/* =========================================================
   Design system (tokens, base, composants partagés)
   Toutes les pages importent ce fichier. Les styles propres
   à une page vont dans assets/css/<page>.css
   ========================================================= */

:root {
  /* Couleurs */
  --bg: #050608;
  --bg-elev: #0c0e12;
  --bg-card: #111419;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f5f7;
  --text-dim: #a1a1a6;
  --text-faint: #6e6e73;
  --accent: #3ef0a1;          /* vert électrique */
  --accent-2: #2fb7ff;        /* bleu cellule */
  --accent-grad: linear-gradient(120deg, #3ef0a1 0%, #2fb7ff 100%);
  --glow: 0 0 60px rgba(62, 240, 161, 0.25);

  /* Typographie */
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fs-hero: clamp(3rem, 9vw, 8.5rem);
  --fs-h1: clamp(2.5rem, 6vw, 5.5rem);
  --fs-h2: clamp(2rem, 4.5vw, 3.75rem);
  --fs-h3: clamp(1.25rem, 2vw, 1.75rem);
  --fs-lead: clamp(1.125rem, 1.6vw, 1.5rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;

  /* Espacements & formes */
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1240px;
  --section-y: clamp(96px, 14vw, 200px);
  --radius: 28px;
  --radius-sm: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 64px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: #000; }

/* ---------- Typographie ---------- */
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.03em; line-height: 1.04; }
.t-hero { font-size: var(--fs-hero); letter-spacing: -0.05em; line-height: 0.95; }
.t-h1 { font-size: var(--fs-h1); }
.t-h2 { font-size: var(--fs-h2); }
.t-h3 { font-size: var(--fs-h3); letter-spacing: -0.02em; line-height: 1.2; }
.t-lead { font-size: var(--fs-lead); color: var(--text-dim); line-height: 1.45; font-weight: 400; }
.t-dim { color: var(--text-dim); }
.t-small { font-size: var(--fs-small); }
.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.grad-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--section-y) 0; position: relative; }
.center { text-align: center; }
.stack > * + * { margin-top: 24px; }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600; font-size: 1rem;
  transition: transform .4s var(--ease), background .3s, box-shadow .3s, color .3s;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #031b10; box-shadow: var(--glow); }
.btn-primary:hover { box-shadow: 0 0 80px rgba(62, 240, 161, 0.45); }
.btn-ghost { border: 1px solid var(--line-strong); background: rgba(255,255,255,0.03); backdrop-filter: blur(10px); }
.btn-ghost:hover { background: rgba(255,255,255,0.08); }
.btn-link { color: var(--accent-2); font-weight: 600; display: inline-flex; gap: 6px; align-items: center; }
.btn-link::after { content: "›"; font-size: 1.3em; line-height: 1; transition: transform .3s var(--ease); }
.btn-link:hover::after { transform: translateX(4px); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }
.center .btn-row { justify-content: center; }

/* ---------- Cartes ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 3vw, 40px);
  position: relative;
  overflow: hidden;
  transition: border-color .4s, transform .6s var(--ease);
}
.card:hover { border-color: var(--line-strong); }
.glass {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  font-size: 0.8125rem; font-weight: 500;
  border: 1px solid var(--line-strong); color: var(--text-dim);
}

/* ---------- Navigation (injectée par main.js) ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background .4s, border-color .4s, backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(5, 6, 8, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-color: var(--line);
}
.nav__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav__logo { font-weight: 800; letter-spacing: 0.18em; font-size: 1rem; display: flex; align-items: center; gap: 10px; }
.nav__logo-mark { width: 22px; height: 22px; border-radius: 6px; background: var(--accent-grad); box-shadow: var(--glow); }
.nav__links { display: flex; gap: 32px; font-size: 0.9375rem; color: var(--text-dim); }
.nav__links a { transition: color .2s; }
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--text); }
.nav__cta { padding: 9px 18px; font-size: 0.875rem; }
.nav__burger { display: none; width: 40px; height: 40px; position: relative; }
.nav__burger span { position: absolute; left: 10px; right: 10px; height: 1.5px; background: var(--text); transition: transform .4s var(--ease), top .4s var(--ease); }
.nav__burger span:nth-child(1) { top: 16px; }
.nav__burger span:nth-child(2) { top: 23px; }
.nav.is-open .nav__burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { top: 20px; transform: rotate(-45deg); }
@media (max-width: 860px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: block; }
  .nav.is-open { background: rgba(5,6,8,0.96); height: 100dvh; }
  .nav.is-open .nav__inner { height: var(--nav-h); }
  .nav.is-open .nav__links {
    display: flex; flex-direction: column; gap: 22px;
    position: absolute; top: calc(var(--nav-h) + 24px); left: var(--gutter);
    font-size: 1.75rem; font-weight: 600; color: var(--text);
  }
}

/* ---------- Footer (injecté par main.js) ---------- */
.footer { border-top: 1px solid var(--line); padding: 72px 0 40px; color: var(--text-dim); font-size: var(--fs-small); }
.footer__grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; }
.footer h4 { color: var(--text); font-size: 0.875rem; margin-bottom: 16px; letter-spacing: 0; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a:hover { color: var(--text); }
.footer__bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--text-faint); }
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr 1fr; } .footer__grid > :first-child { grid-column: 1 / -1; } }

/* ---------- Animations d'apparition ----------
   Ajoutez data-reveal sur un élément : il apparaît au scroll.
   data-reveal="up" (défaut) | "fade" | "scale"
   data-reveal-stagger sur un parent : enfants en cascade. */
[data-reveal] { opacity: 0; }
.no-js [data-reveal], .reduced-motion [data-reveal] { opacity: 1 !important; transform: none !important; }

/* Fond décoratif réutilisable */
.glow-orb {
  position: absolute; width: 60vw; height: 60vw; max-width: 900px; max-height: 900px;
  border-radius: 50%; filter: blur(120px); opacity: .18; pointer-events: none; z-index: 0;
  background: radial-gradient(circle, var(--accent) 0%, transparent 60%);
}
.noise::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}