*{box-sizing:border-box;margin:0;padding:0}body{background:#111;color:#fff;font-family:sans-serif;overflow:hidden}#app{display:flex;height:100vh;width:100vw}#game-container{flex-grow:1;display:flex;align-items:center;justify-content:center;position:relative;background:#000}canvas{background:#222;box-shadow:0 0 20px #000c;max-width:100%;max-height:100%;object-fit:contain}#debug-panel{width:300px;background:#2a2a2a;border-left:2px solid #444;padding:20px;display:flex;flex-direction:column;gap:15px}#debug-panel h2{font-size:1.2rem;margin-bottom:10px;color:#0fc}#debug-panel label{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:.9rem}#debug-stats{margin-top:20px;font-family:monospace;color:#aaa}.hidden{display:none!important}#upgrade-menu{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#141419f2;border:2px solid #00ffcc;padding:40px;text-align:center;border-radius:10px;z-index:100;box-shadow:0 0 30px #00ffcc4d}#upgrade-menu h2{color:#0fc;margin-bottom:10px;font-size:2rem}.upgrade-options{display:flex;gap:20px;margin-top:30px}.upgrade-options button{background:#2a2a2a;border:1px solid #444;color:#fff;padding:15px 20px;font-size:1.1rem;cursor:pointer;border-radius:5px;transition:all .2s}.upgrade-options button:hover{background:#0fc;color:#000}