/* ============================================================
   ARVION NETWORK — DESIGN SYSTEM « AZUR » (feuille partagée)
   Source de vérité unique. Toutes les pages lient ce fichier.
   Couleurs : Marine (surfaces) + Azur (bleu signature) + Cyan
   Type     : Space Grotesk (display) · Manrope (corps) · Space Mono (données)
   ============================================================ */

/* ===== TOKENS ===== */
:root{
  --obsidian:#0A0E1A; --nocturne:#101728; --slate:#182134; --slate-line:#26324B;
  --azur:#3B9AFF; --azur-bright:#7FBEFF; --azur-deep:#1E5FCC; --cyan:#35D6E0;
  --haze:#EAF0FA; --mist:#9AA6BE; --mist-dim:#616E86;
  --s-1:.25rem;--s-2:.5rem;--s-3:.75rem;--s-4:1rem;--s-5:1.5rem;--s-6:2rem;--s-7:3rem;--s-8:4rem;--s-9:6rem;--s-10:8rem;
  --r-sm:8px;--r-md:14px;--r-lg:22px;--r-pill:999px;
  --fs-eyebrow:.78rem;--fs-body:1.0625rem;
  --fs-lead:clamp(1.15rem,1rem + .7vw,1.4rem);
  --fs-h3:clamp(1.25rem,1.05rem + .8vw,1.6rem);
  --fs-h2:clamp(1.9rem,1.4rem + 2.2vw,3rem);
  --fs-display:clamp(2.6rem,1.6rem + 4.6vw,5.2rem);
  --shadow-card:0 1px 0 rgba(255,255,255,.03) inset, 0 20px 50px -30px rgba(0,0,0,.9);
  --glow-azur:0 0 60px -12px rgba(59,154,255,.5);
  --ease:cubic-bezier(.22,.61,.36,1);--dur:.6s;
  --maxw:1180px;--gutter:clamp(1.25rem,5vw,4rem);
}

/* ===== BASE ===== */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--obsidian);color:var(--haze);font-family:"Manrope",system-ui,sans-serif;font-size:var(--fs-body);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:radial-gradient(1200px 700px at 78% -8%,rgba(59,154,255,.16),transparent 60%),radial-gradient(900px 700px at 8% 12%,rgba(53,214,224,.08),transparent 55%),radial-gradient(1000px 900px at 50% 120%,rgba(30,95,204,.12),transparent 60%)}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
h1,h2,h3,h4{font-family:"Space Grotesk",sans-serif;font-weight:600;line-height:1.08;letter-spacing:-.02em;margin:0}
p{margin:0}
a{color:inherit;text-decoration:none}
img,svg{display:block}
:focus-visible{outline:2px solid var(--azur);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.skip{position:absolute;left:-999px;top:0;background:var(--azur);color:var(--obsidian);padding:.6rem 1rem;border-radius:0 0 var(--r-sm) 0;z-index:200;font-weight:600}
.skip:focus{left:0}

/* ===== COMPOSANTS ===== */
.eyebrow{font-family:"Space Mono",monospace;font-size:var(--fs-eyebrow);letter-spacing:.22em;text-transform:uppercase;color:var(--azur);display:inline-flex;align-items:center;gap:.6rem}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--azur);opacity:.6}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:.98rem;padding:.85rem 1.5rem;border-radius:var(--r-pill);border:1px solid transparent;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease)}
.btn--primary{background:linear-gradient(180deg,var(--azur),var(--azur-deep));color:#fff;box-shadow:var(--glow-azur)}
.btn--primary:hover{transform:translateY(-2px);background:linear-gradient(180deg,var(--azur-bright),var(--azur));box-shadow:0 0 70px -8px rgba(59,154,255,.65)}
.btn--ghost{background:transparent;color:var(--haze);border-color:var(--slate-line)}
.btn--ghost:hover{border-color:var(--azur);color:var(--azur);transform:translateY(-2px)}
.chip{display:inline-flex;align-items:center;gap:.5rem;font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.06em;color:var(--mist);background:var(--nocturne);border:1px solid var(--slate-line);border-radius:var(--r-pill);padding:.42rem .85rem}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.chip--live .dot{background:var(--cyan)}
.chip--progress .dot{background:var(--azur)}
.chip--planned .dot{background:var(--mist-dim)}
.card{background:linear-gradient(180deg,var(--nocturne),rgba(16,23,40,.6));border:1px solid var(--slate-line);border-radius:var(--r-lg);padding:var(--s-6);box-shadow:var(--shadow-card);transition:transform .35s var(--ease),border-color .35s var(--ease)}
.card:hover{transform:translateY(-4px);border-color:rgba(59,154,255,.45)}
.card__idx{font-family:"Space Mono",monospace;font-size:.8rem;color:var(--azur);opacity:.85}
.card h3{font-size:var(--fs-h3);margin:.9rem 0 .55rem}
.card p{color:var(--mist);font-size:1rem}
.card--link{display:flex;flex-direction:column;gap:.5rem}
.card--link .go{margin-top:auto;color:var(--azur);font-family:"Space Mono",monospace;font-size:.8rem;padding-top:.6rem}
.stat__num{font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:clamp(1.8rem,1.2rem+1.6vw,2.6rem);letter-spacing:-.03em}
.stat__lbl{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mist-dim);margin-top:.35rem}

/* ===== SECTIONS ===== */
section{padding-block:clamp(3.5rem,7vw,7rem)}
.section-head{max-width:640px;margin-bottom:var(--s-7)}
.section-head h2{font-size:var(--fs-h2);margin:.9rem 0 .8rem}
.section-head p{color:var(--mist);font-size:var(--fs-lead)}

/* ===== NAV ===== */
.nav{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);background:rgba(10,14,26,.72);border-bottom:1px solid transparent;transition:border-color .3s}
.nav.scrolled{border-color:var(--slate-line)}
.nav__in{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:.7rem;font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:1.2rem;letter-spacing:-.02em}
.brand svg{width:30px;height:30px}
.nav__links{display:flex;align-items:center;gap:2rem;list-style:none;margin:0;padding:0}
.nav__links a{font-size:.95rem;color:var(--mist);font-weight:500;transition:color .2s}
.nav__links a:hover,.nav__links a[aria-current="page"]{color:var(--haze)}
.nav__links a[aria-current="page"]{color:var(--azur)}
.nav__cta{display:flex;align-items:center;gap:1rem}
.nav__toggle{display:none;background:none;border:0;color:var(--haze);cursor:pointer;padding:.4rem}

/* ===== HERO (accueil) ===== */
.hero{position:relative;padding-top:clamp(3rem,6vw,5rem);padding-bottom:clamp(3.5rem,7vw,6rem)}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.hero h1{font-size:var(--fs-display);font-weight:700;margin:1.4rem 0 1.5rem}
.hero h1 .accent{background:linear-gradient(100deg,var(--azur),var(--azur-bright) 55%,var(--azur-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{color:var(--mist);font-size:var(--fs-lead);max-width:34ch;margin-bottom:2rem}
.hero__actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-bottom:1.6rem}
.hero__note{font-family:"Space Mono",monospace;font-size:.76rem;color:var(--mist-dim);letter-spacing:.03em}
.orbit{position:relative;aspect-ratio:1;max-width:460px;margin-inline:auto;width:100%}
.orbit svg{width:100%;height:100%;overflow:visible}
.orbit .ring{fill:none;stroke:var(--slate-line);stroke-width:1}
.orbit .arc{fill:none;stroke:var(--azur);stroke-width:1.5;opacity:.5;stroke-linecap:round}
.orbit .node{fill:var(--haze)}
.orbit .node--accent{fill:var(--azur)}
.orbit .node--cyan{fill:var(--cyan)}
.orbit .core{fill:url(#coreGrad)}
.orbit__spin{transform-origin:center;animation:spin 44s linear infinite}
.orbit__spin--rev{transform-origin:center;animation:spin 60s linear infinite reverse}
.orbit__pulse{transform-origin:center;animation:pulse 5s var(--ease) infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:.55}50%{opacity:1}}
.ledger{position:absolute;bottom:-6%;left:-4%;width:min(260px,72%);background:linear-gradient(180deg,rgba(24,33,52,.96),rgba(16,23,40,.96));border:1px solid var(--slate-line);border-radius:var(--r-md);padding:1rem 1.15rem;box-shadow:0 30px 60px -30px #000;backdrop-filter:blur(6px)}
.ledger__row{display:flex;align-items:center;justify-content:space-between;font-size:.82rem}
.ledger__row+.ledger__row{margin-top:.55rem;padding-top:.55rem;border-top:1px solid var(--slate-line)}
.ledger__label{color:var(--mist);display:flex;align-items:center;gap:.5rem}
.ledger__mark{width:20px;height:20px;border-radius:6px;background:rgba(53,214,224,.16);display:grid;place-items:center;color:var(--cyan);font-size:.7rem}
.ledger__val{font-family:"Space Mono",monospace;color:var(--azur);font-weight:700}
.ledger__foot{margin-top:.85rem;font-family:"Space Mono",monospace;font-size:.66rem;color:var(--mist-dim);letter-spacing:.04em}

/* ===== BANDE ===== */
.strip{border-block:1px solid var(--slate-line);background:rgba(16,23,40,.4)}
.strip__in{display:flex;flex-wrap:wrap;gap:.75rem 1rem;justify-content:center;padding-block:1.4rem}

/* ===== GRILLES ===== */
.grid{display:grid;gap:var(--s-5)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--2{grid-template-columns:1fr 1fr;gap:var(--s-7);align-items:center}
.grid--2.top{align-items:start}

/* ===== PROBLÈME / LISTE NUMÉROTÉE ===== */
.prob{display:flex;gap:1rem;padding:1.15rem 0;border-top:1px solid var(--slate-line)}
.prob__n{font-family:"Space Mono",monospace;color:var(--azur-deep);font-size:.85rem;flex:0 0 auto;padding-top:.15rem}
.prob strong{font-family:"Space Grotesk",sans-serif;font-weight:600;display:block;margin-bottom:.2rem}
.prob span{color:var(--mist);font-size:.98rem}

/* ===== TOKENOMICS ===== */
.alloc{margin-top:var(--s-6)}
.alloc__bar{display:flex;height:14px;border-radius:var(--r-pill);overflow:hidden;border:1px solid var(--slate-line)}
.alloc__seg{height:100%}
.alloc__legend{display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem 1.5rem;margin-top:1.4rem}
.alloc__item{display:flex;align-items:center;gap:.6rem;font-size:.9rem;color:var(--mist)}
.alloc__sw{width:11px;height:11px;border-radius:3px;flex:0 0 auto}
.alloc__pct{margin-left:auto;font-family:"Space Mono",monospace;color:var(--haze)}
.note-inline{margin-top:1.4rem;font-family:"Space Mono",monospace;font-size:.74rem;color:var(--mist-dim);border-left:2px solid var(--azur-deep);padding-left:.8rem;line-height:1.6}

/* ===== ROADMAP ===== */
.road{position:relative;padding-left:1.6rem}
.road::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:var(--slate-line)}
.road__item{position:relative;padding:0 0 1.7rem}
.road__item::before{content:"";position:absolute;left:-1.6rem;top:6px;width:11px;height:11px;border-radius:50%;background:var(--obsidian);border:2px solid var(--azur-deep)}
.road__item--active::before{background:var(--azur);border-color:var(--azur);box-shadow:0 0 0 4px rgba(59,154,255,.2)}
.road__ph{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--azur)}
.road__item h4{font-family:"Space Grotesk",sans-serif;font-size:1.1rem;font-weight:600;margin:.3rem 0}
.road__item p{color:var(--mist);font-size:.95rem}

/* ===== CTA ===== */
.cta{position:relative;overflow:hidden;border:1px solid var(--slate-line);border-radius:var(--r-lg);background:linear-gradient(160deg,rgba(24,33,52,.9),rgba(16,23,40,.7));padding:clamp(2.5rem,5vw,4.5rem);text-align:center}
.cta::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(600px 300px at 50% -10%,rgba(59,154,255,.2),transparent 70%)}
.cta h2{font-size:var(--fs-h2)}
.cta p{color:var(--mist);font-size:var(--fs-lead);max-width:44ch;margin:1rem auto 1.8rem}
.cta__actions{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap}

/* ===== FOOTER ===== */
.foot{border-top:1px solid var(--slate-line);margin-top:var(--s-8)}
.foot__grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:2.5rem;padding-block:var(--s-8) var(--s-6)}
.foot__brand p{color:var(--mist);font-size:.92rem;max-width:32ch;margin-top:1rem}
.foot__col h5{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mist-dim);margin:0 0 1rem}
.foot__col a{display:block;color:var(--mist);font-size:.92rem;padding:.3rem 0;transition:color .2s}
.foot__col a:hover{color:var(--azur)}
.foot__legal{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;border-top:1px solid var(--slate-line);padding-block:1.6rem;color:var(--mist-dim);font-size:.82rem}
.foot__legal p{max-width:60ch}

/* ===== PAGES INTÉRIEURES ===== */
.page-hero{position:relative;padding-top:clamp(3rem,6vw,5rem);padding-bottom:clamp(1.5rem,3vw,2.5rem)}
.page-hero h1{font-size:clamp(2.2rem,1.5rem+3vw,3.6rem);margin:1.1rem 0 1rem;max-width:18ch}
.page-hero .lead{color:var(--mist);font-size:var(--fs-lead);max-width:60ch}

/* prose (articles / texte long) */
.prose{max-width:70ch}
.prose>*+*{margin-top:1.1rem}
.prose h2{font-size:var(--fs-h3);margin-top:2.4rem}
.prose h3{font-size:1.15rem;margin-top:1.8rem}
.prose p,.prose li{color:var(--mist)}
.prose strong{color:var(--haze);font-weight:600}
.prose ul{padding-left:1.1rem;margin:0}
.prose li{margin-top:.5rem}
.prose li::marker{color:var(--azur)}

/* tableaux */
.tbl{width:100%;border-collapse:collapse;font-size:.95rem}
.tbl caption{text-align:left;color:var(--mist-dim);font-family:"Space Mono",monospace;font-size:.74rem;letter-spacing:.06em;margin-bottom:.8rem}
.tbl th,.tbl td{text-align:left;padding:.85rem 1rem;border-bottom:1px solid var(--slate-line)}
.tbl thead th{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mist-dim);font-weight:400}
.tbl td{color:var(--mist)}
.tbl td:first-child{color:var(--haze);font-weight:500}
.tbl .num{font-family:"Space Mono",monospace;color:var(--azur);text-align:right;white-space:nowrap}
.tbl-wrap{overflow-x:auto;border:1px solid var(--slate-line);border-radius:var(--r-md);background:rgba(16,23,40,.4)}

/* FAQ accordéon */
.faq{max-width:800px}
.faq details{border:1px solid var(--slate-line);border-radius:var(--r-md);background:var(--nocturne);margin-bottom:.8rem;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:1.15rem 1.3rem;font-family:"Space Grotesk",sans-serif;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--azur);font-size:1.4rem;line-height:1;transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details>div{padding:0 1.3rem 1.25rem;color:var(--mist)}

/* formulaire */
.form{max-width:640px;display:grid;gap:1.1rem}
.field{display:grid;gap:.45rem}
.field label{font-size:.85rem;color:var(--mist)}
.field input,.field textarea{background:var(--nocturne);border:1px solid var(--slate-line);border-radius:var(--r-sm);color:var(--haze);padding:.85rem 1rem;font:inherit;font-size:1rem;transition:border-color .2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--azur)}
.field textarea{min-height:150px;resize:vertical}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}

/* blog cards */
.postcard{display:flex;flex-direction:column;gap:.6rem}
.postcard .meta{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.08em;color:var(--azur);text-transform:uppercase}
.postcard h3{font-size:1.2rem}
.postcard p{color:var(--mist);font-size:.95rem}
.empty{border:1px dashed var(--slate-line);border-radius:var(--r-lg);padding:clamp(2rem,4vw,3.5rem);text-align:center;color:var(--mist)}
.empty h3{font-size:var(--fs-h3);color:var(--haze);margin-bottom:.6rem}

/* liens contact */
.channels{display:grid;gap:.8rem;margin-top:1.4rem}
.channels a{display:flex;align-items:center;gap:.7rem;color:var(--mist);font-size:.95rem}
.channels a:hover{color:var(--azur)}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .hero__grid,.grid--2{grid-template-columns:1fr}
  .grid--4{grid-template-columns:1fr 1fr}
  .grid--3{grid-template-columns:1fr}
  .hero__visual{order:-1;max-width:380px;margin-inline:auto}
  .foot__grid{grid-template-columns:1fr 1fr;gap:2rem}
  .nav__links,.nav__cta .btn--ghost{display:none}
  .nav__toggle{display:block}
  .nav__links.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;background:var(--obsidian);border-bottom:1px solid var(--slate-line);padding:.5rem var(--gutter) 1.2rem}
  .nav__links.open a{padding:.85rem 0;border-bottom:1px solid var(--slate-line)}
  .alloc__legend{grid-template-columns:1fr}
  .form .row{grid-template-columns:1fr}
}
@media(max-width:560px){
  .grid--4{grid-template-columns:1fr}
  .foot__grid{grid-template-columns:1fr}
  .ledger{position:static;width:100%;margin-top:1.2rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}