/* Lightbox pro stránky, které nenačítají cbu-clanek.css (titulní strana) – JS cbu-lightbox.js.
   Vzhled stejný jako v cbu-clanek.css. */
.clanek-zoom { cursor: zoom-in; }

.cbu-lightbox { position: fixed; inset: 0; z-index: 2000; display: none; background: rgba(0, 0, 0, .88); padding: 24px; }
.cbu-lightbox.is-open { display: flex; align-items: center; justify-content: center; cursor: zoom-out; }
.cbu-lightbox__img {
    display: block; margin: auto; max-width: 92vw; max-height: 90vh; width: auto; height: auto;
    border-radius: 6px; box-shadow: 0 10px 40px rgba(0, 0, 0, .5); cursor: zoom-out;
}
.cbu-lightbox__close {
    position: fixed; top: 16px; right: 20px; width: 46px; height: 46px; padding: 0; border: none;
    border-radius: 50%; background: rgba(255, 255, 255, .15); color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: background .15s; z-index: 1;
}
.cbu-lightbox__close svg { display: block; width: 18px; height: 18px; fill: #fff; }
.cbu-lightbox__close:hover { background: rgba(255, 255, 255, .3); }