.product-purchase { display: grid; gap: .9rem; padding-block-start: .25rem; }
.product-purchase .store-button { inline-size: 100%; min-block-size: 3.4rem; border: 0; font-size: 1rem; white-space: nowrap; cursor: pointer; }
.product-purchase .store-button:hover { filter: brightness(.94); }
.product-purchase .store-button:disabled { cursor: not-allowed; opacity: .5; }