body {
            margin: 0;
            overflow: hidden;
            background-color: #111;
        }
        canvas {
            display: block;
        }

        /* --- ÚJ: HUD KILÉPÉS GOMB STÍLUSA --- */
        #hud-exit-btn {
            position: absolute;
            top: 20px;
            right: 20px; /* Jobb felső sarok */
            background: rgba(0, 0, 0, 0.6);
            border: 2px solid #ff0055;
            color: #ff0055;
            padding: 10px 20px;
            font-family: 'Arial', sans-serif;
            font-weight: bold;
            font-size: 16px;
            cursor: pointer;
            z-index: 9999; /* Minden felett */
            text-transform: uppercase;
            box-shadow: 0 0 10px #ff0055;
            transition: all 0.3s;
        }
        #hud-exit-btn:hover {
            background: #ff0055;
            color: white;
            box-shadow: 0 0 20px #ff0055;
        }