/* ============================================================
   Dispensa 1 — Fondamenti di economia · Corso per estetiste
   Foglio di stile condiviso per index.html + 8 file di lezione.

   Sistema visivo: human-approachable (tokens vincolati verbatim),
   display serif Lora, accento teal derivato in oklch.

   Linguaggio grafico v2 (impatto visivo + memoria):
   - copertina magazine: titolo direttamente sulla foto, velo scuro
   - numero di tema gigante in outline (numero "bucato")
   - watermark di pagina nell'angolo (contatore CSS automatico)
   - chip etichetta che "esce" dal bordo superiore della card
   - numeri cerchiati pieni nei processi e nella timeline
   - fascia memoria in teal scuro con testo display
   ============================================================ */

:root {
  /* Direction tokens — human-approachable, bound verbatim */
  --bg:      oklch(98% 0.004 240);
  --surface: oklch(100% 0 0);
  --fg:      oklch(20% 0.02 240);
  --muted:   oklch(50% 0.018 240);
  --border:  oklch(90% 0.006 240);
  --accent:  oklch(56% 0.12 170);

  /* Derived states — same hue, contrast-safe */
  --accent-ink:    oklch(44% 0.12 170);
  --accent-bright: oklch(72% 0.12 170);
  --accent-soft:   color-mix(in oklch, var(--accent) 12%, transparent);
  --accent-softer: color-mix(in oklch, var(--accent) 7%, transparent);
  --accent-faint:  color-mix(in oklch, var(--accent) 16%, transparent);

  /* Foto: veli e ombre coerenti */
  --photo-veil: oklch(26% 0.03 220);

  /* Skill rule: display = serif via --font-display */
  --font-display: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  counter-reset: folio;
}
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; }
a { color: var(--accent-ink); }
a:hover { color: color-mix(in oklch, var(--accent-ink) 80%, var(--fg)); }

/* Parole chiave in evidenza (sempre su superfici chiare) */
.key-card strong, .explain strong, .esempio strong,
.punti strong, .vs-card li strong, .flow-step strong,
.focus-steps p strong, .sintesi strong, .quiz p strong {
  color: var(--accent-ink);
  font-weight: 590;
}

/* ─── toolbar fissa (mai stampata) ─────────────────────────── */
.toolbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 20px;
  background: color-mix(in oklch, var(--surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.toolbar-home,
.toolbar-print {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.toolbar-home:hover,
.toolbar-print:hover {
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
  border-color: color-mix(in oklch, var(--accent) 45%, var(--border));
  color: var(--fg);
}
.toolbar-home:focus-visible,
.toolbar-print:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.toolbar-print:active, .toolbar-home:active { transform: translateY(1px); }
.toolbar-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}
.toolbar-page {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  white-space: nowrap;
}
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--accent);
  width: 0;
  z-index: 21;
  transition: width 0.18s ease;
}

/* ─── pagina ───────────────────────────────────────────────── */
.page {
  counter-increment: folio;
  position: relative;
  width: min(880px, calc(100% - 32px));
  min-height: min(1180px, calc(100svh - 88px));
  margin: 76px auto 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 28px color-mix(in oklch, var(--fg) 7%, transparent);
  padding: clamp(36px, 5.4vw, 60px) clamp(32px, 5.4vw, 68px) 52px;
  display: flex;
  flex-direction: column;
  scroll-margin-top: 76px;
}
/* filo d'accento in testa a ogni pagina (la copertina è esclusa) */
.page:not(.page-cover)::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 18px 18px 0 0;
}
.page-head {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
  margin-bottom: 30px;
}
/* watermark: numero di pagina gigante, solo decorativo */
.page-head::after {
  content: counter(folio, decimal-leading-zero);
  position: absolute;
  top: -14px;
  right: -4px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 84px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent-faint);
  pointer-events: none;
  z-index: 0;
}
.page-head > * { position: relative; z-index: 1; }
.page-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0;
}
.page-lesson-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
  white-space: nowrap;
}
.page-foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-foot span { display: inline-block; }

/* ─── copertina magazine: titolo sulla foto ────────────────── */
.page-cover {
  padding: 0;
  overflow: hidden;
  justify-content: flex-start;
}
.cover-photo {
  position: relative;
  height: clamp(300px, 46vh, 480px);
  background: color-mix(in oklch, var(--accent) 18%, var(--bg));
}
.cover-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cover-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    color-mix(in oklch, var(--photo-veil) 86%, transparent) 0%,
    color-mix(in oklch, var(--photo-veil) 34%, transparent) 46%,
    transparent 74%
  );
  pointer-events: none;
}
.cover-overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: clamp(28px, 4.4vw, 48px) clamp(32px, 5.4vw, 68px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1;
}
.cover-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin: 0;
}
.cover-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(38px, 5.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 20ch;
  color: oklch(100% 0 0);
}
.cover-body {
  padding: clamp(28px, 4.4vw, 46px) clamp(32px, 5.4vw, 68px) 48px;
  display: flex;
  flex-direction: column;
}
.cover-lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 54ch;
  margin: 0 0 24px;
}
.cover-topics {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  max-width: 640px;
}
.cover-topics li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--accent-ink);
  background: var(--accent-softer);
  border: 1px solid color-mix(in oklch, var(--accent) 24%, var(--border));
  border-radius: 999px;
  padding: 7px 14px;
}
.cover-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 6px;
}

/* ─── titoli di pagina ─────────────────────────────────────── */
.h-page {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
  max-width: 26ch;
}
.lead {
  font-size: 16px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 26px;
}

/* ─── testata tema: numero gigante in outline + idea in corsivo ── */
.tema-top {
  display: flex;
  align-items: flex-end;
  gap: clamp(16px, 2.6vw, 28px);
  margin-bottom: 24px;
}
.tema-num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(64px, 9vw, 104px);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 2px var(--accent-ink);
  flex: 0 0 auto;
  user-select: none;
}
@supports not (-webkit-text-stroke: 1px black) {
  .tema-num { color: var(--accent-faint); }
}
.tema-top .h-page { margin-bottom: 8px; }
/* l'idea in una riga: il gancio di memoria della pagina */
.tema-top .lead {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 19px;
  line-height: 1.45;
  color: var(--accent-ink);
  max-width: 40ch;
  margin-bottom: 0;
}

/* ─── carte dei punti chiave ───────────────────────────────── */
.key-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 22px;
}
.key-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 14px;
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.key-card-num {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent-softer);
  border-radius: 999px;
  padding: 3px 10px;
}
.key-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  max-width: 32ch;
}
.key-card p strong { font-weight: 590; }
@media (hover: hover) {
  .key-card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in oklch, var(--accent) 45%, var(--border));
    box-shadow: 0 8px 20px color-mix(in oklch, var(--fg) 9%, transparent);
  }
}

/* ─── spiegazione breve ────────────────────────────────────── */
.explain {
  max-width: 65ch;
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.65;
}
.explain p { margin: 0 0 10px; }
.explain p:last-child { margin-bottom: 0; }

/* ─── box esempio: chip che esce dal bordo superiore ───────── */
.esempio {
  position: relative;
  background: var(--accent-softer);
  border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--border));
  border-radius: 14px;
  padding: 22px 20px 18px;
  margin: 14px 0 22px;
  max-width: 68ch;
}
.esempio-label {
  position: absolute;
  top: -13px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: oklch(100% 0 0);
  background: var(--accent-ink);
  border-radius: 999px;
  padding: 5px 13px;
  margin: 0;
}
.esempio p { margin: 0; font-size: 15px; line-height: 1.6; }

/* ─── fascia memoria ───────────────────────────────────────── */
.memory-band {
  margin-top: auto;
  margin-bottom: 4px;
  background: var(--accent-ink);
  color: oklch(100% 0 0);
  border-radius: 16px;
  padding: 20px 24px;
  max-width: 72ch;
}
.memory-band .memory-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-bright);
  display: block;
  margin-bottom: 6px;
}
.memory-band p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.45;
}
.memory-band strong { font-weight: 600; color: var(--accent-bright); }

/* ─── confronto a due colonne ──────────────────────────────── */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0 0 22px;
}
.vs-card {
  border-radius: 14px;
  padding: 18px 20px;
}
.vs-card h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 12px;
  padding-bottom: 10px;
}
.vs-a {
  background: var(--accent-softer);
  border: 1px solid color-mix(in oklch, var(--accent) 30%, var(--border));
}
.vs-a h3 {
  color: var(--accent-ink);
  border-bottom: 1px solid color-mix(in oklch, var(--accent) 30%, var(--border));
}
.vs-b {
  background: var(--surface);
  border: 1px solid var(--border);
}
.vs-b h3 { color: var(--muted); border-bottom: 1px solid var(--border); }
.vs-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.vs-card li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.55;
}
.vs-card li:last-child { margin-bottom: 0; }
.vs-card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.vs-b li::before { background: color-mix(in oklch, var(--accent) 55%, var(--border)); }

/* ─── processo a binario ───────────────────────────────────── */
.flow-row {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 0 0 22px;
  counter-reset: flow;
}
.flow-step {
  counter-increment: flow;
  flex: 1;
  position: relative;
  padding: 16px 30px 16px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-right: 30px;
}
.flow-step:last-child { margin-right: 0; padding-right: 16px; }
.flow-step::after {
  content: "→";
  position: absolute;
  right: -24px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent);
  pointer-events: none;
}
.flow-step:last-child::after { content: none; }
.flow-step::before {
  content: counter(flow, decimal-leading-zero);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-ink);
  color: oklch(100% 0 0);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}
.flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.5;
}
.flow-step p strong { font-weight: 590; }

/* ─── mappa / obiettivi ────────────────────────────────────── */
.obiettivi { list-style: none; margin: 0 0 26px; padding: 0; }
.obiettivi li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 9px;
  max-width: 62ch;
}
.obiettivi li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--accent);
}
.mappa {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: mappa;
}
.mappa li {
  counter-increment: mappa;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.mappa li:last-child { border-bottom: none; }
.mappa .mappa-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent-ink);
  flex: 0 0 auto;
}
.mappa a {
  text-decoration: none;
  color: var(--fg);
  font-size: 16px;
  border-radius: 4px;
}
.mappa a:hover { color: var(--accent-ink); }
.mappa a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.mappa .mappa-page {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
}

/* ─── punti semplici (dove le carte non bastano) ───────────── */
.block-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 10px;
}
.punti {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}
.punti li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 9px;
  max-width: 62ch;
}
.punti li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.punti strong { font-weight: 590; }

/* ─── foto interna con didascalia e credito ────────────────── */
.photo-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface);
  margin: 0 0 22px;
}
.photo-card img {
  display: block;
  width: 100%;
  height: clamp(200px, 28vw, 300px);
  object-fit: cover;
}
.photo-card figcaption {
  padding: 10px 16px 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}
.credit {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ─── focus (caso concreto): timeline a cerchi pieni ───────── */
.focus-steps { counter-reset: step; margin: 0; padding: 0; list-style: none; }
.focus-steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 18px 40px;
  border-left: 2px solid var(--border);
  margin-left: 12px;
}
.focus-steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.focus-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: -13px;
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-ink);
  color: oklch(100% 0 0);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  justify-content: center;
}
.focus-steps h3 { font-size: 16px; font-weight: 590; margin: 0 0 4px; }
.focus-steps p { margin: 0; color: var(--muted); font-size: 15px; max-width: 58ch; }

/* ─── sintesi: righe-carta con numero display ──────────────── */
.sintesi { list-style: none; margin: 0; padding: 0; counter-reset: sint; }
.sintesi li {
  counter-increment: sint;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 18px;
  margin-bottom: 12px;
  max-width: 76ch;
}
.sintesi li:last-child { margin-bottom: 0; }
.sintesi li::before {
  content: counter(sint, decimal-leading-zero);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--accent-ink);
  flex: 0 0 auto;
}
.sintesi .sintesi-tema {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-ink);
  flex: 0 0 150px;
  padding-top: 4px;
}
.sintesi span:last-child { font-size: 15.5px; line-height: 1.55; }

/* ─── verifica ─────────────────────────────────────────────── */
.quiz { margin: 0 0 20px; padding: 0; list-style: none; counter-reset: quiz; }
.quiz > li {
  counter-increment: quiz;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 14px;
  padding: 16px 20px 18px;
  margin-bottom: 14px;
}
.quiz h3 {
  font-size: 16px;
  font-weight: 590;
  margin: 0 0 10px;
}
.quiz h3::before {
  content: "Domanda " counter(quiz) " — ";
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.quiz details { margin-top: 10px; }
.quiz summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-radius: 6px;
}
.quiz summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.quiz details[open] summary { color: var(--fg); }
.quiz details p { margin: 6px 0 0; font-size: 15px; color: var(--muted); max-width: 60ch; }

/* ─── glossario ────────────────────────────────────────────── */
.glossario { margin: 0; }
.glossario .gl-item {
  display: flex;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.glossario .gl-item:last-child { border-bottom: none; }
.glossario dt {
  flex: 0 0 220px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-ink);
  padding-top: 2px;
}
.glossario dd {
  margin: 0;
  color: var(--muted);
  max-width: 52ch;
  font-size: 15px;
}

/* ─── indice generale ──────────────────────────────────────── */
.lesson-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  text-decoration: none;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 14px;
  background: var(--surface);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.lesson-thumb {
  width: 140px;
  height: 112px;
  border-radius: 12px;
  object-fit: cover;
  display: block;
  transition: transform 0.2s ease;
}
.lesson-card:hover {
  border-color: color-mix(in oklch, var(--accent) 50%, var(--border));
  box-shadow: 0 8px 22px color-mix(in oklch, var(--fg) 8%, transparent);
  transform: translateY(-2px);
  color: var(--fg);
}
.lesson-card:hover .lesson-thumb { transform: scale(1.05); }
.lesson-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.lesson-card-body { display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.lesson-card-top {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
}
.lesson-card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.lesson-card h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
}
.lesson-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  max-width: 62ch;
}
.lesson-card-meta {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ─── crediti fotografici (indice) ─────────────────────────── */
.credits {
  margin-top: 8px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}
.credits summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  padding: 14px 18px;
  min-height: 44px;
  display: flex;
  align-items: center;
  border-radius: 14px;
}
.credits summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.credits ul {
  list-style: none;
  margin: 0;
  padding: 4px 18px 16px;
}
.credits li {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
  padding: 5px 0;
  border-top: 1px solid var(--border);
}
.credits a { color: var(--accent-ink); }

/* ─── navigazione tra pagine ───────────────────────────────── */
.page-turn {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto 72px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.page-turn a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 11px 20px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.page-turn a:hover {
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
  border-color: color-mix(in oklch, var(--accent) 45%, var(--border));
  color: var(--fg);
}
.page-turn a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.page-turn .pt-next { margin-left: auto; }
.page-turn .pt-spacer { flex: 1; }

/* ─── responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .key-cards { grid-template-columns: 1fr 1fr; }
  .flow-row { flex-direction: column; }
  .flow-step { margin-right: 0; margin-bottom: 24px; padding-right: 16px; }
  .flow-step::after {
    content: "↓";
    right: auto;
    left: 50%;
    top: auto;
    bottom: -21px;
    transform: translateX(-50%);
  }
  .flow-step:last-child::after { content: none; }
  .flow-step:last-child { margin-bottom: 0; }
  .vs-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .toolbar { gap: 8px; padding: 8px 12px; }
  .toolbar-title { display: none; }
  .page { min-height: auto; margin-top: 72px; padding: 28px 20px 34px; }
  .page-cover { padding: 0; }
  .cover-photo { height: 240px; }
  .cover-overlay { padding: 20px; }
  .cover-title { font-size: 32px; }
  .cover-body { padding: 24px 20px 32px; }
  .tema-top { flex-direction: column; align-items: flex-start; gap: 8px; }
  .tema-num { font-size: 68px; }
  .key-cards { grid-template-columns: 1fr; }
  .lesson-card { grid-template-columns: 92px 1fr; gap: 14px; }
  .lesson-thumb { width: 92px; height: 92px; }
  .page-foot { flex-direction: column; gap: 4px; }
  .page-head::after { font-size: 60px; top: -6px; }
  .glossario dt { flex-basis: 130px; }
  .glossario .gl-item { flex-direction: column; gap: 2px; }
  .sintesi .sintesi-tema { flex-basis: 100px; }
  .sintesi li { flex-wrap: wrap; }
  .page-turn a { padding: 10px 16px; font-size: 11px; }
}

/* ─── stampa ───────────────────────────────────────────────── */
@page { size: A4; margin: 14mm; }
@media print {
  html { scroll-behavior: auto; }
  body { background: var(--surface); font-size: 12.5pt; }
  .toolbar, .progress-bar, .page-turn { display: none !important; }
  .page {
    width: auto;
    min-height: 0;
    margin: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    break-after: page;
  }
  .page:last-child { break-after: auto; }
  .page:not(.page-cover)::before { display: none; }
  .page-head::after { display: none; }
  .page-cover { padding: 0; }
  .cover-photo { height: 88mm; }
  .cover-photo::after { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .cover-overlay { padding: 26px 0 20px; }
  .cover-title { color: oklch(100% 0 0); }
  .cover-body { padding: 28px 0 0; }
  .photo-card, .key-card, .memory-band, .esempio, .vs-card, .flow-step {
    break-inside: avoid;
  }
  .memory-band, .esempio-label, .flow-step::before, .focus-steps li::before,
  .key-card, .quiz > li {
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  a { color: var(--fg); text-decoration: none; }
  .cover-topics li { border-color: var(--border); }
  .lesson-thumb { width: 100mm; height: 70mm; }
}

/* ─── accessibilità moto ridotto ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .progress-bar, .lesson-card, .lesson-thumb, .toolbar-home, .toolbar-print,
  .page-turn a, .key-card {
    transition: none;
  }
  .lesson-card:hover, .key-card:hover { transform: none; }
  .lesson-card:hover .lesson-thumb { transform: none; }
  .toolbar-home:active, .toolbar-print:active { transform: none; }
}