.js-facebook-messenger-box {
width: 60px;
height: 60px;
display: block;
position: fixed;
cursor: pointer;
text-align: center;
line-height: 60px;
z-index: 999999 background: #1182FC;
border-radius: 100%;
overflow: hidden;
-webkit-box-shadow: 1px 1px 4px 0px rgba(0, 0, 0, 0.3);
-moz-box-shadow: 1px 1px 4px 0px rgba(0, 0, 0, 0.3);
box-shadow: 1px 1px 4px 0px rgba(0, 0, 0, 0.3);
}
thank you
