.cajaf{
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    z-index: 100000;
  }
  .cajaf:hover{
    height: 180px;
  }
  .cajaf:hover .caja1{
    visibility: visible;
    bottom: 60px;
  }
  .cajaf:hover .caja2{
    visibility: visible;
    bottom: 120px;
  }
  .caja2:hover:before{
    visibility: visible;
    color:#25d366;
  }
  .caja1:hover:before{
    visibility: visible; 
    color:#ffffff;
  }
  .btn_roundf{
    position: absolute;
    bottom:0 ;
    right: 0;
    border:1px solid #ffffff;
    background: #25d366;
    color:#ffffff;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    z-index: 90090; 
    display: flex;
    align-content: center;
    justify-content: center;
    text-align: center;
    align-items: center;
    
  }
  .caja1::before{
    content: "Estados Unidos";
    background: #25d366;
    border:1px solid #25d366;
    position: absolute;
    left: -140px; 
    padding: .5em;
    visibility: hidden;
  }
  .caja2::before{
    content: "Colombia";
    background: #ffffff;
    border:1px solid #25d366;
    position: absolute;
    left: -110px; 
    padding: .5em;
    visibility: hidden;
  }
  .caja1{
    position: absolute;
    bottom: 0;
    right: 0;
    border:1px solid #25d366;
    background: #ffffff;
    color: #25d366;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    z-index: 90080; 
    display: flex;
    align-content: center;
    justify-content: center;
    text-align: center;
    align-items: center;
    -webkit-transition: all .5s;
    visibility: hidden;
  }
  .caja2{
    position: absolute;
    bottom: 0;
    right: 0;
    border:1px solid #fff;
    background: #25d366;
    color:#fff;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    z-index: 9070; 
    display: flex;
    align-content: center;
    justify-content: center;
    text-align: center;
    align-items: center;
    visibility: hidden;
    -webkit-transition: all 1s;
  }