.link-amazon {
    display: block;
    width: 100px;
    height: 50px;
    line-height: 50px;
    background-color: #FF9900;
    color: #fff;
    text-align: center;
    border-radius: 15px;
    text-decoration: none;
    margin-bottom: 10px;
  }
  
  .link-rakuten {
    display: block;
    width: 100px;
    height: 50px;
    line-height: 50px;
    background-color: #BF0000;
    color: #fff;
    text-align: center;
    border-radius: 15px;
    text-decoration: none;
    margin-bottom: 10px;
  }
  
  .link-instagram {
    display: block;
    width: 100px;
    height: 50px;
    line-height: 50px;
    background-color: #D300C5;
    color: #fff;
    text-align: center;
    border-radius: 15px;
    text-decoration: none;
    margin-bottom: 10px;
  }

  #fixed-buttons {
    position: fixed;
    right: 10px;
    bottom: 10px;
    z-index: 10;
  }