:root{--primary-color: #7d8cc4;--primary-hover: #6a79b2;--bg-gradient: linear-gradient(135deg, #eef2f7 0%, #dbe2ef 100%);--panel-bg: rgba(255, 255, 255, .65);--panel-border: rgba(255, 255, 255, .45);--text-main: #3f4e6b;--text-sub: #7a889f;--shadow-main: 0 10px 30px rgba(125, 140, 196, .12)}body{margin:0;padding:20px;font-family:Segoe UI,-apple-system,BlinkMacSystemFont,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background:var(--bg-gradient);color:var(--text-main);display:flex;justify-content:center;align-items:center;min-height:100vh;box-sizing:border-box}#app{text-align:center;background:var(--panel-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--panel-border);padding:25px;border-radius:24px;box-shadow:var(--shadow-main);max-width:840px;width:100%;transition:transform .3s ease}header{margin-bottom:15px}header h1{margin:0 0 4px;font-size:26px;font-weight:700;letter-spacing:-.5px;background:linear-gradient(45deg,#5c6bc0,#7d8cc4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.subtitle{color:var(--text-sub);margin:0;font-size:13px;font-weight:500}#game-canvas{background:transparent;border:1px solid var(--panel-border);border-radius:16px;display:block;margin:0 auto 20px;cursor:pointer;box-shadow:0 8px 24px #7d8cc414;max-width:100%;transition:border-color .3s ease}#game-canvas:hover{border-color:#7d8cc466}#controls{display:flex;flex-direction:column;gap:15px;align-items:center}.control-group{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}.control-group label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-sub);min-width:90px;text-align:right}.btn-toggle{display:flex;background:#7d8cc414;padding:3px;border-radius:10px;gap:2px}button{background:transparent;color:var(--text-main);border:none;padding:8px 18px;font-size:13px;font-weight:600;border-radius:8px;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);display:inline-flex;align-items:center;justify-content:center;gap:6px}button:hover{background:#7d8cc414;transform:translateY(-1px)}button:active{transform:translateY(1px)}button.primary-btn{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 12px #7d8cc440}button.primary-btn:hover{background-color:var(--primary-hover);box-shadow:0 4px 16px #7d8cc459}button.secondary-btn{background:#ffffffa6;border:1px solid var(--panel-border);box-shadow:0 2px 6px #00000005}button.secondary-btn:hover{background:#fffffff2;border-color:#7d8cc44d}.btn-toggle button{border-radius:7px;padding:5px 12px;font-size:12px;font-weight:600}.btn-toggle button:hover{transform:none;background:#ffffff59}.btn-toggle button.active{background:#fff;color:var(--primary-color);box-shadow:0 2px 8px #7d8cc426;font-weight:700}.slider-group{display:flex;flex-direction:row;align-items:center;gap:12px;width:100%;max-width:380px}.slider-group label{min-width:150px;text-align:right;font-size:12px}.slider-group input[type=range]{-webkit-appearance:none;flex-grow:1;height:6px;background:#7d8cc426;border-radius:3px;outline:none;cursor:pointer}.slider-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--primary-color);box-shadow:0 2px 6px #7d8cc466;transition:transform .15s,background-color .15s}.slider-group input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2);background-color:var(--primary-hover)}