:root{
  --paper:#fbf7f0; --card:#fff; --ink:#171714; --muted:#6d675f;
  --line:#ddd6c9; --line-soft:#e8e1d6; --forest:#5b52e7;
  --forest-dark:#4940c7; --forest-soft:#ece9ff; --clay:#a95e45;
  --clay-soft:#f5e2db; --red:#8f432f;
  --serif:"Inter",ui-sans-serif,system-ui,sans-serif; --sans:"Inter",ui-sans-serif,system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:74px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.66 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit}
.container{width:min(calc(100% - 44px),var(--max));margin-inline:auto}
.section{padding:78px 0;border-bottom:1px solid var(--line-soft)}
.eyebrow{margin:0 0 13px;color:var(--forest);text-transform:uppercase;letter-spacing:.14em;font-size:10.5px;font-weight:700}
h1,h2,h3{font-family:var(--sans);font-weight:800;color:var(--ink);letter-spacing:-.035em}
h1{font-size:clamp(42px,5vw,64px);line-height:1.02;margin:0 0 24px;max-width:820px;font-weight:850}
h2{font-size:clamp(30px,3.4vw,44px);line-height:1.08;margin:0 0 20px;max-width:800px;font-weight:820}
h3{font-size:22px;line-height:1.2;margin:0 0 10px;font-weight:800}
p{margin:0 0 16px}
.lede{font-size:18px;line-height:1.63;color:#3e463f;max-width:760px}
.muted{color:var(--muted)}
strong{font-weight:650}

.topbar{position:sticky;top:0;z-index:50;background:rgba(250,247,240,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line-soft)}
.topbar-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{font-family:var(--sans);font-size:22px;font-weight:900;letter-spacing:-.035em;text-decoration:none;white-space:nowrap}
.brand em{font-style:normal;color:var(--clay)}
.nav{display:flex;gap:24px;align-items:center}
.nav a{font-size:13px;text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:11px 18px;border:1px solid var(--forest);background:var(--forest);color:#fff;text-decoration:none;font-size:13.5px;font-weight:750;border-radius:12px}
.btn:hover{background:var(--forest-dark)}

.hero{padding:72px 0 80px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);gap:64px;align-items:start}
.method-card{background:var(--card);border:1px solid var(--ink);box-shadow:8px 8px 0 var(--line);padding:26px}
.method-card .label{font:10px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);display:block;margin-bottom:14px}
.method-flow{border-top:1px solid var(--line)}
.method-flow div{display:grid;grid-template-columns:42px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line-soft)}
.method-flow b{font:600 11px/1.3 var(--mono);color:var(--clay)}
.method-flow span{font-size:13.5px}
.method-note{margin-top:16px;font-size:11.5px;color:var(--muted)}

.four-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:34px}
.metric{background:var(--card);padding:24px}
.metric span{display:block;font:600 10px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--clay);margin-bottom:10px}
.metric h3{font-size:20px}
.metric p{font-size:13.5px;color:var(--muted);margin:0}

.split{display:grid;grid-template-columns:.82fr 1.18fr;gap:76px;align-items:start}
.sticky{position:sticky;top:100px}
.list{border-top:1px solid var(--ink)}
.list-item{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:27px 0;border-bottom:1px solid var(--line)}
.list-item .n{font:600 24px/1 var(--mono);color:#c7bfae}
.list-item h3{font-size:19px;margin-bottom:7px}
.list-item p{font-size:14px;color:var(--muted);margin:0}

.intent-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:32px}
.intent{background:var(--card);border:1px solid var(--line);padding:24px}
.intent span{display:block;font:600 10px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--clay);margin-bottom:10px}
.intent h3{font-size:19px}
.intent p{font-size:13.5px;color:var(--muted);margin:0}
.intent code,.example-highlight{
  font-family:var(--mono);font-size:11px;background:#fff0a8;
  padding:2px 5px;color:var(--ink);box-decoration-break:clone;-webkit-box-decoration-break:clone
}
.intent .example-line{margin-top:10px;font-size:13px;line-height:1.55;color:var(--muted)}

.evidence-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);margin-top:34px
}
.evidence{background:var(--card);padding:23px}
.evidence span{display:block;font:600 9.5px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--clay);margin-bottom:9px}
.evidence h3{font-size:18px;margin-bottom:8px}
.evidence p{font-size:13px;color:var(--muted);margin:0}
.baseline{
  margin-top:28px;background:var(--forest-soft);border-left:3px solid var(--forest);padding:22px 24px
}
.baseline strong{display:block;font:500 21px/1.3 var(--serif);margin-bottom:7px}
.baseline p{font-size:13.5px;color:#42514a;margin:0}

.layer-table{border-top:1px solid var(--ink);margin-top:30px}
.layer-row{display:grid;grid-template-columns:180px 1fr;gap:30px;padding:24px 0;border-bottom:1px solid var(--line)}
.layer-row b{font:500 22px/1.2 var(--serif)}
.layer-row p{margin:0;color:var(--muted);font-size:14px}

.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.tech{background:var(--card);border:1px solid var(--line);padding:24px}
.tech span{display:block;font:600 10px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--clay);margin-bottom:10px}
.tech h3{font-size:19px}
.tech ul{margin:12px 0 0;padding-left:18px;color:var(--muted)}
.tech li{margin:7px 0;font-size:13.5px}

.dark{background:var(--forest);color:#fff}
.dark h2,.dark h3{color:#fff}
.dark .eyebrow{color:#c9ddd4}
.dark .lede,.dark .muted{color:#d6e0dc}
.dark-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
.dark-card{border:1px solid rgba(255,255,255,.2);padding:24px;background:rgba(255,255,255,.03)}
.dark-card span{display:block;font:600 10px/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:#bdd2c8;margin-bottom:10px}
.dark-card h3{font-size:19px}
.dark-card p{font-size:13.5px;color:#d4dfda;margin:0}

.limit-box{margin-top:32px;background:var(--card);border:1px solid var(--ink);padding:28px}
.limit-box h3{font-size:22px}
.limit-box ul{padding-left:20px;color:var(--muted)}
.limit-box li{margin:8px 0;font-size:14px}
.limit-box .note{margin-top:18px;border-left:2px solid var(--forest);padding-left:16px;font:400 19px/1.45 var(--serif);color:var(--ink)}

.workflow{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--ink);margin-top:34px}
.workflow article{padding:22px 18px 0 0}
.workflow article+article{border-left:1px solid var(--line);padding-left:18px}
.workflow span{display:block;font:11px/1 var(--mono);color:var(--clay);margin-bottom:11px}
.workflow h3{font-size:18px}
.workflow p{font-size:13px;color:var(--muted);margin:0}

.final{padding:72px 0;text-align:center}
.final h2{margin-inline:auto;max-width:720px}
.final p{max-width:620px;margin:0 auto 27px;color:var(--muted)}
.footer{padding:32px 0 42px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;border-top:1px solid var(--line-soft);padding-top:24px}
.footer p,.footer a{font-size:12px;color:var(--muted);text-decoration:none}
.footer nav{display:flex;gap:18px;flex-wrap:wrap}

@media(max-width:900px){
  .hero-grid,.split{grid-template-columns:1fr;gap:36px}
  .sticky{position:static}
  .four-grid,.dark-grid,.workflow{grid-template-columns:1fr 1fr}
  .intent-grid,.tech-grid,.evidence-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .container{width:min(calc(100% - 28px),var(--max))}
  .section{padding:58px 0}
  .hero{padding:44px 0 60px}
  h1{font-size:35px}
  .nav{display:none}
  .four-grid,.dark-grid,.workflow{grid-template-columns:1fr}
  .layer-row{grid-template-columns:1fr;gap:8px}
}

/* Harmonisation avec la direction “chaleureux éditorial” de la homepage */
.method-card,.metric,.intent,.evidence,.tech,.dark-card,.limit-box{border-radius:18px}
.method-card,.intent,.tech,.limit-box{box-shadow:0 16px 48px rgba(42,31,19,.045)}
.four-grid,.evidence-grid{gap:16px;background:transparent;border:0}
.metric,.evidence{border:1px solid var(--line)}
.dark{background:linear-gradient(135deg,#252230 0%,#37304f 100%)}
.baseline{border-left-color:var(--forest);border-radius:0 14px 14px 0}