/* ==========================================================================================
   ai-hub.css — /servizi/progetti-automazioni-ai/ (hub AI). Movimento in pagine/ai-hub.js.
   Tutto è centrato e a tutta larghezza: niente testo a sinistra e oggetto a destra.
   eroe (volto in caratteri) · tunnel delle 5 soluzioni (pin) · anello dei 6 passaggi (pin) ·
   frase che si accende · chat in cornice · FAQ centrate.
   I pin si accendono da JS solo da 1024 px e senza movimento ridotto (classe .is-pin): senza,
   ogni blocco resta una sequenza leggibile in colonna.
   ========================================================================================== */

.pagina-ai3 { --ai-pausa: clamp(120px, 20vh, 240px); --ai-bordo: rgba(169, 139, 255, .28); }

/* parti comuni: testa centrata, titolo di sezione, lettere della decodifica */
.ai3-testa { display: grid; justify-items: center; gap: clamp(22px, 3.4vh, 40px); padding-inline: var(--margine); text-align: center; }
.ai3-titolo {
  margin: 0;
  font: 300 clamp(40px, min(6.2vw, 11.5svh), 116px)/.9 var(--font-display);
  letter-spacing: -.05em;
  text-transform: uppercase;
  color: var(--carta);
  text-wrap: balance;
}
.ai3-titolo .serif, .ai3-eroe__titolo .serif { text-transform: none; }
.ai3-testa__testo { margin: 0; max-width: 52ch; font: 300 clamp(17px, 1.25vw, 20px)/1.55 var(--font-voce); color: var(--carta-2); }
.ai3-parola { display: inline-block; white-space: nowrap; }
.ai3-l { display: inline-block; text-align: center; }

/* ---------------------------------------------------------------- 1. EROE ---------------- */
.ai3-eroe {
  position: relative;
  isolation: isolate;
  min-height: max(100svh, 680px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
  padding: calc(var(--testata-h) + 28px) var(--margine) calc(var(--hud-h) + clamp(28px, 5vh, 64px));
  overflow: hidden;
  text-align: center;
}
.ai3-eroe::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: radial-gradient(ellipse 46% 58% at 50% 38%, rgba(65, 37, 108, .55), rgba(35, 20, 61, .25) 55%, transparent 80%);
  pointer-events: none;
}
.ai3-eroe::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(to top, var(--nero) 0%, rgba(6, 5, 12, .72) 30%, rgba(6, 5, 12, 0) 62%);
  pointer-events: none;
}
.ai3-eroe__ritratto {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: min(100%, 108svh);
  margin-inline: auto;
  z-index: -1;
  transform-origin: 50% 38%;
  -webkit-mask-image: radial-gradient(ellipse 50% 60% at 50% 42%, #000 50%, transparent 100%);
  mask-image: radial-gradient(ellipse 50% 60% at 50% 42%, #000 50%, transparent 100%);
}
.ai3-eroe__foto { position: absolute; inset: 0; }
/* con il canvas acceso la foto si vede solo dentro la lente del cursore */
.ai3-eroe.is-caratteri .ai3-eroe__foto {
  -webkit-mask-image: radial-gradient(circle var(--lente, 0px) at var(--mx, 50%) var(--my, 50%), #000 55%, transparent 100%);
  mask-image: radial-gradient(circle var(--lente, 0px) at var(--mx, 50%) var(--my, 50%), #000 55%, transparent 100%);
}
.ai3-eroe__tela { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.ai3-eroe__briciole { justify-self: start; }
.ai3-eroe__titolo {
  align-self: end;
  margin: 0;
  font: 300 clamp(40px, min(8.2vw, 14svh), 156px)/.86 var(--font-display);
  letter-spacing: -.055em;
  text-transform: uppercase;
  color: var(--carta);
  text-shadow: 0 2px 50px rgba(6, 5, 12, .8);
}
.ai3-riga { display: block; white-space: nowrap; }
/* parola chiave dell'h1 sopra lo slogan (SEO: l'h1 dice cosa offre la pagina) */
.ai3-eroe__kicker {
  display: block;
  width: fit-content; /* non «table»: con table gli spazi fra le parole spezzate dal decodificatore spariscono */
  margin: 0 auto clamp(14px, 2.4vh, 26px);
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(6, 5, 12, .78);
  color: var(--viola-luce);
  letter-spacing: .14em;
  text-shadow: none;
}
.ai3-eroe__piede { display: grid; justify-items: center; gap: 26px; margin-top: clamp(28px, 5vh, 56px); }
.ai3-eroe__lead { margin: 0; max-width: 50ch; font: 300 clamp(17px, 1.3vw, 21px)/1.5 var(--font-voce); color: var(--carta); }
.ai3-eroe__azioni { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
@media (max-width: 819px) {
  .ai3-eroe__ritratto { width: 100%; opacity: .75; }
  .ai3-eroe__titolo { font-size: clamp(34px, 10.4vw, 64px); }
}
@media (max-width: 599px) {
  .ai3-riga { white-space: normal; }
}

/* ---------------------------------------------------------------- 2. TUNNEL -------------- */
.ai3-flussi { position: relative; padding-top: var(--ai-pausa); }
.ai3-tunnel { position: relative; margin-top: var(--aria); }
.ai3-tunnel__fondo, .ai3-tunnel__hud { display: none; }
.ai3-sol-elenco { list-style: none; margin: 0; padding: 0 var(--margine); display: grid; gap: clamp(96px, 14vh, 160px); }
.ai3-sol { position: relative; display: grid; justify-items: center; text-align: center; }
.ai3-sol__verbo {
  margin: 0 0 -.3em;
  padding: .04em .12em .16em;
  font: 300 italic clamp(56px, 18vw, 340px)/.8 var(--font-serif);
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(169, 139, 255, .6);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.ai3-sol__corpo { position: relative; width: 100%; display: grid; justify-items: center; gap: clamp(16px, 2.4svh, 28px); }
.ai3-sol__nome {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 6px 14px;
  font: 400 clamp(24px, 2.2vw, 38px)/1.1 var(--font-display);
  letter-spacing: -.02em;
  color: var(--carta);
  text-wrap: balance;
}
.ai3-sol__num { font: 500 13px/1 var(--font-mono); letter-spacing: .06em; color: var(--viola-luce); }
.ai3-sol__tipo { margin: -6px 0 0; font: 500 12px/1.3 var(--font-mono); letter-spacing: .07em; text-transform: uppercase; color: var(--carta-2); }

/* la capsula: in colonna ingresso e uscita; nel tunnel l'uscita prende il posto dell'ingresso */
.ai3-capsula {
  position: relative;
  width: min(100%, 800px);
  display: grid;
  gap: 10px;
  padding: 16px 22px;
  border-radius: 14px;
  background: rgba(13, 10, 26, .82);
  box-shadow: 0 0 0 1px var(--ai-bordo), 0 0 70px -16px rgba(121, 64, 224, .55), inset 0 1px 0 rgba(255, 255, 255, .05);
  text-align: left;
}
.ai3-capsula__voce { margin: 0; display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 14px; align-items: baseline; font: 400 15px/1.45 var(--font-sans); color: var(--carta); }
.ai3-capsula__chiave { font: 500 11px/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--viola-luce); }
.ai3-capsula__voce--out .ai3-capsula__chiave { color: var(--neon); }

/* il binario: in colonna sotto 1024 px, orizzontale nel tunnel */
.ai3-binario { position: relative; width: min(100%, 800px); text-align: left; }
.ai3-binario__filo { position: absolute; left: 7px; top: 10px; bottom: 10px; width: 1px; background: var(--linea-forte); }
.ai3-binario__filo i { position: absolute; inset: 0; background: linear-gradient(var(--viola-luce), var(--neon)); transform: scaleY(var(--p, 1)); transform-origin: 50% 0; }
.ai3-binario__filo b { display: none; }
.ai3-binario__nodi { list-style: none; margin: 0; padding: 0; display: grid; gap: 22px; }
.ai3-nodo { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: baseline; gap: 4px 12px; padding-left: 32px; transition: opacity .6s; }
.ai3-nodo__punto {
  position: absolute;
  left: 0;
  top: 2px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--nero);
  box-shadow: inset 0 0 0 1px var(--viola-luce);
  transition: background-color .4s, box-shadow .4s, transform .5s var(--curva-expo);
}
.ai3-nodo__num { font: 500 12px/1 var(--font-mono); color: var(--carta-2); }
.ai3-nodo__nome { font: 500 16px/1.25 var(--font-sans); color: var(--carta); }
.ai3-nodo__esito { grid-column: 1 / -1; font: 400 14px/1.45 var(--font-sans); color: var(--carta-2); }
.ai3-nodo--umano .ai3-nodo__punto { background: rgba(206, 105, 227, .3); box-shadow: inset 0 0 0 1px var(--neon), 0 0 16px var(--neon); }
.ai3-nodo--umano .ai3-nodo__num { color: var(--neon); }
.ai3-nodo__decidi { grid-column: 1 / -1; position: relative; display: flex; margin-top: 8px; }
.ai3-approva {
  position: relative;
  display: inline-grid;
  padding: 9px 18px;
  border-radius: 999px;
  font: 500 13px/1 var(--font-sans);
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--carta);
  background: var(--viola);
  transition: background-color .35s, transform .2s, box-shadow .6s;
}
.ai3-approva > span { grid-area: 1 / 1; transition: opacity .3s, transform .3s; }
.ai3-approva__fatto { opacity: 0; transform: translateY(6px); }
.ai3-approva__fatto::before { content: "✓ "; }
.ai3-mano { display: none; }
/* sotto 1024 px le fasi si accendono quando entrano (classe da ai-hub.js) */
.ai3-flussi.is-scorre .ai3-nodo:not(.is-fatta) { opacity: .4; }
.ai3-flussi.is-scorre .ai3-nodo.is-fatta .ai3-nodo__punto { background: var(--viola-luce); transform: scale(1.1); }
.ai3-flussi.is-scorre .ai3-binario__filo i { transition: transform 1.2s var(--curva-expo); }

.ai3-sol__piede { display: grid; justify-items: center; gap: 14px; }
.ai3-sol__descr { margin: 0; max-width: 58ch; color: var(--carta-2); font-size: clamp(16px, 1.15vw, 18px); line-height: 1.5; }
.ai3-sol__umano { margin: 0; display: inline-flex; align-items: center; gap: 10px; font: 500 14px/1.3 var(--font-sans); color: var(--carta); }
.ai3-sol__umano i { width: 9px; height: 9px; border-radius: 50%; background: var(--neon); box-shadow: 0 0 12px var(--neon); }
.ai3-nota { margin: clamp(40px, 6vh, 64px) var(--margine) 0; text-align: center; font: 400 13px/1.4 var(--font-sans); color: var(--carta-2); }
@keyframes ai3-pulsa { 0% { box-shadow: 0 0 0 0 rgba(206, 105, 227, .55); } 70%, 100% { box-shadow: 0 0 0 16px rgba(206, 105, 227, 0); } }

@media (min-width: 1024px) {
  /* il tunnel: una scena a tutto schermo, una soluzione alla volta, tutto al centro */
  .ai3-flussi.is-pin .ai3-tunnel { height: 100svh; overflow: hidden; }
  .ai3-flussi.is-pin .ai3-tunnel__fondo { display: block; position: absolute; inset: 0; pointer-events: none; }
  .ai3-tunnel__fondo::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 70% at 50% 50%, transparent 35%, rgba(6, 5, 12, .85) 85%, var(--nero));
  }
  .ai3-tunnel__raggi { position: absolute; inset: 0; width: 100%; height: 100%; }
  .ai3-tunnel__raggi line { stroke: rgba(169, 139, 255, .13); stroke-width: 1; vector-effect: non-scaling-stroke; stroke-dasharray: 1; stroke-dashoffset: var(--disegna, 1); }
  .ai3-tunnel__anelli i {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 90%;
    height: 82%;
    border: 1px solid rgba(169, 139, 255, .7);
    border-radius: 32px;
    box-shadow: 0 0 24px -6px rgba(121, 64, 224, .6), inset 0 0 24px -8px rgba(121, 64, 224, .5);
    opacity: 0;
    will-change: transform, opacity;
  }
  .ai3-tunnel__anelli i:nth-child(3n) { border-color: rgba(206, 105, 227, .5); }
  .ai3-tunnel__cuore {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 56vmin;
    height: 56vmin;
    translate: -50% -50%;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgba(169, 139, 255, .3), rgba(121, 64, 224, .12) 45%, transparent);
  }
  .ai3-flussi.is-pin .ai3-tunnel__hud {
    display: flex;
    align-items: center;
    gap: 20px;
    position: absolute;
    z-index: 3;
    left: 50%;
    bottom: calc(var(--hud-h) + 18px);
    translate: -50% 0;
    font: 500 13px/1 var(--font-mono);
    letter-spacing: .06em;
    color: var(--carta-2);
  }
  .ai3-tunnel__conta b { color: var(--carta); font-weight: 500; font-variant-numeric: tabular-nums; }
  .ai3-tunnel__tacche { display: flex; gap: 6px; }
  .ai3-tunnel__tacche i { position: relative; width: 48px; height: 2px; background: var(--linea-forte); overflow: hidden; }
  .ai3-tunnel__tacche b { position: absolute; inset: 0; background: var(--viola-luce); transform: scaleX(var(--p, 0)); transform-origin: 0 50%; }

  .ai3-flussi.is-pin .ai3-sol-elenco { position: absolute; inset: 0; display: block; padding: 0; }
  .ai3-flussi.is-pin .ai3-sol {
    position: absolute;
    inset: 0;
    align-content: center;
    padding: calc(var(--testata-h) + 20px) var(--margine) calc(var(--hud-h) + 56px);
    visibility: hidden;
  }
  .ai3-flussi.is-pin .ai3-sol.is-attiva { visibility: visible; }
  .ai3-flussi.is-pin .ai3-sol__verbo {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    margin: 0;
    translate: 0 -58%;
    font-size: min(23vw, 42svh);
    -webkit-text-stroke: 1.5px rgba(169, 139, 255, .85);
    opacity: 0;
    will-change: transform, opacity, filter;
  }
  .ai3-flussi.is-pin .ai3-sol__corpo { opacity: 0; will-change: transform, opacity; }

  /* capsula: ingresso e uscita nella stessa cella, l'uscita arriva alla fine */
  .ai3-flussi.is-pin .ai3-capsula { grid-template-areas: "v"; }
  .ai3-flussi.is-pin .ai3-capsula__voce { grid-area: v; transition: opacity .45s, transform .6s var(--curva-expo), filter .45s; }
  .ai3-flussi.is-pin .ai3-capsula__voce--in .ai3-capsula__testo { clip-path: inset(0 100% 0 0); transition: clip-path 1s steps(36, end); }
  .ai3-flussi.is-pin .ai3-capsula.is-in .ai3-capsula__voce--in .ai3-capsula__testo { clip-path: inset(0 0 0 0); }
  .ai3-flussi.is-pin .ai3-capsula__voce--out { opacity: 0; transform: translateY(10px); filter: blur(6px); }
  .ai3-flussi.is-pin .ai3-capsula.is-out .ai3-capsula__voce--in { opacity: 0; transform: translateY(-10px); filter: blur(6px); }
  .ai3-flussi.is-pin .ai3-capsula.is-out .ai3-capsula__voce--out { opacity: 1; transform: none; filter: none; }
  .ai3-flussi.is-pin .ai3-capsula.is-out { box-shadow: 0 0 0 1px rgba(206, 105, 227, .55), 0 0 90px -12px rgba(206, 105, 227, .5), inset 0 1px 0 rgba(255, 255, 255, .05); }

  /* binario orizzontale: l'impulso corre sul filo e accende le fasi */
  .ai3-flussi.is-pin .ai3-binario { width: 100%; max-width: 1400px; margin-top: 6px; }
  .ai3-flussi.is-pin .ai3-binario__filo {
    left: 0;
    right: 0;
    top: 7px;
    bottom: auto;
    width: auto;
    height: 1px;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  }
  .ai3-flussi.is-pin .ai3-binario__filo i { background: linear-gradient(90deg, var(--viola), var(--viola-luce) 60%, var(--neon)); transform: scaleX(var(--p, 0)); transform-origin: 0 50%; box-shadow: 0 0 12px var(--viola-luce); }
  /* l'impulso: uno strato largo quanto il filo che trasla (transform, niente spostamenti di layout) */
  .ai3-flussi.is-pin .ai3-binario__filo b { display: block; position: absolute; left: 0; top: -6px; width: 100%; height: 13px; transform: translateX(calc(var(--p, 0) * 100%)); }
  .ai3-flussi.is-pin .ai3-binario__filo b::before {
    content: "";
    position: absolute;
    left: -6.5px;
    top: 0;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--carta);
    box-shadow: 0 0 0 4px rgba(169, 139, 255, .25), 0 0 28px 6px var(--viola-luce);
  }
  .ai3-flussi.is-pin .ai3-binario__nodi { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0 clamp(16px, 2vw, 36px); }
  .ai3-flussi.is-pin .ai3-nodo { grid-template-columns: none; justify-items: center; align-content: start; text-align: center; gap: 8px; padding: 32px 0 0; opacity: .42; }
  .ai3-flussi.is-pin .ai3-nodo__punto { left: 50%; top: 0; margin-left: -7.5px; }
  .ai3-flussi.is-pin .ai3-nodo__esito { opacity: 0; filter: blur(6px); transform: translateY(8px); transition: opacity .5s, filter .6s, transform .7s var(--curva-expo); }
  .ai3-flussi.is-pin .ai3-nodo.is-fatta { opacity: 1; }
  .ai3-flussi.is-pin .ai3-nodo.is-fatta .ai3-nodo__punto { background: var(--viola-luce); transform: scale(1.15); box-shadow: inset 0 0 0 1px var(--viola-luce), 0 0 18px var(--viola-luce); }
  .ai3-flussi.is-pin .ai3-nodo.is-fatta .ai3-nodo__esito { opacity: 1; filter: none; transform: none; }
  .ai3-flussi.is-pin .ai3-nodo__decidi { justify-content: center; opacity: 0; transform: translateY(8px); transition: opacity .4s, transform .5s var(--curva-expo); }
  .ai3-flussi.is-pin .ai3-nodo--umano { opacity: .7; }
  .ai3-flussi.is-pin .ai3-nodo--umano .ai3-nodo__punto { background: rgba(206, 105, 227, .3); transform: scale(1.15); box-shadow: inset 0 0 0 1px var(--neon), 0 0 18px var(--neon); }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-attesa .ai3-nodo__punto { animation: ai3-pulsa 1.2s ease-out infinite; }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-attesa .ai3-nodo__decidi,
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-nodo__decidi { opacity: 1; transform: none; }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-attesa .ai3-approva { animation: ai3-pulsa 1.4s ease-out infinite; }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-nodo__punto { background: var(--neon); }
  .ai3-flussi.is-pin .ai3-mano {
    display: block;
    position: absolute;
    left: calc(50% + 70px);
    top: 30px;
    width: 22px;
    height: 22px;
    background: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M4 2l15 9.5-6.6 1.3L16 20l-3 1.4-3.6-7.2L4 18.7z' fill='%23efe9e1' stroke='%2306050c' stroke-width='1.2' stroke-linejoin='round'/%3E%3C/svg%3E");
    opacity: 0;
    transition: transform .9s var(--curva-expo), opacity .3s;
  }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-attesa .ai3-mano { opacity: 1; transform: translate(-70px, -14px); }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-mano { opacity: 0; transform: translate(-70px, -14px) scale(.85); }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-approva { animation: none; background: rgba(169, 139, 255, .16); box-shadow: inset 0 0 0 1px var(--viola-luce); transform: scale(.97); }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-approva__testo { opacity: 0; transform: translateY(-6px); }
  .ai3-flussi.is-pin .ai3-nodo--umano.is-approvata .ai3-approva__fatto { opacity: 1; transform: none; }

  .ai3-flussi.is-pin .ai3-sol__piede { grid-template-columns: auto auto; justify-content: center; align-items: center; column-gap: 32px; row-gap: 10px; margin-top: 4px; }
  .ai3-flussi.is-pin .ai3-sol__descr { grid-column: 1 / -1; }
  .ai3-flussi.is-pin .ai3-nota { margin-top: 0; padding-top: 24px; }
  .ai3-flussi.is-pin .ai3-sol__corpo { gap: clamp(16px, 3svh, 36px); }
  .ai3-flussi.is-pin .ai3-capsula__voce { font-size: clamp(15px, 1.15vw, 17px); }
  .ai3-flussi.is-pin .ai3-nodo__nome { font-size: clamp(16px, 1.3vw, 20px); }
  .ai3-flussi.is-pin .ai3-nodo__esito { font-size: clamp(14px, 1.05vw, 16px); }
}

/* ---------------------------------------------------------------- 3. ANELLO -------------- */
/* dietro l'anello c'è il cielo a nebulose della home (cielo.js: canvas fisso, acceso dalla zona
   [data-cielo]); le sezioni sono trasparenti, il contenuto sta sopra il canvas */
.cielo { position: fixed; left: 0; top: 0; z-index: 0; display: block; pointer-events: none; opacity: 0; visibility: hidden; transition: opacity .5s linear, visibility 0s linear .5s; }
.cielo.is-acceso { opacity: 1; visibility: visible; transition: opacity .5s linear, visibility 0s; }
.pagina-ai3 .contenuto { position: relative; z-index: 1; }
.ai3-anello__intro { color: var(--carta); text-shadow: 0 1px 24px rgba(6, 5, 12, .9); }
.ai3-anello { position: relative; padding-top: var(--ai-pausa); }
.ai3-anello__scena { position: relative; margin-top: var(--aria); padding-inline: var(--margine); }
.ai3-anello__orbita, .ai3-anello__nucleo, .ai3-anello__gocce { display: none; }
.ai3-anello__passi { list-style: none; margin: 0 auto; padding: 0; max-width: 760px; display: grid; gap: clamp(48px, 7vh, 72px); }
.ai3-passo { display: grid; justify-items: center; gap: 16px; text-align: center; }
.ai3-passo__segno {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--carta-2);
  background: rgba(13, 10, 26, .9);
  box-shadow: inset 0 0 0 1px rgba(169, 139, 255, .35);
  white-space: nowrap;
}
.ai3-passo__segno b { font-weight: 500; color: var(--viola-luce); }
.ai3-passo__testo { display: grid; justify-items: center; gap: 14px; }
.ai3-passo__nodo { margin: 0; font: 300 italic clamp(48px, 6vw, 112px)/.92 var(--font-serif); letter-spacing: -.045em; color: var(--carta); }
.ai3-passo__titolo { margin: 0; max-width: 34ch; font: 400 clamp(19px, 1.55vw, 25px)/1.3 var(--font-voce); color: var(--carta); }
.ai3-passo__corpo { margin: 0; max-width: 54ch; font-size: clamp(16px, 1.1vw, 17px); line-height: 1.6; color: var(--carta-2); }

@media (min-width: 1024px) {
  .ai3-anello.is-pin .ai3-anello__palco {
    height: 100svh;
    display: flex;
    flex-direction: column;
    padding-top: calc(var(--testata-h) + clamp(12px, 3svh, 40px));
    overflow: hidden;
  }
  .ai3-anello.is-pin .ai3-titolo { font-size: clamp(36px, min(4.4vw, 8svh), 80px); }
  .ai3-anello.is-pin .ai3-anello__testa { gap: clamp(10px, 1.8svh, 20px); }
  .ai3-anello.is-pin .ai3-anello__intro { max-width: 64ch; font-size: clamp(16px, 1.15vw, 18px); }
  .ai3-anello.is-pin .ai3-anello__scena { flex: 1; margin: 0; padding: 0; }
  .ai3-anello.is-pin .ai3-anello__orbita { display: block; position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
  .ai3-anello__ellisse { fill: none; stroke: rgba(169, 139, 255, .45); stroke-width: 1; stroke-dasharray: 1; stroke-dashoffset: var(--disegna, 0); }
  .ai3-anello__arco { fill: none; stroke: var(--viola-luce); stroke-width: 2; stroke-linecap: round; stroke-dasharray: .12 .88; stroke-dashoffset: -.19; filter: drop-shadow(0 0 6px var(--viola-luce)); opacity: var(--arco, 0); }
  .ai3-anello.is-pin .ai3-anello__nucleo {
    display: block;
    position: absolute;
    left: 50%;
    top: var(--ty, 44%);
    width: min(1100px, 84vw);
    height: 62svh;
    translate: -50% -50%;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgba(6, 5, 12, .82) 32%, rgba(6, 5, 12, .4) 62%, transparent);
    pointer-events: none;
  }
  .ai3-anello.is-pin .ai3-anello__gocce { display: block; position: absolute; inset: 0; pointer-events: none; }
  .ai3-anello__gocce i { position: absolute; left: 0; top: 0; width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%; background: var(--carta); box-shadow: 0 0 12px 3px var(--viola-luce); will-change: transform, opacity; }
  .ai3-anello.is-pin .ai3-anello__passi { position: absolute; inset: 0; max-width: none; display: block; }
  .ai3-anello.is-pin .ai3-passo__segno { position: absolute; left: 0; top: 0; will-change: transform, opacity; transition: box-shadow .4s, color .4s; }
  .ai3-anello.is-pin .ai3-passo.is-attiva .ai3-passo__segno { color: var(--carta); box-shadow: inset 0 0 0 1px var(--viola-luce), 0 0 34px -4px var(--viola-luce); }
  .ai3-anello.is-pin .ai3-passo__testo {
    position: absolute;
    left: 50%;
    top: var(--ty, 44%);
    width: min(780px, 68vw);
    translate: -50% -50%;
    opacity: 0;
    filter: blur(10px);
    transform: translateY(24px) scale(.97);
    transition: opacity .45s, filter .55s, transform .9s var(--curva-expo);
    pointer-events: none;
    z-index: 20;
  }
  .ai3-anello.is-pin .ai3-passo.is-attiva .ai3-passo__testo { opacity: 1; filter: none; transform: none; transition-delay: .1s; pointer-events: auto; }
}

/* ---------------------------------------------------------------- 4. FRASE --------------- */
.ai3-frase { display: grid; justify-items: center; gap: clamp(40px, 7vh, 80px); padding: var(--ai-pausa) var(--margine); text-align: center; }
.ai3-frase__testo {
  margin: 0;
  max-width: min(100%, 1240px);
  font: 300 clamp(30px, min(4.7vw, 9svh), 86px)/1.06 var(--font-display);
  letter-spacing: -.035em;
  color: var(--carta);
  text-wrap: balance;
}
.ai3-frase__luce { font-family: var(--font-serif); font-style: italic; color: var(--viola-luce); }
.ai3-frase__prosa { margin: 0; max-width: 58ch; color: var(--carta-2); font-size: clamp(16px, 1.15vw, 18px); line-height: 1.6; }
.ai3-frase__prosa a { color: var(--carta); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .2em; }
.ai3-w { display: inline; }

/* ---------------------------------------------------------------- 5. CHAT ---------------- */
.ai3-chat { position: relative; overflow-x: clip; display: grid; justify-items: center; gap: var(--aria); padding: var(--ai-pausa) var(--margine); }
/* stessa altezza della chat montata (come servizi-ai.css): niente salto quando l'isola arriva */
.ai3-chat .sv-chat { min-height: 650px; }
@media (min-width: 820px) { .ai3-chat .sv-chat { min-height: 667px; } }
.ai3-chat .ai3-titolo { font-size: clamp(36px, min(4.8vw, 9svh), 88px); }
.ai3-chat__cornice { position: relative; isolation: isolate; width: min(100%, 940px); padding: clamp(10px, 1.4vw, 20px); }
.ai3-chat__cornice::before {
  content: "";
  position: absolute;
  inset: -8% -14%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(121, 64, 224, .32), rgba(65, 37, 108, .14) 55%, transparent);
  pointer-events: none;
}
.ai3-chat__angoli i { position: absolute; width: 24px; height: 24px; border: 0 solid var(--viola-luce); }
.ai3-chat__angoli i:nth-child(1) { left: 0; top: 0; border-width: 1px 0 0 1px; }
.ai3-chat__angoli i:nth-child(2) { right: 0; top: 0; border-width: 1px 1px 0 0; }
.ai3-chat__angoli i:nth-child(3) { left: 0; bottom: 0; border-width: 0 0 1px 1px; }
.ai3-chat__angoli i:nth-child(4) { right: 0; bottom: 0; border-width: 0 1px 1px 0; }
.ai3-chat__regole { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 32px; max-width: 1100px; }
.ai3-chat__regole li { display: flex; align-items: baseline; gap: 10px; color: var(--carta-2); font-size: 15px; line-height: 1.45; }
.ai3-chat__regole li::before { content: ""; flex: 0 0 7px; height: 7px; border-radius: 50%; background: var(--viola-luce); transform: translateY(-2px); }

/* ---------------------------------------------------------------- FAQ centrate ----------- */
.pagina-ai3 .sv-faq .griglia { display: block; max-width: 920px; margin-inline: auto; }
.pagina-ai3 .sv-faq .sv-testa { position: static; justify-items: center; text-align: center; margin-bottom: var(--aria); }

/* aria in fondo ai blocchi: l'onda di fuoco (onde.js) deve passare sul vuoto, non sui testi */
.ai3-flussi, .ai3-anello { padding-bottom: var(--ai-pausa); }