/* ---------------------------------------------------------------------------
   texforge — documentazione
   Impianto editoriale: carta e inchiostro, un solo accento verde, titoli in
   serif. Nessun font remoto: il sito non contatta nessuno.
   --------------------------------------------------------------------------- */

:root {
  --ink:      #191c17;
  --ink-soft: #43483e;
  --ink-dim:  #6e7268;
  --paper:    #f7f6f1;
  --paper-alt:#f0eee6;
  --card:     #fffefb;
  --line:     #ddd9cd;
  --line-dim: #eae7dd;
  --accent:   #3f5d3a;
  --accent-soft: #eaefe7;
  --accent-ink:  #2d4429;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --r: 4px;
  --r-lg: 10px;
  --wrap: 74rem;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:      #eceade;
    --ink-soft: #b7b5a8;
    --ink-dim:  #8b897d;
    --paper:    #12140f;
    --paper-alt:#181b15;
    --card:     #1d2019;
    --line:     #32362b;
    --line-dim: #262a20;
    --accent:   #a8c79f;
    --accent-soft: #212a1e;
    --accent-ink:  #c3ddba;
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px;
}

code, pre, .sig { font-family: var(--mono); font-size: 0.875em; }

/* codice inline: un filo di sfondo, non un bottone */
:not(pre) > code {
  background: var(--paper-alt);
  border: 1px solid var(--line-dim);
  border-radius: var(--r);
  padding: 0.08em 0.32em;
  /* Va a capo solo se non ci sta: `\numerica{3.14}{0.01}` su uno schermo
     stretto altrimenti allargherebbe la pagina. */
  overflow-wrap: break-word;
}

.sr {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}

.skip {
  position: absolute; left: 1rem; top: -3rem; z-index: 60;
  background: var(--accent); color: var(--paper);
  padding: 0.55rem 0.9rem; border-radius: var(--r);
  transition: top 0.15s;
}
.skip:focus { top: 1rem; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 1.75rem; }

/* Una colonna di griglia non scende sotto la larghezza minima del proprio
   contenuto: basta un blocco di codice o una firma lunga perché la pagina si
   allarghi e compaia lo scorrimento orizzontale. Azzerare il minimo sui figli
   delle griglie lo evita una volta per tutte, e i blocchi che non ci stanno
   scorrono per conto proprio. */
.hero-grid > *, .split > *, .split-out > *, .cards > *,
.split-note > *, .foot-grid > *, .ref-item > * { min-width: 0; }
pre { min-width: 0; }

/* ── barra superiore ────────────────────────────────────────────────────── */

.bar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.85rem 1.75rem;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.bar.scrolled { border-bottom-color: var(--line); }

.bar-brand { display: flex; align-items: baseline; gap: 0.5rem; color: var(--ink); }
.bar-brand:hover { text-decoration: none; }

/* il marchio: "tex" in mono con una freccia disegnata, non un'emoji */
.mark {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  border: 1px solid currentColor; border-radius: var(--r);
  padding: 0.1rem 0.35rem 0.1rem 0.4rem;
  position: relative;
}
.mark::after {
  content: "→"; margin-left: 0.28rem; font-weight: 400;
}
.bar-name { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; }

.bar-links {
  display: flex; align-items: center; gap: 1.4rem;
  list-style: none; margin-left: auto;
  font-size: 0.925rem;
}
.bar-links a { color: var(--ink-soft); }
.bar-links a:hover { color: var(--accent); text-decoration: none; }
.bar-links a[aria-current="true"] { color: var(--accent); }

.bar-cta {
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 0.32rem 0.8rem;
}
.bar-cta:hover { border-color: var(--accent); background: var(--accent-soft); }

.bar-toggle {
  display: none; margin-left: auto;
  background: none; border: 1px solid var(--line); border-radius: var(--r);
  padding: 0.45rem 0.55rem; cursor: pointer; color: var(--ink);
}
.bar-toggle-box { display: block; width: 18px; }
.bar-toggle-box span {
  display: block; height: 1.5px; background: currentColor; border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.bar-toggle-box span + span { margin-top: 5px; }
.bar-toggle[aria-expanded="true"] .bar-toggle-box span:first-child { transform: translateY(3.25px) rotate(45deg); }
.bar-toggle[aria-expanded="true"] .bar-toggle-box span + span { transform: translateY(-3.25px) rotate(-45deg); }

@media (max-width: 860px) {
  .bar { flex-wrap: wrap; }
  .bar-toggle { display: block; }
  .bar-links {
    display: none; width: 100%; margin: 0.85rem 0 0.2rem;
    flex-direction: column; align-items: stretch; gap: 0;
    border-top: 1px solid var(--line);
  }
  .bar-links.open { display: flex; }
  .bar-links li { border-bottom: 1px solid var(--line-dim); }
  .bar-links a { display: block; padding: 0.75rem 0.15rem; }
  .bar-cta { border: none; padding: 0.75rem 0.15rem; }
}

/* ── apertura ───────────────────────────────────────────────────────────── */

.hero { padding: 4.5rem 0 3.5rem; border-bottom: 1px solid var(--line); }

.hero-grid {
  display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 3.5rem; align-items: start;
}
@media (max-width: 980px) { .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; } }

.kicker {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--ink-dim); margin-bottom: 1.1rem;
}

.hero h1 { font-size: clamp(2.1rem, 5vw, 3.05rem); margin-bottom: 1.1rem; }

.lead { font-size: 1.06rem; color: var(--ink-soft); max-width: var(--measure); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.9rem; }

.btn {
  display: inline-block;
  background: var(--accent); color: var(--paper);
  border: 1px solid var(--accent);
  padding: 0.62rem 1.15rem; border-radius: var(--r);
  font-size: 0.95rem; font-weight: 500;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; text-decoration: none; }
@media (prefers-color-scheme: dark) { .btn { color: var(--paper); } }

.btn-quiet {
  background: none; color: var(--ink); border-color: var(--line);
}
.btn-quiet:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); opacity: 1; }

.hero-note { margin-top: 1.2rem; font-size: 0.9rem; color: var(--ink-dim); }

/* confronto sorgente → due output */

.split { display: grid; gap: 0.8rem; }
.split-cap {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.tag {
  display: inline-block; font-family: var(--mono); font-size: 0.72rem;
  color: var(--ink-dim); margin-bottom: 0.6rem;
}

.split-src, .mock {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 1rem 1.1rem;
}
.split-src pre { overflow-x: auto; }
.split-src code { font-size: 0.78rem; line-height: 1.65; }

.split-out { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
@media (max-width: 620px) { .split-out { grid-template-columns: minmax(0, 1fr); } }

.mock { font-size: 0.82rem; }
.mock-pdf { font-family: var(--serif); }
.mock-q { margin-bottom: 0.6rem; }
.mock-pt { color: var(--ink-dim); font-size: 0.92em; }
.mock-o { display: flex; align-items: center; gap: 0.5rem; padding: 0.13rem 0; }

.box {
  width: 0.72em; height: 0.72em; flex: none;
  border: 1px solid var(--ink-soft);
}
.dot {
  width: 0.78em; height: 0.78em; flex: none;
  border: 1px solid var(--ink-soft); border-radius: 50%;
}
.dot-on {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 2.5px var(--card), inset 0 0 0 1em var(--accent);
}
.mock-on { color: var(--accent-ink); }

.mock-foot {
  margin-top: 0.75rem; padding-top: 0.6rem; border-top: 1px solid var(--line-dim);
  font-size: 0.75rem; color: var(--ink-dim); font-family: var(--sans);
}
.chip {
  display: inline-block; background: var(--accent-soft); color: var(--accent-ink);
  border-radius: 999px; padding: 0.15rem 0.6rem; font-weight: 500;
}

/* ── sezioni ────────────────────────────────────────────────────────────── */

.sec { padding: 4.5rem 0; }
.sec-alt { background: var(--paper-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.sec-head { max-width: var(--measure); margin-bottom: 2.75rem; }

/* etichetta di sezione: una riga sopra il titolo, non un numerino decorativo */
.rail {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--accent); font-weight: 600;
  padding-bottom: 0.7rem; margin-bottom: 0.9rem;
  border-bottom: 1px solid var(--line);
}
.sec-head h2 { font-size: clamp(1.55rem, 3.2vw, 2.05rem); margin-bottom: 0.85rem; }
.sub { color: var(--ink-soft); }

.mini-head { font-size: 1.15rem; margin: 3rem 0 1rem; }
.prelude { color: var(--ink-soft); max-width: var(--measure); margin-bottom: 1rem; }
.small { font-size: 0.88rem; color: var(--ink-dim); max-width: var(--measure); margin-top: 0.9rem; }

/* blocchi di codice a piena larghezza */
pre.block {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 1.15rem 1.3rem; overflow-x: auto; margin: 1rem 0;
}
pre.block code { font-size: 0.82rem; line-height: 1.7; }

/* evidenziazione: due sole classi, applicate a mano nel markup */
.k { color: var(--accent); }
.c { color: var(--ink-dim); font-style: italic; }
.a { color: var(--ink-soft); }

/* schede affiancate */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
@media (max-width: 940px) { .cards { grid-template-columns: minmax(0, 1fr); } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 1.5rem 1.6rem;
}
.card h3 { font-size: 1.18rem; margin-bottom: 0.7rem; }
.card p { font-size: 0.94rem; color: var(--ink-soft); }
.card p + p { margin-top: 0.8rem; }

/* riquadro di avvertenza, sobrio */
.note {
  margin-top: 2rem; padding: 1.4rem 1.6rem;
  background: var(--accent-soft); border: 1px solid var(--line);
  border-left: 3px solid var(--accent); border-radius: var(--r-lg);
}
.note h3 { font-size: 1.08rem; margin-bottom: 0.55rem; }
.note p { font-size: 0.94rem; color: var(--ink-soft); max-width: 60rem; }
.note p + p { margin-top: 0.7rem; }

/* elenco numerato dei passaggi */
.steps { list-style: none; counter-reset: s; display: grid; gap: 1.6rem; }
.steps li { counter-increment: s; padding-left: 3.2rem; position: relative; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: 0.05rem;
  width: 2.1rem; height: 2.1rem;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 0.82rem;
  color: var(--accent);
  border: 1px solid var(--line); border-radius: 50%;
  background: var(--card);
}
.steps h3 { font-size: 1.12rem; margin-bottom: 0.4rem; }
.steps p { color: var(--ink-soft); font-size: 0.95rem; max-width: 46rem; }
.steps p + p { margin-top: 0.55rem; }

/* due colonne di testo */
.split-note {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2rem;
  margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--line);
}
@media (max-width: 860px) { .split-note { grid-template-columns: minmax(0, 1fr); gap: 1.6rem; } }
.split-note h3 { font-size: 1.08rem; margin-bottom: 0.5rem; }
.split-note p { color: var(--ink-soft); font-size: 0.94rem; }

/* ── tabelle ────────────────────────────────────────────────────────────── */

.tbl-scroll { overflow-x: auto; margin-top: 1.25rem; }

.tbl {
  width: 100%; border-collapse: collapse; font-size: 0.92rem;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden;
}
.tbl caption {
  caption-side: top; text-align: left;
  font-size: 0.86rem; color: var(--ink-dim); padding-bottom: 0.7rem;
}
.tbl th, .tbl td {
  text-align: left; padding: 0.8rem 1rem; vertical-align: top;
  border-bottom: 1px solid var(--line-dim);
}
.tbl thead th {
  font-family: var(--sans); font-size: 0.78rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink-dim); background: var(--paper-alt);
  border-bottom: 1px solid var(--line);
}
.tbl tbody tr:last-child th, .tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody th { font-family: var(--sans); font-size: 0.92rem; font-weight: 600; white-space: nowrap; }
.tbl td { color: var(--ink-soft); }
.tbl-wide { min-width: 46rem; }
/* Un comando spezzato a metà opzione si legge male; la tabella sta già in un
   contenitore che scorre, quindi può restare su una riga. */
.tbl code { white-space: nowrap; }

/* ── riferimento dei comandi ────────────────────────────────────────────── */

.ref { display: grid; gap: 0; border-top: 1px solid var(--line); }

.ref-item {
  display: grid; grid-template-columns: minmax(0, 21rem) minmax(0, 1fr);
  gap: 1.5rem 2.5rem;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 940px) {
  .ref-item { grid-template-columns: minmax(0, 1fr); gap: 0.9rem; }
}

/* align-content: start tiene l'etichetta attaccata alla firma: senza, le due
   righe del flex si distribuiscono sull'altezza della riga e il badge finisce
   in fondo alla colonna, staccato da ciò che etichetta. */
.ref-item dt {
  display: flex; flex-wrap: wrap; align-items: center; align-content: start;
  gap: 0.6rem;
}
.sig {
  display: block; width: 100%;
  color: var(--ink); line-height: 1.6; word-break: break-word;
}
.badge {
  font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 0.1rem 0.55rem;
}

.ref-item dd p { color: var(--ink-soft); font-size: 0.95rem; }
.ref-item dd p + p { margin-top: 0.7rem; }

.args { font-size: 0.9rem; }

/* mappatura PDF / HTML */
.out { display: grid; gap: 0.4rem; margin-top: 0.9rem !important; }
.out span {
  font-size: 0.88rem; color: var(--ink-soft);
  padding-left: 0.9rem; border-left: 2px solid var(--line);
}
.out b {
  font-family: var(--mono); font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.04em; color: var(--ink-dim);
  margin-right: 0.4rem;
}

/* ── esempi a schede ────────────────────────────────────────────────────── */

.tabs { display: flex; flex-wrap: wrap; gap: 0.35rem; border-bottom: 1px solid var(--line); }
.tab {
  background: none; border: none; cursor: pointer;
  font-family: var(--mono); font-size: 0.83rem; color: var(--ink-dim);
  padding: 0.6rem 0.9rem;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--ink); }
.tab.is-on { color: var(--accent); border-bottom-color: var(--accent); }

.pane { display: none; }
.pane.is-on { display: block; }
.pane-intro { color: var(--ink-soft); font-size: 0.95rem; margin-top: 1.4rem; max-width: var(--measure); }

.dl-row { margin-top: 1.5rem; font-size: 0.92rem; color: var(--ink-soft); }

/* ── piede ──────────────────────────────────────────────────────────────── */

.foot {
  background: var(--paper-alt); border-top: 1px solid var(--line);
  padding: 3rem 0 2.2rem; margin-top: 0;
}
.foot-grid {
  display: grid; grid-template-columns: minmax(0, 2fr) 1fr 1fr; gap: 2.5rem;
}
@media (max-width: 780px) { .foot-grid { grid-template-columns: minmax(0, 1fr); gap: 1.8rem; } }

.foot-brand {
  display: flex; align-items: baseline; gap: 0.5rem;
  font-family: var(--serif); font-size: 1.1rem; font-weight: 600;
  margin-bottom: 0.7rem;
}
.foot-tag { font-size: 0.9rem; color: var(--ink-dim); max-width: 32rem; }

.foot-col h2 {
  font-family: var(--sans); font-size: 0.76rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--ink-dim); margin-bottom: 0.85rem;
}
.foot-col a { display: block; font-size: 0.92rem; color: var(--ink-soft); padding: 0.16rem 0; }
.foot-col a:hover { color: var(--accent); }

/* ── torna su, avviso di copia ──────────────────────────────────────────── */

.up {
  position: fixed; right: 1.4rem; bottom: 1.4rem; z-index: 40;
  width: 2.5rem; height: 2.5rem;
  display: grid; place-items: center;
  background: var(--card); color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 50%;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, color 0.15s, border-color 0.15s;
}
.up.show { opacity: 1; pointer-events: auto; }
.up:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

.toast {
  position: fixed; left: 50%; bottom: 1.6rem; z-index: 60;
  transform: translate(-50%, 0.6rem);
  background: var(--ink); color: var(--paper);
  font-size: 0.85rem; padding: 0.5rem 0.95rem; border-radius: var(--r);
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* i blocchi copiabili lo dicono al passaggio del mouse */
pre code { cursor: pointer; }

@media print {
  .bar, .up, .toast, .skip, .hero-actions { display: none; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .sec, .hero { padding: 1.2rem 0; border: none; }
  .pane { display: block !important; }
}