.cb-atc-qty-form{
  display:flex; gap:.5rem; align-items:center; flex-wrap:wrap;
}
.cb-atc-qty-form .quantity input[type=number],
.cb-atc-qty-form .qty{
  width:80px; padding:.5rem; border:1px solid #ddd; border-radius:6px;
}
.cb-atc-qty-btn{
  padding:.6rem 1rem; border-radius:8px; border:0; background:#111; color:#fff; cursor:pointer;
  transition:transform .06s ease, opacity .2s ease;
}
.cb-atc-qty-btn.is-loading{ opacity:.7; }
.cb-atc-qty-btn.is-success{ background:#2e7d32; }
.cb-atc-qty-btn.is-error{ background:#c62828; }