.support-whatsapp-launcher {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(20px, calc(env(safe-area-inset-bottom) + 16px));
  z-index: 1000;
  display: grid;
  place-items: center;
  width: var(--support-size, 64px);
  height: var(--support-size, 64px);
  padding: 0;
  border: 2px solid #f7fff8;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 9px 26px #0008;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.support-whatsapp-launcher:hover { transform: scale(1.06); box-shadow: 0 12px 30px #0009; }
.support-whatsapp-launcher:focus-visible { outline: 3px solid #a2f9ce; outline-offset: 3px; }
.support-whatsapp-launcher svg { width: 55%; height: 55%; fill: currentColor; }
.support-whatsapp-error { margin-top: 10px; color: #ffaaaa; font-size: 13px; line-height: 1.4; }