/* laroba — sistema visivo
   Tema: la forgia. Antracite come base, incandescenza come accento, acciaio
   per i toni secondari. Niente gradienti viola, niente estetica generica. */

:root {
  --void: #08080a;
  --iron: #0f0f13;
  --steel: #16161c;
  --shelf: #1d1d25;
  --edge: #2a2a34;
  --zinc: #6b7080;
  --ash: #9a9aa6;
  --chalk: #eceae5;
  --molten: #ff5a1f;
  --amber: #ffab2e;
  --glow: 255 90 31;

  --measure: 74ch;
  --bar-h: 60px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-io: cubic-bezier(.65, 0, .35, 1);

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--void);
  color: var(--chalk);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: rgb(var(--glow) / .3); color: #fff; }

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

/* ---------------------------------------------------------------- texture */
/* grana sottile: da' materia alla superficie, evita il "piatto digitale" */
.grain {
  position: fixed; inset: -50%;
  pointer-events: none; z-index: 100;
  opacity: .035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 7s steps(6) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0) }
  20% { transform: translate(-3%,2%) }
  40% { transform: translate(2%,-3%) }
  60% { transform: translate(-2%,-2%) }
  80% { transform: translate(3%,1%) }
}

/* brace che segue il puntatore: calore appena percepibile */
.ember {
  position: fixed; z-index: 0; pointer-events: none;
  width: 46vmax; height: 46vmax;
  left: var(--mx, 50%); top: var(--my, 0%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgb(var(--glow) / .10), rgb(var(--glow) / .03) 42%, transparent 68%);
  opacity: 0; transition: opacity 1.2s var(--ease);
  filter: blur(28px);
}
body.pointer-live .ember { opacity: 1; }

/* ------------------------------------------------------------------- hero */
.hero {
  position: relative; z-index: 1;
  min-height: 100svh;
  display: grid; align-items: center;
  padding: 8vh 6vw 10vh;
  border-bottom: 1px solid var(--edge);
  /* bagliore della forgia dal basso */
  background:
    radial-gradient(120% 80% at 50% 118%, rgb(var(--glow) / .16), transparent 60%),
    linear-gradient(180deg, var(--void), var(--iron));
}
.hero-inner { max-width: 1180px; margin: 0 auto; width: 100%; }

.brand {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .3em;
  text-transform: uppercase; color: var(--ash);
  margin-bottom: clamp(2rem, 7vh, 4.5rem);
}
.mark {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--molten);
  box-shadow: 0 0 0 4px rgb(var(--glow) / .16), 0 0 20px 3px rgb(var(--glow) / .55);
  animation: pulse 3.4s var(--ease-io) infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; box-shadow: 0 0 0 4px rgb(var(--glow) / .16), 0 0 20px 3px rgb(var(--glow) / .55) }
  50% { opacity: .82; box-shadow: 0 0 0 7px rgb(var(--glow) / .07), 0 0 30px 5px rgb(var(--glow) / .3) }
}

.hero-title {
  margin: 0 0 1.6rem;
  font-size: clamp(2.8rem, 9.2vw, 8.2rem);
  line-height: .93;
  letter-spacing: -.045em;
  font-weight: 680;
}
.hero-title .l { display: block; overflow: hidden; }
.hero-title .l > * , .hero-title .l { will-change: transform; }
.hero-title em {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  letter-spacing: -.02em;
  background: linear-gradient(96deg, var(--amber), var(--molten));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  /* niente padding: la punteggiatura seguente resterebbe staccata */
  margin-right: -.04em;
}
/* le righe salgono in sequenza */
.hero-title .l { animation: rise 1.15s var(--ease) both; }
.hero-title .l:nth-child(1) { animation-delay: .06s }
.hero-title .l:nth-child(2) { animation-delay: .16s }
.hero-title .l:nth-child(3) { animation-delay: .26s }
@keyframes rise { from { transform: translateY(105%) } to { transform: translateY(0) } }

.hero-sub {
  max-width: 56ch; margin: 0 0 clamp(2.4rem, 6vh, 3.6rem);
  color: var(--ash); font-size: clamp(1rem, 1.35vw, 1.18rem);
  animation: fade 1s var(--ease) .5s both;
}
@keyframes fade { from { opacity: 0; transform: translateY(14px) } to { opacity: 1; transform: none } }

.stats {
  display: flex; flex-wrap: wrap; gap: clamp(1.8rem, 5vw, 4.5rem);
  margin: 0; padding-top: 2rem; border-top: 1px solid var(--edge);
  animation: fade 1s var(--ease) .64s both;
}
.stats dt {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .22em;
  text-transform: uppercase; color: var(--zinc); margin-bottom: .4rem;
}
.stats dd {
  margin: 0; font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 620; letter-spacing: -.035em; font-variant-numeric: tabular-nums;
}
.stats dd span { color: var(--zinc); font-size: .5em; font-weight: 400; letter-spacing: 0; }

.scroll-cue {
  display: block; width: 22px; height: 38px; margin-top: clamp(2.5rem, 7vh, 4rem);
  border: 1px solid var(--edge); border-radius: 12px; position: relative;
  animation: fade 1s var(--ease) .8s both;
}
.scroll-cue span {
  position: absolute; left: 50%; top: 8px; width: 3px; height: 7px; border-radius: 2px;
  background: var(--molten); transform: translateX(-50%);
  animation: cue 2s var(--ease-io) infinite;
}
@keyframes cue { 0% { opacity: 0; top: 7px } 35% { opacity: 1 } 100% { opacity: 0; top: 22px } }

/* ------------------------------------------------------------------ shelf */
.shelf { position: relative; z-index: 1; padding: clamp(4rem, 12vh, 8rem) 6vw clamp(3rem, 8vh, 5rem); max-width: 1400px; margin: 0 auto; }
.shelf-head {
  display: flex; flex-wrap: wrap; gap: 1.4rem 2rem;
  align-items: baseline; justify-content: space-between;
  margin-bottom: clamp(2rem, 5vh, 3.4rem);
}
.shelf-head h2 { margin: 0; font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.035em; font-weight: 640; }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  font: inherit; font-size: .78rem; cursor: pointer;
  padding: .42rem .95rem; border-radius: 100px;
  background: transparent; color: var(--ash);
  border: 1px solid var(--edge);
  transition: color .25s, border-color .25s, background .25s;
}
.chip:hover { color: var(--chalk); border-color: var(--zinc); }
.chip.is-on { background: var(--chalk); color: var(--void); border-color: var(--chalk); }

.grid {
  display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  background: var(--edge);
  border: 1px solid var(--edge);
}

.card {
  position: relative; isolation: isolate;
  display: flex; flex-direction: column; gap: .7rem;
  padding: clamp(1.6rem, 2.6vw, 2.3rem);
  background: var(--iron);
  min-height: 250px;
  transition: background .4s var(--ease), transform .4s var(--ease);
}
.card.will-reveal.in { transition: opacity .7s var(--ease) calc(var(--i) * 45ms), transform .7s var(--ease) calc(var(--i) * 45ms), background .4s; }
.card[hidden] { display: none; }
/* alone che segue il puntatore dentro la scheda */
.card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0;
  background: radial-gradient(340px circle at var(--cx, 50%) var(--cy, 50%), rgb(var(--glow) / .1), transparent 72%);
  transition: opacity .45s var(--ease);
}
.card:hover { background: var(--steel); }
.card:hover::before { opacity: 1; }
.card:focus-visible { outline: 2px solid var(--molten); outline-offset: -2px; }

.card-kicker {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .24em;
  text-transform: uppercase; color: var(--molten);
}
.card-title {
  margin: 0; font-size: clamp(1.24rem, 1.8vw, 1.55rem);
  letter-spacing: -.028em; line-height: 1.15; font-weight: 620;
}
.card-blurb { margin: 0; color: var(--ash); font-size: .93rem; line-height: 1.6; flex: 1; }
.card-foot {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 1rem; margin-top: .3rem; border-top: 1px solid var(--edge);
}
.card-foot em { font-family: var(--mono); font-style: normal; font-size: .7rem; letter-spacing: .1em; color: var(--zinc); }
.arrow { font-style: normal; color: var(--zinc); transition: transform .4s var(--ease), color .4s; }
.card:hover .arrow { transform: translate(4px, -4px); color: var(--molten); }

.foot {
  margin-top: clamp(3rem, 9vh, 6rem); padding-top: 2rem;
  border-top: 1px solid var(--edge);
  color: var(--zinc); font-size: .85rem; max-width: 62ch;
}
.foot p { margin: 0 0 .5rem; }
.foot-dim { font-family: var(--mono); font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; opacity: .6; }

/* --------------------------------------------------------------- documento */
.bar {
  position: sticky; top: 0; z-index: 30;
  height: var(--bar-h);
  display: flex; align-items: center; gap: 1.2rem;
  padding: 0 clamp(1rem, 4vw, 2.4rem);
  background: rgb(8 8 10 / .78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--edge);
}
.back { display: inline-flex; align-items: center; gap: .45rem; font-size: .85rem; color: var(--ash); transition: color .25s; }
.back:hover { color: var(--molten); }
.bar-title { font-size: .87rem; font-weight: 560; letter-spacing: -.012em; margin-left: auto; }
.bar-meta { font-family: var(--mono); font-size: .68rem; letter-spacing: .14em; color: var(--zinc); }

.reading { position: sticky; top: var(--bar-h); z-index: 29; height: 2px; background: transparent; }
.reading i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--amber), var(--molten)); }

.doc-wrap {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  max-width: 1320px; margin: 0 auto;
  padding: clamp(2.4rem, 6vh, 4.5rem) clamp(1.2rem, 5vw, 3rem) 6rem;
}
.toc { display: none; position: sticky; top: calc(var(--bar-h) + 2.4rem); align-self: start; max-height: calc(100svh - var(--bar-h) - 4rem); overflow-y: auto; }
.toc-head { font-family: var(--mono); font-size: .64rem; letter-spacing: .22em; text-transform: uppercase; color: var(--zinc); margin-bottom: 1rem; }
.toc nav { display: flex; flex-direction: column; border-left: 1px solid var(--edge); }
.toc a {
  padding: .4rem 0 .4rem 1rem; margin-left: -1px;
  border-left: 1px solid transparent;
  font-size: .84rem; line-height: 1.4; color: var(--zinc);
  transition: color .25s, border-color .25s;
}
.toc a:hover { color: var(--chalk); }
.toc a.is-here { color: var(--molten); border-left-color: var(--molten); }
.toc .toc-l3 { padding-left: 1.9rem; font-size: .79rem; }
.toc::-webkit-scrollbar { width: 3px }
.toc::-webkit-scrollbar-thumb { background: var(--edge) }

/* la barra laterale compare solo quando c'e' spazio: sotto, la prosa prende tutto */
@media (min-width: 1060px) {
  .doc-wrap { grid-template-columns: 250px minmax(0, 1fr); }
  .toc { display: block; }
}

/* ------------------------------------------------------------------- prosa */
.prose { max-width: var(--measure); min-width: 0; }
.eyebrow { font-family: var(--mono); font-size: .66rem; letter-spacing: .24em; text-transform: uppercase; color: var(--molten); margin: 0 0 1rem; }
.doc-h1 { margin: 0 0 1rem; font-size: clamp(2rem, 4.6vw, 3.3rem); line-height: 1.03; letter-spacing: -.042em; font-weight: 680; }
.lede { margin: 0; color: var(--ash); font-size: clamp(1rem, 1.3vw, 1.14rem); }
.rule { border: 0; border-top: 1px solid var(--edge); margin: clamp(2rem, 5vh, 3rem) 0; }

.prose h2 {
  margin: 3.2rem 0 1rem; font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  letter-spacing: -.032em; line-height: 1.2; font-weight: 640;
  scroll-margin-top: calc(var(--bar-h) + 1.5rem);
}
.prose h3 {
  margin: 2.3rem 0 .7rem; font-size: clamp(1.06rem, 1.7vw, 1.24rem);
  letter-spacing: -.022em; font-weight: 620; color: #dcdad5;
  scroll-margin-top: calc(var(--bar-h) + 1.5rem);
}
.prose h4 { margin: 1.8rem 0 .5rem; font-size: 1rem; font-weight: 620; color: var(--ash); }
.prose p { margin: 0 0 1.15rem; }
.prose strong { color: #fff; font-weight: 620; }
.prose em { font-family: var(--serif); font-style: italic; }
.prose ul, .prose ol { margin: 0 0 1.15rem; padding-left: 1.3rem; }
.prose li { margin-bottom: .42rem; }
.prose li::marker { color: var(--zinc); }
.prose a { color: var(--amber); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgb(var(--glow) / .4); transition: text-decoration-color .25s; }
.prose a:hover { text-decoration-color: var(--molten); }
.rule + hr { display: none; }
.prose hr { border: 0; border-top: 1px solid var(--edge); margin: 2.6rem 0; }

.prose blockquote {
  margin: 1.6rem 0; padding: 1.1rem 1.4rem;
  border-left: 2px solid var(--molten);
  background: linear-gradient(90deg, rgb(var(--glow) / .07), transparent 70%);
  color: var(--ash);
}
.prose blockquote p:last-child { margin-bottom: 0; }

.prose code {
  font-family: var(--mono); font-size: .845em;
  background: var(--steel); border: 1px solid var(--edge);
  padding: .12em .4em; border-radius: 4px; color: var(--amber);
}
.prose pre {
  margin: 1.5rem 0; padding: 1.15rem 1.3rem;
  background: #0b0b0f; border: 1px solid var(--edge); border-radius: 8px;
  overflow-x: auto; font-size: .84rem; line-height: 1.62;
  scrollbar-width: thin;
}
.prose pre code { background: none; border: 0; padding: 0; color: #cfd2d8; font-size: inherit; }
.prose pre::-webkit-scrollbar { height: 8px }
.prose pre::-webkit-scrollbar-thumb { background: var(--edge); border-radius: 4px }

/* token dell'evidenziatore */
.t-kw  { color: #ff8a4c; font-weight: 560; }
.t-ty  { color: #6fd3c7; }
.t-str { color: #b6d97a; }
.t-num { color: #f2c56b; }
.t-com { color: #5d6270; font-style: italic; }

/* tabelle: scorrono da sole, il corpo pagina non scorre mai in orizzontale */
.prose .table-scroll { overflow-x: auto; margin: 1.5rem 0; border: 1px solid var(--edge); border-radius: 8px; }
.prose table { border-collapse: collapse; width: 100%; font-size: .87rem; }
.prose thead th {
  position: sticky; top: 0;
  background: var(--shelf); text-align: left; font-weight: 600;
  padding: .7rem .9rem; border-bottom: 1px solid var(--edge);
  white-space: nowrap; font-size: .8rem; letter-spacing: .01em;
}
.prose tbody td { padding: .62rem .9rem; border-bottom: 1px solid rgb(42 42 52 / .6); vertical-align: top; }
.prose tbody tr:last-child td { border-bottom: 0; }
.prose tbody tr:nth-child(odd) { background: rgb(255 255 255 / .012); }
.prose tbody tr:hover { background: rgb(var(--glow) / .045); }
.prose td code { font-size: .8em; }

.pagers { display: grid; gap: 1px; grid-template-columns: 1fr; margin-top: 4rem; background: var(--edge); border: 1px solid var(--edge); }
@media (min-width: 680px) { .pagers { grid-template-columns: 1fr 1fr; } }
.pager { display: flex; flex-direction: column; gap: .3rem; padding: 1.2rem 1.4rem; background: var(--iron); transition: background .3s; }
.pager:hover { background: var(--steel); }
.pager em { font-family: var(--mono); font-style: normal; font-size: .64rem; letter-spacing: .2em; text-transform: uppercase; color: var(--zinc); }
.pager b { font-weight: 580; letter-spacing: -.02em; }
.pager.next { text-align: right; }

/* Rivelazione allo scroll.
   La classe la mette il JS, e SOLO sugli elementi che nascono sotto la piega:
   cosi' nulla puo' restare invisibile se lo script non gira o l'observer non scatta. */
.will-reveal { opacity: 0; transform: translateY(14px); }
.will-reveal.in { opacity: 1; transform: none; transition: opacity .55s var(--ease), transform .55s var(--ease); }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 6vh 6vw 8vh; }
  .stats { gap: 1.5rem 2.2rem; }
}