/* ── WhatsApp Floating Button ─────────────────────────────────────────────── */

.whatsapp-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-full);
  background: #25D366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45), var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

@media (hover: hover) {
  .whatsapp-btn:hover {
    transform: scale(1.12);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.55), var(--shadow-lg);
  }
}

.whatsapp-btn:focus-visible {
  outline: 3px solid #25D366;
  outline-offset: 3px;
}

.whatsapp-btn__icon {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

/* ── Tooltip ─────────────────────────────────────────────────────────────── */

.whatsapp-btn__tooltip {
  position: absolute;
  right: calc(100% + 0.875rem);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-text);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  white-space: nowrap;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

/* Arrow pointing right toward the button */
.whatsapp-btn__tooltip::after {
  content: '';
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--color-text);
}

/* Show on hover — pointer devices only */
@media (hover: hover) {
  .whatsapp-btn:hover .whatsapp-btn__tooltip {
    opacity: 1;
  }
}

/* Auto-show via JS: add .whatsapp-btn--tooltip-visible to the link */
.whatsapp-btn--tooltip-visible .whatsapp-btn__tooltip {
  opacity: 1;
}

/* ── Mobile (<769px) ─────────────────────────────────────────────────────── */

@media (max-width: 48rem) {
  .whatsapp-btn {
    bottom: 6.5rem;
    right: 1rem;
    width: 5rem;
    height: 5rem;
  }

  .whatsapp-btn__icon {
    width: 3rem;
    height: 3rem;
  }

  /* Tooltip goes above the button on mobile (no right-side space) */
  .whatsapp-btn__tooltip {
    right: auto;
    left: 50%;
    top: auto;
    bottom: calc(100% + 0.75rem);
    transform: translateX(-75%);
    white-space: normal;
    max-width: 12rem;
    text-align: center;
  }

  /* Arrow pointing down toward the button */
  .whatsapp-btn__tooltip::after {
    left: 75%;
    top: 100%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--color-text);
    border-left-color: transparent;
  }
}

/* ── Reduced motion ──────────────────────────────────────────────────────── */

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