/* ==========================================================================
   LSI Tech · Système de design « CARBONE »
   Identité matière : la hiérarchie est portée par la valeur, jamais par la teinte.
   Accent Xénon strictement fonctionnel (liens, focus, états actifs, signaux).
   Aucune requête externe : polices système, SVG inline, zéro tracker.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   -------------------------------------------------------------------------- */
:root{
  /* Matières · échelle de valeur (L* indiqué) */
  --c-carbone:      #0B0C0F;   /* L*  2 , fond */
  --c-anthracite:   #14161B;   /* L*  7 , surface 1 */
  --c-surface-2:    #191C22;   /* L*  9 , surface 2 */
  --c-graphite:     #22252C;   /* L* 15 , bordures */
  --c-graphite-2:   #2E323A;   /* L* 20 , bordures fortes */
  --c-acier:        #4A505A;   /* L* 34 , inactif */
  --c-titane:       #9BA2AC;   /* L* 66 , texte secondaire */
  --c-nickel:       #C6CBD2;   /* L* 81 , texte fort */
  --c-signal:       #F2F4F7;   /* L* 96 , titres, action principale */

  /* Accent fonctionnel */
  --c-xenon:        #5AA9FF;
  --c-xenon-soft:   #8FC6FF;
  --c-xenon-dim:    rgba(90,169,255,.13);
  --c-xenon-ring:   rgba(90,169,255,.34);

  /* Sémantique */
  --bg:             var(--c-carbone);
  --surface:        var(--c-anthracite);
  --line:           var(--c-graphite);
  --line-strong:    var(--c-graphite-2);
  --text:           var(--c-titane);
  --text-strong:    var(--c-nickel);
  --title:          var(--c-signal);

  /* Typographie */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display",
               "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Mono", ui-monospace, SFMono-Regular,
               Consolas, "Liberation Mono", monospace;

  --fs-display: clamp(2.5rem, 1.4rem + 4.6vw, 4.75rem);
  --fs-h2:      clamp(1.85rem, 1.25rem + 2.4vw, 3rem);
  --fs-h3:      clamp(1.15rem, 1.02rem + .5vw, 1.375rem);
  --fs-lead:    clamp(1.0625rem, 1rem + .35vw, 1.25rem);
  --fs-body:    1rem;
  --fs-sm:      .875rem;
  --fs-xs:      .8125rem;
  --fs-label:   .6875rem;

  /* Rythme */
  --gutter: 2rem;
  --maxw: 1200px;
  --section-y: clamp(4.5rem, 2rem + 9vw, 9rem);

  /* Formes */
  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 22px; --r-pill: 999px;

  /* Élévation · jamais colorée */
  --sh-1: 0 1px 2px rgba(0,0,0,.4);
  --sh-2: 0 18px 40px -24px rgba(0,0,0,.85);
  --sh-3: 0 40px 80px -40px rgba(0,0,0,.95);

  /* Mouvement */
  --ease: cubic-bezier(.22,.61,.36,1);
  --dur: .5s;
}

/* --------------------------------------------------------------------------
   2. BASE
   -------------------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.65;
  font-synthesis-weight:none;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4{margin:0;color:var(--title);font-weight:660;letter-spacing:-.035em;line-height:1.05;text-wrap:balance}
h1{font-size:var(--fs-display);letter-spacing:-.045em}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3);letter-spacing:-.02em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
img,svg{display:block;max-width:100%}
ul{margin:0;padding:0;list-style:none}

a{color:var(--c-xenon);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--c-xenon-soft)}

:focus-visible{
  outline:2px solid var(--c-xenon);
  outline-offset:3px;
  border-radius:4px;
}

::selection{background:var(--c-xenon);color:#04101F}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section-y);position:relative}
.section + .section{border-top:1px solid var(--line)}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-signal);color:var(--c-carbone);padding:.75rem 1.25rem;border-radius:var(--r-sm);
  font-size:var(--fs-sm);font-weight:560;
}
.skip-link:focus{left:1rem;top:1rem}

/* Utilitaires --------------------------------------------------------------- */
.label{
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.2em;
  text-transform:uppercase;color:var(--c-acier);
}
.lead{font-size:var(--fs-lead);color:var(--text);max-width:62ch}
.mono{font-family:var(--font-mono)}
.strong{color:var(--text-strong)}
.dim{color:var(--c-acier)}
.center{text-align:center;margin-inline:auto}

/* Titre de section : label + trait, motif de marque (deux modules) */
.section-head{margin-bottom:clamp(2.5rem,1.5rem+2.5vw,4rem);max-width:64ch}
.section-head .label{display:flex;align-items:center;gap:.75rem;margin-bottom:1.25rem}
.section-head .label::before{
  content:"";flex:none;width:22px;height:8px;
  background:
    linear-gradient(var(--c-titane) 0 0) left/8px 8px no-repeat,
    linear-gradient(var(--c-acier) 0 0) right/8px 8px no-repeat;
  border-radius:2px;
}
.section-head p{margin-top:1.125rem}

/* --------------------------------------------------------------------------
   3. TEXTURES DE MARQUE
   -------------------------------------------------------------------------- */
.tex-weave::before{            /* tissage carbone */
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    repeating-linear-gradient(45deg,rgba(255,255,255,.026) 0 2px,transparent 2px 9px),
    repeating-linear-gradient(-45deg,rgba(255,255,255,.026) 0 2px,transparent 2px 9px);
}
.tex-grid::before{             /* grille d'usinage */
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 78%);
}
.beam{                          /* faisceau lumineux */
  position:absolute;pointer-events:none;border-radius:50%;
  background:radial-gradient(closest-side,rgba(242,244,247,.13),transparent 72%);
  filter:blur(24px);
}
.beam--xenon{background:radial-gradient(closest-side,rgba(90,169,255,.16),transparent 72%)}

/* --------------------------------------------------------------------------
   4. COMPOSANTS
   -------------------------------------------------------------------------- */

/* Boutons ------------------------------------------------------------------ */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:var(--fs-sm);font-weight:560;line-height:1;
  padding:.875rem 1.375rem;border-radius:var(--r-sm);
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),
             color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn svg{width:1em;height:1em;flex:none}

.btn--primary{background:var(--c-signal);color:var(--c-carbone)}
.btn--primary:hover{background:#fff;color:var(--c-carbone)}

.btn--secondary{background:var(--c-surface-2);border-color:var(--line-strong);color:var(--text-strong)}
.btn--secondary:hover{border-color:var(--c-acier);color:var(--c-signal)}

.btn--ghost{color:var(--text);padding-inline:.5rem}
.btn--ghost:hover{color:var(--c-signal)}

.btn--lg{font-size:var(--fs-body);padding:1.0625rem 1.75rem}

/* Badge / pastille --------------------------------------------------------- */
.badge{
  display:inline-flex;align-items:center;gap:.625rem;
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.14em;text-transform:uppercase;
  color:var(--text);background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:.4375rem .875rem;
}
.badge .dot{
  width:5px;height:5px;border-radius:50%;flex:none;
  background:var(--c-xenon);box-shadow:0 0 0 0 var(--c-xenon-ring);
  animation:pulse 2.8s var(--ease) infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(90,169,255,.45)}
  50%{box-shadow:0 0 0 5px rgba(90,169,255,0)}
}

/* Carte -------------------------------------------------------------------- */
.card{
  position:relative;isolation:isolate;
  background:linear-gradient(165deg,var(--surface),var(--c-carbone) 130%);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:1.75rem;
  transition:border-color .3s var(--ease),transform .3s var(--ease),background-color .3s var(--ease);
}
.card::after{                   /* liseré lumineux sur l'arête haute */
  content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.055),transparent 42%);
  opacity:.9;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-2px)}

/* --------------------------------------------------------------------------
   5. EN-TÊTE
   -------------------------------------------------------------------------- */
.header{
  position:sticky;top:0;z-index:100;
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease);
}
.header.is-stuck{
  background:rgba(11,12,15,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.header__inner{display:flex;align-items:center;gap:2rem;height:72px}

.brand{display:flex;align-items:center;gap:.75rem;color:var(--c-signal)}
.brand:hover{color:var(--c-signal)}
.brand__mark{width:22px;height:22px;flex:none}
.brand__name{font-size:1rem;font-weight:660;letter-spacing:-.03em}
.brand__name .sep{color:var(--c-acier);margin-inline:.03em}
.brand__name .tech{font-weight:300;color:var(--text)}

.nav{margin-left:auto;display:flex;align-items:center;gap:2rem}
.nav__list{display:flex;gap:2rem}
.nav__link{
  font-size:var(--fs-sm);color:var(--text);position:relative;padding-block:.375rem;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:var(--c-xenon);transition:right .35s var(--ease);
}
.nav__link:hover{color:var(--c-signal)}
.nav__link:hover::after{right:0}

.nav__toggle{
  display:none;background:none;border:1px solid var(--line-strong);border-radius:var(--r-sm);
  width:42px;height:38px;color:var(--c-signal);cursor:pointer;align-items:center;justify-content:center;
}
.nav__toggle svg{width:18px;height:18px}

/* --------------------------------------------------------------------------
   6. HERO
   -------------------------------------------------------------------------- */
.hero{position:relative;overflow:hidden;padding-block:clamp(3.5rem,2rem+7vw,7rem) clamp(3rem,2rem+4vw,5.5rem)}
.hero .beam--1{width:min(760px,120vw);height:520px;right:-14%;top:-32%}
.hero .beam--2{width:min(560px,100vw);height:400px;left:-16%;bottom:-40%}
.hero__grid{
  display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:clamp(2rem,1rem+4vw,4.5rem);align-items:center;position:relative;
}
.hero__title{margin-top:1.5rem}
.hero__title .sub{color:var(--c-acier);display:block}
.hero__text{margin-top:1.625rem;max-width:48ch;font-size:var(--fs-lead)}
.hero__actions{display:flex;flex-wrap:wrap;gap:.875rem;margin-top:2.25rem}

.hero__panel{position:relative}
.panel{
  background:linear-gradient(160deg,var(--surface),#101216);
  border:1px solid var(--line);border-radius:var(--r-xl);
  padding:1.5rem;box-shadow:var(--sh-3);
}
.panel__head{
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-acier);padding-bottom:1rem;border-bottom:1px solid var(--line);
}
.panel__row{
  display:flex;align-items:center;gap:.875rem;
  padding:.8125rem 0;border-bottom:1px solid var(--line);
  font-size:var(--fs-sm);color:var(--text-strong);
}
.panel__row:last-child{border-bottom:0;padding-bottom:0}
.panel__row .sq{width:9px;height:9px;border-radius:2px;flex:none}
.panel__row .val{
  margin-left:auto;font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-acier);
  white-space:nowrap;
}

/* Bandeau de chiffres */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);margin-top:clamp(2.5rem,1.5rem+3vw,4rem);position:relative;
}
.stats__item{padding:1.5rem 1.5rem 0 0}
.stats__value{
  display:block;font-size:clamp(1.5rem,1.1rem+1.4vw,2rem);font-weight:660;letter-spacing:-.04em;
  color:var(--c-signal);line-height:1;margin-bottom:.4375rem;
}
.stats__label{font-size:var(--fs-xs);color:var(--text)}

/* --------------------------------------------------------------------------
   7. PRÉSENTATION
   -------------------------------------------------------------------------- */
.intro__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,1rem+4vw,5rem);align-items:start}
.intro__text p + p{margin-top:1.125rem}
.intro__aside{display:grid;gap:1rem}
.pillar{
  display:flex;gap:1.125rem;padding:1.25rem 1.375rem;
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);
}
.pillar__n{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-acier);padding-top:.15rem}
.pillar h3{font-size:1rem;margin-bottom:.3125rem}
.pillar p{font-size:var(--fs-sm);margin:0}

/* --------------------------------------------------------------------------
   8. EXPERTISES
   -------------------------------------------------------------------------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.expertise__icon{
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line-strong);background:var(--c-carbone);
  display:grid;place-items:center;margin-bottom:1.375rem;
  transition:border-color .3s var(--ease),background-color .3s var(--ease);
}
.expertise__icon svg{width:22px;height:22px;color:var(--c-nickel)}
.expertise__icon svg .acc{color:var(--c-xenon)}
.card:hover .expertise__icon{border-color:var(--c-acier)}
.expertise h3{margin-bottom:.625rem}
.expertise p{font-size:var(--fs-sm);margin-bottom:1.125rem}
.taglist{display:flex;flex-wrap:wrap;gap:.4375rem}
.taglist li{
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.06em;
  color:var(--c-acier);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:.25rem .5rem;
}

/* --------------------------------------------------------------------------
   9. CHAÎNE, de l'infrastructure à l'objet
   -------------------------------------------------------------------------- */
.chain{position:relative}
.chain__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;position:relative}
.chain__step{position:relative;padding:1.75rem;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(165deg,var(--surface),var(--c-carbone) 130%);overflow:hidden}
.chain__fig{height:172px;margin:-.25rem -.25rem 1.5rem;display:grid;place-items:center;
  border-radius:var(--r-md);background:var(--c-carbone);border:1px solid var(--line);position:relative;overflow:hidden}
.chain__fig svg{width:100%;height:100%}
.chain__n{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.2em;color:var(--c-acier);
  display:block;margin-bottom:.75rem}
.chain__step h3{margin-bottom:.5rem}
.chain__step p{font-size:var(--fs-sm);margin:0}

/* ---------------------------------------------------------------------------
   10. POURQUOI
   -------------------------------------------------------------------------- */
.why__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;background:var(--line)}
.why__item{background:var(--c-carbone);padding:clamp(1.5rem,1rem+1.5vw,2.25rem)}
.why__item h3{margin-bottom:.625rem;display:flex;align-items:baseline;gap:.75rem}
.why__item h3 span{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-xenon);letter-spacing:.1em}
.why__item p{font-size:var(--fs-sm);margin:0}

/* --------------------------------------------------------------------------
   11. CTA
   -------------------------------------------------------------------------- */
.cta{position:relative;overflow:hidden}
.cta__box{
  position:relative;overflow:hidden;
  border:1px solid var(--line-strong);border-radius:var(--r-xl);
  padding:clamp(2.5rem,1.5rem+5vw,5rem) clamp(1.75rem,1rem+4vw,4.5rem);
  background:linear-gradient(150deg,var(--c-anthracite),var(--c-carbone) 65%);
  box-shadow:var(--sh-3);text-align:center;
}
.cta__box .beam{width:min(700px,110vw);height:420px;left:50%;translate:-50% 0;top:-58%}
.cta__inner{position:relative;max-width:44ch;margin-inline:auto}
.cta h2{margin-bottom:1.125rem}
.cta__actions{display:flex;flex-wrap:wrap;gap:.875rem;justify-content:center;margin-top:2.25rem}
.cta__meta{
  margin-top:2.25rem;padding-top:1.75rem;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:1rem 2.5rem;justify-content:center;
  font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-acier);
}
.cta__meta a{color:var(--text-strong)}
.cta__meta a:hover{color:var(--c-signal)}

/* --------------------------------------------------------------------------
   12. PIED DE PAGE
   -------------------------------------------------------------------------- */
.footer{border-top:1px solid var(--line);padding-block:clamp(3rem,2rem+3vw,4.5rem) 2.5rem;position:relative}
.footer__top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:clamp(2rem,1rem+3vw,3.5rem);padding-bottom:3rem}
.footer__brand p{font-size:var(--fs-sm);margin-top:1.125rem;max-width:34ch}
.footer h4{font-size:var(--fs-xs);color:var(--c-signal);text-transform:uppercase;letter-spacing:.14em;
  font-family:var(--font-mono);font-weight:500;margin-bottom:1.125rem}
.footer__list li + li{margin-top:.625rem}
.footer__list a,.footer__list span{font-size:var(--fs-sm);color:var(--text)}
.footer__list a:hover{color:var(--c-signal)}

.legal{border-top:1px solid var(--line);padding-top:2rem}
.legal__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1.25rem 2rem}
.legal__item{font-size:var(--fs-xs);line-height:1.6}
.legal__item dt{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.12em;
  text-transform:uppercase;color:var(--c-acier);margin-bottom:.3125rem}
.legal__item dd{margin:0;color:var(--text)}
.footer__bottom{
  margin-top:2.5rem;padding-top:1.75rem;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:1rem 1.75rem;align-items:center;
  font-size:var(--fs-xs);color:var(--c-acier);
}
.footer__bottom nav{display:flex;flex-wrap:wrap;gap:1.5rem;margin-left:auto}
.footer__bottom nav a{color:var(--text)}
.footer__bottom nav a:hover{color:var(--c-signal)}

/* --------------------------------------------------------------------------
   13. PAGES DE CONTENU (mentions légales, confidentialité)
   -------------------------------------------------------------------------- */
.page-head{padding-block:clamp(3.5rem,2rem+5vw,6rem) 0;position:relative;overflow:hidden}
.page-head .beam{width:min(620px,110vw);height:360px;right:-10%;top:-46%}
.prose{max-width:74ch;padding-block:clamp(2.5rem,2rem+2vw,4rem) var(--section-y)}
.prose h2{font-size:clamp(1.375rem,1.2rem+.8vw,1.75rem);margin:3rem 0 1rem}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.0625rem;margin:2rem 0 .625rem}
.prose p,.prose li{font-size:var(--fs-sm);line-height:1.75}
.prose ul{margin:0 0 1em;padding-left:1.125rem;list-style:disc}
.prose li{margin-bottom:.4375rem}
.prose dl{display:grid;grid-template-columns:minmax(150px,220px) 1fr;gap:0;margin:1.25rem 0}
.prose dt{font-size:var(--fs-xs);color:var(--c-acier);padding:.625rem 0;border-bottom:1px solid var(--line)}
.prose dd{font-size:var(--fs-sm);margin:0;padding:.625rem 0;border-bottom:1px solid var(--line);color:var(--text-strong)}
.todo{
  background:var(--surface);border:1px dashed var(--c-acier);border-radius:var(--r-sm);
  color:var(--c-nickel);padding:.125rem .5rem;font-family:var(--font-mono);font-size:.8em;
}
.callout{
  border:1px solid var(--line);border-left:3px solid var(--c-xenon);border-radius:var(--r-md);
  background:var(--surface);padding:1.25rem 1.5rem;margin:1.75rem 0;
}
.callout p{margin:0;font-size:var(--fs-sm)}

/* --------------------------------------------------------------------------
   14. ANIMATIONS
   -------------------------------------------------------------------------- */
/* Amélioration progressive : l'état masqué n'existe que si JavaScript est actif.
   Sans JS, ou si le script échoue, la page reste intégralement lisible. */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}
.js .reveal[data-delay="1"]{transition-delay:.07s}
.js .reveal[data-delay="2"]{transition-delay:.14s}
.js .reveal[data-delay="3"]{transition-delay:.21s}
.js .reveal[data-delay="4"]{transition-delay:.28s}
.js .reveal[data-delay="5"]{transition-delay:.35s}

.js .draw{stroke-dasharray:var(--len,600);stroke-dashoffset:var(--len,600);transition:stroke-dashoffset 1.6s var(--ease)}
.js .is-in .draw{stroke-dashoffset:0}

@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  .js .draw{stroke-dashoffset:0;transition:none}
  .badge .dot{animation:none}
  .btn:hover,.card:hover{transform:none}
  *{scroll-behavior:auto!important}
}

/* --------------------------------------------------------------------------
   15. RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width:1024px){
  .grid-3,.chain__grid{grid-template-columns:repeat(2,1fr)}
  .footer__top{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:860px){
  :root{--gutter:1.25rem}
  .nav__list{
    position:fixed;inset:72px 0 auto;flex-direction:column;gap:0;
    background:rgba(11,12,15,.97);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);padding:.5rem 1.25rem 1.25rem;
    transform:translateY(-8px);opacity:0;visibility:hidden;
    transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
  }
  .nav__list.is-open{opacity:1;visibility:visible;transform:none}
  .nav__list li{border-bottom:1px solid var(--line)}
  .nav__list li:last-child{border-bottom:0}
  .nav__link{display:block;padding:1rem 0;font-size:1rem}
  .nav__link::after{display:none}
  .nav__toggle{display:flex}
  .nav .btn{display:none}

  .hero__grid{grid-template-columns:1fr}
  .hero__panel{order:2}
  .stats{grid-template-columns:repeat(2,1fr);gap:0 1rem}
  .stats__item{padding-right:1rem}
  .intro__grid{grid-template-columns:1fr}
  .grid-3,.chain__grid,.why__grid{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr;gap:2.25rem}
  .footer__bottom nav{margin-left:0;width:100%}
  .prose dl{grid-template-columns:1fr}
  .prose dt{border-bottom:0;padding-bottom:0}
}

@media (max-width:480px){
  .hero__actions .btn,.cta__actions .btn{width:100%;justify-content:center}
}

/* --------------------------------------------------------------------------
   16. PAGE DE TEASING, état actuel du site public
   -------------------------------------------------------------------------- */
.teaser{
  min-height:100vh;min-height:100svh;display:flex;flex-direction:column;
  position:relative;overflow:hidden;
}
.teaser .beam--t1{width:min(820px,130vw);height:560px;right:-16%;top:-34%}
.teaser .beam--t2{width:min(620px,110vw);height:420px;left:-18%;bottom:-30%}

.teaser__top{padding-block:clamp(1.75rem,1rem+2vw,2.75rem);position:relative}
.teaser__body{
  flex:1;display:flex;align-items:center;
  padding-block:clamp(2rem,1rem+5vw,5rem);position:relative;
}
.teaser__inner{max-width:56ch}

.teaser__mark{width:clamp(56px,4vw+40px,76px);height:auto;margin-bottom:clamp(2rem,1rem+2.5vw,3rem)}
.teaser__mark rect{opacity:0;animation:mark-in .7s var(--ease) forwards}
.teaser__mark rect:nth-child(1){animation-delay:.15s}
.teaser__mark rect:nth-child(2){animation-delay:.42s}
.teaser__mark rect:nth-child(3){animation-delay:.56s}
@keyframes mark-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.teaser h1{
  font-size:clamp(2.15rem,1.3rem+3.8vw,4.25rem);letter-spacing:-.045em;line-height:1.03;
}
.teaser h1 .sub{color:var(--c-acier);display:block}
.teaser__text{font-size:var(--fs-lead);margin-top:1.75rem;max-width:50ch}

.teaser__trio{
  display:flex;flex-wrap:wrap;align-items:center;gap:.875rem 1.25rem;
  margin-top:clamp(2rem,1rem+2.5vw,2.75rem);
  padding-top:clamp(1.75rem,1rem+2vw,2.25rem);border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.16em;text-transform:uppercase;
  color:var(--text);
}
.teaser__trio .sep{width:4px;height:4px;border-radius:1px;background:var(--c-acier);flex:none}

.teaser__actions{display:flex;flex-wrap:wrap;gap:.875rem 1.5rem;align-items:center;margin-top:2.25rem}
.teaser__note{font-size:var(--fs-sm);color:var(--c-acier)}

.teaser__foot{
  position:relative;border-top:1px solid var(--line);
  padding-block:1.5rem clamp(1.5rem,1rem+1vw,2rem);
  display:flex;flex-wrap:wrap;gap:.75rem 1.75rem;align-items:baseline;
  font-size:var(--fs-xs);color:var(--c-acier);
}
.teaser__foot .legal-line{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.08em}
.teaser__foot nav{display:flex;flex-wrap:wrap;gap:1.25rem;margin-left:auto}
.teaser__foot nav a{color:var(--text)}
.teaser__foot nav a:hover{color:var(--c-signal)}

@media (max-width:860px){
  .teaser__foot nav{margin-left:0;width:100%}
}
@media (prefers-reduced-motion:reduce){
  .teaser__mark rect{opacity:1;animation:none}
}

/* --------------------------------------------------------------------------
   17. IMPRESSION, l'identité tient en noir et blanc
   -------------------------------------------------------------------------- */
@media print{
  :root{--bg:#fff;--text:#333;--title:#000}
  body{background:#fff;color:#222}
  .header,.nav,.cta__actions,.hero__actions,.beam{display:none!important}
  h1,h2,h3,h4{color:#000}
  .card,.panel,.why__item{border-color:#ccc!important;background:#fff!important;box-shadow:none!important}
  a{color:#000;text-decoration:underline}
}