.alineram-whatsapp-btn {
  position: fixed;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 28px;
  z-index: 9999;
  text-decoration: none;
}

.shape-circle { border-radius: 50%; }
.shape-square { border-radius: 0; }
.shape-rounded { border-radius: 12px; }

.pos-bottom-right { bottom: 0; right: 0; }
.pos-bottom-left  { bottom: 0; left: 0; }
.pos-top-right    { top: 0; right: 0; }
.pos-top-left     { top: 0; left: 0; }

.alineram-whatsapp-btn:hover {
  opacity: 0.9;
}

.alineram-whatsapp-btn {
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.alineram-whatsapp-btn.active {
  opacity: 1;
}