/* NEURIAM — restyle 3D v1 (02/11/2026)
   Palette dal logo: inchiostro #EEF0F8, ardesia #2B3340, glow blu #3D5BFF */

@font-face { font-family: "Space Grotesk"; src: url("/assets/3d/fonts/space-grotesk-latin-wght-normal.woff2") format("woff2"); font-weight: 300 700; font-display: swap; }
@font-face { font-family: "Inter"; src: url("/assets/3d/fonts/inter-latin-wght-normal.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/assets/3d/fonts/jetbrains-mono-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --bg: #0A0E18;
  --bg-2: #111827;
  --slate: #2B3340;
  --surface: rgba(17, 23, 38, 0.72);
  --surface-solid: #121A2B;
  --line: rgba(238, 240, 248, 0.10);
  --line-strong: rgba(238, 240, 248, 0.22);
  --ink: #EEF0F8;
  --ink-2: #B7BED0;          /* 9.6:1 su --bg */
  --ink-3: #8E97AD;          /* 6.1:1 su --bg */
  --glow: #3D5BFF;
  --accent: #6F86FF;         /* testo/link accent: 5.9:1 su --bg */
  --accent-2: #8FE3FF;
  --focus: #9FB0FF;
  --radius: 18px;
  --radius-sm: 12px;
  --f-head: "Space Grotesk", system-ui, sans-serif;
  --f-body: "Inter", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(.22, .8, .24, 1);
  --gutter: clamp(16px, 4vw, 56px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 100; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-weight: 600; text-decoration: none; }
.skip:focus { top: 12px; }

/* ---------- Scena ---------- */
#scene { position: fixed; inset: 0; width: 100vw; height: 100vh; height: 100lvh; z-index: 0; display: block; }
.vignette { position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% 40%, transparent 55%, rgba(5,7,13,.65) 100%),
    linear-gradient(180deg, rgba(10,14,24,.55) 0%, transparent 18%, transparent 82%, rgba(10,14,24,.7) 100%); }
.scene-fallback { display: none; }
.no-webgl #scene { display: none; }
.no-webgl .scene-fallback { display: grid; place-items: center; position: fixed; inset: 0; z-index: 0;
  background: radial-gradient(60% 50% at 70% 40%, rgba(61,91,255,.28), transparent 70%), var(--bg); }
.no-webgl .scene-fallback img { width: min(38vw, 340px); opacity: .18; filter: drop-shadow(0 0 30px rgba(61,91,255,.8)); }

/* ---------- Barra anteprima + nav ---------- */
.preview-bar { position: relative; z-index: 20; display: flex; gap: 10px; align-items: center; justify-content: center; flex-wrap: wrap;
  padding: 8px var(--gutter); font: 500 12px/1.4 var(--f-mono); letter-spacing: .04em; color: var(--ink-2);
  background: rgba(43,51,64,.55); border-bottom: 1px solid var(--line); }
.preview-bar .dot { width: 7px; height: 7px; border-radius: 50%; background: #FFB547; box-shadow: 0 0 10px #FFB547; }
.preview-bar .ver { color: var(--ink-3); }

.nav { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 24px;
  padding: 14px var(--gutter); background: rgba(10,14,24,.55); backdrop-filter: blur(16px) saturate(140%); -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line); }
.brand img { height: 20px; width: auto; filter: drop-shadow(0 0 8px rgba(61,91,255,.55)); }
.nav nav { margin-left: auto; }
.nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border-radius: 10px; text-decoration: none; color: var(--ink-2); font-weight: 500; font-size: 15px; transition: color .2s, background .2s; }
.nav nav a:hover { color: var(--ink); background: rgba(238,240,248,.06); }
@media (max-width: 860px) { .nav nav { display: none; } .nav .btn { margin-left: auto; } }

/* ---------- Bottoni ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px;
  font: 600 15px/1 var(--f-body); text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .2s, border-color .2s; }
.btn-sm { min-height: 44px; padding: 0 18px; font-size: 14px; }
.btn-primary { background: var(--ink); color: #0A0E18; box-shadow: 0 0 0 0 rgba(61,91,255,0), 0 6px 24px rgba(61,91,255,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 4px rgba(61,91,255,.25), 0 10px 34px rgba(61,91,255,.55); }
.btn-ghost { color: var(--ink); border-color: var(--line-strong); background: rgba(238,240,248,.03); }
.btn-ghost:hover { border-color: var(--accent); background: rgba(61,91,255,.12); }
.btn:active { transform: translateY(0) scale(.98); }

/* ---------- Rail esagoni ---------- */
.rail { position: fixed; right: max(14px, calc(var(--gutter) / 2)); top: 50%; transform: translateY(-50%); z-index: 25;
  list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.rail li { width: 10px; height: 11px; background: var(--line-strong);
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%); transition: background .3s, transform .3s var(--ease); }
.rail li.on { background: var(--ink); transform: scale(1.45); filter: drop-shadow(0 0 6px var(--glow)); }
@media (max-width: 860px) { .rail { display: none; } }

/* ---------- Sezioni ---------- */
main { position: relative; z-index: 10; }
.stage { min-height: 100vh; padding: clamp(96px, 14vh, 160px) var(--gutter); display: flex; flex-direction: column; justify-content: center; gap: 40px; }
.stage-tall { min-height: 130vh; }
.stage[data-side="left"] { align-items: flex-start; }
.stage[data-side="right"] { align-items: flex-end; }
.stage[data-side="center"] { align-items: center; text-align: center; }

.panel { width: min(560px, 100%); padding: clamp(24px, 3vw, 40px); border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line); backdrop-filter: blur(18px) saturate(130%); -webkit-backdrop-filter: blur(18px) saturate(130%);
  box-shadow: 0 30px 80px rgba(0,0,0,.35); }
.panel-bare { background: none; border: 0; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none; padding-left: 0; padding-right: 0; }
.panel-wide { width: min(760px, 100%); }
.panel-center { width: min(680px, 100%); }

.eyebrow { margin: 0 0 18px; font: 500 12.5px/1.4 var(--f-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--accent-2); display: flex; align-items: center; gap: 12px; }
.stage[data-side="center"] .eyebrow { justify-content: center; }
.eyebrow .num { color: var(--ink); padding: 3px 8px; border: 1px solid var(--line-strong); border-radius: 6px; letter-spacing: .06em; }

h1, h2, h3 { font-family: var(--f-head); font-weight: 600; letter-spacing: -.02em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(42px, 6.4vw, 92px); line-height: .98; font-weight: 700; letter-spacing: -.035em; }
h1 em, h2 em { font-style: normal; background: linear-gradient(100deg, #FFFFFF 0%, #A9B8FF 45%, var(--accent-2) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; filter: drop-shadow(0 0 22px rgba(61,91,255,.45)); }
h2 { font-size: clamp(32px, 4.2vw, 56px); line-height: 1.04; }
h3 { font-size: 21px; line-height: 1.25; letter-spacing: -.01em; }
.hero .panel { width: min(720px, 100%); }
.lead { font-size: clamp(17px, 1.4vw, 20px); color: var(--ink-2); margin: 22px 0 0; max-width: 58ch; text-wrap: pretty; }
p { text-wrap: pretty; }
.panel p { color: var(--ink-2); }
.note { font-size: 14px; color: var(--ink-3) !important; }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.cta-center { justify-content: center; }

/* Hero */
.hero { justify-content: flex-end; padding-bottom: 72px; min-height: calc(100vh - 110px); }
.hero .panel { margin-top: auto; }
.proof-strip { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; width: 100%;
  border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; background: var(--line);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.proof-strip li { background: rgba(10,14,24,.62); padding: 16px 18px; font-size: 14.5px; color: var(--ink); line-height: 1.35; }
.proof-strip .k { display: block; font: 500 11px/1.3 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 6px; }
@media (max-width: 760px) { .proof-strip { grid-template-columns: 1fr 1fr; } }
.scroll-hint { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); margin: 0; font: 500 11px/1 var(--f-mono); letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); display: grid; justify-items: center; gap: 8px; }
.scroll-hint span { width: 1px; height: 28px; background: linear-gradient(var(--ink), transparent); animation: drip 2.2s var(--ease) infinite; }
@keyframes drip { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }
.hero { position: relative; }

/* Card */
.cards { display: grid; gap: 16px; width: 100%; }
.cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 1180px; }
.cards-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 980px; }
@media (max-width: 980px) { .cards-3, .cards-2 { grid-template-columns: 1fr; max-width: 620px; } }
.card { position: relative; padding: 28px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(18px) saturate(130%); -webkit-backdrop-filter: blur(18px) saturate(130%);
  display: flex; flex-direction: column; gap: 12px; transition: border-color .3s, transform .4s var(--ease), box-shadow .4s var(--ease); overflow: hidden; }
.card::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .4s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(61,91,255,.22), transparent 60%); }
.card:hover, .card:focus-within { border-color: rgba(111,134,255,.55); transform: translateY(-4px); box-shadow: 0 24px 60px rgba(61,91,255,.18); }
.card:hover::before, .card:focus-within::before { opacity: 1; }
.card p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.card .tag { font: 500 11.5px/1 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent-2); }
.link { margin-top: auto; padding-top: 8px; display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--ink); font-weight: 600; text-decoration: none; }
.link span { transition: transform .3s var(--ease); }
.link:hover span { transform: translateX(4px); }
.link:hover { color: #fff; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 5px; }

/* Steps */
.steps { list-style: none; margin: 30px 0 0; padding: 0; display: grid; gap: 4px; counter-reset: s; }
.steps li { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); }
.step-n { font: 500 13px/1 var(--f-mono); color: var(--ink); width: 44px; height: 48px; display: grid; place-items: center;
  background: rgba(61,91,255,.16); clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%); }
.steps p { margin: 6px 0 0; font-size: 15.5px; }

/* Disclosure */
.disclosure summary, .faq summary { cursor: pointer; list-style: none; }
.disclosure summary::-webkit-details-marker, .faq summary::-webkit-details-marker { display: none; }
.disclosure summary { display: inline-flex; align-items: center; min-height: 44px; gap: 10px; font-weight: 600; color: var(--ink); }
.disclosure summary::after { content: "+"; font: 500 18px/1 var(--f-mono); color: var(--accent); transition: transform .3s var(--ease); }
.disclosure[open] summary::after { transform: rotate(45deg); }
.mini-steps { margin: 6px 0 10px; padding-left: 22px; color: var(--ink-2); font-size: 15px; display: grid; gap: 4px; }

/* Layers risultati */
.layers { margin: 26px 0; display: grid; gap: 2px; }
.layers > div { display: grid; grid-template-columns: 130px 1fr; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); }
.layers dt { font: 600 15px/1.3 var(--f-head); display: flex; align-items: center; gap: 10px; }
.layers dd { margin: 0; color: var(--ink-2); font-size: 15px; }
.sw { width: 10px; height: 11px; flex: none; clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%); }
.sw0 { background: #5B6378; } .sw1 { background: var(--accent); } .sw2 { background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2); } .sw3 { background: var(--ink); }
@media (max-width: 560px) { .layers > div { grid-template-columns: 1fr; gap: 4px; } }
.pull { margin: 22px 0 24px; padding: 4px 0 4px 18px; border-left: 2px solid var(--glow); font: 500 18px/1.45 var(--f-head); color: var(--ink); }

/* FAQ */
.faq { margin-top: 28px; display: grid; gap: 0; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 18px; min-height: 64px; padding: 14px 0; font: 600 17.5px/1.35 var(--f-head); }
.faq summary::after { content: ""; flex: none; width: 12px; height: 12px; border-right: 2px solid var(--ink-2); border-bottom: 2px solid var(--ink-2); transform: rotate(45deg) translateY(-3px); transition: transform .3s var(--ease); }
.faq details[open] summary::after { transform: rotate(225deg) translateY(-3px); border-color: var(--accent); }
.faq summary:hover { color: #fff; }
.faq details p { margin: 0 0 20px; max-width: 64ch; }

/* Contatti */
.contact .panel { text-align: center; }
.brief { margin: 32px auto 0; padding: 22px 24px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: rgba(10,14,24,.45); text-align: left; max-width: 520px; }
.brief h3 { font-size: 17px; }
.brief p { margin: 6px 0 10px; font-size: 15px; }
.brief ul { margin: 0; padding-left: 20px; color: var(--ink-2); font-size: 15px; display: grid; gap: 4px; }

/* Footer */
.footer { position: relative; z-index: 10; display: flex; flex-wrap: wrap; gap: 28px; align-items: center; justify-content: space-between;
  padding: 40px var(--gutter); background: rgba(8,11,19,.85); border-top: 1px solid var(--line); backdrop-filter: blur(12px); }
.f-brand img { height: 18px; width: auto; }
.f-brand p { margin: 10px 0 0; color: var(--ink-3); font-size: 14px; }
.f-contacts { display: flex; flex-wrap: wrap; gap: 28px; }
.f-contacts a { text-decoration: none; font: 600 16px/1.3 var(--f-head); display: grid; min-height: 44px; align-content: center; }
.f-contacts a span { font: 500 11px/1.4 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.f-contacts a:hover { color: var(--accent-2); }
.f-top { color: var(--ink-2); text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; gap: 6px; }
.f-top:hover { color: var(--ink); }

/* Reveal */
.reveal { transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.cards .reveal:nth-child(2) { transition-delay: .08s; } .cards .reveal:nth-child(3) { transition-delay: .16s; } .cards .reveal:nth-child(4) { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-hint span { animation: none; }
  .card, .btn, .link span { transition: none; }
}

/* Mobile: pannelli sempre leggibili sopra la scena */
@media (max-width: 860px) {
  .stage, .stage[data-side] { align-items: stretch; text-align: left; min-height: auto; padding-top: 88px; padding-bottom: 88px; }
  .stage[data-side="center"] .eyebrow { justify-content: flex-start; }
  .contact .panel, .cta-center { text-align: left; justify-content: flex-start; }
  .panel-bare { padding: 0; }
  .panel { padding: 22px; }
  .stage.hero { min-height: calc(100svh - 100px); padding-top: 40svh; }
  .hero .panel-bare { margin-left: -16px; margin-right: -16px; padding: 28px 16px 8px; background: linear-gradient(180deg, rgba(10,14,24,0) 0, rgba(10,14,24,.78) 70px, rgba(10,14,24,.78) 100%); border-radius: 0; }
  .scroll-hint { display: none; }
}

/* Nav compatta su schermi stretti */
.nav .btn { white-space: nowrap; }
@media (max-width: 420px) { .nav { gap: 12px; } .nav .btn { font-size: 13px; padding: 0 14px; } .brand img { height: 17px; } }