.whatsapp-chat {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  z-index: 35;
  min-height: 3.75rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 1rem 0.55rem 0.6rem;
  color: #fff;
  background: #168a45;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 999px;
  box-shadow: 0 0.9rem 2rem rgba(14, 70, 38, 0.3);
  font: 500 0.85rem/1.25 "Segoe UI", Arial, sans-serif;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.whatsapp-chat svg {
  width: 2.55rem;
  height: 2.55rem;
  flex: 0 0 2.55rem;
  fill: currentColor;
}

.whatsapp-chat strong {
  display: block;
  font-size: 0.95rem;
}

.whatsapp-chat:hover {
  color: #fff;
  background: #11753a;
  transform: translateY(-3px);
  box-shadow: 0 1.15rem 2.4rem rgba(14, 70, 38, 0.38);
}

.whatsapp-chat:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}

@media (max-width: 600px) {
  .whatsapp-chat {
    width: 3.75rem;
    padding: 0;
    justify-content: center;
  }

  .whatsapp-chat span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-chat { transition: none; }
}