/* Catalogo sfogliabile — stili locali offline */
.catalog-page{background:#ebe4d6;min-height:100vh}
.catalog-page .site-header.solid{background:var(--ivory)}
.catalog-main{max-width:1280px;margin:0 auto;padding:24px 4vw 48px;display:flex;flex-direction:column;gap:18px}
.catalog-intro{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:16px}
.catalog-intro h1{margin:0;font-size:clamp(1.6rem,3vw,2.35rem);line-height:1.15}
.catalog-intro p{margin:8px 0 0;max-width:38rem;color:#5a4338;font-size:.98rem;line-height:1.5}
.catalog-actions{display:flex;flex-wrap:wrap;gap:10px}
.catalog-actions .button,
.catalog-actions .button-ghost{margin-top:0}
.button-ghost{display:inline-block;background:transparent;color:var(--brown);border:1px solid #c9b79a;padding:15px 20px;text-transform:uppercase;letter-spacing:.12em;font-size:10px;font-weight:bold}
.button-ghost:hover{border-color:var(--rust);color:var(--rust)}
.button:focus-visible,
.button-ghost:focus-visible,
.catalog-ctrl:focus-visible,
.catalog-nav:focus-visible{outline:2px solid var(--rust);outline-offset:3px}

.catalog-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;background:rgba(246,240,228,.85);border:1px solid #d9ccb5}
.catalog-tools{display:flex;flex-wrap:wrap;gap:8px}
.catalog-ctrl{appearance:none;border:1px solid #c9b79a;background:#fff;color:var(--brown);min-height:42px;padding:8px 14px;font:inherit;font-size:11px;letter-spacing:.08em;text-transform:uppercase;font-weight:bold;cursor:pointer}
.catalog-ctrl:hover{border-color:var(--rust);color:var(--rust)}
.catalog-ctrl:disabled{opacity:.4;cursor:not-allowed}
.catalog-status{font-size:.92rem;color:#5a4338;min-height:1.4em}

.catalog-stage-wrap{position:relative;isolation:isolate}
.catalog-stage{
  position:relative;
  display:grid;
  place-items:center;
  min-height:min(72vh,820px);
  padding:18px 56px;
  background:linear-gradient(180deg,#e4dccb 0%,#d8cdba 100%);
  border:1px solid #d0c3ad;
  overflow:hidden;
  touch-action:pan-y;
}
.catalog-stage.is-expanded{
  position:fixed;inset:0;z-index:40;min-height:100vh;padding:24px 64px 72px;
  background:#1f140f;border:0;border-radius:0;
}
.catalog-stage.is-expanded .catalog-sheet{box-shadow:0 18px 50px rgba(0,0,0,.45)}
.catalog-stage.is-fullscreen{min-height:100vh;background:#1f140f;border:0}

.catalog-book{
  position:relative;
  width:min(100%,1040px);
  height:min(68vh,760px);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:0;
  transform-origin:center center;
  will-change:transform;
}
.catalog-book.is-panning{cursor:grabbing}
.catalog-book.is-zoomed{cursor:grab}

.catalog-sheet{
  position:relative;
  height:100%;
  max-width:100%;
  background:#fff;
  box-shadow:0 10px 28px rgba(46,24,17,.18);
  overflow:hidden;
  flex:0 1 auto;
}
.catalog-sheet img{
  display:block;
  width:auto;
  height:100%;
  max-width:100%;
  object-fit:contain;
  user-select:none;
  -webkit-user-drag:none;
  background:#f7f3ea;
}
.catalog-book[data-mode="cover"] .catalog-sheet,
.catalog-book[data-mode="back"] .catalog-sheet,
.catalog-book[data-mode="single"] .catalog-sheet{width:min(100%,420px)}
.catalog-book[data-mode="spread"]{width:min(100%,1040px)}
.catalog-book[data-mode="spread"] .catalog-sheet{width:50%;height:100%}
.catalog-book[data-mode="spread"] .catalog-sheet img{width:100%;height:100%;object-fit:contain}
.catalog-sheet.is-hidden{display:none}
.catalog-book.turn-next .catalog-sheet--right,
.catalog-book.turn-prev .catalog-sheet--left{
  animation:catalog-flip .42s ease;
}
@keyframes catalog-flip{
  0%{transform:perspective(1200px) rotateY(0);opacity:1}
  45%{opacity:.72}
  100%{transform:perspective(1200px) rotateY(0);opacity:1}
}
@media (prefers-reduced-motion:reduce){
  .catalog-book.turn-next .catalog-sheet--right,
  .catalog-book.turn-prev .catalog-sheet--left{animation:none}
  .catalog-book,.catalog-sheet{transition:none!important}
}

.catalog-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:46px;height:46px;border-radius:50%;
  border:1px solid #c9b79a;background:rgba(255,255,255,.92);
  color:var(--brown);font-size:22px;line-height:1;cursor:pointer;
  display:grid;place-items:center;z-index:2;
}
.catalog-nav:hover{border-color:var(--rust);color:var(--rust)}
.catalog-nav:disabled{opacity:.35;cursor:not-allowed}
.catalog-nav--prev{left:8px}
.catalog-nav--next{right:8px}
.catalog-stage.is-expanded .catalog-nav,
.catalog-stage.is-fullscreen .catalog-nav{background:rgba(255,255,255,.95)}

.catalog-hint{margin:0;text-align:center;font-size:.85rem;color:#6b564a}

@media (max-width:767px){
  .catalog-main{padding:16px 16px 36px}
  .catalog-stage{padding:12px 48px;min-height:62vh}
  .catalog-book{height:min(58vh,640px);width:100%}
  .catalog-book[data-mode="single"] .catalog-sheet,
  .catalog-book[data-mode="cover"] .catalog-sheet,
  .catalog-book[data-mode="back"] .catalog-sheet{width:min(100%,360px)}
  .catalog-nav{width:40px;height:40px;font-size:18px}
  .catalog-nav--prev{left:4px}
  .catalog-nav--next{right:4px}
  .catalog-toolbar{padding:10px}
  .catalog-ctrl{padding:8px 10px;font-size:10px}
  .catalog-stage.is-expanded{padding:16px 48px 64px}
}

@media (max-width:390px){
  .catalog-actions .button,
  .catalog-actions .button-ghost{width:100%;text-align:center}
}

/* evita scroll orizzontale della pagina */
html:has(.catalog-page),
.catalog-page{overflow-x:hidden}
.catalog-main,.catalog-stage,.catalog-toolbar{max-width:100%}