@media screen and (max-width:715px) {
  .contendor_whatsapp {
    position: fixed;
    bottom: 20px;
    right: 10px;
    z-index: 999;
  }

  .contendor_whatsapp img {
    width: 60px;
    filter: drop-shadow(-1px 4px 4px rgba(0, 0, 0, 0.237));
  } 
}

@media only screen and (min-width:716px) and (max-width:5000px) {
  .contendor_whatsapp {
    width: 100px;
    height: 100px;
    box-sizing: content-box;
    position: fixed;
    right: 20px;
    bottom: 10px;
    z-index: 999;
    cursor: pointer;
  }

  .contendor_whatsapp img {
    width: 70px;
    filter: drop-shadow(-1px 4px 4px rgba(0, 0, 0, 0.237));
  } 
}