/* ============================================================
   Marlingtonia — Conseil en Intelligence Artificielle
   Direction : surfaces de marbre sculpté, couloirs de données
   lumineux, intelligence institutionnelle.
   ============================================================ */

:root{
  --obsidian:#161b26;
  --slate:#1f2634;
  --slate-soft:#28303f;
  --ivory:#f4f0e8;
  --ivory-dim:#e6dfd2;
  --bronze:#b8893f;
  --bronze-light:#d8b277;
  --bronze-glow:#e6c48f;
  --line:rgba(216,178,119,.22);
  --text:#2a2f3a;
  --text-dim:#6b6f78;
  --muted:#9aa0aa;
  --serif:"Cormorant Garamond",Georgia,"Times New Roman",serif;
  --sans:"Hanken Grotesk","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --maxw:1180px;
  --r:4px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  color:var(--text);
  background:var(--ivory);
  line-height:1.65;
  font-size:17px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- Typographic system ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.08;letter-spacing:-.01em;color:var(--obsidian)}
h1{font-size:clamp(2.6rem,6vw,4.7rem)}
h2{font-size:clamp(2rem,4vw,3.2rem)}
h3{font-size:1.5rem}
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--bronze);
  display:inline-block;
}
.lead{font-size:1.18rem;color:var(--text-dim);max-width:60ch}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--sans);font-weight:600;font-size:.92rem;
  letter-spacing:.02em;
  padding:15px 30px;border-radius:var(--r);
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--bronze) 0%,var(--bronze-light) 100%);
  color:var(--obsidian);
  box-shadow:0 6px 24px rgba(184,137,63,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(184,137,63,.4)}
.btn-ghost{border-color:var(--line);color:var(--obsidian);background:transparent}
.btn-ghost:hover{border-color:var(--bronze);color:var(--bronze)}
.btn-light{background:var(--ivory);color:var(--obsidian)}
.btn-light:hover{transform:translateY(-2px)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(22,27,38,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(216,178,119,.16);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ivory)}
.brand svg{width:34px;height:34px}
.brand .name{font-family:var(--serif);font-size:1.45rem;font-weight:600;letter-spacing:.01em}
.brand .name span{color:var(--bronze-light)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{color:var(--ivory-dim);font-size:.9rem;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--bronze-light)}
.nav-cta{padding:11px 22px;font-size:.85rem}
.nav-toggle{display:none;background:none;border:none;color:var(--ivory);cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--bronze-light);display:block;transition:.3s}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:
    linear-gradient(180deg,rgba(22,27,38,.92) 0%,rgba(31,38,52,.86) 100%),
    url("https://images.unsplash.com/photo-1600607687939-ce8a6c25118c?auto=format&fit=crop&w=1920&q=70") center/cover;
  color:var(--ivory);
  padding:120px 0 130px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(1px 1px at 20% 30%,rgba(230,196,143,.5),transparent),
    radial-gradient(1px 1px at 70% 60%,rgba(230,196,143,.4),transparent),
    radial-gradient(1px 1px at 45% 80%,rgba(230,196,143,.3),transparent);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;position:relative;z-index:2}
.hero h1{color:var(--ivory);margin:18px 0 22px}
.hero h1 em{font-style:italic;color:var(--bronze-light)}
.hero .lead{color:var(--ivory-dim)}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:48px;flex-wrap:wrap}
.hero-stat .num{font-family:var(--serif);font-size:2.2rem;color:var(--bronze-light);line-height:1}
.hero-stat .lab{font-size:.78rem;color:var(--muted);letter-spacing:.06em;margin-top:6px}

/* luminous data corridor panel */
.corridor{
  position:relative;border:1px solid rgba(216,178,119,.3);border-radius:8px;
  background:linear-gradient(160deg,rgba(40,48,63,.85),rgba(22,27,38,.6));
  padding:30px;overflow:hidden;
}
.corridor::before{
  content:"";position:absolute;left:-40%;top:0;width:40%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(230,196,143,.18),transparent);
  animation:sweep 6s linear infinite;
}
@keyframes sweep{to{left:140%}}
.corridor .ctitle{font-family:var(--mono);font-size:.7rem;letter-spacing:.22em;color:var(--bronze-light);text-transform:uppercase}
.bar{height:8px;border-radius:6px;background:rgba(216,178,119,.14);margin:18px 0 6px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--bronze),var(--bronze-glow))}
.bar-row span{font-size:.8rem;color:var(--ivory-dim);display:flex;justify-content:space-between}

/* ---------- Section frame ---------- */
section{padding:96px 0}
.section-head{max-width:64ch;margin-bottom:54px}
.section-head h2{margin:14px 0 16px}

/* ---------- Trust strip ---------- */
.trust{background:var(--slate);color:var(--ivory-dim);padding:30px 0}
.trust .wrap{display:flex;flex-wrap:wrap;gap:18px 46px;align-items:center;justify-content:center}
.trust span{font-family:var(--mono);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.trust .dot{color:var(--bronze)}

/* ---------- Services ---------- */
.services{background:var(--ivory)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{
  background:#fff;border:1px solid #e9e2d4;border-radius:8px;padding:34px 30px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s;
  position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--bronze),var(--bronze-glow));transition:width .35s}
.card:hover{transform:translateY(-5px);box-shadow:0 18px 40px rgba(22,27,38,.1);border-color:var(--line)}
.card:hover::before{width:100%}
.card .idx{font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;color:var(--bronze)}
.card h3{margin:14px 0 12px}
.card p{color:var(--text-dim);font-size:.97rem}
.card ul{list-style:none;margin-top:16px}
.card li{font-size:.9rem;color:var(--text);padding-left:20px;position:relative;margin-bottom:8px}
.card li::before{content:"—";position:absolute;left:0;color:var(--bronze)}

/* ---------- Method (data corridor steps) ---------- */
.method{background:var(--obsidian);color:var(--ivory)}
.method h2{color:var(--ivory)}
.method .lead{color:var(--ivory-dim)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(216,178,119,.18);border:1px solid rgba(216,178,119,.18);border-radius:8px;overflow:hidden;margin-top:46px}
.step{background:var(--slate);padding:34px 26px;transition:background .3s}
.step:hover{background:var(--slate-soft)}
.step .n{font-family:var(--serif);font-size:2.6rem;color:var(--bronze-light);line-height:1}
.step h3{color:var(--ivory);font-size:1.18rem;margin:14px 0 10px}
.step p{color:var(--muted);font-size:.9rem}

/* ---------- Showcase split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split .media{border-radius:10px;overflow:hidden;border:1px solid var(--line);box-shadow:0 20px 50px rgba(22,27,38,.16)}
.split .media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split ul{list-style:none;margin-top:22px}
.split li{padding:14px 0;border-bottom:1px solid #e6dfd0;display:flex;gap:14px;align-items:flex-start}
.split li b{font-family:var(--serif);color:var(--bronze);font-size:1.2rem;min-width:34px}
.split li .t{font-size:.97rem;color:var(--text-dim)}
.split li .t strong{color:var(--text);display:block;font-family:var(--sans);font-size:1rem}

/* ---------- Pricing ---------- */
.pricing{background:var(--ivory-dim)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch}
.plan{
  background:#fff;border:1px solid #e3dccd;border-radius:10px;padding:38px 32px;
  display:flex;flex-direction:column;position:relative;transition:transform .3s,box-shadow .3s;
}
.plan:hover{transform:translateY(-6px);box-shadow:0 22px 50px rgba(22,27,38,.12)}
.plan.feature{border:1px solid var(--bronze);box-shadow:0 16px 44px rgba(184,137,63,.2)}
.plan.feature .tag{
  position:absolute;top:-13px;left:32px;background:linear-gradient(135deg,var(--bronze),var(--bronze-light));
  color:var(--obsidian);font-family:var(--mono);font-size:.66rem;letter-spacing:.18em;
  text-transform:uppercase;padding:6px 14px;border-radius:4px;font-weight:600;
}
.plan .pname{font-family:var(--serif);font-size:1.65rem;color:var(--obsidian)}
.plan .pdesc{font-size:.9rem;color:var(--text-dim);margin:8px 0 22px;min-height:48px}
.plan .amount{font-family:var(--serif);font-size:2.9rem;color:var(--obsidian);line-height:1}
.plan .amount small{font-family:var(--sans);font-size:.9rem;color:var(--text-dim);font-weight:500}
.plan .per{font-size:.82rem;color:var(--muted);margin-bottom:24px}
.plan ul{list-style:none;margin-bottom:28px;flex:1}
.plan li{font-size:.92rem;padding:9px 0 9px 26px;position:relative;border-bottom:1px dashed #ece5d6;color:var(--text)}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--bronze);font-weight:700}
.plan .btn{width:100%;justify-content:center}
.price-note{text-align:center;margin-top:34px;font-size:.9rem;color:var(--text-dim)}
.price-note a{color:var(--bronze);border-bottom:1px solid var(--line)}

/* ---------- Contact ---------- */
.contact{background:var(--obsidian);color:var(--ivory)}
.contact h2{color:var(--ivory)}
.contact .lead{color:var(--ivory-dim)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;margin-top:46px}
.info-block{margin-bottom:26px}
.info-block .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze-light)}
.info-block .v{font-size:1.05rem;color:var(--ivory);margin-top:6px}
.info-block .v a:hover{color:var(--bronze-light)}
form{display:grid;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.82rem;color:var(--ivory-dim);letter-spacing:.03em}
.field input,.field select,.field textarea{
  background:rgba(40,48,63,.7);border:1px solid rgba(216,178,119,.22);border-radius:var(--r);
  padding:13px 15px;color:var(--ivory);font-family:var(--sans);font-size:.95rem;transition:border-color .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--bronze-light)}
.field textarea{resize:vertical;min-height:120px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.84rem;color:var(--muted)}
.check input{margin-top:3px;accent-color:var(--bronze)}
.check a{color:var(--bronze-light);border-bottom:1px solid var(--line)}
.form-status{font-size:.9rem;padding:12px 0;display:none}
.form-status.show{display:block}
.form-status.ok{color:var(--bronze-glow)}

/* ---------- FAQ ---------- */
.faq{background:var(--ivory)}
.acc{border-top:1px solid #e3dccd}
.acc-item{border-bottom:1px solid #e3dccd}
.acc-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;
  padding:24px 0;font-family:var(--serif);font-size:1.3rem;color:var(--obsidian);
  display:flex;justify-content:space-between;align-items:center;gap:18px}
.acc-q .pm{color:var(--bronze);font-size:1.6rem;transition:transform .3s;flex-shrink:0}
.acc-q[aria-expanded="true"] .pm{transform:rotate(45deg)}
.acc-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.acc-a p{padding:0 0 24px;color:var(--text-dim);font-size:1rem;max-width:80ch}

/* ---------- Footer ---------- */
.site-footer{background:var(--slate);color:var(--ivory-dim);padding:64px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.foot-brand .brand{margin-bottom:16px}
.foot-brand p{font-size:.9rem;color:var(--muted);max-width:34ch}
.foot-col h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze-light);margin-bottom:16px}
.foot-col a,.foot-col span{display:block;font-size:.9rem;color:var(--ivory-dim);margin-bottom:11px;transition:color .2s}
.foot-col a:hover{color:var(--bronze-light)}
.foot-bottom{margin-top:48px;padding-top:24px;border-top:1px solid rgba(216,178,119,.16);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:.8rem;color:var(--muted)}

/* ---------- Cookie consent ---------- */
.cookie{
  position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(160%);
  width:min(960px,calc(100% - 32px));z-index:90;
  background:rgba(22,27,38,.97);border:1px solid rgba(216,178,119,.3);border-radius:10px;
  padding:22px 26px;color:var(--ivory-dim);
  display:flex;gap:22px;align-items:center;flex-wrap:wrap;justify-content:space-between;
  box-shadow:0 20px 60px rgba(0,0,0,.4);transition:transform .5s cubic-bezier(.2,.8,.2,1);
}
.cookie.show{transform:translateX(-50%) translateY(0)}
.cookie p{font-size:.88rem;flex:1;min-width:260px}
.cookie a{color:var(--bronze-light);border-bottom:1px solid var(--line)}
.cookie-actions{display:flex;gap:12px;flex-wrap:wrap}
.cookie .btn{padding:11px 22px;font-size:.84rem}

/* ---------- Legal pages ---------- */
.legal-hero{background:var(--obsidian);color:var(--ivory);padding:70px 0 50px}
.legal-hero h1{color:var(--ivory);font-size:clamp(2.2rem,5vw,3.4rem)}
.legal-hero p{color:var(--muted);margin-top:12px;font-family:var(--mono);font-size:.8rem;letter-spacing:.1em}
.legal-body{padding:64px 0 90px;max-width:820px}
.legal-body h2{font-size:1.7rem;margin:42px 0 14px}
.legal-body h3{font-size:1.2rem;margin:26px 0 10px;font-family:var(--sans);font-weight:700;color:var(--obsidian)}
.legal-body p,.legal-body li{color:var(--text-dim);margin-bottom:14px}
.legal-body ul{padding-left:22px;margin-bottom:16px}
.legal-body li{margin-bottom:8px}
.legal-body a{color:var(--bronze);border-bottom:1px solid var(--line)}
.legal-toc{background:#fff;border:1px solid #e6dfd0;border-radius:8px;padding:24px 28px;margin-bottom:40px}
.legal-toc h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--bronze);margin-bottom:14px}
.legal-toc a{display:block;margin-bottom:8px;font-size:.92rem}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr;gap:40px}
  .grid-3,.price-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{
    position:absolute;top:74px;left:0;right:0;background:rgba(22,27,38,.98);
    flex-direction:column;align-items:flex-start;gap:0;padding:0 28px;
    max-height:0;overflow:hidden;transition:max-height .35s;border-bottom:1px solid rgba(216,178,119,.16);
  }
  .nav-links.open{max-height:420px;padding:18px 28px}
  .nav-links a{padding:11px 0;width:100%}
  .nav-toggle{display:flex}
  .nav-cta{margin-top:8px}
}
@media(max-width:560px){
  body{font-size:16px}
  section{padding:64px 0}
  .steps{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero{padding:80px 0 90px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important;transition:none!important}
}