/* ==========================================================================
   WhatsApp Floating Button
   Fixed-position floating action button for instant WhatsApp messaging.
   Visible on all pages in the bottom-right corner.
   ========================================================================== */

.whatsapp-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-whatsapp);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: #25d366;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.whatsapp-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.whatsapp-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* WhatsApp SVG icon */
.whatsapp-btn svg {
  width: 28px;
  height: 28px;
  fill: var(--color-white);
}

/* Tooltip */
.whatsapp-btn__tooltip {
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%);
  margin-right: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}

.whatsapp-btn:hover .whatsapp-btn__tooltip {
  opacity: 1;
}