/* ============================================================
   PARCOURS IA — Design system
   Encre sapin · Ivoire · Safran — Fraunces / Public Sans / Plex Mono
   ============================================================ */

:root{
  --sapin:#0E2B25;
  --sapin-2:#153A32;
  --sapin-3:#1C4A40;
  --ivoire:#F7F5EE;
  --ivoire-2:#ECE8DC;
  --ivoire-3:#E0DBCB;
  --safran:#C4862A;
  --safran-clair:#DFA84E;
  --safran-pale:#F3E2C2;
  --encre-txt:#12211D;
  --gris:#51605A;
  --gris-clair:#8B9691;
  --blanc:#FFFFFF;
  --max:1140px;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-soft:0 2px 8px -2px rgba(14,43,37,.08), 0 12px 32px -12px rgba(14,43,37,.14);
  --shadow-lift:0 4px 12px -2px rgba(14,43,37,.1), 0 24px 56px -16px rgba(14,43,37,.22);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  font-family:'Public Sans',system-ui,sans-serif;
  background:var(--ivoire);
  color:var(--encre-txt);
  line-height:1.65;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* Grain subtil sur tout le site */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
  opacity:.35;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.03 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap{max-width:var(--max);margin:0 auto;padding:0 30px;position:relative;z-index:2}

::selection{background:var(--safran-pale);color:var(--sapin)}

h1,h2,h3,h4{
  font-family:'Fraunces',serif;
  font-weight:560;line-height:1.12;
  letter-spacing:-0.015em;
  font-variation-settings:"opsz" 60;
}
a{color:inherit}
:focus-visible{outline:2px solid var(--safran);outline-offset:3px;border-radius:3px}

/* ---------- Utilitaires typographiques ---------- */
.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--safran);font-weight:500;
  display:flex;align-items:center;gap:14px;
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--safran)}
.eyebrow.center{justify-content:center}
.eyebrow.center::after{content:"";width:30px;height:1px;background:var(--safran)}

.lead{font-size:19px;color:var(--gris);line-height:1.6}

/* ---------- Boutons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  background:var(--sapin);color:var(--ivoire);
  text-decoration:none;font-weight:600;font-size:15.5px;
  padding:15px 30px;border-radius:var(--r-sm);
  border:1px solid var(--sapin);cursor:pointer;
  font-family:'Public Sans',sans-serif;
  transition:background .25s var(--ease),color .25s var(--ease),transform .2s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{background:var(--sapin-2);border-color:var(--sapin-2);transform:translateY(-1px);box-shadow:var(--shadow-soft)}
.btn:active{transform:translateY(0)}
.btn .arr{transition:transform .25s var(--ease);font-family:'IBM Plex Mono',monospace}
.btn:hover .arr{transform:translateX(4px)}

.btn-or{background:var(--safran);border-color:var(--safran);color:var(--blanc)}
.btn-or:hover{background:#B37822;border-color:#B37822}
.btn-ghost{background:transparent;color:var(--sapin);border-color:rgba(14,43,37,.35)}
.btn-ghost:hover{background:var(--sapin);color:var(--ivoire);border-color:var(--sapin)}
.btn-ivoire{background:var(--ivoire);border-color:var(--ivoire);color:var(--sapin)}
.btn-ivoire:hover{background:transparent;color:var(--ivoire)}

/* ---------- Navigation ---------- */
nav.site{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,238,.9);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--ivoire-2);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{
  font-family:'Fraunces',serif;font-size:21px;font-weight:640;
  text-decoration:none;display:flex;align-items:baseline;gap:7px;letter-spacing:-.01em;
}
.logo .ia{
  font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:500;
  letter-spacing:.08em;color:var(--blanc);background:var(--safran);
  padding:3px 7px;border-radius:4px;transform:translateY(-7px);
}
.nav-links{display:flex;gap:34px;align-items:center;list-style:none}
.nav-links a{
  text-decoration:none;font-size:14.5px;font-weight:500;color:var(--gris);
  position:relative;padding:4px 0;transition:color .2s;
}
.nav-links a:not(.btn)::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:0;
  background:var(--safran);transition:width .3s var(--ease);
}
.nav-links a:not(.btn):hover{color:var(--sapin)}
.nav-links a:not(.btn):hover::after{width:100%}
.nav-links a.active{color:var(--sapin)}
.nav-links a.active::after{width:100%}
.nav-cta{padding:11px 22px;font-size:14px}
.burger{display:none;background:none;border:none;cursor:pointer;padding:10px}
.burger span{display:block;width:23px;height:2px;background:var(--sapin);margin:5px 0;transition:transform .3s,opacity .3s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero pages intérieures ---------- */
.page-hero{padding:84px 0 60px;position:relative}
.page-hero h1{font-size:clamp(34px,4.4vw,52px);margin:20px 0 18px;max-width:720px}
.page-hero .lead{max-width:600px}
.page-hero h1 .accent{color:var(--safran)}

/* ---------- Sections ---------- */
.sec{padding:96px 0}
.sec-tight{padding:72px 0}
.sec-dark{background:var(--sapin);color:var(--ivoire)}
.sec-dark .eyebrow{color:var(--safran-clair)}
.sec-dark .eyebrow::before,.sec-dark .eyebrow.center::after{background:var(--safran-clair)}
.sec-dark .lead{color:#A7B8B1}
.sec-alt{background:var(--ivoire-2)}
.sec-head{max-width:660px;margin-bottom:56px}
.sec-head h2{font-size:clamp(28px,3.4vw,42px);margin:18px 0 16px}
.sec-head p{color:var(--gris);font-size:17px}
.sec-dark .sec-head p{color:#A7B8B1}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- Cartes offre ---------- */
.offres-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.offre{
  background:var(--blanc);border:1px solid var(--ivoire-2);
  border-radius:var(--r-lg);padding:38px 32px;display:flex;flex-direction:column;
  position:relative;overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.offre::before{
  content:"";position:absolute;top:0;left:32px;right:32px;height:1px;
  background:linear-gradient(90deg,transparent,var(--ivoire-3),transparent);
}
.offre:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift)}
.offre.phare{border-top:3px solid var(--safran)}
.offre.phare::after{
  content:"Recommandé";position:absolute;top:18px;right:-34px;
  background:var(--safran);color:var(--blanc);
  font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  padding:5px 40px;transform:rotate(45deg);
}
.offre .tag{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gris-clair);margin-bottom:16px;font-weight:500}
.offre.phare .tag{color:var(--safran)}
.offre h3{font-size:23px;margin-bottom:4px}
.prix{font-family:'Fraunces',serif;font-size:32px;font-weight:640;margin:12px 0 2px;letter-spacing:-.02em}
.prix small{font-family:'Public Sans',sans-serif;font-size:13.5px;font-weight:400;color:var(--gris);letter-spacing:0}
.offre p.desc{font-size:15px;color:var(--gris);margin:10px 0 22px}
.offre ul{list-style:none;margin:0 0 28px;flex:1}
.offre li{
  font-size:14.5px;padding:9px 0 9px 26px;position:relative;
  border-top:1px solid var(--ivoire-2);
}
.offre li::before{
  content:"";position:absolute;left:2px;top:16px;width:7px;height:7px;
  background:var(--safran);border-radius:1px;transform:rotate(45deg);
}
.offre .btn{width:100%}

/* ---------- Étapes / méthode ---------- */
.etapes{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.etape{position:relative;padding-top:24px}
.etape::before{
  content:"";position:absolute;top:0;left:0;right:-28px;height:2px;
  background:repeating-linear-gradient(90deg,var(--safran) 0 7px,transparent 7px 15px);
  opacity:.55;
}
.etape:last-child::before{right:0}
.etape .num{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--safran);letter-spacing:.12em;font-weight:500}
.etape h3{font-size:19px;margin:10px 0 8px}
.etape p{font-size:14.5px;color:var(--gris)}
.sec-dark .etape p{color:#A7B8B1}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin:0 auto}
.faq details{
  border-bottom:1px solid var(--ivoire-3);
  transition:background .2s;
}
.faq summary{
  cursor:pointer;list-style:none;
  font-family:'Fraunces',serif;font-size:19px;font-weight:560;
  padding:24px 44px 24px 4px;position:relative;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:'IBM Plex Mono',monospace;font-size:22px;color:var(--safran);
  transition:transform .3s var(--ease);
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq .faq-body{padding:0 4px 26px;color:var(--gris);font-size:15.5px;max-width:640px}

/* ---------- Encadré sombre (citation / carte) ---------- */
.card-dark{
  background:var(--sapin);color:var(--ivoire);border-radius:var(--r-lg);
  padding:44px 40px;position:relative;overflow:hidden;
}
.card-dark::after{
  content:"";position:absolute;inset:11px;border:1px solid rgba(223,168,78,.35);
  border-radius:calc(var(--r-lg) - 8px);pointer-events:none;
}
.card-dark .big{font-family:'Fraunces',serif;font-size:25px;line-height:1.32;font-weight:560}
.card-dark .big em{font-style:italic;color:var(--safran-clair)}

/* ---------- Stats ---------- */
.stats{display:flex;gap:38px;flex-wrap:wrap}
.stat .n{font-family:'Fraunces',serif;font-size:34px;font-weight:640;color:var(--safran-clair)}
.stat .l{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:#A7B8B1;margin-top:3px;line-height:1.6}

/* ---------- Bandeau CTA ---------- */
.cta-band{
  background:var(--sapin);color:var(--ivoire);
  border-radius:var(--r-lg);padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;
  border:2px dashed rgba(223,168,78,.28);border-radius:50%;
}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);max-width:480px}
.cta-band p{color:#A7B8B1;font-size:15.5px;margin-top:10px;max-width:460px}
.cta-band .btn{flex-shrink:0;position:relative;z-index:1}

/* ---------- Formulaires ---------- */
.form{display:grid;gap:16px}
.form label{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--gris);font-weight:500;
  display:block;margin-bottom:7px;
}
.form input,.form textarea,.form select{
  width:100%;background:var(--blanc);border:1px solid var(--ivoire-3);
  border-radius:var(--r-sm);color:var(--encre-txt);
  padding:14px 16px;font-family:'Public Sans',sans-serif;font-size:15.5px;
  transition:border-color .2s,box-shadow .2s;
}
.form input:focus,.form textarea:focus,.form select:focus{
  outline:none;border-color:var(--safran);
  box-shadow:0 0 0 3px rgba(196,134,42,.15);
}
.form textarea{min-height:130px;resize:vertical}
.form-msg{font-size:14px;color:var(--safran);min-height:20px}

/* ---------- Footer ---------- */
footer.site{background:#0A2019;color:#7E948C;padding:56px 0 34px;font-size:14px}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px;margin-bottom:44px}
.ft-grid .logo{color:var(--ivoire);font-size:19px;margin-bottom:14px}
.ft-grid p{max-width:300px;font-size:13.5px}
.ft-col h4{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--safran-clair);font-weight:500;margin-bottom:16px}
.ft-col ul{list-style:none}
.ft-col li{margin-bottom:10px}
.ft-col a{text-decoration:none;color:#A7B8B1;transition:color .2s}
.ft-col a:hover{color:var(--ivoire)}
.ft-base{border-top:1px solid rgba(247,245,238,.1);padding-top:26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px}

/* ---------- Reveal on scroll ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.on{opacity:1;transform:none}
.rv-d1{transition-delay:.08s}
.rv-d2{transition-delay:.16s}
.rv-d3{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- Parcours SVG signature ---------- */
.p-path{
  fill:none;stroke:var(--safran);stroke-width:2;
  stroke-dasharray:6 7;
  animation:flow 22s linear infinite;
}
@keyframes flow{to{stroke-dashoffset:-520}}
.p-node circle{fill:var(--ivoire);stroke:var(--sapin);stroke-width:2}
.p-node.final circle{fill:var(--safran);stroke:var(--safran)}
.p-label{font-family:'IBM Plex Mono',monospace;font-size:11.5px;fill:var(--gris);letter-spacing:.06em}
.p-label.strong{fill:var(--sapin);font-weight:500}
@media (prefers-reduced-motion:reduce){.p-path{animation:none}}

/* ---------- Grille 2 colonnes générique ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.grid-2 h2{font-size:clamp(26px,3vw,38px);margin:18px 0}
.grid-2 p{color:var(--gris);margin-bottom:16px}
.sec-dark .grid-2 p{color:#A7B8B1}

/* ---------- Liste points forts ---------- */
.points{list-style:none;margin-top:8px}
.points li{padding:18px 0;border-top:1px solid rgba(14,43,37,.12)}
.sec-dark .points li{border-color:rgba(247,245,238,.14)}
.points li strong{display:block;font-size:16.5px;margin-bottom:4px;font-family:'Fraunces',serif;font-weight:560}
.points li span{font-size:14.5px;color:var(--gris)}
.sec-dark .points li span{color:#A7B8B1}

/* ---------- Modules formation ---------- */
.modules{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.module{
  background:var(--blanc);border:1px solid var(--ivoire-2);border-radius:var(--r-md);
  padding:26px 26px 24px;transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.module:hover{transform:translateY(-3px);box-shadow:var(--shadow-soft)}
.module .m-num{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--safran);letter-spacing:.12em;font-weight:500}
.module h3{font-size:18px;margin:8px 0 6px}
.module p{font-size:14px;color:var(--gris)}

/* ---------- Tableau comparatif ---------- */
.tbl{width:100%;border-collapse:collapse;background:var(--blanc);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-soft)}
.tbl th,.tbl td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--ivoire-2)}
.tbl th{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--gris);font-weight:500;background:var(--ivoire-2)}
.tbl td:first-child{font-weight:600}
.tbl .oui{color:var(--safran);font-weight:700}
.tbl tr:last-child td{border-bottom:none}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .grid-2{grid-template-columns:1fr;gap:44px}
  .offres-grid{grid-template-columns:1fr}
  .etapes{grid-template-columns:1fr 1fr;gap:36px}
  .etape::before{right:0}
  .modules{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px}
  .nav-links{
    display:none;position:absolute;top:72px;left:0;right:0;
    background:var(--ivoire);flex-direction:column;align-items:flex-start;
    padding:24px 30px;gap:20px;border-bottom:1px solid var(--ivoire-2);
    box-shadow:var(--shadow-soft);
  }
  .nav-links.open{display:flex}
  .burger{display:block}
}
@media (max-width:560px){
  body{font-size:16px}
  .etapes{grid-template-columns:1fr}
  .sec{padding:72px 0}
  .card-dark{padding:34px 28px}
}