.wfb-float {
  position: fixed;
  bottom: 20px;
  z-index: 9999;
  padding: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
  transition: all 0.2s ease;
  text-decoration: none;
}
.wfb-float img { display:block; }
.wfb-right { right: 20px; }
.wfb-left { left: 20px; }
.wfb-float:hover { transform: translateY(-3px); }