:root{--bg-color: #050505;--primary-color: #00ff41;--secondary-color: #ff00ff;--text-color: #ffffff;--font-family: "Press Start 2P", cursive}body.modern{--primary-color: #00d4ff;--secondary-color: #a855f7;--bg-color: #0a0e1a;--font-family: "Orbitron", sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{background-color:var(--bg-color);color:var(--text-color);font-family:var(--font-family);overflow:hidden;display:flex;justify-content:center;align-items:center;height:100vh;margin:0}#game-container{position:relative;width:100vw;height:100vh;display:flex;justify-content:center;align-items:center}canvas{background-color:#000;box-shadow:0 0 30px #00ff4133;border:1px solid rgba(0,255,65,.3)}body.modern canvas{box-shadow:0 0 40px #00d4ff26;border-color:#00d4ff33}