/* ============================================================
   EXTRALYS : design system
   Charte : noir profond + or (héritée de l'app d'extraction, raffinée)
   Or principal #D4AF37, or clair #E8C84A, dégradé #BF953F / #FCF6BA / #AA771C
   Polices : Playfair Display (titres) + Inter (texte), self-hostées
   Thème unique : sombre (le noir et or EST la marque)
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  --bg:#0A0908;
  --bg-2:#0E0C0A;
  --surface:#141110;
  --surface-2:#1A1613;
  --surface-3:#221D17;
  --line:rgba(212,175,55,.10);
  --line-2:rgba(212,175,55,.24);
  --line-soft:rgba(255,255,255,.07);

  --fg:#F4F0E4;
  --fg-soft:#B4AC9C;
  --fg-dim:#7C7466;

  --gold:#D4AF37;
  --gold-bright:#E8C84A;
  --gold-pale:#FCF6BA;
  --gold-deep:#8C6D1F;
  --accent:var(--gold);
  --accent-bright:var(--gold-bright);
  --on-accent:#181203;

  --glow:rgba(212,175,55,.30);
  --grid-line:rgba(212,175,55,.05);
  --gold-grad:linear-gradient(105deg,#BF953F 0%,#FCF6BA 40%,#D4AF37 62%,#AA771C 100%);

  --card-grad-a:rgba(252,246,186,.045);
  --card-grad-b:rgba(252,246,186,.012);
  --hero-bg:radial-gradient(680px 440px at 80% -5%,rgba(212,175,55,.13),transparent 66%),
            radial-gradient(760px 540px at 4% 8%,rgba(191,149,63,.08),transparent 62%),
            radial-gradient(900px 760px at 50% 112%,rgba(212,175,55,.07),transparent 70%);
  --shadow:0 1px 2px rgba(0,0,0,.5),0 20px 50px -24px rgba(0,0,0,.8);
  --shadow-lg:0 2px 6px rgba(0,0,0,.55),0 40px 90px -32px rgba(0,0,0,.85);
  color-scheme:dark;

  --r-sm:10px;--r:14px;--r-lg:20px;--r-xl:24px;--r-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,.84,.44,1);
}

/* ---------- Base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--fg);
  line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
}
/* grain subtil : signature premium, uniquement sur l'arriere-plan */
body::after{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;mix-blend-mode:soft-light;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:180px 180px}
/* couches d'ambiance : halo or + trame fine + canvas animé (js/background.js) */
.bg-ambient{position:fixed;inset:0;z-index:-3;pointer-events:none;background:var(--hero-bg);opacity:.9}
.bg-grid{position:fixed;inset:0;z-index:-3;pointer-events:none;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:68px 68px;mask-image:radial-gradient(ellipse 100% 80% at 50% 0%,#000 20%,transparent 78%)}
#fx-canvas{position:fixed;inset:0;z-index:-2;pointer-events:none;width:100%;height:100%}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent-bright);outline-offset:3px;border-radius:6px}
.skip-link{position:fixed;top:-64px;left:16px;z-index:3000;background:var(--accent);color:var(--on-accent);
  padding:11px 18px;border-radius:0 0 12px 12px;font-weight:600;font-size:14px;
  box-shadow:var(--shadow-lg);transition:top .25s var(--ease)}
.skip-link:focus{top:0;outline:none}
.container{max-width:1240px;margin:0 auto;padding:0 32px}
.narrow{max-width:920px}

/* ---------- Typographie ---------- */
h1,h2,h3,h4{font-family:'Playfair Display',Georgia,serif;font-weight:600;letter-spacing:-.012em;line-height:1.12;color:var(--fg)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:'Inter',sans-serif;font-weight:700;
  font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-bright)}
.eyebrow::before{content:'';width:24px;height:1px;background:linear-gradient(90deg,transparent,var(--accent))}
.eyebrow.center::before{display:none}
.grad{background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--fg-soft);font-size:19px;line-height:1.65;max-width:62ch}
.lead strong{color:var(--fg);font-weight:600}

/* ---------- Boutons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:'Inter',sans-serif;font-weight:600;
  font-size:15px;padding:15px 26px;border-radius:12px;border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),background .3s,border-color .3s,color .3s;will-change:transform}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:linear-gradient(160deg,var(--gold-bright),var(--gold) 55%,#B8912A);color:var(--on-accent);
  box-shadow:0 10px 30px -8px var(--glow),inset 0 1px 0 rgba(255,255,255,.35)}
.btn-primary:hover{box-shadow:0 18px 46px -10px var(--glow),inset 0 1px 0 rgba(255,255,255,.4);transform:translateY(-2px)}
.btn-ghost{background:var(--card-grad-a);border-color:var(--line-2);color:var(--fg)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-bright)}
.btn-lg{padding:17px 30px;font-size:16px}

/* ---------- Header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .45s var(--ease)}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:34px;height:82px;
  transition:all .45s var(--ease);border-bottom:1px solid transparent}
.site-header.scrolled{backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);background:color-mix(in srgb,var(--bg) 78%,transparent)}
.site-header.scrolled .bar{height:66px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{flex:none}
.brand .wm{display:flex;flex-direction:column;line-height:1}
.brand .wm .name{font-family:'Playfair Display',Georgia,serif;font-weight:600;font-size:21px;letter-spacing:.005em;color:var(--fg);white-space:nowrap}
.brand .wm .tag{font-family:'Inter',sans-serif;font-weight:600;font-size:7.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--accent-bright);margin-top:4px}
.nav{display:flex;align-items:center;gap:30px}
.nav a.lnk{font-size:15px;color:var(--fg-soft);font-weight:500;position:relative;transition:color .25s}
.nav a.lnk::after{content:'';position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:width .3s var(--ease)}
.nav a.lnk:hover,.nav a.lnk.active{color:var(--fg)}
.nav a.lnk:hover::after,.nav a.lnk.active::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:14px}

/* ---------- Sections ---------- */
.section{padding:118px 0;position:relative}
.section.tight{padding:88px 0}
.section-head{max-width:800px;margin-bottom:62px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(32px,4.1vw,52px);letter-spacing:-.014em;line-height:1.1;margin:18px 0 20px}
.section-head.center .lead{margin:0 auto}

/* ---------- Page hero (pages internes) ---------- */
.page-hero{padding:172px 0 70px;position:relative}
.page-hero h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.016em;line-height:1.06;margin:20px 0 22px}
.page-hero .lead{font-size:20px}
.breadcrumb{display:flex;gap:9px;align-items:center;font-size:13.5px;color:var(--fg-dim);margin-bottom:8px}
.breadcrumb a:hover{color:var(--accent-bright)}
.breadcrumb svg{width:13px;height:13px;opacity:.6}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:72px 0 38px;margin-top:40px;background:var(--bg-2)}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;margin-bottom:52px}
.footer-brand p{color:var(--fg-soft);font-size:15px;margin:18px 0 22px;max-width:36ch}
.footer-brand .footer-slogan{font-weight:600;font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-bright);margin:16px 0 0;max-width:none}
.footer-col h4{font-family:'Inter',sans-serif;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-dim);margin-bottom:18px;font-weight:600}
.footer-col a{display:block;color:var(--fg-soft);font-size:15px;margin-bottom:11px;transition:color .25s}
.footer-col a:hover{color:var(--accent-bright)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:28px;border-top:1px solid var(--line);
  color:var(--fg-dim);font-size:13.5px;flex-wrap:wrap;gap:14px}
.footer-bottom a:hover{color:var(--accent-bright)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}*{animation-duration:.001ms!important}}

/* ---------- Chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:11px}
.chip{display:inline-flex;align-items:center;gap:9px;padding:11px 17px;border-radius:11px;background:var(--card-grad-a);
  border:1px solid var(--line);font-size:14.5px;font-weight:600;color:var(--fg-soft);transition:.3s}
.chip:hover{border-color:var(--accent);color:var(--accent-bright);transform:translateY(-3px)}
.chip svg{width:16px;height:16px;color:var(--accent-bright)}

/* ---------- Responsive ---------- */
@media(max-width:1040px){
  .site-header .bar{flex-wrap:wrap;height:auto;min-height:58px;padding:9px 0;row-gap:4px}
  .site-header.scrolled .bar{height:auto}
  .brand{order:1}
  .nav-tools{order:2}
  .nav{order:3;width:100%;flex-direction:row;align-items:center;gap:8px;margin:0;
    overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:2px 0}
  .nav::-webkit-scrollbar{display:none}
  .nav a.lnk{flex:none;white-space:nowrap;font-size:13.5px;padding:7px 14px;border-radius:999px;
    background:var(--card-grad-a);border:1px solid var(--line);color:var(--fg-soft)}
  .nav a.lnk::after{display:none}
  .nav a.lnk:hover,.nav a.lnk.active{color:var(--accent-bright);border-color:var(--accent)}
  .nav .nav-cta{display:none}
}
@media(max-width:980px){
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
}
@media(max-width:680px){
  body{font-size:16px}
  .container{padding:0 22px}
  .section{padding:80px 0}
  .page-hero{padding:128px 0 50px}
  .footer-top{grid-template-columns:1fr;gap:32px}
}