CSS code
.hiro-chat-widget-toggle {
background: transparent;
margin-right: 5px;
border: 0 !important;
box-shadow: 0 !important;
}
.hiro-chat-widget-toggle:hover {
padding: 2px !important;
background: transparent !important;
outline: 0 !important;
border: 0 !important;
box-shadow: 0 !important;
}
iframe {
margin-bottom: 0 !important;
}