.fccb-chat-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: block;
    width: 60px;
    height: 60px;
    background: #4285F4;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    text-align: center;
    padding: 10px;
}
.fccb-chat-button img {
    max-width: 100%;
    height: auto;
}