/* Voidmass-1: quattro stili, derivati da Barlow con il punto dentro la O
   maiuscola. ✅ Barlow e' SIL OFL senza Reserved Font Name, quindi questo font
   si puo' pubblicare; `fonts/OFL.txt` deve accompagnarlo.
   ⚠ I corsivi sono VERI, non il tondo inclinato dal browser: la wiki usa il
   corsivo molto (termini tecnici) e un corsivo finto si vede subito. */
@font-face { font-family:"Voidmass"; src:url("../fonts/Voidmass-1-Regular.woff2") format("woff2");
             font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:"Voidmass"; src:url("../fonts/Voidmass-1-Italic.woff2") format("woff2");
             font-weight:400; font-style:italic; font-display:swap; }
@font-face { font-family:"Voidmass"; src:url("../fonts/Voidmass-1-SemiBold.woff2") format("woff2");
             font-weight:600; font-style:normal; font-display:swap; }
@font-face { font-family:"Voidmass"; src:url("../fonts/Voidmass-1-SemiBoldItalic.woff2") format("woff2");
             font-weight:600; font-style:italic; font-display:swap; }

/* Voidmass — wiki dell'ambientazione.
   Registro: sobrio, enciclopedico, materialista. Niente epica, niente utopia.
   Chiaro e scuro seguono il sistema; entrambi sono tarati per lettura lunga. */

:root {
  --bg:        #f7f6f3;
  --bg-sink:   #efeee9;
  --bg-raise:  #ffffff;
  --ink:       #1b1d21;
  --ink-soft:  #55595f;
  --ink-faint: #868b92;
  --rule:      #dcdad3;
  --rule-soft: #e8e6e0;
  --accent:    #1f6f7a;
  --accent-dim:#5d949b;
  --mark:      #b4442e;

  --display: "Voidmass", ui-sans-serif, system-ui, "Segoe UI", sans-serif;
  --sans: ui-sans-serif, system-ui, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;

  --sidebar-w: 17rem;
  --toc-w: 14rem;
  /* ⚠ Nessun limite di misura sull'articolo: il contenitore ha gia il suo
     tetto, e le tabelle devono poter usare tutta la colonna
     (decisione utente, 2026-09-21). */
  --shell-max: 120rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #0e1013;
    --bg-sink:   #090a0d;
    --bg-raise:  #15181d;
    --ink:       #dde0e4;
    --ink-soft:  #a0a6ae;
    --ink-faint: #6d747d;
    --rule:      #262b32;
    --rule-soft: #1c2026;
    --accent:    #6fc6d2;
    --accent-dim:#3d7c86;
    --mark:      #e0664a;
  }
}

:root[data-theme="dark"] {
  --bg:        #0e1013;
  --bg-sink:   #090a0d;
  --bg-raise:  #15181d;
  --ink:       #dde0e4;
  --ink-soft:  #a0a6ae;
  --ink-faint: #6d747d;
  --rule:      #262b32;
  --rule-soft: #1c2026;
  --accent:    #6fc6d2;
  --accent-dim:#3d7c86;
  --mark:      #e0664a;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--ink); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--bg); padding: .6rem 1rem;
  font-family: var(--sans); font-size: .875rem;
}
.skip:focus { left: 0; }

/* ---------------------------------------------------------------- barra */

.bar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1rem; height: 3.5rem;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
}

.brand { display: flex; align-items: baseline; gap: .55rem; text-decoration: none; color: var(--ink); }
/* Il Reticolo: la cella di matrice del cap. 15, con la luna nucleata dentro. */
.brand-mark { width: 1.5rem; height: 1.5rem; align-self: center; flex: none; display: block; }
.brand-name { font-family: var(--display); font-weight: 600; letter-spacing: .1em; text-transform: uppercase; font-size: .9rem; }
.brand-tag {
  color: var(--ink-faint); font-size: .8rem; letter-spacing: .02em;
  padding-left: .55rem; border-left: 1px solid var(--rule);
}

/* Selettore del tema. La pastiglia attiva e' uno pseudo-elemento che SCORRE
   fra le due voci: i due pulsanti hanno larghezza uguale (flex 1 1 0), quindi
   basta traslarla del 100%. ⚠ Nessuna scelta esplicita -> la pastiglia parte
   dalla preferenza di sistema, la posiziona lo script. */
.themes {
  position: relative; margin-left: auto;
  display: flex; gap: 0;
  padding: 2px; border: 1px solid var(--rule); border-radius: 999px;
  background: var(--bg-sink);
}
.themes::before {
  content: ""; position: absolute; z-index: 0;
  top: 2px; bottom: 2px; left: 2px; width: calc(50% - 2px);
  border-radius: 999px; background: var(--bg-raise);
  box-shadow: inset 0 0 0 1px var(--accent-dim);
  transform: translateX(0);
  transition: transform .26s cubic-bezier(.34, 1.3, .48, 1);
}
.themes[data-active="light"]::before { transform: translateX(100%); }
.theme {
  position: relative; z-index: 1; flex: 1 1 0; min-width: 3.1rem;
  font-family: var(--sans); font-size: .76rem; line-height: 1;
  color: var(--ink-faint); background: none; border: 0; cursor: pointer;
  padding: .4rem .6rem; border-radius: 999px; white-space: nowrap;
  text-align: center; transition: color .2s ease;
}
.theme:hover { color: var(--ink); }
.theme.on { color: var(--ink); font-weight: 600; }

/* ⚠ La transizione dei colori si accende SOLO durante il cambio: lasciarla
   sempre attiva farebbe strisciare i colori anche al caricamento. */
html.theme-anim, html.theme-anim body,
html.theme-anim .bar, html.theme-anim .sidebar, html.theme-anim .toc,
html.theme-anim .pg, html.theme-anim .search-input, html.theme-anim .themes,
html.theme-anim article table, html.theme-anim article blockquote,
html.theme-anim .table-wrap, html.theme-anim .chapters a {
  transition: background-color .3s ease, color .3s ease, border-color .3s ease;
}

/* Lingue: due link normali separati da una barra, non un controllo a pulsanti. */
.langs { display: flex; align-items: baseline; gap: .38rem; margin-left: .9rem; }
.lang {
  font-family: var(--sans); font-size: .78rem; font-weight: 500;
  letter-spacing: .04em; text-decoration: none; color: var(--ink-faint);
}
.lang:hover { color: var(--ink); text-decoration: underline; text-underline-offset: .2em; }
.lang.on { color: var(--ink); font-weight: 650; }
.lang-sep { color: var(--rule); font-size: .78rem; }

.menu-btn { display: none; }

/* ------------------------------------------------------------- ricerca */

.search {
  position: relative; flex: 1 1 auto;
  max-width: 34rem; margin: 0 auto;
  display: flex; align-items: center;
}
.search-icon {
  position: absolute; left: .7rem; width: 1rem; height: 1rem;
  color: var(--ink-faint); pointer-events: none;
}
.search-input {
  width: 100%; font-family: var(--sans); font-size: .85rem;
  padding: .48rem .8rem .48rem 2.2rem;
  color: var(--ink); background: var(--bg-sink);
  border: 1px solid var(--rule); border-radius: 6px;
  appearance: none;
}
.search-input::placeholder { color: var(--ink-faint); }
.search-input:focus {
  outline: none; border-color: var(--accent-dim);
  background: var(--bg-raise);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.search-input::-webkit-search-cancel-button { filter: grayscale(1) opacity(.6); }

.search-panel {
  position: absolute; top: calc(100% + .45rem); left: 0; right: 0; z-index: 60;
  max-height: min(70vh, 32rem); overflow-y: auto;
  background: var(--bg-raise); border: 1px solid var(--rule);
  border-radius: 8px; box-shadow: 0 16px 40px rgba(0,0,0,.28);
  padding: .3rem;
}
.sr-hit, .sr-row {
  display: block; text-decoration: none; color: inherit;
  padding: .55rem .65rem; border-radius: 5px;
}
.sr-hit:hover, .sr-hit.on { background: var(--bg-sink); }
.sr-where {
  display: block; font-family: var(--sans); font-size: .78rem;
  color: var(--ink); font-weight: 600; margin-bottom: .18rem;
}
.sr-num {
  display: inline-block; min-width: 1.5rem;
  color: var(--accent); font-variant-numeric: tabular-nums; font-weight: 500;
}
.sr-sep { color: var(--ink-faint); font-weight: 400; }
.sr-snip {
  display: block; font-family: var(--sans); font-size: .775rem;
  line-height: 1.45; color: var(--ink-soft);
}
.sr-snip mark {
  background: color-mix(in srgb, var(--accent) 26%, transparent);
  color: var(--ink); border-radius: 2px; padding: 0 .1em;
}
.sr-none { margin: 0; padding: .7rem; font-family: var(--sans); font-size: .8rem; color: var(--ink-faint); }

/* pagina dei risultati completi */
.sr-status { font-family: var(--sans); font-size: .85rem; color: var(--ink-faint); margin-bottom: 1.5rem; }
.sr-row { border-bottom: 1px solid var(--rule-soft); border-radius: 0; padding: .9rem .2rem; }
.sr-row:hover { background: var(--bg-sink); }

/* -------------------------------------------------------------- impianto */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 0;
  max-width: var(--shell-max); margin: 0 auto;
  align-items: start;
  position: relative;
}
/* ⚠ Il filo verticale appartiene alla GRIGLIA, non alla barra laterale: come
   bordo della barra finiva dove finiva l'elenco dei capitoli, lasciando la
   colonna aperta in basso. Cosi arriva fino in fondo e incontra il bordo del
   footer ad angolo retto. */
.shell::before {
  content: ""; position: absolute; z-index: 0;
  top: 0; bottom: 0; left: var(--sidebar-w); width: 1px;
  background: var(--rule-soft);
}

.side-title {
  font-family: var(--sans); font-size: .7rem; font-weight: 600;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .9rem;
}

/* ------------------------------------------------------------- capitoli */

.sidebar {
  position: sticky; top: 3.5rem;
  max-height: calc(100vh - 3.5rem); overflow-y: auto;
  padding: 1.75rem 1.25rem 3rem;
  font-family: var(--sans);
}

.chapters { list-style: none; margin: 0; padding: 0; }
.chapters li { margin: 0; }
.chapters a {
  display: grid; grid-template-columns: 1.7rem 1fr; gap: .5rem;
  padding: .36rem .5rem .36rem .55rem;
  text-decoration: none; color: var(--ink-soft);
  font-size: .855rem; line-height: 1.4;
  border-left: 2px solid transparent; border-radius: 0 3px 3px 0;
}
.chapters a:hover { color: var(--ink); background: var(--bg-sink); }
.ch-num { color: var(--ink-faint); font-variant-numeric: tabular-nums; font-size: .78rem; padding-top: .07em; }
.chapters .here > a { color: var(--ink); border-left-color: var(--accent); background: var(--bg-sink); font-weight: 600; }
.chapters .here .ch-num { color: var(--accent); }

/* ------------------------------------------------------------ contenuto */

.content {
  min-width: 0;
  padding: 2.75rem 3rem 5rem;
}
.content.narrow { max-width: 40rem; margin: 0 auto; }

article h1 {
  font-family: var(--display);
  font-size: 2.1rem; line-height: 1.2; letter-spacing: .01em;
  margin: 0 0 1.6rem; font-weight: 600;
}
article h2 {
  font-family: var(--display);
  font-size: 1.26rem; line-height: 1.32; font-weight: 600; letter-spacing: .012em;
  margin: 2.9rem 0 .85rem; padding-top: 1.1rem;
  border-top: 1px solid var(--rule-soft);
}
article h3 {
  font-family: var(--display);
  font-size: 1.02rem; font-weight: 600; letter-spacing: .01em; margin: 2rem 0 .6rem;
  color: var(--ink);
}
article h2 a, article h3 a { text-decoration: none; }

article p { margin: 0 0 1.15rem; }
article { overflow-wrap: break-word; }
article strong { font-weight: 650; }
article em { font-style: italic; }

article ul, article ol { margin: 0 0 1.15rem; padding-left: 1.35rem; }
article li { margin: 0 0 .45rem; }
article li > ul, article li > ol { margin-top: .45rem; }

article blockquote {
  margin: 1.5rem 0; padding: .9rem 1.1rem;
  background: var(--bg-sink);
  border-left: 3px solid var(--accent-dim);
  border-radius: 0 4px 4px 0;
  font-size: .96rem;
}
article blockquote p:last-child { margin-bottom: 0; }
article blockquote strong:first-child {
  font-family: var(--sans); font-size: .7rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
}

article hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

article code {
  font-family: var(--mono); font-size: .875em;
  background: var(--bg-sink); border: 1px solid var(--rule-soft);
  padding: .08em .35em; border-radius: 3px;
}

/* tabelle: contenuto di prima classe, e devono poter scorrere da sole
   invece di trascinarsi dietro tutta la pagina su schermo stretto */
.table-wrap {
  margin: 1.5rem 0; overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}
article table {
  width: 100%; margin: 0; border-collapse: collapse;
  font-family: var(--sans); font-size: .855rem; line-height: 1.5;
}
article thead th {
  text-align: left; font-weight: 600; color: var(--ink);
  padding: .5rem .7rem; border-bottom: 2px solid var(--rule);
  white-space: nowrap;
}
article tbody td {
  padding: .5rem .7rem; border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
article tbody tr:hover td { background: var(--bg-sink); }
article table strong { font-weight: 650; }

/* --------------------------------------------------------- indice pagina */

.toc {
  position: sticky; top: 3.5rem;
  max-height: calc(100vh - 3.5rem); overflow-y: auto;
  padding: 2.9rem 1.25rem 3rem .5rem;
  font-family: var(--sans);
}
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--rule-soft); }
.toc li { margin: 0; }
.toc a {
  display: block; padding: .25rem 0 .25rem .8rem; margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: .795rem; line-height: 1.4;
  color: var(--ink-faint); text-decoration: none;
}
.toc a:hover { color: var(--ink); }
.toc li.lv3 a { padding-left: 1.6rem; font-size: .765rem; }
.toc a.active { color: var(--accent); border-left-color: var(--accent); }

/* ---------------------------------------------------------------- pager */

.pager {
  display: flex; gap: 1rem; justify-content: space-between;
  max-width: var(--measure);
  margin-top: 3.5rem; padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
}
/* La freccia e' disegnata coi bordi, non e' un glifo: resta nitida a ogni
   dimensione e non dipende dal font. La griglia la tiene a fianco del testo,
   a sinistra per il precedente e a destra per il successivo. */
.pg {
  display: grid; align-items: center; gap: .1rem .75rem;
  grid-template-columns: auto 1fr;
  grid-template-areas: "chev dir" "chev title";
  text-decoration: none; max-width: 46%;
  padding: .7rem .9rem; border: 1px solid var(--rule); border-radius: 5px;
  background: var(--bg-raise);
}
.pg::before {
  content: ""; grid-area: chev;
  width: .46rem; height: .46rem;
  border-left: 2px solid var(--ink-faint);
  border-bottom: 2px solid var(--ink-faint);
  transform: rotate(45deg);
  transition: border-color .12s ease;
}
.pg.next { grid-template-columns: 1fr auto; grid-template-areas: "dir chev" "title chev";
           text-align: right; margin-left: auto; }
.pg.next::before { transform: rotate(-135deg); }
.pg-dir { grid-area: dir; }
.pg-title { grid-area: title; }
.pg:hover { border-color: var(--accent-dim); }
.pg:hover::before { border-color: var(--accent); }
.pg-dir { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.pg-title { font-size: .875rem; color: var(--ink); line-height: 1.35; }

/* ------------------------------------------------------------------ 404 */

body.plain .content { padding-top: 5rem; }
.code-404 {
  font-family: var(--mono); font-size: 3.5rem; line-height: 1;
  color: var(--accent-dim); margin: 0 0 .5rem;
}
.home-link { font-family: var(--sans); font-size: .9rem; }

/* ------------------------------------------------------------------ footer */

.site-foot p { margin: 0; }
.site-foot {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 340px;
  padding: 111px 24px 39px;
  border-top: 1px solid #252d35;
  background: #090c10;
  color: #b9c4cc;
  font-family: var(--display);
  font-size: .78rem; line-height: 1.6;
  text-align: center;
}
.site-foot::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(#0e101340, transparent 30%), url("../images/footer-planet.png") center -20px / max(100%, 1100px) auto no-repeat;
  opacity: .82;
}
.site-foot .foot-name {
  display: inline-block;
  color: #e0e7ed;
  font-size: clamp(26px, 3vw, 35px);
  line-height: 1.2;
  font-weight: 400;
  letter-spacing: .36em;
  padding-left: .36em;
  text-decoration: none;
}
.site-foot .foot-name:focus-visible { outline: 1px solid #b9d8e0; outline-offset: 8px; }
.site-foot .foot-name { display: flex; align-items: center; justify-content: center; height: 42px; padding-left: 0; flex-shrink: 0; }
.site-foot .foot-name img { display: block; width: auto; height: 25px; max-width: 100%; }
.foot-lockup { display: flex; align-items: center; justify-content: center; gap: 23px; }
.foot-lockup::before, .foot-lockup::after { content: ""; width: 100px; height: 1px; background: linear-gradient(90deg, transparent, #556773); }
.foot-lockup::after { transform: rotate(180deg); }
.foot-description {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 1180px;
  margin: 16px auto 0;
}
.site-foot .foot-description p {
  max-width: 650px;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: .045em;
  text-wrap: balance;
}
.site-foot .foot-credit { margin: 16px auto 0; color: #91a1ae; font-size: 11px; letter-spacing: .3em; }
@media (max-width: 600px) {
  .site-foot { min-height: 325px; padding: 103px 24px 30px; }
  .site-foot .foot-name { height: 32.4px; }
  .site-foot .foot-name img { height: 19px; }
  .site-foot .foot-description p { font-size: 14px; letter-spacing: .025em; }
  .foot-description { margin-top: 14px; }
  .foot-lockup { gap: 14px; }
  .site-foot .foot-credit { margin-top: 14px; }
  .foot-lockup::before, .foot-lockup::after { width: 55px; }
}

.site-foot .foot-credit a { color: inherit; text-decoration: none; }
.site-foot .foot-credit a:hover { color: #e0e7ed; text-decoration: underline; }
.site-foot .foot-credit a:focus-visible { outline: 1px solid #b9d8e0; outline-offset: 4px; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 1180px) {
  .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
  .content { padding: 2.5rem 2.25rem 4rem; }
}

@media (max-width: 820px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .shell::before { display: none; }
  .content { padding: 1.75rem 1rem 3.5rem; }
  article h1 { font-size: 1.7rem; }
  .brand-tag { display: none; }

  /* il menu impilato funziona anche senza script: la versione a scomparsa
     si attiva solo quando lo script ha marcato <body> */
  body.is-enhanced .menu-btn {
    display: flex; align-items: center; gap: .45rem; order: 4;
    min-height: 2.5rem; padding: 0 .65rem;
    background: none; border: 1px solid var(--rule); border-radius: 5px;
    color: var(--ink-soft); font-family: var(--sans); font-size: .78rem;
    cursor: pointer;
  }
  .menu-bars { width: .95rem; height: 2px; background: currentColor; box-shadow: 0 5px currentColor, 0 -5px currentColor; }
  .themes { order: 2; margin-left: auto; }
  .langs { order: 3; margin-left: .4rem; }
  .theme { padding: .3rem .55rem; font-size: .72rem; }
  .lang { padding: .3rem .55rem; font-size: .72rem; }

  /* la ricerca scende sotto la barra e la occupa tutta */
  .bar { flex-wrap: wrap; height: auto; padding: .6rem 1rem; row-gap: .55rem; }
  .search { order: 4; flex: 1 0 100%; max-width: none; margin: 0; }
  .search-panel { max-height: 60vh; }
  .sidebar, body.is-enhanced .sidebar { inset: auto 0 auto 0; top: var(--bar-h, 6.4rem); }

  body.is-enhanced .sidebar {
    position: fixed; inset: 3.5rem 0 auto 0; z-index: 35;
    max-height: calc(100vh - 3.5rem); overflow-y: auto;
    padding: 1rem 1rem 1.5rem;
    background: var(--bg-raise); border-bottom: 1px solid var(--rule);
    border-right: 0;
    transform: translateY(-101%); visibility: hidden;
    transition: transform .18s ease, visibility .18s;
  }
  body.is-enhanced .sidebar.open { transform: translateY(0); visibility: visible; }
  .chapters a { min-height: 2.9rem; align-items: center; font-size: .9rem; }

  .backdrop { position: fixed; inset: 0; z-index: 30; background: rgba(0,0,0,.45); }
  body.menu-open { overflow: hidden; }
}

@media (prefers-reduced-motion: reduce) {
  .bar.is-enhanced ~ .shell .sidebar { transition: none; }
}

@media print {
  .bar, .sidebar, .toc, .pager, .skip, .backdrop { display: none !important; }
  .site-foot { border: 0; color: #555; background: none; min-height: 0; padding: 1rem 0; }
  .site-foot::before, .foot-lockup::before, .foot-lockup::after { display: none; }
  .site-foot .foot-name, .site-foot .foot-credit { color: #555; }
  .shell { display: block; }
  .content { padding: 0; }
  body { background: #fff; color: #000; }
}