/* Libre Franklin, variabile, ospitato qui: caricarlo da Google manderebbe
   l'IP di ogni visitatore a un terzo, in contraddizione con l'informativa. */
@font-face {
  font-family: "Libre Franklin";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/font/libre-franklin-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
                 U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193,
                 U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* Verde inchiostro: non il blu di categoria, non il monocromo editoriale.
     Neutri virati verso la stessa tinta, mai grigi puri. */
  --ink:        oklch(0.26 0.045 168);
  --ink-deep:   oklch(0.20 0.040 170);
  --ink-soft:   oklch(0.42 0.055 166);
  --paper:      oklch(0.985 0.004 95);
  --paper-warm: oklch(0.958 0.010 92);
  --text:       oklch(0.24 0.020 170);
  --text-soft:  oklch(0.47 0.018 172);
  --line:       oklch(0.90 0.008 150);
  --accent:     oklch(0.55 0.135 45);   /* rame, solo per i richiami */
  --on-ink:     oklch(0.96 0.012 140);
  --on-ink-soft:oklch(0.80 0.020 150);
  --line-ink:   oklch(0.36 0.040 168);

  --wrap: 68rem;
  --text-wrap: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      oklch(0.19 0.018 172);
    --paper-warm: oklch(0.23 0.020 172);
    --text:       oklch(0.92 0.012 150);
    --text-soft:  oklch(0.72 0.015 155);
    --line:       oklch(0.32 0.022 170);
    --ink:        oklch(0.22 0.042 170);
    --ink-deep:   oklch(0.17 0.036 172);
    --accent:     oklch(0.72 0.120 48);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: "Libre Franklin", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 clamp(1.15rem, 4vw, 2.5rem); }
.narrow { max-width: var(--text-wrap); }

/* ---------- intestazione ---------- */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  min-height: 4.25rem;
  flex-wrap: wrap;
}
.brand {
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand em { font-style: normal; font-weight: 400; color: var(--text-soft); }
nav.site { display: flex; gap: 1.5rem; flex-wrap: wrap; }
nav.site a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms cubic-bezier(0.22, 1, 0.36, 1),
              border-color 180ms cubic-bezier(0.22, 1, 0.36, 1);
}
nav.site a:hover { color: var(--text); border-bottom-color: var(--text); }
nav.site a.here { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- apertura ---------- */
.hero {
  background: var(--ink);
  color: var(--on-ink);
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem);
}
.hero .grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: end;
}
@media (max-width: 52rem) { .hero .grid { grid-template-columns: 1fr; gap: 2.25rem; } }

.hero h1 {
  font-size: clamp(2.1rem, 6.2vw, 4rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.035em;
  margin: 0 0 1.1rem;
  text-wrap: balance;
}
.hero h1 .sub { display: block; font-weight: 400; color: var(--on-ink-soft); letter-spacing: -0.02em; }
.hero p {
  margin: 0;
  color: var(--on-ink-soft);
  font-size: clamp(1.02rem, 1.6vw, 1.15rem);
  max-width: 34rem;
  line-height: 1.7;
}
.hero .side { padding-bottom: 0.35rem; }

.actions { display: flex; gap: 0.85rem; flex-wrap: wrap; margin-top: 2rem; }

.btn {
  display: inline-block;
  background: var(--on-ink);
  color: var(--ink-deep);
  text-decoration: none;
  padding: 0.78rem 1.6rem;
  border-radius: 3px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
              background-color 220ms cubic-bezier(0.22, 1, 0.36, 1);
}
.btn:hover { transform: translateY(-1px); background: #fff; }
.btn.ghost {
  background: transparent;
  color: var(--on-ink);
  border-color: var(--line-ink);
}
.btn.ghost:hover { background: transparent; border-color: var(--on-ink-soft); }

/* avviso dentro l'apertura: niente riquadro, solo un filetto sopra */
.hero .caveat {
  border-top: 1px solid var(--line-ink);
  padding-top: 1.15rem;
  font-size: 0.95rem;
  color: var(--on-ink-soft);
  line-height: 1.6;
}
.hero .caveat strong { color: var(--on-ink); font-weight: 600; }

/* ---------- sezioni ---------- */
main { padding-bottom: clamp(3rem, 7vw, 5rem); }
section { padding: clamp(2.75rem, 6vw, 4.75rem) 0; }
section + section { border-top: 1px solid var(--line); }

.kicker {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.85rem;
}

h1 { font-size: clamp(1.85rem, 4.5vw, 2.6rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.12; margin: 0 0 0.9rem; }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.75rem); font-weight: 700; letter-spacing: -0.022em; line-height: 1.2; margin: 0 0 0.9rem; }
h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.012em; margin: 1.75rem 0 0.4rem; }

p { margin: 0 0 1.05rem; max-width: var(--text-wrap); }
.lead { font-size: 1.12rem; color: var(--text-soft); line-height: 1.7; max-width: 40rem; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }

ul, ol { padding-left: 1.15rem; margin: 0 0 1.05rem; max-width: var(--text-wrap); }
li { margin-bottom: 0.45rem; }

/* due colonne asimmetriche */
.split {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
@media (max-width: 52rem) { .split { grid-template-columns: 1fr; gap: 1.25rem; } }
.split > :first-child > :last-child { margin-bottom: 0; }

/* elenco numerato senza schede */
.steps { list-style: none; padding: 0; margin: 0; max-width: none; counter-reset: p; }
.steps li {
  counter-increment: p;
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0 1rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
  margin: 0;
  max-width: none;
}
.steps li::before {
  content: counter(p, decimal-leading-zero);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--accent);
  padding-top: 0.28rem;
}
.steps li h3 { margin: 0 0 0.2rem; }
.steps li p { margin: 0; color: var(--text-soft); }

/* banda quieta */
.strip { background: var(--paper-warm); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* dati identificativi */
dl.ident { margin: 0; }
dl.ident dt {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-soft);
  margin-top: 1.5rem;
  font-weight: 600;
}
dl.ident dt:first-child { margin-top: 0; }
dl.ident dd { margin: 0.2rem 0 0; }

/* ---------- tabelle ---------- */
.tablewrap { overflow-x: auto; margin: 1.35rem 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.96rem; min-width: 22rem; }
th, td { text-align: left; padding: 0.62rem 0.85rem 0.62rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--text-soft); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
code, .mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}
code { background: var(--paper-warm); border: 1px solid var(--line); border-radius: 3px; padding: 0.08rem 0.32rem; }

/* ---------- nota ---------- */
.note {
  border: 1px solid var(--line);
  background: var(--paper-warm);
  border-radius: 4px;
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
  font-size: 0.97rem;
  max-width: 42rem;
}
.note p:last-child { margin-bottom: 0; }

/* ---------- FAQ ---------- */
details.faq { border-bottom: 1px solid var(--line); }
details.faq > summary {
  cursor: pointer;
  padding: 1.05rem 2rem 1.05rem 0;
  font-weight: 600;
  list-style: none;
  position: relative;
  transition: color 180ms cubic-bezier(0.22, 1, 0.36, 1);
}
details.faq > summary::-webkit-details-marker { display: none; }
details.faq > summary::after {
  content: "";
  position: absolute;
  right: 0.35rem;
  top: 1.5rem;
  width: 0.62rem;
  height: 0.62rem;
  border-right: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: rotate(45deg);
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
}
details.faq[open] > summary::after { transform: rotate(-135deg); top: 1.72rem; }
details.faq > summary:hover { color: var(--accent); }
details.faq .body { padding: 0 0 1.1rem; }
details.faq .body > *:last-child { margin-bottom: 0; }

/* ---------- piede ---------- */
footer.site {
  background: var(--ink-deep);
  color: var(--on-ink-soft);
  padding: clamp(2.25rem, 5vw, 3.25rem) 0;
  font-size: 0.93rem;
}
footer.site a { color: var(--on-ink-soft); text-decoration-color: var(--line-ink); }
footer.site a:hover { color: var(--on-ink); }
footer.site .row { display: flex; justify-content: space-between; gap: 1.5rem 2.5rem; flex-wrap: wrap; }
footer.site nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
footer.site strong { color: var(--on-ink); font-weight: 600; }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}