,.5),0 0 15px 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rgba(102,126,234,.3)}.btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:rgba(255,255,255,.3);transform:translate(-50%,-50%);transition:width .6s,height .6s;z-index:-1}.btn:hover:before{width:300px;height:300px}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(102,126,234,.6)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.game-over-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.9);display:none;justify-content:center;align-items:center;border-radius:var(--border-radius);backdrop-filter:blur(5px);animation:fadeIn .3s ease-out}.game-over-content{background:linear-gradient(135deg,rgba(45,55,72,.95),rgba(26,32,44,.95));padding:40px 32px 32px;border-radius:var(--border-radius);text-align:center;box-shadow:0 0 30px rgba(245,101,101,.5);border:1px solid rgba(245,101,101,.3);animation:slideUp .4s ease-out;display:flex;flex-direction:column;gap:22px}@keyframes 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