.whatsapp-float {
  position: fixed;
  right: max(20px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 995;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 56px;
  padding: 12px 20px;
  border: 2px solid #fff;
  border-radius: 30px;
  background: #137457;
  color: #fff;
  box-shadow: 0 5px 22px rgba(0, 0, 0, .2);
  font: 600 15px/1.2 "Open Sans", Arial, sans-serif;
  text-decoration: none;
  transition: background .2s ease;
}
.whatsapp-float:hover { background: #0d5c44; color: #fff; text-decoration: none; }
.whatsapp-float:focus-visible { outline: 3px solid #5a5af3; outline-offset: 4px; }
.whatsapp-float svg { width: 28px; height: 28px; flex-shrink: 0; }
.back-to-top { bottom: calc(90px + env(safe-area-inset-bottom)); }
@media (max-width: 575px) {
  .whatsapp-float { width: 56px; padding: 12px; }
  .whatsapp-float span { display: none; }
}