.whats {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    left: 20px;
    background-color: #609163;
    color: #ffffff;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 1px 1px 2px #888;
    z-index: 1000;
  }