body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    padding: 20px;
  }
  
  h1 {
    text-align: center;
  }
  
  .genre-section {
    margin-bottom: 40px;
    padding: 10px;
    border-radius: 8px;
  }
  
  .genre-title {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 10px;
    user-select: none;
  }
  
  .song-item {
    margin-bottom: 15px;
    padding: 8px;
    border-radius: 5px;
    background-color: rgba(255,255,255,0.8);
  }
  
  .song-title {
    font-weight: bold;
    font-size: 1.2em;
  }
  
  .song-title-jp {
    font-weight: bold;
    font-size: 1.2em;
    color: #555;
  }
  
  .song-subtitle {
    font-size: 0.9em;
    color: #666;
    margin-left: 5px;
  }
  
  .song-subtitle-jp {
    font-size: 0.9em;
    color: #888;
    margin-left: 5px;
  }
  
  button {
    margin-right: 5px;
    margin-top: 5px;
    padding: 4px 8px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
  }

  .close-button {
    all: unset;
    float: right;
    font-weight: bolder;
    font-size: xx-large;
    padding: 10px;
    padding-top: 0px;
    margin: 0px;
    cursor: pointer;
  }
  
  button:hover {
    opacity: 0.8;
  }

  #backToTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 15px;
    font-size: 1rem;
    cursor: pointer;
    display: none;
    z-index: 1000;
}

.song-item[data-display="none"] {
  display: none;
}