/*
 * Il manuale: tre colonne che sanno restringersi.
 *
 * A sinistra i capitoli, al centro il testo, a destra il sommario della pagina.
 * Sotto i 1100 px il sommario sparisce (lo stesso elenco è nella pagina), sotto
 * gli 860 l'indice diventa un pannello che si apre dal bottone ☰.
 *
 * La misura della riga è volutamente stretta: un manuale si legge, non si
 * scorre, e oltre i 70 caratteri l'occhio perde la riga successiva.
 */
:root {
  --bg: #0f1115;
  --panel: #14171d;
  --panel2: #1a1d23;
  --border: #2b2f36;
  --text: #ffffff;
  --muted: #a7adb3;
  --accent: #ccff00;
  --on-accent: #0f1115;
  --ok: #30d158;
  --warn: #ff9f0a;
  --danger: #ff453a;
  --lato: 268px;
  --somm: 232px;
  --testa: 74px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--testa) + 16px); }
body {
  background: var(--bg); color: var(--text);
  font-family: Inter, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px; line-height: 1.68; -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3, h4 { font-family: Rajdhani, Inter, sans-serif; line-height: 1.12; text-wrap: balance; }

.salta { position: absolute; left: -9999px; }
.salta:focus { left: 12px; top: 12px; z-index: 60; background: var(--accent); color: var(--on-accent); padding: 10px 16px; }

/* ---------- testata ---------- */
.testa {
  position: sticky; top: 0; z-index: 30; height: var(--testa);
  background: rgba(15,17,21,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.testa .in { display: flex; align-items: center; gap: 14px; height: 100%; padding: 0 20px; }
.testa .logo img { height: 34px; width: auto; display: block; }
.testa .sez {
  font: 600 .74rem/1 Rajdhani, sans-serif; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); border-left: 1px solid var(--border); padding-left: 14px;
}
.testa .sez:hover { color: var(--text); text-decoration: none; }
.testa .azioni { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.testa .azioni a { color: var(--muted); font-size: .88rem; }
.testa .azioni a:hover { color: var(--text); text-decoration: none; }
.testa .btn {
  background: var(--accent); color: var(--on-accent); padding: 9px 16px;
  font: 700 .8rem/1 Rajdhani, sans-serif; letter-spacing: .08em; text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.testa .btn:hover { color: var(--on-accent); filter: brightness(1.08); }
.testa .menu { display: none; background: transparent; border: 1px solid var(--border); color: var(--text); font-size: 1rem; padding: 6px 11px; cursor: pointer; }

/* ---------- impianto ---------- */
.corpo {
  display: grid; grid-template-columns: var(--lato) minmax(0, 1fr) var(--somm);
  max-width: 1500px; margin: 0 auto; align-items: start;
}

/* ---------- indice laterale ---------- */
.lato {
  position: sticky; top: var(--testa); max-height: calc(100vh - var(--testa));
  overflow-y: auto; padding: 22px 14px 40px 20px; border-right: 1px solid var(--border);
}
.cerca { margin-bottom: 14px; }
.cerca input {
  width: 100%; background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  padding: 9px 12px; font: 400 .9rem/1.3 Inter, sans-serif;
}
.cerca input::placeholder { color: var(--muted); }
.risultati { list-style: none; margin-bottom: 16px; border: 1px solid var(--border); background: var(--panel); }
.risultati li { border-bottom: 1px solid var(--border); }
.risultati li:last-child { border-bottom: 0; }
.risultati a { display: block; padding: 9px 12px; color: var(--text); font-size: .86rem; }
.risultati a:hover { background: var(--panel2); text-decoration: none; }
.risultati a span { display: block; color: var(--muted); font-size: .76rem; margin-top: 2px; }
.risultati .vuoto { padding: 10px 12px; color: var(--muted); font-size: .85rem; }
.capitoli { list-style: none; counter-reset: none; }
.capitoli a {
  display: flex; gap: 10px; padding: 7px 10px; color: var(--muted); font-size: .9rem;
  border-left: 2px solid transparent;
}
.capitoli a b { color: #5c636c; font: 600 .78rem/1.7 Rajdhani, sans-serif; letter-spacing: .06em; flex: none; }
.capitoli a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.capitoli .on a { color: var(--accent); border-left-color: var(--accent); background: rgba(204,255,0,.06); }
.capitoli .on a b { color: var(--accent); }

/* ---------- sommario di pagina ---------- */
.sommario {
  position: sticky; top: var(--testa); max-height: calc(100vh - var(--testa));
  overflow-y: auto; padding: 26px 20px 40px 14px;
}
.sommario > b {
  display: block; font: 600 .7rem/1 Rajdhani, sans-serif; letter-spacing: .18em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 12px;
}
.sommario ol { list-style: none; border-left: 1px solid var(--border); }
.sommario li a { display: block; padding: 5px 0 5px 12px; color: var(--muted); font-size: .82rem; line-height: 1.4; margin-left: -1px; border-left: 2px solid transparent; }
.sommario li a:hover { color: var(--text); text-decoration: none; }
.sommario li.l3 a { padding-left: 24px; font-size: .79rem; }
.sommario li a.attivo { color: var(--accent); border-left-color: var(--accent); }

/* ---------- contenuto ---------- */
main { padding: 34px 46px 60px; min-width: 0; }
article { max-width: 74ch; }
.briciole { font-size: .8rem; color: var(--muted); margin-bottom: 10px; }
.briciole span { opacity: .5; margin: 0 4px; }
article h1 { font-size: clamp(2rem, 3.6vw, 2.7rem); font-weight: 700; text-transform: uppercase; }
.occhiello { color: var(--muted); font-size: 1.08rem; margin: 14px 0 30px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
article h2 {
  font-size: 1.62rem; font-weight: 700; margin: 46px 0 14px; padding-top: 8px;
  border-top: 2px solid var(--accent); display: inline-block; padding-right: 18px;
}
article h3 { font-size: 1.22rem; font-weight: 600; margin: 30px 0 10px; }
article h4 { font-size: 1.03rem; font-weight: 600; margin: 22px 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-family: Rajdhani, sans-serif; }
article p { margin: 0 0 16px; }
article ul, article ol { margin: 0 0 18px 22px; }
article li { margin-bottom: 8px; }
article li::marker { color: var(--accent); }
article strong { color: #fff; font-weight: 600; }
article code {
  background: var(--panel2); border: 1px solid var(--border); padding: 1px 6px;
  font: 400 .87em/1.4 ui-monospace, 'SF Mono', Menlo, Consolas, monospace; color: var(--accent);
}
article pre {
  background: var(--panel2); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 14px 16px; overflow-x: auto; margin: 0 0 20px; position: relative;
}
article pre code { background: none; border: 0; padding: 0; color: var(--text); font-size: .86rem; line-height: 1.6; }
article pre[data-lang]::after {
  content: attr(data-lang); position: absolute; right: 10px; top: 6px;
  font: 600 .64rem/1 Rajdhani, sans-serif; letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
article img { max-width: 100%; height: auto; border: 1px solid var(--border); display: block; margin: 0 0 8px; }
article hr { border: 0; border-top: 1px solid var(--border); margin: 34px 0; }
article blockquote { border-left: 3px solid var(--border); padding-left: 16px; color: var(--muted); margin: 0 0 18px; }
kbd {
  display: inline-block; background: var(--panel2); border: 1px solid var(--border);
  border-bottom-width: 2px; padding: 1px 7px; font: 600 .82em/1.5 Inter, sans-serif; color: var(--text);
}
h2 .ancora, h3 .ancora { color: var(--border); margin-left: 10px; font-size: .7em; opacity: 0; }
h2:hover .ancora, h3:hover .ancora { opacity: 1; }

.tabella { overflow-x: auto; margin: 0 0 22px; border: 1px solid var(--border); }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
th, td { text-align: left; padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--panel2); font: 600 .74rem/1.4 Rajdhani, sans-serif; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }

/* riquadri */
.box { border: 1px solid var(--border); border-left-width: 3px; background: var(--panel); padding: 16px 18px; margin: 0 0 22px; }
.box p:last-child, .box ul:last-child, .box ol:last-child { margin-bottom: 0; }
.box::before { display: block; font: 700 .7rem/1 Rajdhani, sans-serif; letter-spacing: .18em; text-transform: uppercase; margin-bottom: 8px; }
.box.nota { border-left-color: var(--accent); }
.box.nota::before { content: 'Nota'; color: var(--accent); }
.box.tip { border-left-color: var(--ok); }
.box.tip::before { content: 'Suggerimento'; color: var(--ok); }
.box.warn { border-left-color: var(--warn); }
.box.warn::before { content: 'Attenzione'; color: var(--warn); }
.box.imp { border-left-color: var(--danger); }
.box.imp::before { content: 'Importante'; color: var(--danger); }
html[lang="en"] .box.nota::before { content: 'Note'; }
html[lang="en"] .box.tip::before { content: 'Tip'; }
html[lang="en"] .box.warn::before { content: 'Warning'; }
html[lang="en"] .box.imp::before { content: 'Important'; }

/* ---------- copertina ---------- */
.carte { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.copertina article { max-width: 1000px; }
.carta { display: block; background: var(--panel); border: 1px solid var(--border); border-top: 2px solid var(--border); padding: 16px 18px 18px; color: var(--text); }
.carta:hover { text-decoration: none; border-top-color: var(--accent); background: var(--panel2); }
.carta em { font-style: normal; font: 600 .68rem/1 Rajdhani, sans-serif; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.carta b { display: block; font: 700 1.14rem/1.2 Rajdhani, sans-serif; text-transform: uppercase; margin: 9px 0 6px; }
.carta span { display: block; color: var(--muted); font-size: .87rem; line-height: 1.5; }

/* ---------- navigazione fra capitoli ---------- */
.giro { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 54px 0 0; max-width: 74ch; }
.giro a { border: 1px solid var(--border); padding: 14px 16px; color: var(--text); background: var(--panel); }
.giro a:hover { text-decoration: none; border-color: var(--accent); }
.giro em { font-style: normal; display: block; font: 600 .68rem/1 Rajdhani, sans-serif; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.giro b { font: 600 1rem/1.25 Inter, sans-serif; }
.giro .n { text-align: right; }

.piede { margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 14px; color: var(--muted); font-size: .82rem; max-width: 74ch; }
.piede nav { margin-left: auto; display: flex; gap: 14px; }
.piede a { color: var(--muted); }

/* ---------- schermi stretti ---------- */
@media (max-width: 1180px) {
  .corpo { grid-template-columns: var(--lato) minmax(0, 1fr); }
  .sommario { display: none; }
}
@media (max-width: 880px) {
  .corpo { grid-template-columns: 1fr; }
  .testa .menu { display: block; }
  .lato {
    position: fixed; inset: var(--testa) auto 0 0; width: min(320px, 86vw); z-index: 25;
    background: var(--bg); transform: translateX(-102%); transition: transform .18s ease;
    border-right: 1px solid var(--border);
  }
  body.indice-aperto .lato { transform: none; }
  body.indice-aperto::after { content: ''; position: fixed; inset: var(--testa) 0 0 0; background: rgba(0,0,0,.5); z-index: 24; }
  main { padding: 26px 20px 50px; }
  .giro { grid-template-columns: 1fr; }
}

/* ---------- stampa ---------- */
@media print {
  :root { --testa: 0px; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .testa, .lato, .sommario, .giro, .salta { display: none !important; }
  .corpo { display: block; max-width: none; }
  main { padding: 0; }
  article { max-width: none; }
  a { color: #000; text-decoration: underline; }
  article h1, article h2, article h3 { color: #000; page-break-after: avoid; }
  article h2 { border-top: 2px solid #000; display: block; }
  .box, .tabella, pre, table { page-break-inside: avoid; border-color: #999; background: #f5f5f5; }
  article code, kbd { color: #000; background: #eee; border-color: #ccc; }
  .ancora { display: none; }
  /* l'indirizzo dei link esterni, altrimenti sulla carta il link è un vicolo cieco */
  article a[href^="http"]::after { content: ' (' attr(href) ')'; font-size: .8em; color: #555; }
}