body {
  margin: 0;
  height: 100vh;
  background-color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
}

.timer-container {
  text-align: center;
}

.label {
  font-size: 40px;
  color: #555;
  margin-bottom: 10px;
}

#raceLabel {
  font-size: 80px;
  font-weight: bold;
  color: #000;
  margin-bottom: 10px;
}

.time {
  font-size: 120px;
  font-weight: bold;
  color: #333;
}

button#enableVoice {
  background-color: #4CAF50; /* グリーン系で明確に */
  color: white;
  font-size: 24px;
  font-weight: bold;
  border: none;
  border-radius: 10px;
  padding: 15px 40px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
}

button#enableVoice:hover {
  background-color: #45a049;
  transform: translateY(-2px);
}

button#enableVoice:active {
  transform: translateY(2px);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}