/* Category photograph behind offer cards and the offer details dialog (assets/offer-backdrop.js). Decorative: a strong
   ivory wash keeps offer text, logos and controls fully readable, and the photo stays in the background layer. */
.has-backdrop{position:relative;isolation:isolate}
.has-backdrop::before{content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;background:linear-gradient(#fffdf8d6,#fffdf8d6),var(--cat-photo,none) center/cover no-repeat}
#offer-dialog[data-photo]{background:linear-gradient(#fffdf8eb,#fffdf8eb),var(--cat-photo,none) center/cover no-repeat,#fffdf8}
/* One small, separately optimised 400x267 WebP per category: under the heavy ivory wash a larger image adds nothing. */
[data-photo="home"]{--cat-photo:url(/assets/campaign/categories/category-home-backdrop.webp)}
[data-photo="family"]{--cat-photo:url(/assets/campaign/categories/category-family-backdrop.webp)}
[data-photo="pets"]{--cat-photo:url(/assets/campaign/categories/category-pets-backdrop.webp)}
[data-photo="you-time"]{--cat-photo:url(/assets/campaign/categories/category-you-time-backdrop.webp)}
[data-photo="travel"]{--cat-photo:url(/assets/campaign/categories/category-travel-backdrop.webp)}
[data-photo="fashion"]{--cat-photo:url(/assets/campaign/categories/category-fashion-backdrop.webp)}
[data-photo="groceries"]{--cat-photo:url(/assets/campaign/categories/category-groceries-backdrop.webp)}
[data-photo="technology"]{--cat-photo:url(/assets/campaign/categories/category-technology-backdrop.webp)}
[data-photo="sports"]{--cat-photo:url(/assets/campaign/categories/category-sports-backdrop.webp)}
[data-photo="crafts"]{--cat-photo:url(/assets/campaign/categories/category-crafts-backdrop.webp)}
[data-photo="gifts"]{--cat-photo:url(/assets/campaign/categories/category-gifts-backdrop.webp)}
[data-photo="garden"]{--cat-photo:url(/assets/campaign/categories/category-garden-backdrop.webp)}
[data-photo="motoring"]{--cat-photo:url(/assets/campaign/categories/category-motoring-backdrop.webp)}
[data-photo="food-drink"]{--cat-photo:url(/assets/campaign/categories/category-food-drink-backdrop.webp)}
[data-photo="wellness"]{--cat-photo:url(/assets/campaign/categories/category-wellness-backdrop.webp)}
[data-photo="shopping"]{--cat-photo:url(/assets/campaign/categories/category-shopping-backdrop.webp)}