#logo {
    background-color: rgb(129, 192, 242);
    position: fixed;
    right: 20px;
    bottom: 20px;
    text-align: center;
    width: 90px;
    height: 90px;
    line-height: 90px;
    color: #fff;
    border-radius: 50%;
    display: none;
    cursor: pointer;
  }
#logo img{
  width: 90px;
  height: 90px;
  border-radius: 50%;
}
  /* #logo:hover {
    background-color: rgb(45, 150, 233);
  } */