.floating-btn {
    width: 50px;
    height: 50px;
    background: dodgerblue;
    text-decoration: none;
    border-radius: 50%;
    color: #ffffff;
    font-size: 40px;
    box-shadow: 0 1px 3px 0 rgba(0,0,0,.2), 0 1px 1px 0 rgba(0,0,0,.14), 0 2px 1px -1px rgba(0,0,0,.12);
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    right: 20px;
    bottom: 20px;
    transition: background-color 0.25s ease-out, box-shadow 0.25s ease-out;
    border: none;
    cursor: pointer;
    outline: none;
  }
  .floating-btn:hover {
    box-shadow: 0 4px 5px -2px rgba(0,0,0,.2), 0 7px 10px 1px rgba(0,0,0,.14), 0 2px 16px 1px rgba(0,0,0,.12);
  }
  
  
  .floating-btn.clicked {
    background-color: #4169cc;
  }
  
  .floating-btn i {
    transition: transform 0.25s cubic-bezier(.4, 0, .2, 1);
  }
  
  .floating-btn.clicked i {
    transform: rotate(315deg);
  }