/* Dune — charte v3 (2026-10-29). Sombre par défaut, clair via prefers-color-scheme.
   Polices auto-hébergées Geist / Geist Mono (OFL, voir fonts/OFL-Geist.txt). Zéro JS. */
@font-face{font-family:"Geist";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/geist-400.woff2") format("woff2")}
@font-face{font-family:"Geist";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/geist-500.woff2") format("woff2")}
@font-face{font-family:"Geist Mono";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/geist-mono-400.woff2") format("woff2")}

:root{
  color-scheme:dark light;
  --bg:#0B0D12;--surface:#12151C;--surface-2:#171B24;--line:#232834;--line-strong:#313847;
  --text:#E6E8EE;--muted:#8A91A0;--accent:#7C8CFF;--sand:#D9B48F;
  --grid:rgba(230,232,238,.045);--topo:rgba(230,232,238,.085);--header:rgba(11,13,18,.82);
  --measure:54ch;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gutter:clamp(16px,4vw,32px);--max:1160px;
}
@media (prefers-color-scheme:light){
  :root{
    --bg:#F7F8FA;--surface:#FFFFFF;--surface-2:#EEF0F4;--line:#DDE1E8;--line-strong:#C3C9D4;
    --text:#0E1117;--muted:#535B69;--accent:#4350D8;--sand:#9C7346;
    --grid:rgba(14,17,23,.05);--topo:rgba(14,17,23,.09);--header:rgba(247,248,250,.85);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:5rem}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-weight:400;font-size:1.0625rem;line-height:1.6;font-synthesis:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
h1,h2,h3{font-weight:500;margin:0;color:var(--text);text-wrap:balance}
p,ul,ol,dl,dd,figure{margin:0}
p,li,dd{text-wrap:pretty}
ul,ol{padding:0;list-style:none}
a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.22em}
a:hover{color:var(--text)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:var(--gutter);top:-4rem;z-index:20;background:var(--text);color:var(--bg);padding:.6rem 1rem;text-decoration:none}
.skip:focus{top:1rem}
.wrap{width:100%;max-width:calc(var(--max) + 2 * var(--gutter));margin:0 auto;padding-inline:var(--gutter)}
.mono,.mono-label,.kicker,.step-num,.offer-step,.case-kicker{font-family:var(--mono);font-weight:400}

/* Typographie */
h1{font-size:clamp(2.35rem,5.4vw,4.5rem);line-height:1.02;letter-spacing:-.035em;max-width:17ch}
h2{font-size:clamp(1.65rem,3.1vw,2.6rem);line-height:1.08;letter-spacing:-.03em;max-width:24ch}
h3{font-size:1.15rem;line-height:1.3;letter-spacing:-.012em}
.kicker{font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem}
.lead{font-size:clamp(1.08rem,1.5vw,1.22rem);line-height:1.55;color:var(--muted);max-width:var(--measure)}
.step-num{font-size:.8rem;letter-spacing:.04em;color:var(--accent);font-variant-numeric:tabular-nums}
.mono-label{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* En-tête */
.site-header{position:sticky;top:0;z-index:10;background:var(--header);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:1.5rem;min-height:4rem}
.brand{display:inline-flex;align-items:center;gap:.7rem;color:var(--text);text-decoration:none;flex:none}
.brand:hover{color:var(--text)}
.brand-mark{width:46px;height:auto;display:block;color:var(--text)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-weight:500;font-size:1.02rem;letter-spacing:.18em}
.brand-sub{font-family:var(--mono);font-size:.6875rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:.2rem}
.nav{margin-left:auto}
.nav ul{display:flex;flex-wrap:wrap;gap:.2rem 1.4rem}
.nav a{color:var(--muted);text-decoration:none;font-size:.9rem;padding:.35rem 0;display:inline-block}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text)}
.nav a[aria-current="page"]{box-shadow:inset 0 -1px 0 var(--accent)}
.lang{font-family:var(--mono);font-size:.75rem;letter-spacing:.06em;color:var(--muted);text-decoration:none;border:1px solid var(--line-strong);padding:.2rem .45rem}
.lang:hover{color:var(--text);border-color:var(--muted)}

/* Boutons et liens d'action */
.actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2.25rem}
.button{display:inline-flex;align-items:center;min-height:2.9rem;padding:.7rem 1.15rem;background:var(--text);color:var(--bg);text-decoration:none;font-weight:500;font-size:.95rem;border:1px solid var(--text)}
.button:hover{background:var(--accent);border-color:var(--accent);color:var(--bg)}
.button-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.button-ghost:hover{background:transparent;color:var(--text);border-color:var(--accent)}
.section-links{display:flex;flex-wrap:wrap;gap:.5rem 2rem;margin-top:2rem;font-size:.95rem}

/* Ouverture */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;pointer-events:none;-webkit-mask-image:radial-gradient(ellipse 80% 75% at 50% 35%,#000 35%,transparent 100%);mask-image:radial-gradient(ellipse 80% 75% at 50% 35%,#000 35%,transparent 100%)}
.topo{position:absolute;left:0;right:0;bottom:-6%;width:100%;height:78%;color:var(--topo)}
.hero-inner{position:relative;padding-block:clamp(5rem,13vw,9.5rem) clamp(4.5rem,10vw,7.5rem)}
.hero h1{max-width:15ch}
.hero-lead{margin-top:1.75rem;font-size:clamp(1.1rem,1.7vw,1.3rem);line-height:1.55;color:var(--muted);max-width:58ch}

/* Sections */
.section{padding-block:clamp(4rem,8vw,6.5rem);border-top:1px solid var(--line)}
.hero+.section{border-top:0}
.section-head{margin-bottom:clamp(2rem,4vw,3rem)}
.section-head .lead{margin-top:1.1rem}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:clamp(1.5rem,5vw,4rem);align-items:start}
.split .section-head{margin-bottom:0}

/* En-tête de page intérieure */
.page-head{position:relative;padding-block:clamp(4rem,10vw,7rem) clamp(2.5rem,6vw,4rem);border-bottom:1px solid var(--line)}
.page-head .lead{margin-top:1.4rem}
.page-head+.section{border-top:0}

/* Schémas SVG */
.diagram{margin-bottom:clamp(2rem,4vw,3rem)}
.diagram svg{display:block;width:100%;height:auto;overflow:visible}
.diagram-v{display:none!important}
.d-node{fill:var(--surface);stroke:var(--line-strong);stroke-width:1}
.d-human{stroke:var(--accent)}
.d-num,.d-step{font-family:var(--mono);font-size:13px;fill:var(--accent)}
.d-step{font-size:11px}
.d-title{font-family:var(--sans);font-weight:500;font-size:28px;letter-spacing:-.02em;fill:var(--text)}
.d-out{font-family:var(--mono);font-size:12.5px;fill:var(--muted)}
.d-label{font-family:var(--sans);font-weight:500;font-size:13.5px;fill:var(--text)}
.d-arrow path{fill:none;stroke:var(--accent);stroke-width:1.5}
.d-zone{fill:none;stroke:var(--muted);stroke-width:1;stroke-dasharray:4 4}
.d-zone-label,.d-gateway-label{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;fill:var(--muted)}
.d-gateway{fill:var(--surface-2);stroke:var(--line-strong);stroke-width:1}
.d-gateway-label{fill:var(--text)}
.d-link path{fill:none;stroke:var(--muted);stroke-width:1;stroke-dasharray:2 3}

/* Vignettes IA */
.tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.tile{display:flex;flex-direction:column;gap:.55rem;padding:1.6rem 1.5rem 1.8rem;background:var(--surface);color:var(--text);text-decoration:none}
.tile:hover{background:var(--surface-2);color:var(--text)}
.tile-title{font-weight:500;font-size:1.25rem;letter-spacing:-.015em}
.tile-text{color:var(--muted);font-size:.97rem}

/* Situations */
.situations li{border-top:1px solid var(--line);padding:1rem 0 1rem 1.6rem;position:relative}
.situations li:last-child{border-bottom:1px solid var(--line)}
.situations li::before{content:"";position:absolute;left:0;top:1.62rem;width:.6rem;height:1px;background:var(--accent)}

/* Cas */
.case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.case-card{background:var(--surface);padding:1.6rem 1.6rem 1.8rem}
.case-kicker{font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:.8rem}
.case-card h3{margin-bottom:.7rem}
.case-card p:not(.case-kicker){color:var(--muted);font-size:.98rem}
.case-list{border-bottom:1px solid var(--line)}
.case-row{border-top:1px solid var(--line);padding-block:2rem;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:clamp(1.5rem,4vw,3rem)}
.case-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}
.case-cols dt{font-family:var(--mono);font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);margin-bottom:.4rem}
.case-cols dd{color:var(--muted);font-size:.97rem}

/* Offres */
.offers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.offer-card{display:flex;flex-direction:column;background:var(--surface);padding:1.8rem 1.7rem}
.offer-card:last-child:nth-child(odd){grid-column:1/-1}
.offer-step{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:.8rem}
.offer-card h3{font-size:1.3rem;margin-bottom:.7rem}
.offer-card>p{color:var(--muted)}
.offer-card .mono-label{margin-top:1.1rem;margin-bottom:.5rem}
.ticks li{position:relative;padding-left:1rem;margin:.2rem 0;color:var(--text)}
.ticks li::before{content:"";position:absolute;left:0;top:.7em;width:5px;height:5px;background:var(--accent)}
.offer-meta{margin-top:auto;padding-top:1.4rem}
.offer-meta p{border-top:1px solid var(--line);padding-top:.7rem;margin-top:.7rem;font-size:.85rem;color:var(--muted)}
.offer-meta .price{color:var(--text);font-size:.95rem;font-variant-numeric:tabular-nums}
.price-note{color:var(--muted);font-size:.85rem;font-variant-numeric:tabular-nums}
.offer-link{margin-top:1.1rem;font-size:.95rem}
.format-note{border:1px solid var(--line);background:var(--surface);padding:1.1rem 1.3rem;margin-top:-2rem;margin-bottom:clamp(3rem,6vw,4.5rem)}
.format-note .mono-label{margin-right:.5rem}

/* Listes de définitions (IA, repères, contact, mentions) */
.spec>div{display:grid;grid-template-columns:minmax(0,15rem) minmax(0,1fr);gap:.4rem 2rem;border-top:1px solid var(--line);padding-block:1.15rem}
.spec>div:last-child{border-bottom:1px solid var(--line)}
.spec dt{font-weight:500}
.spec dd{color:var(--muted);max-width:var(--measure)}
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.spec-grid>div{display:block;background:var(--surface);padding:1.5rem;border:0}
.spec-grid>div:last-child{border:0}
.spec-grid dt{margin-bottom:.5rem}
.ia-section .section-head .step-num{margin-bottom:.8rem}
.ia-section .spec dd::first-letter{text-transform:uppercase}

/* Offre d'entrée (IA) */
.offer{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:clamp(1.5rem,4vw,3rem);border:1px solid var(--line-strong);background:var(--surface);padding:clamp(1.6rem,4vw,2.6rem)}
.offer h2{margin-bottom:1rem}
.offer p{color:var(--muted)}
.offer .offer-after{margin-top:1rem;color:var(--text)}
.offer-facts{align-self:end}
.offer-facts p{border-top:1px solid var(--line);padding-top:.8rem;margin-top:.8rem;font-size:.9rem}
.offer-facts .price{color:var(--text)}

/* Contact */
.contact-box>div{border-top:1px solid var(--line);padding-block:1.1rem}
.contact-box>div:last-child{border-bottom:1px solid var(--line)}
.contact-box dt{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:.3rem}
.contact-box dd{font-size:clamp(1.15rem,2vw,1.4rem);letter-spacing:-.01em}
.contact-box a{color:var(--text)}
.contact-box a:hover{color:var(--accent)}
.founder{max-width:var(--measure)}
.founder p{font-size:clamp(1.02rem,1.3vw,1.1rem);line-height:1.6}
.founder p+p{margin-top:1rem;color:var(--muted)}

/* Appel à l'action */
.cta{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(1.5rem,4vw,3rem);align-items:end;border:1px solid var(--line-strong);background:var(--surface);padding:clamp(1.6rem,4vw,2.6rem)}
.cta-body p{color:var(--muted);margin-bottom:1.4rem}

/* Pied de page */
.site-footer{border-top:1px solid var(--line);padding-block:3rem 2rem;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);gap:2rem}
.footer-brand .tag{margin-top:1rem;color:var(--muted);max-width:32ch}
.footer-col li{margin:.35rem 0}
.footer-col a{color:var(--muted);text-decoration:none}
.footer-col a:hover{color:var(--text)}
address{font-style:normal}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem 2rem;margin-top:2.5rem;padding-top:1.25rem;border-top:1px solid var(--line);color:var(--muted);font-family:var(--mono);font-size:.74rem;letter-spacing:.03em}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--text)}

/* Mobile */
@media (max-width:900px){
  .tiles,.case-grid,.offers,.spec-grid,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .split,.case-row,.cta,.offer{grid-template-columns:minmax(0,1fr)}
  .case-cols{grid-template-columns:minmax(0,1fr)}
}
/* En-tête empilé : la navigation passe sous la marque avant de se replier à côté d'elle. */
@media (max-width:940px){
  .header-inner{flex-wrap:wrap;gap:.5rem 1rem;padding-block:.7rem}
  .nav{order:3;margin-left:0;width:100%}
  .lang{margin-left:auto}
}
@media (max-width:720px){
  .nav ul{gap:.1rem 1rem}
  .nav a{font-size:.86rem}
  .diagram-h{display:none!important}
  .diagram-v{display:block!important}
  .spec>div{grid-template-columns:minmax(0,1fr);gap:.35rem}
  .format-note{margin-top:-1rem}
}
/* Homepage (2026-10-30) : interventions, démarche compacte, pourquoi maintenant, preuves */
.section-head-tight{margin-bottom:clamp(1.5rem,3vw,2.2rem)}
.investor-line{margin-top:1.2rem;padding:1rem 1.2rem;border:1px solid var(--line);color:var(--muted)}
.investor-line .mono-label{color:var(--accent);margin-right:.5rem}
.investor-line a{margin-left:.4rem;white-space:nowrap}
.section-compact{padding-block:clamp(2.6rem,5vw,3.6rem)}
.approach{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:clamp(1.5rem,4vw,3rem);align-items:center}
.approach h2{font-size:clamp(1.4rem,2.4vw,1.9rem)}
.approach .kicker{margin-bottom:.6rem}
.approach-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line);background:var(--surface)}
.approach-steps li{position:relative;display:flex;flex-direction:column;gap:.25rem;padding:1.05rem 1.3rem 1.15rem}
.approach-steps li+li{border-left:1px solid var(--line)}
.approach-steps li+li::before{content:"";position:absolute;left:-6px;top:50%;width:10px;height:10px;margin-top:-5px;background:var(--surface);border-top:1px solid var(--accent);border-right:1px solid var(--accent);transform:rotate(45deg)}
.approach-steps strong{font-weight:500;font-size:1.08rem}
.approach-steps span:last-child{color:var(--muted);font-size:.95rem}
.section-why{background:var(--surface);border-bottom:1px solid var(--line)}
.h2-wide{max-width:22ch;font-size:clamp(1.9rem,3.8vw,3.1rem)}
.why-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1.5rem,3vw,2.5rem)}
.why-item{border-top:1px solid var(--accent);padding-top:1.1rem}
.why-item h3{margin-bottom:.55rem}
.why-item p{color:var(--muted)}
.why-conclusion{margin-top:clamp(1.8rem,3vw,2.4rem);font-size:clamp(1.15rem,1.8vw,1.4rem);letter-spacing:-.015em;max-width:40ch}
.shifts{margin-top:clamp(2rem,4vw,2.8rem);border:1px solid var(--line-strong);background:var(--bg);padding:1.1rem 1.3rem 1.2rem}
.shifts .mono-label{color:var(--accent);margin-bottom:.7rem}
.shifts ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.55rem 2rem}
.shifts li{display:flex;flex-wrap:wrap;align-items:baseline;gap:.2rem .55rem;font-family:var(--mono);font-size:.86rem}
.shift-from{color:var(--muted)}
.shift-arrow{color:var(--accent)}
.shift-to{color:var(--text)}
.proofs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.proof{background:var(--surface);padding:1.4rem 1.4rem 1.6rem}
.proof h3{margin-bottom:.5rem}
.proof p:not(.case-kicker){color:var(--muted);font-size:.97rem}
.proof-background{margin-top:1.4rem;font-size:clamp(1.05rem,1.5vw,1.2rem);max-width:60ch}
/* Homepage : rythme vertical resserré */
.hero ~ .section{padding-block:clamp(3rem,6vw,4.6rem)}
.hero ~ .section-compact{padding-block:clamp(2.4rem,4.5vw,3.2rem)}
.hero .hero-inner{padding-block:clamp(4.5rem,11vw,8rem) clamp(3.5rem,8vw,5.5rem)}
.hero ~ .section .situations li{padding-block:.8rem}
.hero ~ .section .situations li::before{top:1.42rem}
@media (max-width:900px){
  .why-grid,.proofs,.approach{grid-template-columns:minmax(0,1fr)}
  .shifts ul{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  .approach-steps{grid-template-columns:minmax(0,1fr)}
  .approach-steps li+li{border-left:0;border-top:1px solid var(--line)}
  .approach-steps li+li::before{left:1.3rem;top:-6px;margin-top:0;transform:rotate(135deg)}
  .shifts ul{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Libellés en casse normale, dans la police du texte (2026-11-01 : plus de capitales espacées en mono) */
.mono-label,.case-kicker,.case-cols dt,.contact-box dt,h2.kicker{font-family:var(--sans);text-transform:none;letter-spacing:0;font-size:.9rem;color:var(--muted)}
.investor-line .mono-label{color:var(--text);font-weight:500;margin-right:.35rem}
.footer-meta{display:inline-flex;gap:1.25rem}