.card {
    position: relative;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-direction: column;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: transparent;
    background-clip: border-box;
        border-radius: .25rem;
        color: #000;
}
#myBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: #ff9800;
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 4px;
  }
  
  #myBtn:hover {
    background-color: #555;
  }