:root{--primary:#C1FF00;--bg-dark:#050505;--text-main:#ffffff;--text-muted:#888888}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Press Start 2P',cursive;background-color:var(--bg-dark);color:var(--text-main);display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden}.game-container{position:relative;width:100%;max-width:800px;display:flex;flex-direction:column;align-items:center}.header{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:0 20px}.back-btn{color:var(--text-muted);text-decoration:none;font-size:12px;font-family:sans-serif;text-transform:uppercase;transition:color .3s}.back-btn:hover{color:var(--primary)}h1{font-size:24px;color:var(--primary);text-shadow:2px 2px 0 rgba(0,0,0,.5)}.score-container{font-size:16px;color:var(--text-muted)}#current-score{color:var(--text-main);margin-left:10px}canvas{background-color:#111;border-bottom:2px solid var(--text-muted);width:100%;max-width:800px;height:300px;image-rendering:pixelated}#game-over-screen{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;background:rgba(0,0,0,.8);padding:20px;border:2px solid var(--primary);border-radius:10px;display:none}#game-over-screen.hidden{display:none}#game-over-screen h2{color:var(--primary);margin-bottom:15px;font-size:24px}#game-over-screen p{font-size:12px;line-height:1.5}.controls-hint{margin-top:20px;font-size:10px;color:var(--text-muted);font-family:sans-serif}