/* Ad Story Growth — mobile d'abord, puis grands écrans à partir de 900 px. */
@font-face{font-family:"Geist";src:url("/assets/fonts/geist.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("/assets/fonts/geist-mono.woff2") format("woff2");font-weight:100 900;font-display:swap}

:root{--bleu:#2230E6;--encre:#111318;--fond:#F3F4EF;--ligne:#D5D7CF;--gris-clair:#B6B9C2;--ligne-sombre:#5A5D66;--mono:"Geist Mono",ui-monospace,monospace}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--fond);color:var(--encre);font-family:"Geist",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.4}
a{color:inherit}
a:focus-visible{outline:2px solid currentColor;outline-offset:3px}
strong{font-weight:600}
h1,h2,p{margin:0}
h1,h2{font-weight:400;text-wrap:balance}

.conteneur{max-width:1200px;margin:0 auto;padding:0 16px}

.entete{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0}
.marque{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:500;font-size:17px;letter-spacing:-.02em;text-decoration:none}
.marque img{display:block}
.lien-mono{font-family:var(--mono);font-size:13px;color:var(--bleu);padding:12px 0}

.hero{display:flex;flex-direction:column;gap:14px;padding:12px 0 20px}
.hero h1{font-size:clamp(42px,5.8vw,84px);line-height:.98;letter-spacing:-.045em;margin-bottom:12px}
.hero p{font-size:17px;max-width:620px}

.bouton{display:block;text-align:center;text-decoration:none;padding:14px 20px;font-weight:500;transition:background-color .15s,color .15s}
.bouton.bleu{background:var(--bleu);color:#fff}
.bouton.blanc{background:#fff;color:var(--encre)}
.bouton:hover{background:var(--encre);color:#fff}

.methode{display:flex;flex-direction:column;gap:12px;padding-bottom:28px}
.graphe{position:relative;height:clamp(210px,28vw,400px);border:1px solid var(--encre);background-image:linear-gradient(var(--ligne) 1px,transparent 1px),linear-gradient(90deg,var(--ligne) 1px,transparent 1px);background-size:100% 25%,25% 100%}
.graphe svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.reperes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding-top:6px;font-family:var(--mono);font-size:13px;color:var(--bleu)}

.etapes{list-style:none;margin:0;padding:0}
.etapes li{display:grid;grid-template-columns:26px minmax(0,1fr);padding:8px 0;border-bottom:1px solid var(--encre)}
.num{font-family:var(--mono);font-size:13px;color:var(--bleu);padding-top:2px}

.sombre{background:var(--encre);color:var(--fond);padding:24px 0 20px}
.sombre h2{font-size:clamp(30px,3.6vw,48px);line-height:1.02;letter-spacing:-.04em;margin-bottom:16px}
.services>div{display:grid;grid-template-columns:96px minmax(0,1fr);gap:8px;border-top:1px solid var(--ligne-sombre);padding:10px 0}
.etiquette{font-family:var(--mono);font-size:13px;color:var(--gris-clair);padding-top:2px}

.contact{background:var(--bleu);color:#fff;padding:24px 0;scroll-margin-top:0}
.contact-bloc{display:flex;flex-direction:column;gap:14px}
.contact h2{font-size:clamp(38px,4.6vw,64px);line-height:1;letter-spacing:-.045em;margin-bottom:6px}

.pied{padding:20px 0 24px;font-size:14px;line-height:1.45}
.pied-haut{display:flex;flex-direction:column;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--encre);margin-bottom:12px}
.pied-liens{display:flex;flex-direction:column}
.pied-liens a{padding:9px 0}
.avertissement{color:#4A4E57;font-size:13px;margin-bottom:8px;max-width:820px}
.copyright{font-family:var(--mono);font-size:12px;margin-top:12px}

.legal{padding-top:12px;padding-bottom:32px;max-width:760px}
.legal h1{font-size:clamp(38px,4.6vw,64px);line-height:1;letter-spacing:-.045em;margin-bottom:20px}
.legal h2{font-size:21px;font-weight:500;letter-spacing:-.02em;margin:24px 0 8px}
.legal dl{margin:0}
.legal dl{display:grid;grid-template-columns:112px minmax(0,1fr);column-gap:10px}
.legal dt,.legal dd{margin:0;padding:8px 0;border-top:1px solid var(--encre)}
.legal dt{font-family:var(--mono);font-size:13px;padding-top:10px}
.legal p+p{margin-top:10px}
.legal .maj{font-family:var(--mono);font-size:13px;margin:-8px 0 8px}

@media (min-width:900px){
  .entete{padding:14px 0}
  .hero{flex-direction:row;align-items:flex-end;justify-content:space-between;gap:56px;padding:28px 0 32px}
  .hero-texte{flex:1 1 auto;min-width:0}
  .hero .bouton{flex:0 0 240px}
  .methode{flex-direction:row;align-items:center;gap:40px;padding-bottom:56px}
  .graphe-bloc{flex:1 1 62%;min-width:0}
  .etapes{flex:1 1 38%;min-width:0}
  .etapes li{padding:12px 0}
  .sombre{padding:48px 0 36px}
  .sombre h2{margin-bottom:28px}
  .services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:32px}
  .contact{padding:44px 0}
  .contact-bloc{flex-direction:row;align-items:center;justify-content:space-between;gap:40px}
  .contact .bouton{flex:0 0 280px}
  .pied{padding:28px 0 32px}
  .pied-haut{flex-direction:row;align-items:center;justify-content:space-between;gap:32px;padding-bottom:16px;margin-bottom:16px}
  .pied-liens{flex-direction:row;gap:28px}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.bouton{transition:none}}