/*!
 * s2w-gallery — foglio di stile del plugin Vue 3 <s2w-gallery>.
 *
 * Indipendente da Tailwind, Bootstrap e da qualunque skin: tutto passa dalle
 * custom property elencate qui sotto, che il componente scrive inline a partire
 * dalle sue prop. Per ritoccare l'aspetto senza toccare il markup basta
 * ridefinire le variabili su .s2wg (griglia) e .s2wg-viewer (schermo intero).
 *
 * Convenzione dei nomi: blocco `s2wg`, elemento `__`, variante `--`.
 */

/* ============================ TOKEN ============================ */

.s2wg,
.s2wg-viewer {
  /* griglia di anteprima */
  --s2wg-cols: 3;                              /* colonne, sovrascritto dal breakpoint attivo */
  --s2wg-gap: 1rem;
  --s2wg-radius: .75rem;
  --s2wg-ratio: 4 / 3;
  --s2wg-fondo: transparent;                   /* sfondo del blocco griglia */
  --s2wg-fondo-cella: #efe7dd;                 /* placeholder sotto la foto */
  --s2wg-bordo: rgba(20, 14, 10, .12);
  --s2wg-testo: #1a1410;
  --s2wg-testo-soft: rgba(26, 20, 16, .66);
  --s2wg-accento: #e08a1e;
  --s2wg-ombra: 0 1px 2px rgba(20, 14, 10, .06);
  --s2wg-ombra-alta: 0 12px 30px rgba(20, 14, 10, .16);

  /* schermo intero */
  --s2wg-viewer-fondo: #0e0a07;                /* opaco: la pagina sotto non traspare */
  --s2wg-viewer-testo: #fff;
  --s2wg-viewer-testo-soft: rgba(255, 255, 255, .72);
  --s2wg-viewer-comandi: rgba(255, 255, 255, .12);
  --s2wg-viewer-comandi-hover: rgba(255, 255, 255, .24);
  --s2wg-viewer-radius: .5rem;
  --s2wg-z: 9000;

  --s2wg-durata: .28s;
  --s2wg-molla: cubic-bezier(.22, .61, .36, 1);
}

/* ============================ GRIGLIA ============================ */

.s2wg {
  background: var(--s2wg-fondo);
  color: var(--s2wg-testo);
}

.s2wg__griglia {
  display: grid;
  grid-template-columns: repeat(var(--s2wg-cols), minmax(0, 1fr));
  gap: var(--s2wg-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.s2wg__cella {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  aspect-ratio: var(--s2wg-ratio);
  overflow: hidden;
  border: 1px solid var(--s2wg-bordo);
  border-radius: var(--s2wg-radius);
  background: var(--s2wg-fondo-cella);
  box-shadow: var(--s2wg-ombra);
  cursor: zoom-in;
  -webkit-appearance: none;
  appearance: none;
  transition: box-shadow var(--s2wg-durata), transform var(--s2wg-durata);
}

.s2wg__cella:hover,
.s2wg__cella:focus-visible {
  box-shadow: var(--s2wg-ombra-alta);
  transform: translateY(-2px);
}

.s2wg__cella:focus-visible {
  outline: 2px solid var(--s2wg-accento);
  outline-offset: 2px;
}

.s2wg__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--s2wg-molla);
}

.s2wg__cella:hover .s2wg__img {
  transform: scale(1.05);
}

/* lente in sovrimpressione, compare al passaggio del mouse */
.s2wg__lente {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(to top, rgba(20, 14, 10, .55), rgba(20, 14, 10, 0) 55%);
  opacity: 0;
  transition: opacity var(--s2wg-durata);
}

.s2wg__cella:hover .s2wg__lente,
.s2wg__cella:focus-visible .s2wg__lente {
  opacity: 1;
}

.s2wg__lente svg {
  width: 28px;
  height: 28px;
}

/* didascalia sotto l'anteprima, se attiva */
.s2wg__voce-titolo {
  display: block;
  margin-top: .5rem;
  font-size: .86rem;
  font-weight: 600;
  line-height: 1.25;
}

.s2wg__voce-testo {
  display: block;
  margin-top: .15rem;
  font-size: .8rem;
  line-height: 1.35;
  color: var(--s2wg-testo-soft);
}

/* ============================ MOSTRA TUTTE ============================ */

.s2wg__azioni {
  display: flex;
  justify-content: center;
  margin-top: calc(var(--s2wg-gap) * 1.25);
}

.s2wg__mostra {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.4rem;
  font: inherit;
  font-size: .88rem;
  font-weight: 600;
  color: var(--s2wg-testo);
  background: transparent;
  border: 1px solid var(--s2wg-bordo);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color var(--s2wg-durata), color var(--s2wg-durata), background var(--s2wg-durata);
}

.s2wg__mostra:hover {
  color: var(--s2wg-accento);
  border-color: var(--s2wg-accento);
}

.s2wg__mostra:focus-visible {
  outline: 2px solid var(--s2wg-accento);
  outline-offset: 2px;
}

.s2wg__mostra svg {
  width: 14px;
  height: 14px;
  transition: transform var(--s2wg-durata);
}

.s2wg__mostra[aria-expanded='true'] svg {
  transform: rotate(180deg);
}

.s2wg__vuota {
  margin: 0;
  font-size: .9rem;
  color: var(--s2wg-testo-soft);
}

/* ============================ SCHERMO INTERO ============================ */

.s2wg-viewer {
  position: fixed;
  inset: 0;
  z-index: var(--s2wg-z);
  display: grid;
  grid-template-rows: auto 1fr auto;
  /* colonna esplicita: senza `minmax(0, 1fr)` la traccia implicita si dimensiona
     su max-content e la striscia di miniature allargherebbe tutto il visore */
  grid-template-columns: minmax(0, 1fr);
  background: var(--s2wg-viewer-fondo);
  color: var(--s2wg-viewer-testo);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.s2wg-viewer:focus {
  outline: none;
}

.s2wg-viewer__barra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1.1rem;
}

.s2wg-viewer__contatore {
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--s2wg-viewer-testo-soft);
  font-variant-numeric: tabular-nums;
}

.s2wg-viewer__comando {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: inherit;
  background: var(--s2wg-viewer-comandi);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--s2wg-durata), opacity var(--s2wg-durata);
}

.s2wg-viewer__comando:hover {
  background: var(--s2wg-viewer-comandi-hover);
}

.s2wg-viewer__comando:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.s2wg-viewer__comando[disabled] {
  opacity: .3;
  cursor: default;
}

.s2wg-viewer__comando svg {
  width: 20px;
  height: 20px;
}

/* palco: immagine + frecce laterali */
.s2wg-viewer__palco {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  padding: 0 1rem;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

/* riquadro a misura fissa: cosi' `max-height` dell'immagine ha un riferimento
   certo e la foto non sborda mai sotto la striscia delle miniature */
.s2wg-viewer__figura {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0 3.5rem;
}

.s2wg-viewer__img {
  max-width: 100%;
  max-height: 100%;
  /* senza questi la foto non scende sotto la propria larghezza intrinseca
     (min-width:auto dei flex item) e sborda sulle viewport strette */
  min-width: 0;
  min-height: 0;
  object-fit: contain;
  border-radius: var(--s2wg-viewer-radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .45);
  -webkit-user-drag: none;
  will-change: transform, opacity;
}

.s2wg-viewer__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

.s2wg-viewer__nav--prec { left: .5rem; }
.s2wg-viewer__nav--succ { right: .5rem; }

/* didascalia + strip */
.s2wg-viewer__piede {
  padding: .9rem 1.1rem 1.1rem;
  text-align: center;
}

.s2wg-viewer__titolo {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.3;
}

.s2wg-viewer__testo {
  max-width: 62ch;
  margin: .35rem auto 0;
  font-size: .88rem;
  line-height: 1.5;
  color: var(--s2wg-viewer-testo-soft);
}

.s2wg-viewer__strip {
  display: flex;
  gap: .5rem;
  /* centrate quando ci stanno, allineate a sinistra quando straripano */
  justify-content: safe center;
  margin: .9rem 0 0;
  padding: .25rem;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: none;
  scroll-behavior: smooth;
}

.s2wg-viewer__strip::-webkit-scrollbar { display: none; }

/* La barra di scorrimento e' nascosta: con molte foto la sfumatura sul bordo dice
   che la striscia continua. Le classi le mette il componente misurando lo scroll. */
.s2wg-viewer__strip--sx {
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 3rem);
  mask-image: linear-gradient(to right, transparent 0, #000 3rem);
}

.s2wg-viewer__strip--dx {
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 3rem), transparent 100%);
  mask-image: linear-gradient(to right, #000 calc(100% - 3rem), transparent 100%);
}

.s2wg-viewer__strip--sx.s2wg-viewer__strip--dx {
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 3rem, #000 calc(100% - 3rem), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 3rem, #000 calc(100% - 3rem), transparent 100%);
}

.s2wg-viewer__pollice {
  flex: 0 0 auto;
  width: 62px;
  height: 46px;
  padding: 0;
  overflow: hidden;
  background: none;
  border: 2px solid transparent;
  border-radius: .35rem;
  opacity: .55;
  cursor: pointer;
  transition: opacity var(--s2wg-durata), border-color var(--s2wg-durata);
}

.s2wg-viewer__pollice img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.s2wg-viewer__pollice:hover { opacity: .85; }

.s2wg-viewer__pollice[aria-current='true'] {
  opacity: 1;
  border-color: var(--s2wg-accento);
}

.s2wg-viewer__pollice:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 1px;
}

/* ============================ TRANSIZIONI ============================ */

.s2wg-fade-enter-active,
.s2wg-fade-leave-active {
  transition: opacity var(--s2wg-durata) ease;
}

.s2wg-fade-enter-from,
.s2wg-fade-leave-to {
  opacity: 0;
}

/* scorrimento orizzontale fra le immagini: la direzione arriva da una classe
   sul palco, cosi' la stessa transizione serve avanti e indietro */
.s2wg-scorri-enter-active,
.s2wg-scorri-leave-active {
  transition: opacity var(--s2wg-durata) ease, transform var(--s2wg-durata) var(--s2wg-molla);
}

/* l'immagine che esce viene tolta dal flusso e ricentrata a mano, cosi' le due
   foto si incrociano senza saltare in alto a sinistra */
.s2wg-scorri-leave-active {
  position: absolute;
  inset: 0;
  margin: auto;
}

.s2wg-scorri-enter-from { opacity: 0; transform: translateX(var(--s2wg-entra, 40px)); }
.s2wg-scorri-leave-to   { opacity: 0; transform: translateX(var(--s2wg-esce, -40px)); }

@media (prefers-reduced-motion: reduce) {
  .s2wg__cella,
  .s2wg__img,
  .s2wg__lente,
  .s2wg-viewer__comando,
  .s2wg-fade-enter-active,
  .s2wg-fade-leave-active,
  .s2wg-scorri-enter-active,
  .s2wg-scorri-leave-active {
    transition-duration: .01ms !important;
  }

  .s2wg__cella:hover { transform: none; }
  .s2wg__cella:hover .s2wg__img { transform: none; }
}

/* lo scroll della pagina resta bloccato finche' lo schermo intero e' aperto */
.s2wg-bloccato {
  overflow: hidden !important;
}

@media (max-width: 640px) {
  .s2wg-viewer__nav--prec { left: .15rem; }
  .s2wg-viewer__nav--succ { right: .15rem; }
  .s2wg-viewer__palco { padding: 0 .35rem; }
  .s2wg-viewer__figura { padding: 0 3rem; }
  .s2wg-viewer__testo { font-size: .84rem; }
}