#cart-overlay {
  display: flex;
  position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 99998;
}
#cart-drawer {
  position: fixed; top: 0; right: 0; width: 450px; max-width: 90vw; height: 100%;
  background: #fff; box-shadow: -8px 0 24px rgba(0,0,0,.15); z-index: 99999;
  display: flex;
  flex-direction: column;
}
[hidden] { display: none !important; }