.rs-toast{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 9999;
  background: #111827;
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  padding: 10px 12px;
  border-radius: 9999px;
  box-shadow: 0 10px 20px rgba(0,0,0,.2);
  transform: translateY(12px);
  opacity: 0;
  transition: all .25s ease;
}
.rs-toast.in{ transform: translateY(0); opacity: 1; }

a.ajax_add_to_cart.rs-busy{ opacity:.6; pointer-events:none; }
a.ajax_add_to_cart.rs-pulse{ transform: scale(0.98); transition: transform .2s ease; }