.whatsapp-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  bottom: max(24px, env(safe-area-inset-bottom));
  z-index: 900;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  box-sizing: border-box;
  border-radius: 50%;
  background: #16853e;
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 0 4px 16px #123c2926;
  text-decoration: none;
}
.whatsapp-fab svg {
  display: block;
  width: 27px;
  height: 27px;
  fill: currentColor;
}
.whatsapp-fab:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 4px;
}
@media (hover: hover) and (pointer: fine) {
  .whatsapp-fab:hover {
    background: #106c31;
  }
}
@media (max-width: 760px) {
  .whatsapp-fab {
    right: 16px;
    bottom: max(16px, env(safe-area-inset-bottom));
    width: 50px;
    height: 50px;
  }
  body > footer {
    padding-bottom: 85px;
  }
}