.whatsapp-fixed {
  position: fixed;
  right: max(18px, env(safe-area-inset-right, 0px));
  bottom: max(18px, env(safe-area-inset-bottom, 0px));
  z-index: 100;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #06cf53;
  color: #fff;
  box-shadow: 0 4px 16px #0003;
}
.whatsapp-fixed:hover { background: #05b849; color: #fff; }
.whatsapp-fixed:focus-visible { outline: 3px solid #123352; outline-offset: 3px; }
.whatsapp-fixed svg { width: 32px; height: 32px; }