*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;overflow:hidden;background:#111}.app{width:100vw;height:100vh;position:relative;background:#111}.start-screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);z-index:1000}.start-screen h1{font-size:4rem;color:#fff;margin-bottom:2rem;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.start-screen input{padding:1rem 2rem;font-size:1.2rem;border:none;border-radius:5px;margin-bottom:1rem;width:300px;text-align:center}.start-screen button{padding:1rem 3rem;font-size:1.2rem;background:#fff;color:#667eea;border:none;border-radius:5px;cursor:pointer;font-weight:700;transition:transform .2s}.start-screen button:hover{transform:scale(1.05)}.start-screen button:active{transform:scale(.95)}.game-canvas{display:block;background:#f0f0f0;cursor:none}.leaderboard{position:absolute;top:20px;right:20px;background:#000000b3;color:#fff;padding:15px;border-radius:10px;min-width:200px;font-family:monospace;z-index:100}.leaderboard h3{margin-bottom:10px;text-align:center;border-bottom:2px solid #667eea;padding-bottom:5px}.leaderboard ol{list-style-position:inside;padding:0}.leaderboard li{padding:5px 0;border-bottom:1px solid rgba(255,255,255,.1)}.leaderboard li:last-child{border-bottom:none}.score-display{position:absolute;top:20px;left:20px;background:#000000b3;color:#fff;padding:15px 25px;border-radius:10px;font-size:1.5rem;font-weight:700;font-family:monospace;z-index:100}.connection-status{position:absolute;bottom:20px;left:20px;padding:10px 15px;border-radius:5px;font-size:.9rem;font-weight:700;z-index:100}.connection-status.connected{background:#4caf50cc;color:#fff}.connection-status.disconnected{background:#f44336cc;color:#fff}.death-screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#000c;z-index:999}.death-screen h2{font-size:3rem;color:#ff6b6b;margin-bottom:1rem}.death-screen p{font-size:1.5rem;color:#fff;margin-bottom:2rem}.death-screen button{padding:1rem 3rem;font-size:1.2rem;background:#667eea;color:#fff;border:none;border-radius:5px;cursor:pointer;font-weight:700;transition:transform .2s}.death-screen button:hover{transform:scale(1.05)}