body {
      margin: 0;
      padding: 0;
      background-color: darkgray;
    }

    img {
      width: 100%;
      height: auto;
      margin: 0 auto;
      display: block;
    }

  .boton-compartir {
    position: fixed;
    bottom: 0;
    width: 205px;
    height: 50px;
    background-color: red;
    color: white;
    font-size: 20px;
    text-align: center;
    line-height: 50px;
    cursor: pointer;
    margin-bottom: 20px;
    text-decoration: none;
    font-family: poppins;
    border-radius: 31px;
    border-style: groove;
}
.btn-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #ff0000;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
}

    @media (max-width: 768px) {
     img {
      width: 100%;
      height: auto;
      margin: 50px auto;
      display: block;
      top: 30px; 
    }
         
   .boton-compartir {
    width: 60%;
    height: 30px;
    font-size: 22px;
    padding-bottom: 10px;
    padding-top: 10px;
    line-height: 30px;
    text-transform: uppercase;
    margin-left: 5%;
    border-radius: 31px;
    border-style: groove;
}
        .btn-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #ff0000;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}
}