.add-to-playlist-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0 25px;
    font-size: 20px;
    color: var(--heart-color);
    transition: color 0.3s ease;
  }

  .add-to-playlist-btn i.far.fa-heart,
  .add-to-playlist-btn i.fas.fa-heart {
    color: var(--heart-color);
  }