#cart-loading {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #ffffff;
  border: 1px solid #ccc;
  padding: 0.5em 1em;
  border-radius: 5px;
  font-weight: bold;
  z-index: 9999;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  font-family: sans-serif;
}