:root{--bg:#fafafa;--fg:#1a1a1a;--muted:#6b6b6b;--accent:#4c6fe6;--accent-dark:#2849c2;--brand:#0443ff;--accent-bg:#ecf1ff;--primary:#4c6fe6;--border:#ececed;--sans:"Helvetica Neue",Inter,system-ui,-apple-system,sans-serif;--maxw:60rem}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{font-family:var(--sans);background:var(--bg);color:var(--fg);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.6rem}
.col{max-width:42rem;margin:0 auto}

/* highlight marker (façon Nick, en bleu ScalAI) */
.hl{background:var(--brand);color:#fff;padding:0 .12em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.blue{color:var(--primary)}

/* eyebrow */
.eyebrow{font-size:.74rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.eyebrow .d{color:var(--primary)}

/* headings (bold sans, très grand) */
h1{font-weight:800;font-size:clamp(2.8rem,8.5vw,5.5rem);line-height:.98;letter-spacing:-.035em}
h2{font-weight:800;font-size:clamp(2rem,5vw,3.2rem);line-height:1.02;letter-spacing:-.03em}
h3{font-weight:700;font-size:1.35rem;letter-spacing:-.015em}
p{color:color-mix(in oklab,var(--fg) 82%,transparent)}
.lead{font-size:clamp(1.05rem,2vw,1.25rem);line-height:1.55;color:color-mix(in oklab,var(--fg) 78%,transparent)}
.muted{color:var(--muted)}
strong,b{font-weight:700;color:var(--fg)}

/* header */
header{position:sticky;top:0;z-index:40;border-bottom:1px solid var(--border);background:color-mix(in oklab,var(--bg) 85%,transparent);backdrop-filter:blur(10px)}
.hrow{display:flex;align-items:center;justify-content:space-between;padding:1rem 0;gap:1rem}
.brand{font-weight:800;font-size:1.1rem;letter-spacing:-.02em;color:var(--fg);flex:none}
.brand b{color:var(--brand)}
nav.main{display:none;align-items:center;gap:1.4rem;font-size:.82rem;color:var(--muted)}
nav.main a{transition:color .15s;white-space:nowrap}
nav.main a:hover{color:var(--fg)}
nav.main a.active{color:var(--fg);font-weight:600}
nav.main a.ext{color:var(--primary)}
@media(min-width:1000px){nav.main{display:flex}}

/* hero / page top */
.top{padding:5rem 0 3.5rem}
.top .eyebrow{display:block;margin-bottom:1.4rem}
.top h1{max-width:16ch;margin-bottom:1.6rem}
.top .lead{max-width:44ch}

/* stats row */
.stats{display:flex;flex-wrap:wrap;gap:2.5rem 3.5rem;margin:3.2rem 0 0}
.stat .num{font-weight:800;font-size:2.4rem;line-height:1;letter-spacing:-.03em}
.stat .num .hl{font-size:inherit}
.stat .lbl{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-top:.55rem;max-width:18ch}

/* divider */
.rule{border:0;border-top:1px solid var(--border);margin:0}

/* nav cards (sous-pages) */
.cards{margin:3rem 0 0}
.cardlink{display:flex;align-items:center;gap:1.2rem;padding:1.5rem 0;border-top:1px solid var(--border)}
.cardlink:last-child{border-bottom:1px solid var(--border)}
.cardlink .cbody{flex:1;min-width:0}
.cardlink h3{margin-bottom:.25rem}
.cardlink p{font-size:.95rem;color:var(--muted);margin:0}
.cardlink .arr{font-size:1.4rem;color:var(--muted);transition:transform .15s,color .15s;flex:none}
.cardlink:hover .arr{transform:translateX(4px);color:var(--primary)}

/* content sections */
section.block{padding:3.2rem 0;border-top:1px solid var(--border)}
.block .col p{margin-bottom:1.15rem;font-size:1.06rem}
.block .col p:last-child{margin-bottom:0}
.eyebrow-s{display:block;font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--primary);margin-bottom:1rem}

/* timeline */
.tl{margin:2rem auto 0;max-width:42rem}
.tlrow{display:grid;grid-template-columns:5.5rem 1fr;gap:1.4rem;padding:1.5rem 0;border-top:1px solid var(--border)}
.tlrow:last-child{border-bottom:1px solid var(--border)}
.tlrow .yr{font-weight:800;font-size:1.5rem;letter-spacing:-.02em;color:var(--primary)}
.tlrow h3{margin-bottom:.3rem}
.tlrow p{font-size:.97rem;color:var(--muted);margin:0}

/* big stat blocks (portfolio) */
.bigstats{display:grid;gap:0;margin:2rem auto 0;max-width:42rem}
.bigstat{padding:1.7rem 0;border-top:1px solid var(--border);display:flex;align-items:baseline;gap:1.3rem}
.bigstat:last-child{border-bottom:1px solid var(--border)}
.bigstat .n{font-weight:800;font-size:2.3rem;letter-spacing:-.03em;flex:none;width:6.5rem}
.bigstat .t{font-size:1rem;color:color-mix(in oklab,var(--fg) 80%,transparent)}
.bigstat .t b{color:var(--fg)}

/* CTA */
.btn{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--sans);font-size:.92rem;font-weight:600;padding:.85rem 1.8rem;border-radius:9999px;background:var(--primary);color:#fff;transition:opacity .15s,transform .15s}
.btn:hover{opacity:.9;transform:translateY(-1px)}
.cta{padding:4.5rem 0;border-top:1px solid var(--border);text-align:center}
.cta h2{max-width:18ch;margin:0 auto 1.6rem}
.cta .actions{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid color-mix(in oklab,var(--fg) 22%,transparent)}
.btn.ghost:hover{background:color-mix(in oklab,var(--fg) 5%,transparent)}

/* backlink + footer */
.backlink{display:inline-flex;align-items:center;gap:.4rem;font-size:.9rem;color:var(--primary);font-weight:600;margin-top:2.2rem}
footer{border-top:1px solid var(--border);padding:2.2rem 0;margin-top:1rem}
.frow{display:flex;flex-direction:column;gap:.7rem;justify-content:space-between;align-items:flex-start}
@media(min-width:768px){.frow{flex-direction:row;align-items:center}}
footer .brand{font-size:1rem}
footer .meta{font-size:.82rem;color:var(--muted)}
footer .meta a{color:var(--primary)}

/* ScalAI light overrides */
.btn{background:linear-gradient(125deg,#4c6fe6,#2849c2)}