body {
  background: #f8f9fa;
  font-family: 'Helvetica Neue', sans-serif;
  color: #333;
  padding: 2em;
  max-width: 700px;
  margin: auto;
  line-height: 1.6;
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 1em;
}

#currentSong {
  font-weight: bold;
  background: #e0f7fa;
  padding: 0.8em;
  border-radius: 8px;
  text-align: center;
  font-size: 1.2em;
  margin-bottom: 1em;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  justify-content: center;
  margin-bottom: 1em;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 0.7em 1.2em;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #0056b3;
}

audio {
  width: 100%;
  margin-top: 1em;
}

#announce {
 white-space: pre-line; /* 改行文字を有効にする */
  margin-top: 2em;
  font-weight: bold;
  background: #fff3cd;
  padding: 1em;
  border-left: 6px solid #ffeeba;
  border-radius: 8px;
}