.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    background-color: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(0,0,0,.3);
    z-index: 999;
    transition: transform .25s ease, box-shadow .25s ease;
  }
  
  .whatsapp-float img {
    width: 28px;
    height: 28px;
  }
  
  /* Hover */
  .whatsapp-float:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 26px rgba(0,0,0,.35);
  }
  
  /* Mobile */
  @media (max-width: 768px) {
    .whatsapp-float {
      width: 52px;
      height: 52px;
      bottom: 16px;
      right: 16px;
    }
  }