*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:#667eea;color:#fff}#game-canvas{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1}.hidden{display:none!important}.overlay{position:fixed;top:0;left:0;width:100%;height:100%;z-index:100;display:flex;justify-content:center;align-items:center;background:#000c}.start-panel{background:#fff;padding:40px;border-radius:15px;max-width:400px;width:90%;box-shadow:0 10px 30px #0000004d}.game-title{font-size:2.5em;font-weight:700;color:#667eea;margin-bottom:10px;text-align:center}.game-subtitle{font-size:1.1em;color:#666;margin-bottom:30px;text-align:center}.input-group{margin-bottom:20px}.input-group label{display:block;font-size:.9em;font-weight:600;color:#333;margin-bottom:8px}.input-group input{width:100%;padding:12px;font-size:1em;border:2px solid #ddd;border-radius:8px;outline:none;color:#333}.input-group input:focus{border-color:#667eea}.join-btn{width:100%;padding:14px;font-size:1.1em;font-weight:700;color:#fff;background:#667eea;border:none;border-radius:8px;cursor:pointer;margin-top:10px}.join-btn:hover{opacity:.9}.join-btn:disabled{opacity:.5;cursor:not-allowed}.error-message{margin-top:15px;padding:12px;background:#ffe6e6;border:2px solid #ff4444;border-radius:8px;color:#c00;font-size:.9em}.connection-status{margin-top:20px;padding:10px;background:#f5f5f5;border-radius:8px;text-align:center;font-size:.85em;color:#666}.status-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#ff9800;margin-right:8px}.status-dot.connected{background:#4caf50}.status-dot.disconnected{background:#f44336}.scoreboard{position:fixed;top:20px;right:20px;width:250px;background:#000c;border-radius:10px;z-index:50;overflow:hidden}.scoreboard-header{background:#667eea;padding:15px;text-align:center}.scoreboard-header h2{font-size:1.2em;font-weight:700;color:#fff;margin:0}.scoreboard-list{padding:10px;max-height:400px;overflow-y:auto}.player-item{display:flex;align-items:center;padding:10px;margin-bottom:5px;background:#ffffff1a;border-radius:8px;border-left:3px solid transparent}.player-item.me{background:#667eea4d;border-left-color:#667eea}.player-rank{font-size:1em;font-weight:700;color:gold;min-width:25px;text-align:center}.player-color{width:18px;height:18px;border-radius:50%;margin:0 10px;border:2px solid rgba(255,255,255,.5)}.player-info{flex:1}.player-nickname{font-size:.9em;font-weight:600;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-score{font-size:.8em;color:#ffffffb3}.scoreboard-empty{padding:20px;text-align:center;color:#ffffff80;font-size:.9em}