/* Cucina — libro (the recipe as a book) */
.view-libro {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--topbar));
  height: calc(100dvh - var(--topbar));
  min-height: 0;
}
.libro { flex: 1; min-height: 0; position: relative; overflow: hidden; }

.libro-nav {
  height: 56px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-top: var(--rule-ink);
  padding: 0 var(--margin);
  background: var(--paper);
}
.libro-btn {
  height: 44px;
  min-width: 44px;
  padding: 0 16px;
  font-size: 22px;
  font-weight: 300;
  border: var(--rule-ink);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), opacity var(--dur);
}
.libro-btn:hover { background: var(--ink); color: var(--paper); }
.libro-btn:disabled { opacity: 0.25; cursor: default; }
.libro-btn:disabled:hover { background: transparent; color: var(--ink); }
#libro-prev { justify-self: start; }
#libro-next { justify-self: end; }
.libro-pos { font-size: var(--t-sm); font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: 0.06em; color: var(--ink-2); }

/* ===== desktop spread ===== */
.spread {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  animation: spread-in var(--dur) var(--ease) both;
}
.spread[data-dir="back"] { animation-name: spread-in-back; }
@keyframes spread-in { from { opacity: 0; transform: translateX(32px); } to { opacity: 1; transform: none; } }
@keyframes spread-in-back { from { opacity: 0; transform: translateX(-32px); } to { opacity: 1; transform: none; } }

.pagina {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.pagina + .pagina { border-left: var(--rule); }
.pagina-vuota { background: var(--paper); }

/* cover: the plate is a true 4:5 frame on the page grid, the title stands beside it */
.cover-top { flex: 1; min-height: 0; display: flex; align-items: stretch; }
.cover-top .foto { flex: 0 0 auto; width: 62%; height: auto; aspect-ratio: 4 / 5; max-height: 100%; align-self: flex-start; container-type: size; }
.cover-titolo { flex: 1; min-width: 0; padding: calc(var(--u) * 3) var(--margin); display: flex; flex-direction: column; justify-content: flex-end; gap: 12px; border-left: var(--rule); }
.cover-titolo .display { font-size: clamp(28px, 2.6vw, 44px); }
.cover-titolo .desc { font-size: var(--t-sm); line-height: 1.45; color: var(--ink); }
.cover-testo { padding: calc(var(--u) * 2) var(--margin) calc(var(--u) * 3); border-top: var(--rule-ink); }
.meta {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0 12px;
  border-top: var(--rule);
  padding-top: 10px;
}
.meta div { min-width: 0; }
.meta .label { font-size: 11px; margin-bottom: 2px; }
.meta .val { font-size: var(--t-md); font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.meta .val small { font-weight: 500; color: var(--ink-2); font-size: var(--t-xs); }
.attrezzatura { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.attrezzatura span {
  font-size: var(--t-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: var(--rule);
  padding: 3px 8px;
  color: var(--ink-2);
}
.attrezzatura span.manca { border-color: var(--ink); color: var(--ink); font-weight: 700; }

/* text page */
.pagina-testo { padding: calc(var(--u) * 3) var(--margin); gap: calc(var(--u) * 3); }
.pagina-testo > * { flex: 0 0 auto; }

.blocco-ingredienti { }
.blocco-testa { display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: var(--rule-ink); padding-bottom: 8px; margin-bottom: 4px; }
.blocco-testa h2 { font-size: var(--t-xs); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.blocco-testa .porzioni { display: flex; align-items: center; gap: 10px; }
.blocco-testa .porzioni .label { font-size: 11px; }
.ingredienti { columns: 2; column-gap: var(--gutter); }
.ingredienti li {
  break-inside: avoid;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  padding: 6px 0;
  border-bottom: var(--rule);
  font-size: var(--t-sm);
  line-height: 1.35;
}
.ingredienti .q { font-variant-numeric: tabular-nums; font-weight: 700; text-align: right; white-space: nowrap; }
.ingredienti .q.qb { font-weight: 500; color: var(--ink-2); }
.ingredienti .n small { display: block; color: var(--ink-2); font-size: var(--t-xs); }
.ingredienti li.manca .n::after { content: 'manca'; margin-left: 6px; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; border: var(--rule-ink); padding: 0 4px; vertical-align: middle; }
.ingredienti li.opz .n { color: var(--ink-2); }
.ingredienti .pt { display: block; color: var(--ink-2); font-size: var(--t-xs); font-style: italic; }
.ingredienti li.sost .n s { color: var(--ink-2); text-decoration-thickness: 1px; }
.modifica { border: var(--rule-ink); padding: 10px 12px; margin: 8px 0 16px; }
.modifica .label { display: block; margin-bottom: 4px; }
.modifica ul { margin: 0; padding: 0; list-style: none; }
.modifica li { font-size: var(--t-sm); line-height: 1.4; }
.modifica li + li { margin-top: 4px; }
.copia-mancanti { margin-top: 10px; }

.passo { display: grid; grid-template-columns: 72px 1fr; column-gap: 16px; }
.passo .n {
  font-variation-settings: 'wdth' 62;
  font-weight: 900;
  font-size: 56px;
  line-height: 0.85;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}
.passo h3 { font-size: var(--t-md); font-weight: 700; margin-bottom: 4px; display: flex; gap: 10px; align-items: baseline; }
.passo h3 small { font-weight: 500; color: var(--ink-2); font-size: var(--t-xs); letter-spacing: 0.06em; }
.passo p { font-size: var(--t-md); line-height: 1.5; max-width: 62ch; }

.nota { border-top: var(--rule); padding-top: 10px; }
.nota h3 { font-size: var(--t-xs); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 4px; }
.nota p, .nota li { font-size: var(--t-sm); line-height: 1.45; max-width: 62ch; }
.nota li { padding-left: 14px; position: relative; }
.nota li::before { content: ''; position: absolute; left: 0; top: 0.6em; width: 6px; height: 1px; background: var(--ink); }

.misura { position: absolute; visibility: hidden; pointer-events: none; left: 0; top: 0; }

/* ===== mobile: horizontal pages ===== */
@media (max-width: 899px) {
  .libro {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }
  .libro::-webkit-scrollbar { display: none; }
  .pagina-m {
    flex: 0 0 100%;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    height: 100%;
    overflow-y: auto;
    padding: calc(var(--u) * 3) var(--margin) calc(var(--u) * 4);
    display: flex;
    flex-direction: column;
    gap: calc(var(--u) * 2);
  }
  .pagina-m.cover { padding-top: 0; }
  .pagina-m .cover-top { flex: 0 0 auto; display: block; margin: 0 calc(var(--margin) * -1); background: var(--mist); }
  .pagina-m .cover-top .foto { height: 52vh; width: calc(52vh * 0.8); max-width: 100%; margin: 0 auto; }
  .pagina-m .cover-titolo { padding: calc(var(--u) * 2) var(--margin) 0; border-left: 0; background: var(--paper); }
  .pagina-m .cover-titolo .display { font-size: 40px; }
  .pagina-m .cover-titolo .desc { font-size: var(--t-md); }
  .pagina-m .cover-testo { padding: 0 0 calc(var(--u) * 2); border-top: 0; }
  .pagina-m .meta { grid-template-columns: repeat(3, 1fr); gap: 10px 12px; }

  .pagina-m.step { justify-content: flex-start; }
  .pagina-m.step .n {
    font-variation-settings: 'wdth' 62;
    font-weight: 900;
    font-size: 128px;
    line-height: 0.8;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
    margin-top: 8px;
  }
  .pagina-m.step .n small { font-size: 20px; font-weight: 600; color: var(--ink-2); letter-spacing: 0; margin-left: 6px; }
  .pagina-m.step h3 { font-size: var(--t-lg); font-weight: 700; border-top: var(--rule-ink); padding-top: 12px; display: flex; justify-content: space-between; align-items: baseline; }
  .pagina-m.step h3 small { font-weight: 500; color: var(--ink-2); font-size: var(--t-sm); }
  .pagina-m.step p { font-size: 21px; line-height: 1.45; }

  .pagina-m .ingredienti { columns: 1; }
  .pagina-m .copia-mancanti { margin-bottom: 16px; }
  .pagina-m .ingredienti li { font-size: var(--t-md); padding: 10px 0; grid-template-columns: 84px 1fr; }
  .pagina-m .blocco-testa { flex-wrap: wrap; }
  .pagina-m .nota p, .pagina-m .nota li { font-size: var(--t-md); }

  .libro-nav { padding-bottom: max(0px, env(safe-area-inset-bottom)); height: calc(56px + env(safe-area-inset-bottom)); }
}