body{font-family:Arial,sans-serif;margin:0;display:flex;justify-content:center}.app{width:500px;text-align:center}.quiz{display:flex;flex-direction:column;gap:20px}.answers{display:flex;flex-direction:column;gap:10px}button{padding:10px;cursor:pointer}.selected{background:#4caf50;color:#fff}.result{display:flex;flex-direction:column;gap:10px}