/* Simple pure-CSS tooltip using data attribute */
.single_add_to_cart_button.wvtt-has-tooltip {
  position: relative;
  cursor: not-allowed;
}

.single_add_to_cart_button.wvtt-has-tooltip::after {
  content: attr(data-wvtt);
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translateX(-50%) translateY(-8px);
  white-space: nowrap;
  background: rgba(0,0,0,0.85);
  color: #fff;
  font-size: 13px;
  line-height: 1;
  padding: 8px 10px;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  z-index: 9999;
}

.single_add_to_cart_button.wvtt-has-tooltip:hover::after,
.single_add_to_cart_button.wvtt-has-tooltip:focus::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-12px);
}

/* optional small arrow */
.single_add_to_cart_button.wvtt-has-tooltip::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translateX(-50%) translateY(-2px);
  border: 6px solid transparent;
  border-top-color: rgba(0,0,0,0.85);
  opacity: 0;
  transition: opacity .15s ease;
  z-index: 9998;
}

.single_add_to_cart_button.wvtt-has-tooltip:hover::before,
.single_add_to_cart_button.wvtt-has-tooltip:focus::before {
  opacity: 1;
}