.app{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background:#000;color:#fff}.traffic-light{display:flex;flex-direction:column;align-items:center;background:#444;padding:20px;border-radius:10px;cursor:pointer}.light{width:80px;height:80px;border-radius:50%;margin:10px;background:#555;transition:background .3s;opacity:.3}.light.active{box-shadow:0 0 20px currentColor;opacity:1}.light.red{background:#ff0000}.light.orange{background:#ffa500}.light.green{background:#00ff00}.timer{margin-top:20px;font-size:24px}.party-info{margin-top:10px;font-size:14px;opacity:.7}