.wa-fab {
  position: fixed;
  right: clamp(1rem, 3vw, 1.8rem);
  bottom: clamp(1rem, 3vw, 1.8rem);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 10px 28px rgba(18, 140, 66, 0.4);
  transition: transform 0.3s var(--ease-birth), box-shadow 0.3s ease;
}

.wa-fab:hover {
  color: #fff;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 16px 36px rgba(18, 140, 66, 0.5);
}

.wa-fab__tip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  background: var(--lea-green-deep);
  color: var(--lea-ivory);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  padding: 0.5em 0.9em;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.wa-fab:hover .wa-fab__tip,
.wa-fab:focus-visible .wa-fab__tip {
  opacity: 1;
}

@media (max-width: 600px) {
  .wa-fab__tip {
    display: none;
  }
}