/**
 * EPF Gallery - default, framework-independent styles.
 *
 * Selectors are single classes: specific enough that generic template rules
 * (button, img, ul...) don't leak in, low enough to override from the template
 * with `.epf-gallery .epf-...`. For most tweaks, set the custom properties below
 * (e.g. `.epf-gallery { --epf-gap: 2rem; }`), or replace this file entirely with
 * templates/<template>/css/plg_content_epfgallery/epfgallery.css.
 */

.epf-gallery {
    --epf-gap: 0.75rem;
    --epf-radius: 0.375rem;
    --epf-ratio: 4 / 3;                 /* grid thumbnails; use "auto" for natural heights */
    --epf-carousel-ratio: 16 / 9;
    --epf-surface: rgb(127 127 127 / 0.08);
    --epf-border: rgb(127 127 127 / 0.25);
    --epf-focus: Highlight;
    --epf-backdrop: rgb(0 0 0 / 0.85);
    --epf-overlay-fg: #fff;
    --epf-overlay-bg: rgb(0 0 0 / 0.55);
    --epf-duration: 200ms;

    margin-block: 1.5rem;
}

.epf-gallery *,
.epf-gallery *::before,
.epf-gallery *::after {
    box-sizing: border-box;
}

.epf-gallery__empty {
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--epf-border);
    border-radius: var(--epf-radius);
    background: var(--epf-surface);
    text-align: center;
}

/* ------------------------------------------------------------------ Grid */

.epf-gallery__list {
    --epf-cols: 1;
    display: grid;
    grid-template-columns: repeat(var(--epf-cols), minmax(0, 1fr));
    gap: var(--epf-gap);
    margin: 0;
    padding: 0;
    list-style: none;
}

.epf-cols-1 { --epf-cols: 1; }
.epf-cols-2 { --epf-cols: 2; }

@media (min-width: 640px) {
    .epf-cols-s-1 { --epf-cols: 1; }
    .epf-cols-s-2 { --epf-cols: 2; }
    .epf-cols-s-3 { --epf-cols: 3; }
}

@media (min-width: 960px) {
    .epf-cols-m-1 { --epf-cols: 1; }
    .epf-cols-m-2 { --epf-cols: 2; }
    .epf-cols-m-3 { --epf-cols: 3; }
    .epf-cols-m-4 { --epf-cols: 4; }
}

.epf-gallery__item {
    margin: 0;
    padding: 0;
}

.epf-gallery__figure {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--epf-border);
    border-radius: var(--epf-radius);
    background: var(--epf-surface);
}

.epf-gallery__thumb {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    cursor: zoom-in;
}

.epf-gallery__thumb:focus-visible {
    outline: 3px solid var(--epf-focus);
    outline-offset: -3px;
}

.epf-gallery__thumb img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: var(--epf-ratio);
    object-fit: cover;
    transition: transform var(--epf-duration) ease;
}

.epf-gallery__thumb:hover img {
    transform: scale(1.03);
}

.epf-gallery__caption {
    padding: 0.5rem 0.75rem;
    overflow: hidden;
    font-size: 0.875em;
    white-space: nowrap;
    text-overflow: ellipsis;
}

/* ------------------------------------------------------- Popover lightbox */

.epf-lightbox {
    /* Reset the UA popover box; size to the image. */
    max-width: 100vw;
    max-height: 100dvh;
    margin: auto;
    padding: 0;
    overflow: visible;
    border: 0;
    background: transparent;
    color: var(--epf-overlay-fg, #fff);
}

/* ::backdrop only inherits custom properties in recent browsers, hence the fallback. */
.epf-lightbox::backdrop {
    background: var(--epf-backdrop, rgb(0 0 0 / 0.85));
}

.epf-lightbox__figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.epf-lightbox__image {
    display: block;
    max-width: min(92vw, 1600px);
    max-height: calc(100dvh - 7rem);
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--epf-radius, 0.375rem);
}

.epf-lightbox__caption {
    display: flex;
    gap: 1rem;
    justify-content: center;
    max-width: 92vw;
    font-size: 0.9375rem;
    text-align: center;
}

.epf-lightbox__counter {
    opacity: 0.75;
    font-variant-numeric: tabular-nums;
}

.epf-lightbox__btn,
.epf-carousel__btn {
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--epf-overlay-bg, rgb(0 0 0 / 0.55));
    color: var(--epf-overlay-fg, #fff);
    font: 400 1.75rem/1 system-ui, sans-serif;
    cursor: pointer;
}

.epf-lightbox__btn[hidden],
.epf-carousel__btn[hidden] {
    display: none;
}

.epf-lightbox__btn:hover,
.epf-carousel__btn:hover {
    background: rgb(0 0 0 / 0.8);
}

.epf-lightbox__btn:focus-visible,
.epf-carousel__btn:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 2px;
}

/* Fixed inside the top layer, i.e. pinned to the viewport edges. */
.epf-lightbox__close {
    position: fixed;
    top: 1rem;
    right: 1rem;
}

.epf-lightbox__prev,
.epf-lightbox__next {
    position: fixed;
    top: 50%;
    translate: 0 -50%;
}

.epf-lightbox__prev { left: 1rem; }
.epf-lightbox__next { right: 1rem; }

/* Fade in/out. Falls back to an instant toggle where unsupported. */
@media (prefers-reduced-motion: no-preference) {
    .epf-lightbox,
    .epf-lightbox::backdrop {
        opacity: 0;
        transition:
            opacity 200ms ease,
            overlay 200ms ease allow-discrete,
            display 200ms ease allow-discrete;
    }

    .epf-lightbox:popover-open,
    .epf-lightbox:popover-open::backdrop {
        opacity: 1;
    }

    @starting-style {
        .epf-lightbox:popover-open,
        .epf-lightbox:popover-open::backdrop {
            opacity: 0;
        }
    }
}

/* -------------------------------------------------------------- Carousel */

.epf-carousel__stage {
    position: relative;
}

.epf-carousel__track {
    display: flex;
    margin: 0;
    padding: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    list-style: none;
    border-radius: var(--epf-radius);
    background: var(--epf-surface);
}

.epf-carousel__track::-webkit-scrollbar {
    display: none;
}

.epf-carousel__track:focus-visible {
    outline: 3px solid var(--epf-focus);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: no-preference) {
    .epf-carousel__track {
        scroll-behavior: smooth;
    }
}

.epf-carousel__slide {
    position: relative;
    flex: 0 0 100%;
    margin: 0;
    scroll-snap-align: center;
    scroll-snap-stop: always;
}

.epf-carousel__slide img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: var(--epf-carousel-ratio);
    object-fit: contain;
}

.epf-carousel__caption {
    position: absolute;
    inset: auto 0 0;
    margin: 0;
    padding: 0.75rem 1rem;
    background: linear-gradient(transparent, rgb(0 0 0 / 0.7));
    color: #fff;
    text-align: center;
}

.epf-carousel__prev,
.epf-carousel__next {
    position: absolute;
    top: 50%;
    translate: 0 -50%;
}

.epf-carousel__prev { left: 0.75rem; }
.epf-carousel__next { right: 0.75rem; }

.epf-carousel__thumbs {
    display: flex;
    gap: 0.5rem;
    margin: var(--epf-gap) 0 0;
    padding: 0.25rem;
    overflow-x: auto;
    list-style: none;
}

.epf-carousel__thumbs li {
    flex: 0 0 auto;
    margin: 0;
}

.epf-carousel__thumb {
    display: block;
    border-radius: calc(var(--epf-radius) / 1.5);
    opacity: 0.55;
    transition: opacity var(--epf-duration) ease;
}

.epf-carousel__thumb:hover,
.epf-carousel__thumb[aria-current="true"] {
    opacity: 1;
}

.epf-carousel__thumb[aria-current="true"] {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

.epf-carousel__thumb:focus-visible {
    opacity: 1;
    outline: 3px solid var(--epf-focus);
    outline-offset: 2px;
}

.epf-carousel__thumb img {
    display: block;
    width: 4rem;
    height: 2.75rem;
    object-fit: cover;
    border-radius: inherit;
}