#f1-reflex-app{text-align:center;font-family:Arial,sans-serif;margin:20px auto}.lights{display:flex;justify-content:center;gap:10px;margin:20px}.light{width:40px;height:40px;border-radius:50%;background:#333;border:2px solid #111}.light.on{background:red}#message{margin-top:20px;font-size:18px}#reactionTime{margin-top:10px;font-weight:700;font-size:20px}#startButton,#saveButton{padding:10px 20px;font-size:16px;cursor:pointer;margin-top:10px}#leaderboard{text-align:left;display:inline-block;margin-top:20px}#playerName{padding:8px;font-size:16px;margin-right:5px}