/* EF Workbook landing — vanilla CSS, self-contained, no framework, no external fonts/CDN.
   Paper-light theme by default (it's a workbook), dark via prefers-color-scheme.
   Mobile-first. Tap targets >= 44px. */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* Atkinson Hyperlegible (SIL OFL) — lo stesso font del workbook: leggibilità
   come feature di prodotto, coerenza sito/PDF. Self-hosted, nessun CDN. */
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("assets/fonts/AH-Regular.ttf") format("truetype");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("assets/fonts/AH-Bold.ttf") format("truetype");
  font-weight: 600 800; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("assets/fonts/AH-Italic.ttf") format("truetype");
  font-weight: 400; font-style: italic; font-display: swap;
}

:root {
  --bg: #f8f5ef;
  --bg-elevated: #fffdf9;
  --bg-card: #fffdf9;
  --border: rgba(35, 28, 18, 0.13);
  --text: #23201a;
  --text-dim: #6b6459;
  --accent: #a34e28;
  --accent-strong: #8a3f1e;
  --accent-text: #fdf6f1;
  --danger: #a3372c;
  --radius: 14px;
  --font: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --bg-elevated: #1f1b15;
    --bg-card: #221e17;
    --border: rgba(255, 250, 240, 0.11);
    --text: #ece7dd;
    --text-dim: #a59d8e;
    --accent: #d98a5f;
    --accent-strong: #e6a37e;
    --accent-text: #221208;
    --danger: #d4796c;
    color-scheme: dark;
  }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

img, svg { max-width: 100%; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 0.6em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Layout shells ---------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(20px, 5vw, 48px);
}

.wordmark {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.header-link {
  color: var(--text-dim);
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 8px;
}
.header-link:hover { color: var(--accent); }

main { padding: 0 clamp(20px, 5vw, 48px); }

.section {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  max-width: 24ch;
}

.section-sub { color: var(--text-dim); margin-top: -0.4em; max-width: 58ch; }

/* ---------- Hero ---------- */

.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 0 48px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(2.1rem, 7.5vw, 3.4rem);
  max-width: 15ch;
}

.hero-sub {
  color: var(--text-dim);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  max-width: 52ch;
}

.hero-note {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 12px;
  margin-bottom: 0;
}

/* ---------- Buttons / CTAs (tap target >= 44px) ---------- */

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  border-radius: 999px;
  padding: 12px 28px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease;
}

.cta:active { transform: scale(0.98); }

.cta-primary {
  background: var(--accent);
  color: var(--accent-text);
}
.cta-primary:hover { background: var(--accent-strong); }

/* ---------- Pains grid ---------- */

.pains-grid {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

@media (min-width: 640px) {
  .pains-grid { grid-template-columns: repeat(3, 1fr); }
}

.pain-item h3 {
  font-size: 1rem;
  color: var(--danger);
}
.pain-item h3::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--danger);
  margin-top: 6px;
}
.pain-item p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 0; }

/* ---------- Answers (5 innovations) ---------- */

.answers-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
  counter-reset: answers;
}

.answer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(18px, 4vw, 26px);
}

.answer-card h3 {
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.answer-num {
  flex: none;
  width: 28px; height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 0.85rem;
  font-weight: 700;
}

.answer-card p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 0; }

/* ---------- Transparency pact ---------- */

.fact-row {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

@media (min-width: 640px) {
  .fact-row { grid-template-columns: repeat(3, 1fr); }
}

.fact {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.fact-value {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--accent);
}

.fact-label { color: var(--text-dim); font-size: 0.85rem; margin: 0; }

.toc-box {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: clamp(18px, 4vw, 26px);
  margin-top: 20px;
}

.toc-box h3 { font-size: 1rem; }

.toc-placeholder {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-dim);
  overflow-wrap: anywhere;
  padding: 8px 0;
}

.toc-note { color: var(--text-dim); font-size: 0.85rem; margin: 8px 0 0; }

.preview-grid {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

@media (min-width: 640px) {
  .preview-grid { grid-template-columns: repeat(3, 1fr); }
}

.preview-slot { margin: 0; }

.preview-img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.preview-slot figcaption {
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: 6px;
  text-align: center;
}

.preview-frame {
  aspect-ratio: 3 / 4;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  padding: 12px;
}

.preview-frame span {
  font-size: 0.78rem;
  font-weight: 400;
}

/* ---------- Pricing ---------- */

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 30px);
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 480px;
}

.price-tag { font-size: 2rem; font-weight: 700; margin: 0; }
.price-tag span { font-size: 0.95rem; font-weight: 400; color: var(--text-dim); }

.price-card ul { display: flex; flex-direction: column; gap: 8px; }
.price-card li {
  color: var(--text-dim);
  font-size: 0.92rem;
  padding-left: 18px;
  position: relative;
}
.price-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.price-note { color: var(--text-dim); font-size: 0.85rem; margin: 0; }

/* ---------- Waitlist ---------- */

.waitlist-form {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.waitlist-input {
  flex: 1 1 220px;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  font: inherit;
}

.waitlist-input:focus { outline: none; border-color: var(--accent); }
.waitlist-input::placeholder { color: var(--text-dim); }

.waitlist-note { color: var(--text-dim); font-size: 0.85rem; margin-top: 10px; }
.waitlist-msg { margin-top: 12px; font-weight: 600; }
.waitlist-msg.is-error { color: var(--danger); }

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px; height: 1px;
  overflow: hidden;
}

/* ---------- Privacy page (details list) ---------- */

.faq-list details {
  border-top: 1px solid var(--border);
  padding: 4px 0;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  padding: 12px 0; /* >= 44px total tap height */
}
.faq-list p { color: var(--text-dim); margin: 4px 0 14px; }

/* ---------- Footer ---------- */

.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px clamp(20px, 5vw, 48px) 56px;
  border-top: 1px solid var(--border);
}

.disclaimer, .footer-meta {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.footer-link {
  color: var(--text-dim);
  text-decoration: underline;
  display: inline-block;
  padding: 12px 4px;
  margin: -12px -4px -8px;
}
.footer-link:hover { color: var(--accent); }