body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#game-panel {
  width: 100%;
  max-width: 480px;
  height: 100vh;
  background: white;
  padding: 20px;
  box-sizing: border-box;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}

#content {
  flex: 1;
  width: 100%;
  overflow-y: auto;
  margin-bottom: 10px;
}

#buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  width: 100%;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}

#music-controls {
  margin-bottom: 10px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}