#muehle-game-wrapper {
    width: 100%; max-width: 480px; margin: 40px auto;
    font-family: 'Segoe UI', sans-serif; position: relative;
    display: flex; flex-direction: column; align-items: center;
}
#stone-counter { width: 100%; display: flex; justify-content: space-between; margin-bottom: 12px; font-weight: bold; color: #0d47a1; text-shadow: 1px 1px 2px white; }
#canvas-wrapper {
    position: relative; width: 100%; aspect-ratio: 1/1;
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(179,229,252,0.7) 100%);
    border-radius: 20px; border: 2px solid white; box-shadow: 0 15px 35px rgba(0,0,0,0.1), inset 0 0 20px white; overflow: hidden;
}
.game-layer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
#status { font-weight: bold; margin: 20px 0; color: #1565c0; text-align: center; min-height: 1.2em; }
.button-group { display: flex; gap: 10px; width: 100%; }
#undoBtn, #resetBtn { flex: 1; padding: 12px; border: none; cursor: pointer; border-radius: 10px; font-weight: bold; color: white; transition: all 0.2s; }
#undoBtn { background: #607d8b; }
#resetBtn { background: #1565c0; }
#undoBtn:hover, #resetBtn:hover { opacity: 0.8; }