.whatsapp-float {
  position: fixed;
  right: clamp(16px, 4vw, 32px);
  bottom: clamp(16px, 4vw, 32px);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-bg-base);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.whatsapp-float.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.whatsapp-float:hover {
  box-shadow: var(--shadow-accent);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-float {
    transition: opacity 0.3s linear;
    transform: none;
  }
}