/* ============================================================
   AIGEN SOLUTIONS — Design System
   Palette charte : anthracite #232D42 + bleu #3159C9 / #4F73D9
   Polices charte : Outfit (titres) + Inter (texte)
   Thèmes : dark (défaut) + light, via [data-theme]
   ============================================================ */

/* ---------- Tokens : DARK (défaut) ---------- */
:root,
[data-theme="dark"]{
  --bg:#080A0F;
  --bg-2:#0C0F16;
  --surface:#11151E;
  --surface-2:#161B26;
  --surface-3:#1C2230;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.15);

  --fg:#EEF1F8;
  --fg-soft:#AEB6C6;
  --fg-dim:#6E7789;

  --navy:#232D42;
  --peri:#4F73D9;          /* bleu charte — lisible sur fond sombre */
  --peri-bright:#7E9BF0;
  --peri-deep:#3159C9;     /* bleu principal de la charte */
  --accent:var(--peri);
  --accent-bright:var(--peri-bright);
  --on-accent:#0A0C12;

  --glow:rgba(79,115,217,.42);
  --grid-line:rgba(255,255,255,.04);
  --logo-ink:#EEF1F8;
  --logo-accent:#5E80E8;

  --card-grad-a:rgba(255,255,255,.05);
  --card-grad-b:rgba(255,255,255,.012);
  --hero-bg:radial-gradient(680px 440px at 80% -5%,rgba(49,89,201,.30),transparent 68%),
            radial-gradient(760px 540px at 4% 8%,rgba(49,89,201,.14),transparent 64%),
            radial-gradient(900px 760px at 50% 112%,rgba(79,115,217,.12),transparent 70%);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 20px 50px -24px rgba(0,0,0,.7);
  --shadow-lg:0 2px 6px rgba(0,0,0,.5),0 40px 90px -32px rgba(0,0,0,.8);
  --tile-base:#161B26;
  color-scheme:dark;
}

/* ---------- Tokens : LIGHT ---------- */
[data-theme="light"]{
  --bg:#FFFFFF;
  --bg-2:#F5F7FA;
  --surface:#FFFFFF;
  --surface-2:#F5F7FA;
  --surface-3:#EAEEF6;
  --line:#E4E8F0;
  --line-2:#D2D9E6;

  --fg:#232D42;
  --fg-soft:#4A5568;
  --fg-dim:#8A93A6;

  --navy:#232D42;
  --peri:#3159C9;
  --peri-bright:#4F73D9;
  --peri-deep:#26489E;
  --accent:var(--peri);
  --accent-bright:var(--peri-bright);
  --on-accent:#FFFFFF;

  --glow:rgba(49,89,201,.22);
  --grid-line:rgba(35,45,66,.05);
  --logo-ink:#232D42;
  --logo-accent:#3159C9;

  --card-grad-a:#FFFFFF;
  --card-grad-b:#FFFFFF;
  --hero-bg:radial-gradient(720px 440px at 86% 2%,rgba(49,89,201,.10),transparent 62%),
            linear-gradient(180deg,#FFFFFF,#F5F7FA);
  --shadow:0 1px 2px rgba(16,22,40,.05),0 16px 40px -22px rgba(16,22,40,.18);
  --shadow-lg:0 2px 6px rgba(16,22,40,.06),0 36px 80px -30px rgba(16,22,40,.26);
  --tile-base:#0E1116;
  color-scheme:light;
}

/* ---------- Base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',sans-serif;background:var(--bg);color:var(--fg);
  line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  transition:background .5s ease,color .5s ease;
}
/* ambient layers */
.bg-ambient{position:fixed;inset:0;z-index:-3;pointer-events:none;background:var(--hero-bg);opacity:.9;transition:opacity .5s}
.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%;opacity:.9}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1240px;margin:0 auto;padding:0 32px}
.narrow{max-width:920px}

/* ---------- Typography ---------- */
h1,h2,h3,h4{font-family:'Outfit',sans-serif;font-weight:600;letter-spacing:-.025em;line-height:1.05;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:.18em;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:linear-gradient(100deg,var(--fg) 8%,var(--accent-bright) 52%,var(--accent) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--fg-soft);font-size:19px;line-height:1.65;max-width:62ch}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:'Outfit',sans-serif;font-weight:500;
  font-size:15.5px;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(180deg,var(--accent-bright),var(--accent));color:var(--on-accent);
  box-shadow:0 10px 30px -8px var(--glow),inset 0 1px 0 rgba(255,255,255,.25);font-weight:600}
.btn-primary:hover{box-shadow:0 18px 46px -10px var(--glow),inset 0 1px 0 rgba(255,255,255,.3)}
.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:16.5px}
:root{--ease:cubic-bezier(.22,.61,.36,1)}

/* ---------- 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) 75%,transparent)}
.site-header.scrolled .bar{height:66px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;color:var(--logo-ink);--logo-bg:var(--bg)}
.brand .ag-mark{flex:none}
.brand .wm{display:flex;flex-direction:column;line-height:1}
.brand .wm .name{font-family:'Outfit',sans-serif;font-weight:600;font-size:18px;letter-spacing:-.01em;color:var(--logo-ink);white-space:nowrap}
.brand .wm .name .ai{color:var(--accent-bright)}
.brand .wm .tag{font-family:'Inter',sans-serif;font-weight:600;font-size:7.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--fg-dim);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}
.theme-toggle{width:42px;height:42px;border-radius:11px;border:1px solid var(--line-2);background:var(--card-grad-a);
  display:grid;place-items:center;cursor:pointer;color:var(--fg-soft);transition:.3s;flex:none}
.theme-toggle:hover{color:var(--accent-bright);border-color:var(--accent)}
.theme-toggle svg{width:19px;height:19px}
.theme-toggle .ic-sun{display:none}
[data-theme="light"] .theme-toggle .ic-sun{display:block}
[data-theme="light"] .theme-toggle .ic-moon{display:none}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.menu-toggle span{width:24px;height:2px;background:var(--fg);transition:.3s;border-radius:2px}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Section shell ---------- */
.section{padding:118px 0;position:relative}
.section.tight{padding:88px 0}
.section-head{max-width:780px;margin-bottom:62px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(32px,4.1vw,54px);margin:18px 0 20px}
.section-head.center .lead{margin:0 auto}

/* ---------- Page hero (interior pages) ---------- */
.page-hero{padding:172px 0 70px;position:relative}
.page-hero h1{font-size:clamp(38px,5vw,68px);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:34ch}
.footer-brand .footer-slogan{font-family:'Outfit',sans-serif;font-weight:600;font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-bright);margin:16px 0 0;max-width:none}
.footer-social{display:flex;gap:10px}
.footer-social a{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--fg-soft);transition:.3s}
.footer-social a:hover{color:var(--accent-bright);border-color:var(--accent);transform:translateY(-3px)}
.footer-social svg{width:18px;height:18px}
.footer-col h4{font-family:'Outfit',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}}

/* ---------- Reusable: 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)}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:1000;background:rgba(4,6,10,.92);backdrop-filter:blur(8px);
  display:none;align-items:center;justify-content:center;padding:48px;opacity:0;transition:opacity .3s}
.lightbox.open{display:flex;opacity:1}
.lightbox img{max-width:92vw;max-height:80vh;border-radius:14px;box-shadow:0 40px 120px -20px rgba(0,0,0,.9);border:1px solid rgba(255,255,255,.1)}
.lb-close{position:absolute;top:24px;right:28px;width:46px;height:46px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;cursor:pointer;display:grid;place-items:center;transition:.3s}
.lb-close:hover{background:rgba(255,255,255,.14)}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);color:#fff;cursor:pointer;display:grid;place-items:center;transition:.3s}
.lb-nav:hover{background:rgba(255,255,255,.16)}
.lb-prev{left:30px}.lb-next{right:30px}
.lb-counter{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.7);font-size:14px;font-family:'Outfit',sans-serif;letter-spacing:.05em}
.lb-nav svg,.lb-close svg{width:20px;height:20px}

/* ---------- Responsive ---------- */
@media(max-width:1040px){
  /* Nav mobile : liens toujours visibles (pills défilables) au lieu du menu burger caché */
  .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}
  .menu-toggle{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}
  .lightbox{padding:18px}
  .lb-prev{left:10px}.lb-next{right:10px}
}