/**
 * mod_vr_gallery
 * Schlanke Unterseiten-Galerie mit optionalem Textbereich, flexibler Galerieposition,
 * festen Thumbnails und lokaler Lightbox.
 * Alle projektspezifischen Werte kommen als validierte CSS-Variablen aus dem Modul.
 */

.vr-gallery-section {
  background: var(--vrg-section-bg);
  color: var(--vrg-text-color);
  scroll-margin-top: var(--vrg-scroll-margin-top);
}

/* Volle Browserbreite, falls der Abschnitt innerhalb eines begrenzten Template-Containers liegt. */
.vr-gallery-section--full {
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.vr-gallery-section--box {
  max-width: var(--vrg-max-width);
}

.vr-gallery-section--align-center {
  margin-left: auto;
  margin-right: auto;
}

.vr-gallery-section--align-right {
  margin-left: auto;
}

/* Entfernt bei Bedarf den Template-/Joomla-Abstand oberhalb des Inhaltsbereichs nur im Umfeld dieses Moduls. */
.vrb-template main:has(.vr-gallery-section--flush-content-spacing),
.vrb-template .vrb-main:has(.vr-gallery-section--flush-content-spacing),
.vrb-template .vrb-content:has(.vr-gallery-section--flush-content-spacing),
.vrb-template .vrb-component:has(.vr-gallery-section--flush-content-spacing),
.vrb-template .com-content-article:has(.vr-gallery-section--flush-content-spacing),
.vrb-template .item-page:has(.vr-gallery-section--flush-content-spacing) {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

.vr-gallery-section__inner {
  width: min(100%, var(--vrg-max-width));
  margin: 0 auto;
  padding: var(--vrg-section-padding-desktop);
  display: grid;
  grid-template-columns: 1fr;
  row-gap: var(--vrg-column-gap);
  align-items: start;
}

.vr-gallery-section__text,
.vr-gallery-section__gallery {
  min-width: 0;
}

.vr-gallery-section__text {
  color: var(--vrg-text-color);
  text-align: var(--vrg-text-align);
}

.vr-gallery-section__heading {
  margin: 0;
  color: var(--vrg-text-color);
  font-size: var(--vrg-heading-size);
  line-height: 1.15;
  text-align: var(--vrg-heading-align);
}

.vr-gallery-section__intro {
  color: var(--vrg-text-color);
  font-size: var(--vrg-text-size);
  line-height: var(--vrg-text-line-height);
}

/* Der Abstand zwischen Ueberschrift und Text liegt jetzt innerhalb der Textspalte.
   Dadurch kann die Galerie die Texthoehe nicht mehr versehentlich auseinanderziehen. */
.vr-gallery-section--has-heading.vr-gallery-section--has-intro .vr-gallery-section__intro {
  margin-top: var(--vrg-heading-text-gap);
}

.vr-gallery-section__intro > :first-child {
  margin-top: 0;
}

.vr-gallery-section__intro > :last-child {
  margin-bottom: 0;
}

.vr-gallery-section__intro a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

/* Seitliche Layouts: Text und Galerie sind eigene Grid-Spalten.
   Die Ueberschrift/Text-Abstaende koennen dadurch nicht mehr von der Galeriehoehe beeinflusst werden. */
.vr-gallery-section--gallery-right .vr-gallery-section__inner {
  grid-template-columns: minmax(0, calc(var(--vrg-left-width) * 1%)) minmax(0, calc(var(--vrg-right-width) * 1%));
  column-gap: var(--vrg-column-gap);
  row-gap: 0;
}

.vr-gallery-section--gallery-left .vr-gallery-section__inner {
  grid-template-columns: minmax(0, calc(var(--vrg-right-width) * 1%)) minmax(0, calc(var(--vrg-left-width) * 1%));
  column-gap: var(--vrg-column-gap);
  row-gap: 0;
}

.vr-gallery-section--gallery-right .vr-gallery-section__text {
  grid-column: 1;
  grid-row: 1;
}

.vr-gallery-section--gallery-right .vr-gallery-section__gallery {
  grid-column: 2;
  grid-row: 1;
}

.vr-gallery-section--gallery-left .vr-gallery-section__gallery {
  grid-column: 1;
  grid-row: 1;
}

.vr-gallery-section--gallery-left .vr-gallery-section__text {
  grid-column: 2;
  grid-row: 1;
}

/* Optional: Galerie beginnt bei seitlicher Darstellung auf Hoehe des Textanfangs.
   Der Versatz orientiert sich an der Ueberschriften-Schriftgroesse plus eingestelltem Ueberschrift-Text-Abstand. */
.vr-gallery-section--gallery-starts-at-text.vr-gallery-section--has-heading.vr-gallery-section--has-intro.vr-gallery-section--gallery-right .vr-gallery-section__gallery,
.vr-gallery-section--gallery-starts-at-text.vr-gallery-section--has-heading.vr-gallery-section--has-intro.vr-gallery-section--gallery-left .vr-gallery-section__gallery {
  margin-top: calc(var(--vrg-heading-size) + var(--vrg-heading-text-gap) + 6px);
}

/* Gestapelte Layouts: Galerie bewusst oberhalb oder unterhalb des gesamten Textblocks. */
.vr-gallery-section--gallery-above .vr-gallery-section__gallery {
  grid-column: 1;
  grid-row: 1;
}

.vr-gallery-section--gallery-above .vr-gallery-section__text {
  grid-column: 1;
  grid-row: 2;
}

.vr-gallery-section--gallery-below .vr-gallery-section__text {
  grid-column: 1;
  grid-row: 1;
}

.vr-gallery-section--gallery-below .vr-gallery-section__gallery {
  grid-column: 1;
  grid-row: 2;
}

.vr-gallery-section--gallery-only .vr-gallery-section__gallery {
  grid-column: 1;
  grid-row: 1;
}

.vr-gallery-grid {
  display: grid;
  grid-template-columns: repeat(var(--vrg-columns), minmax(0, 1fr));
  gap: var(--vrg-gap);
}

.vr-gallery-item {
  appearance: none;
  border: 0;
  margin: 0;
  padding: 0;
  width: 100%;
  height: var(--vrg-thumb-height);
  display: block;
  position: relative;
  overflow: hidden;
  cursor: zoom-in;
  border-radius: var(--vrg-thumb-radius);
  background: rgba(0, 0, 0, 0.08);
  box-shadow: 0 3px 8px rgba(var(--vrg-shadow-color-rgb), var(--vrg-shadow-opacity));
}

.vr-gallery-item img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: filter var(--vrg-transition-ms) ease, transform var(--vrg-transition-ms) ease;
}

.vr-gallery-section--filter-bw .vr-gallery-item img {
  filter: grayscale(1) sepia(0.18) contrast(0.95) brightness(0.96);
}

.vr-gallery-section--filter-muted .vr-gallery-item img {
  filter: saturate(0.45) contrast(0.95) brightness(0.94);
}

.vr-gallery-section--filter-color .vr-gallery-item img {
  filter: none;
}

.vr-gallery-section--hover-color .vr-gallery-item:hover img,
.vr-gallery-section--hover-color .vr-gallery-item:focus-visible img {
  filter: none;
  transform: scale(1.025);
}

.vr-gallery-item__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: var(--vrg-thumb-overlay-padding);
  background: rgba(var(--vrg-overlay-color-rgb), 0);
  opacity: 0;
  transition: background-color var(--vrg-transition-ms) ease, opacity var(--vrg-transition-ms) ease;
  pointer-events: none;
}

.vr-gallery-item:hover .vr-gallery-item__overlay,
.vr-gallery-item:focus-visible .vr-gallery-item__overlay {
  background: rgba(var(--vrg-overlay-color-rgb), var(--vrg-overlay-opacity));
  opacity: 1;
}

/* Optionaler Hover-Text auf Thumbnails: bei langen Bildunterschriften wird bewusst abgeschnitten. */
.vr-gallery-item__caption {
  max-width: 100%;
  max-height: max(0px, calc(100% - var(--vrg-thumb-caption-reserved-space) - var(--vrg-thumb-magnifier-bottom-offset)));
  overflow: hidden;
  color: var(--vrg-magnifier-color);
  font-size: var(--vrg-thumb-caption-size);
  line-height: var(--vrg-thumb-caption-line-height);
  text-align: center;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.45);
  white-space: pre-line;
}

/* Sobald Hover-Unterschriften aktiv sind, wird unten Platz fuer die Lupe reserviert. */
.vr-gallery-section--thumb-caption .vr-gallery-item__overlay {
  justify-content: flex-end;
}

.vr-gallery-item__magnifier {
  width: auto;
  height: auto;
  display: inline-grid;
  place-items: center;
  color: var(--vrg-magnifier-color);
  border: 0;
  border-radius: 0;
  font-size: var(--vrg-thumb-magnifier-size);
  line-height: 1;
  transform: translateY(-2px);
  opacity: 0.92;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  flex: 0 0 auto;
}

.vr-gallery-section--thumb-caption .vr-gallery-item__magnifier {
  margin-bottom: var(--vrg-thumb-magnifier-bottom-offset);
}

.vr-gallery-lightbox[hidden] {
  display: none !important;
}

/* Wenn die Lightbox offen ist, bleibt die Seite im Hintergrund ruhig stehen. */
html.vr-gallery-lightbox-is-open,
html.vr-gallery-lightbox-is-open body {
  overflow: hidden;
}

.vr-gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 56px;
  background: rgba(var(--vrg-lightbox-bg-rgb), var(--vrg-lightbox-opacity));
  touch-action: none;
}

/*
 * Die grosse Ansicht nutzt fast den ganzen Viewport.
 * Bildproportionen bleiben unveraendert: keine Breiten-/Hoehenvorgabe, nur max-Werte.
 */
.vr-gallery-lightbox__figure {
  margin: 0;
  max-width: calc(100vw - 112px);
  max-height: calc(100dvh - 12px);
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  justify-items: center;
  align-items: center;
}

.vr-gallery-lightbox__image {
  max-width: 100%;
  max-height: calc(100dvh - 18px);
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.45);
  touch-action: none;
  transform: translate3d(var(--vrg-zoom-x, 0px), var(--vrg-zoom-y, 0px), 0) scale(var(--vrg-zoom-scale, 1));
  transition: transform 160ms ease;
  will-change: transform;
}

.vr-gallery-lightbox--has-caption .vr-gallery-lightbox__image {
  max-height: calc(100dvh - 70px);
}

.vr-gallery-lightbox__caption {
  margin-top: 10px;
  color: #fff;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.35;
  text-align: center;
  white-space: pre-line;
}

.vr-gallery-lightbox__close,
.vr-gallery-lightbox__nav {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  cursor: pointer;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background-color 180ms ease, transform 180ms ease;
}

.vr-gallery-lightbox__close:hover,
.vr-gallery-lightbox__nav:hover,
.vr-gallery-lightbox__close:focus-visible,
.vr-gallery-lightbox__nav:focus-visible {
  background: rgba(255, 255, 255, 0.26);
  transform: scale(1.04);
}

.vr-gallery-lightbox__close {
  position: fixed;
  top: max(0px, env(safe-area-inset-top));
  right: max(6px, env(safe-area-inset-right));
  width: 38px;
  height: 38px;
  font-size: 1.8rem;
  line-height: 1;
  z-index: 2;
}

.vr-gallery-lightbox__nav {
  position: fixed;
  top: 42%;
  width: 50px;
  height: 50px;
  font-size: 2.8rem;
  line-height: 1;
  z-index: 2;
}

.vr-gallery-lightbox__nav--prev {
  left: 8px;
  transform: translateY(-50%);
}

.vr-gallery-lightbox__nav--next {
  right: 8px;
  transform: translateY(-50%);
}

.vr-gallery-lightbox__nav--prev:hover,
.vr-gallery-lightbox__nav--prev:focus-visible,
.vr-gallery-lightbox__nav--next:hover,
.vr-gallery-lightbox__nav--next:focus-visible {
  transform: translateY(-50%) scale(1.04);
}


@media (max-width: 560px) {
  .vr-gallery-grid {
    grid-template-columns: 1fr;
  }

  .vr-gallery-lightbox {
    padding: 6px;
  }

  .vr-gallery-lightbox__figure {
    max-width: calc(100vw - 12px);
    max-height: calc(100dvh - 12px);
  }

  .vr-gallery-lightbox__image {
    max-height: calc(100dvh - 16px);
  }

  .vr-gallery-lightbox--has-caption .vr-gallery-lightbox__image {
    max-height: calc(100dvh - 70px);
  }

  .vr-gallery-lightbox__close {
    top: max(0px, env(safe-area-inset-top));
    right: max(4px, env(safe-area-inset-right));
    width: 36px;
    height: 36px;
    font-size: 1.7rem;
  }

  .vr-gallery-lightbox__nav {
    top: 44%;
    width: 40px;
    height: 40px;
    font-size: 2.2rem;
  }

  .vr-gallery-lightbox__nav--prev {
    left: 6px;
    transform: translateY(-50%);
  }

  .vr-gallery-lightbox__nav--next {
    right: 6px;
    transform: translateY(-50%);
  }

  .vr-gallery-lightbox__nav--prev:hover,
  .vr-gallery-lightbox__nav--prev:focus-visible,
  .vr-gallery-lightbox__nav--next:hover,
  .vr-gallery-lightbox__nav--next:focus-visible {
    transform: translateY(-50%) scale(1.04);
  }
}

@media (prefers-reduced-motion: reduce) {
  .vr-gallery-item img,
  .vr-gallery-item__overlay,
  .vr-gallery-lightbox__close,
  .vr-gallery-lightbox__nav {
    transition: none !important;
  }
}