/* conseillers-ia.fr — système papier / plan de travail */
:root{
  --paper:#f7f3ea; --paper2:#efe9db; --ink:#1b1a17; --muted:#5f5b51; --dim:#8b8578;
  --rule:#d9d2c2; --rule2:#c3b9a5;
  --accent:#b4431f; --blue:#1f3f7a; --accent-soft:rgba(180,67,31,.10);
  --serif:"Instrument Serif",Georgia,serif;
  --sans:"Work Sans",system-ui,-apple-system,sans-serif;
  --maxw:1160px; --sp:clamp(18px,2.4vw,28px);
  --measure:66ch;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17.5px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(rgba(27,26,23,.045) 1px,transparent 1px);
  background-size:22px 22px;}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(180,67,31,.35)}
a:hover{border-bottom-color:var(--accent)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--sp)}

/* top bar */
.top{border-bottom:1px solid var(--rule);background:rgba(247,243,234,.9);backdrop-filter:blur(6px);position:sticky;top:0;z-index:40}
.top .in{display:flex;align-items:center;gap:28px;height:72px}
.wordmark{font-family:var(--serif);font-size:23px;color:var(--ink);border:0;letter-spacing:.01em}
.wordmark span{color:var(--accent);font-style:italic}
.top nav{margin-left:auto;display:flex;gap:24px;font-size:14px}
.top nav a{color:var(--muted);border:0}
.top nav a:hover{color:var(--ink)}
.top nav a[aria-current="page"]{color:var(--ink);border-bottom:1px solid var(--accent)}
.topcta{border:1px solid var(--ink);color:var(--ink);padding:9px 16px;font-size:13.5px;border-radius:2px;transition:background .18s,color .18s}
.topcta:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--rule2);padding:8px 12px;font-family:var(--sans);font-size:13px}

/* hero */
.hero{padding:clamp(48px,8vw,104px) 0 clamp(32px,5vw,56px)}
.eyebrow{font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 18px}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(46px,7.4vw,92px);line-height:1.02;letter-spacing:-.015em;margin:0 0 22px}
h1 em{font-style:italic;color:var(--accent)}
.lead{font-size:clamp(18px,2.1vw,21px);color:var(--muted);max-width:52ch;margin:0 0 30px}
.hero .cta{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.btn{display:inline-block;background:var(--accent);color:#fff8f0;padding:14px 22px;border:1px solid var(--accent);border-radius:2px;font-size:15px;transition:transform .15s,box-shadow .15s;border-bottom:1px solid var(--accent)}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(180,67,31,.2);text-decoration:none}
.btn.alt{background:transparent;color:var(--ink);border-color:var(--rule2)}
.btn.alt:hover{background:var(--paper2);box-shadow:none}
.note{font-size:13.5px;color:var(--dim);margin-top:14px}

/* schéma */
.schema{margin-top:clamp(36px,5vw,64px);border:1px solid var(--rule2);background:var(--paper2);padding:clamp(18px,3vw,30px);position:relative}
.schema .tag{position:absolute;top:-11px;left:18px;background:var(--paper);padding:0 8px;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.schema svg{display:block;width:100%;height:auto}
.schema svg.mob{display:none}
@media (max-width:700px){.schema svg.desk{display:none}.schema svg.mob{display:block}}
.schema path.draw{stroke:var(--accent);stroke-width:1.6;fill:none;stroke-dasharray:var(--len,400);stroke-dashoffset:var(--len,400);transition:stroke-dashoffset 1.4s ease}
.schema.in path.draw{stroke-dashoffset:0}
.schema .lab{font-family:var(--sans);font-size:12px;fill:var(--muted)}
.schema .num{font-family:var(--serif);font-size:19px;fill:var(--ink)}

/* chapitres */
.chapter{padding:clamp(44px,6vw,80px) 0;border-top:1px solid var(--rule)}
.chapter .grid{display:grid;grid-template-columns:180px 1fr;gap:clamp(20px,4vw,56px);align-items:start}
.chapter .side{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);position:sticky;top:96px}
.chapter .side b{display:block;font-family:var(--serif);font-size:34px;letter-spacing:0;text-transform:none;color:var(--accent);font-weight:400;margin-bottom:6px}
.chapter h2{font-family:var(--serif);font-weight:400;font-size:clamp(28px,4vw,42px);line-height:1.12;margin:0 0 18px}
.chapter p{margin:0 0 16px;color:var(--muted);max-width:var(--measure)}
.chapter p strong{color:var(--ink);font-weight:600}
.chapter ul{list-style:none;padding:0;margin:20px 0;max-width:var(--measure)}
.chapter ul li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--muted)}
.chapter ul li::before{content:"—";position:absolute;left:0;color:var(--accent)}

/* pull */
.pull{border-left:2px solid var(--accent);padding:6px 0 6px 20px;margin:28px 0;font-family:var(--serif);font-size:clamp(21px,2.6vw,27px);line-height:1.35;color:var(--ink);max-width:46ch}

/* faq */
.faq{border-top:1px solid var(--rule);padding:clamp(40px,6vw,72px) 0}
.faq h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);margin:0 0 24px;font-weight:400}
details{border-bottom:1px solid var(--rule);padding:16px 0}
summary{cursor:pointer;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px;color:var(--ink)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-size:20px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:12px 0 0;color:var(--muted);max-width:var(--measure)}

/* page header */
.phead{padding:clamp(40px,6vw,76px) 0 clamp(20px,3vw,32px);border-bottom:1px solid var(--rule)}
.phead h1{font-size:clamp(36px,5.6vw,64px);max-width:22ch}
.phead .lead{margin-bottom:0}

/* article avec sommaire */
.article{padding:clamp(28px,4vw,48px) 0 0}
.article .layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:start}
.toc{position:sticky;top:96px;font-size:13.5px;border-left:1px solid var(--rule);padding-left:16px}
.toc .t{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin-bottom:10px}
.toc a{display:block;color:var(--muted);border:0;margin-bottom:8px;line-height:1.4}
.toc a:hover{color:var(--accent)}
.body{max-width:70ch}
.body h2{font-family:var(--serif);font-weight:400;font-size:clamp(24px,3.2vw,33px);line-height:1.15;margin:clamp(30px,4vw,46px) 0 14px;scroll-margin-top:100px}
.body h2:first-child{margin-top:0}
.body p{color:var(--muted);margin:0 0 16px}
.body ul{list-style:none;padding:0;margin:0 0 22px}
.body ul li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--muted)}
.body ul li::before{content:"—";position:absolute;left:0;color:var(--accent)}

/* cta band */
.band{border-top:1px solid var(--rule2);background:var(--paper2);margin-top:clamp(40px,6vw,72px)}
.band .in{display:flex;gap:32px;justify-content:space-between;align-items:center;flex-wrap:wrap;padding:clamp(30px,5vw,52px) 0}
.band h2{font-family:var(--serif);font-weight:400;font-size:clamp(24px,3.2vw,34px);margin:0 0 8px}
.band p{margin:0;color:var(--muted);font-size:15px}

/* footer */
footer.site{border-top:1px solid var(--rule);padding:44px 0 36px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}
footer .col h4{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin:0 0 12px;font-weight:500}
footer .col a{display:block;margin-bottom:8px;color:var(--muted);border:0}
footer .col a:hover{color:var(--ink)}
.copy{margin-top:32px;padding-top:18px;border-top:1px solid var(--rule);font-size:12px;color:var(--dim);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* reveal */
.js .rev{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.js .rev.in{opacity:1;transform:none}

@media (max-width:900px){
  .top nav{display:none}
  .top nav.open{display:flex;position:absolute;top:72px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--rule);flex-direction:column;padding:16px var(--sp);gap:12px}
  .burger{display:block}
  .topcta{display:none}
  .chapter .grid{grid-template-columns:1fr}
  .chapter .side{position:static;display:flex;align-items:baseline;gap:12px}
  .chapter .side b{font-size:26px;margin:0}
  .article .layout{grid-template-columns:1fr}
  .toc{position:static;border-left:0;border-top:1px solid var(--rule);padding:14px 0 0;margin-bottom:24px}
  .toc a{display:inline-block;margin:0 14px 8px 0}
  .fgrid{grid-template-columns:1fr}
  body{font-size:16.5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .js .rev{opacity:1;transform:none}
  .schema path.draw{stroke-dashoffset:0}
}

/* ============ v2 : centrage + mouvement ============ */
.hero{text-align:center}
.hero .eyebrow{text-align:center}
.hero .lead{margin-left:auto;margin-right:auto}
.hero .cta{justify-content:center}
.hero .note{text-align:center}
.hero-inner{position:relative}
#blueprint{position:absolute;inset:-10% -10% 0;width:120%;height:110%;pointer-events:none;z-index:0;opacity:.5}
.hero .wrap{position:relative;z-index:2}
h1 .scribble{position:relative;display:inline-block}
h1 .scribble svg{position:absolute;left:0;right:0;bottom:-.12em;width:100%;height:.28em;overflow:visible}
h1 .scribble path{stroke:var(--accent);stroke-width:3;fill:none;stroke-linecap:round;stroke-dasharray:300;stroke-dashoffset:0}
.js h1 .scribble path{stroke-dashoffset:300}
h1 .scribble.on path{animation:draw 1.4s ease .5s forwards}
@keyframes draw{to{stroke-dashoffset:0}}

.marquee{overflow:hidden;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:var(--paper2);padding:14px 0;margin-top:clamp(30px,5vw,56px)}
.marquee .track{display:flex;gap:38px;white-space:nowrap;width:max-content;animation:slide 40s linear infinite;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim)}
.marquee .track b{color:var(--accent);font-weight:400}
@keyframes slide{to{transform:translateX(-50%)}}

.chapter-head{text-align:center;max-width:820px;margin:0 auto 34px}
.chapter-head h2{text-align:center}
.two-center{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;margin-top:26px}
.two-center p{text-align:left}
.shot{margin:0;border:1px solid var(--rule2);background:var(--paper2);overflow:hidden}
.shot img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;max-height:420px;filter:sepia(.12) saturate(.92);transition:transform .9s ease}
.hero .shot img{aspect-ratio:21/9;max-height:400px}
.shot:hover img{transform:scale(1.03)}
.shot figcaption{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);padding:10px 14px;border-top:1px solid var(--rule)}
.cards-note{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:32px}
.note-card{background:#fffdf7;border:1px solid var(--rule2);padding:22px;box-shadow:4px 4px 0 rgba(27,26,23,.06);transition:transform .25s ease,box-shadow .25s ease}
.note-card:nth-child(odd){transform:rotate(-.6deg)}
.note-card:nth-child(even){transform:rotate(.5deg)}
.note-card:hover{transform:rotate(0) translateY(-4px);box-shadow:6px 8px 0 rgba(27,26,23,.1)}
.note-card .k{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
@media (max-width:900px){.two-center{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.marquee .track{animation:none}}
#progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:90;transition:width .1s linear}
.nav-cta{display:none}
@media (max-width:900px){.nav-cta{display:inline-block;text-align:center;margin-top:6px;border-bottom:1px solid var(--accent)}}
#blueprint{opacity:.75}
.note,.shot figcaption{color:var(--muted);font-size:12.5px}
.marquee .track{font-size:13.5px;color:var(--muted)}
.marquee:hover .track{animation-play-state:paused}
.shot:hover img{transform:scale(1.05) rotate(.3deg)}
.schema{margin-top:34px}
.schema{background:#fffdf7;border:1px solid var(--rule2);box-shadow:5px 5px 0 rgba(27,26,23,.05)}
.schema .lab{fill:#4a463d}
.schema .num{fill:var(--accent)}
.schema svg text{font-size:13px}
.schema .tag{background:#fffdf7;color:#4a463d}
h1 .scribble path{stroke-width:4}
h1 .scribble path{vector-effect:non-scaling-stroke;stroke-width:3.5}
.schema path.draw{vector-effect:non-scaling-stroke;stroke-width:2}
h1 .scribble{position:relative;display:inline-block;padding-bottom:.02em}
h1 .scribble::after{content:"";position:absolute;left:-2%;right:-2%;bottom:-.06em;height:.10em;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 20' preserveAspectRatio='none'%3E%3Cpath d='M3 14 C40 5 70 17 100 9 C130 2 165 13 197 6' fill='none' stroke='%23b4431f' stroke-width='6' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center/100% 100%}

/* ===== v3 : correctifs menu + débordement ===== */
html,body{overflow-x:clip}
.hero{overflow:clip}
.top nav a.btn{color:#fff8f0;border-bottom:0}
@media (max-width:900px){
  .top nav.open{z-index:70;box-shadow:0 24px 48px rgba(27,26,23,.18);max-height:calc(100dvh - 72px);overflow:auto;border-top:1px solid var(--rule)}
  .top nav a{padding:9px 0;border-bottom:1px solid var(--rule)}
  .top nav a[aria-current="page"]{border-bottom:1px solid var(--rule)}
  body.menu-open{overflow:hidden}
  .burger{z-index:80;position:relative}
  .burger[aria-expanded="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
}

/* ===== v3 : pages intérieures ===== */
.phead{text-align:center}
.phead h1{margin-left:auto;margin-right:auto}
.meta{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-top:16px}
.toc a span{font-family:var(--serif);color:var(--accent);margin-right:8px;font-size:12px}
.brief{background:#fffdf7;border:1px solid var(--rule2);border-left:3px solid var(--accent);padding:20px 22px;margin-bottom:34px;box-shadow:4px 4px 0 rgba(27,26,23,.05)}
.brief .bl{display:block;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.brief ul{list-style:none;margin:0;padding:0}
.brief li{position:relative;padding-left:18px;margin-bottom:8px;color:var(--ink)}
.brief li::before{content:"—";position:absolute;left:0;color:var(--accent)}
.blk{margin-bottom:clamp(28px,4vw,44px)}
.blk h2{display:flex;align-items:baseline;gap:10px}
.blk h2 .hn{font-family:var(--sans);font-size:11px;letter-spacing:.14em;color:var(--accent)}
.relbox{margin-top:52px;border-top:1px solid var(--rule);padding-top:24px}
.relbox .t{font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim);margin-bottom:14px}
.rgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.rcard{display:block;background:#fffdf7;border:1px solid var(--rule2);padding:18px;box-shadow:3px 3px 0 rgba(27,26,23,.05);transition:transform .2s,box-shadow .2s}
.rcard:hover{transform:translateY(-3px);box-shadow:5px 6px 0 rgba(27,26,23,.09)}
.rcard .rk{font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
.rcard h3{font-family:var(--serif);font-weight:400;font-size:19px;margin:8px 0 10px;line-height:1.15}
.rcard .ra{font-size:12px;color:var(--muted)}
@media (max-width:900px){.phead{text-align:center}}
.article .layout{grid-template-columns:196px minmax(0,1fr);gap:clamp(20px,3vw,40px)}
.blk{padding-top:24px;border-top:1px solid var(--rule)}
.blk:first-of-type{border-top:0;padding-top:0}
.pull{font-family:var(--serif);font-size:clamp(22px,2.8vw,30px);line-height:1.3;color:var(--ink);
  border-left:2px solid var(--accent);padding:4px 0 4px 20px;margin:30px 0 34px;max-width:34ch}
.phead{position:relative;overflow:clip}
.phead .wrap{position:relative;z-index:2}
.phead #blueprint{position:absolute;inset:-30% -10% 0;width:120%;height:160%;opacity:.55}
.phead{padding-top:clamp(30px,4vw,56px);padding-bottom:clamp(10px,1.6vw,18px)}
.article .layout{padding-top:clamp(16px,2.4vw,26px)}
.blk{margin-bottom:clamp(18px,2.4vw,28px);padding-top:20px}
.pull{margin:24px 0 28px}
.wordmark span{color:var(--accent);font-style:normal;padding:0 .06em;font-size:1.1em;position:relative;top:-.04em}

/* ===== v4 mobile ===== */
@media (max-width:900px){
  footer a, .rgrid .rcard, .toc a{min-height:0}
  footer a{padding:9px 0;display:inline-block;font-size:14px}
  .rcard h3{font-size:17px}
  details summary{min-height:44px;display:flex;align-items:center}
  .wordmark{padding:8px 0}
  .toc a{min-height:40px;display:inline-flex;align-items:center}
  img{height:auto}
}
@media (max-width:900px){
  .article .layout{grid-template-columns:minmax(0,1fr) !important}
  .article .body{max-width:100%;min-width:0}
  .toc a{height:auto;min-height:0}
  .blk{min-width:0}
}
@media (max-width:900px){ .toc a{height:auto;min-height:26px;padding:4px 0} }