/* =============================================================
   Y TECHNOLOGY — Identité premium
   Complexité → Évidence
   ============================================================= */

:root{
  /* --- Palette : noir profond, blanc cassé, gris, un bleu discret --- */
  --bg:        #0A0A0B;
  --bg-2:      #0C0C0E;
  --ink:       #F3F2ED;   /* blanc cassé */
  --ink-soft:  #9B9B96;
  --ink-faint: #605F5C;
  --line:      rgba(243,242,237,.09);
  --line-2:    rgba(243,242,237,.05);
  --accent:    #3B5BFF;   /* bleu électrique, employé avec parcimonie */
  --accent-dim:rgba(59,91,255,.14);

  /* --- Type --- */
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* --- Rythme --- */
  --pad: clamp(22px, 5.5vw, 96px);
  --maxw: 1160px;

  /* --- Courbes d'animation --- */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-soft: cubic-bezier(.4, 0, .2, 1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.55;
  letter-spacing:-.01em;
  font-feature-settings:"ss01","cv05","cv11";
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

::selection{ background:var(--accent-dim); color:var(--ink); }

a{ color:inherit; text-decoration:none; }
:focus-visible{ outline:2px solid var(--accent); outline-offset:4px; }
.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}
.no-js .intro{ display:none; }
.no-js .reveal,
.no-js .hero__wordmark,
.no-js .hero__role,
.no-js .hero__lede,
.no-js .hero__for,
.no-js .hero__actions,
.no-js .scroll-hint,
.no-js .eq,
.no-js .logo__y path{ opacity:1; transform:none; }
.no-js .eq--from{ letter-spacing:-.02em; }
.no-js .eq--arrow{ transform:scaleX(1); }
.no-js .logo .draw{ stroke-dashoffset:0; }

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.wrap--center{ text-align:center; }

.muted{ color:var(--ink-soft); }
.ink{ color:var(--ink); }

/* =============================================================
   NAV
   ============================================================= */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:60;
  display:flex; align-items:center; justify-content:space-between;
  padding:18px var(--pad);
  transition:background .5s var(--ease-soft), border-color .5s var(--ease-soft), padding .5s var(--ease-soft);
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(10,10,11,.72);
  backdrop-filter:saturate(140%) blur(14px);
  -webkit-backdrop-filter:saturate(140%) blur(14px);
  border-bottom-color:var(--line-2);
  padding-top:13px; padding-bottom:13px;
}
.nav__brand{
  display:flex; align-items:center; gap:11px;
  font-size:14px; letter-spacing:.02em; color:var(--ink);
}
.mark--nav{ width:26px; height:26px; }
.nav__word{
  font-weight:400; opacity:.92;
  font-size:12.5px; letter-spacing:.34em; text-transform:uppercase;
  transition:opacity .4s var(--ease);
}
.nav__links{
  display:flex; align-items:center; gap:clamp(16px,2.4vw,34px);
  font-size:13.5px; color:var(--ink-soft); letter-spacing:.01em;
}
.nav__toggle{ display:none; }
.nav__links a{ transition:color .3s var(--ease); }
.nav__links a:hover{ color:var(--ink); }
/* Contact : un lien comme les autres, jamais un bouton — le logo prime */
.nav__cta{ color:var(--ink-soft); }
.nav__cta:hover{ color:var(--ink); }

/* =============================================================
   MARQUE (logo statique réutilisable)
   ============================================================= */
.mark{ display:block; }
.mark__trace circle{
  fill:none; stroke:var(--ink); stroke-width:.85px;
  vector-effect:non-scaling-stroke; opacity:.16;
}
.mark__y path{
  fill:none; stroke:var(--ink); stroke-width:1.5px;
  vector-effect:non-scaling-stroke;
  stroke-linecap:butt; stroke-linejoin:round;
}

/* =============================================================
   HERO
   ============================================================= */
.hero{
  position:relative;
  min-height:100svh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center;
  padding:96px var(--pad) 72px;
  overflow:hidden;
}
.hero__inner{
  position:relative; z-index:2;
  display:flex; flex-direction:column; align-items:center;
  width:100%;
}

/* -- Champ de construction en fond (cercles/axes très discrets) -- */
.field{
  position:absolute; inset:0; z-index:1;
  pointer-events:none;
  background:
    radial-gradient(120% 90% at 50% 34%, transparent 58%, rgba(0,0,0,.5) 100%);
}
.field::before{
  content:""; position:absolute; inset:-10%;
  background-image:
    repeating-linear-gradient(0deg, rgba(243,242,237,.018) 0 1px, transparent 1px 128px),
    repeating-linear-gradient(90deg, rgba(243,242,237,.018) 0 1px, transparent 1px 128px);
  mask-image:radial-gradient(66% 56% at 50% 40%, #000 0%, transparent 70%);
  -webkit-mask-image:radial-gradient(66% 56% at 50% 40%, #000 0%, transparent 70%);
  opacity:.5;
  transform:translateY(var(--field-shift, 0));
  transition:transform .2s linear;
}

/* -- Le logo animé -- */
.hero__logo{
  width:clamp(176px, 29vw, 260px);
  aspect-ratio:1;
  margin-bottom:clamp(18px, 3vh, 30px);
}
.logo{ width:100%; height:100%; overflow:visible; }

/* traits communs de construction */
.logo .draw{ fill:none; stroke:var(--ink); }
.logo__circles circle{ stroke-width:.85px; vector-effect:non-scaling-stroke; opacity:0; }
.logo__construction path,
.logo__construction line,
.logo__construction circle{ stroke-width:.85px; vector-effect:non-scaling-stroke; opacity:0; }
.logo__nodes circle{ fill:var(--ink); opacity:0; }
.logo__node--center{ fill:var(--accent); }
.logo__grain rect{ fill:#fff; }
.logo__grain{ opacity:0; transition:opacity 2.6s var(--ease-soft); }
.hero__logo.is-built .logo__grain{ opacity:.09; }
.hero__logo.is-built.is-recall .logo__grain{ opacity:.16; transition:opacity 1.1s var(--ease-soft); }
.logo__y path{
  stroke-width:8; stroke-linecap:butt; stroke-linejoin:round; opacity:0;
}

/* état des tracés animables : masqués par le dashoffset */
.logo .draw{
  stroke-dasharray:1; stroke-dashoffset:1;
}

/* --- Séquence de construction (pilotée par .is-built sur le stage) --- */
.hero__logo .logo__circles circle{
  transition:opacity 1.4s var(--ease-soft), stroke-dashoffset 2s var(--ease-soft);
}
.hero__logo.is-drawing .logo__circles circle{ opacity:.4; stroke-dashoffset:0; }
.hero__logo.is-drawing .logo__circles circle:nth-child(2){ transition-delay:.18s; }
.hero__logo.is-drawing .logo__circles circle:nth-child(3){ transition-delay:.36s; }

.hero__logo .logo__construction path,
.hero__logo .logo__construction line,
.hero__logo .logo__construction circle{
  transition:opacity 1s var(--ease-soft), stroke-dashoffset 1.6s var(--ease-soft);
  transition-delay:.9s;
}
.hero__logo.is-drawing .logo__construction path,
.hero__logo.is-drawing .logo__construction line,
.hero__logo.is-drawing .logo__construction circle{ opacity:.32; stroke-dashoffset:0; }

.hero__logo .logo__nodes circle{ transition:opacity .8s var(--ease); transition-delay:1.4s; }
.hero__logo.is-drawing .logo__nodes circle{ opacity:.55; }

.hero__logo .logo__y path{
  transition:opacity .05s linear, stroke-dashoffset 1.7s var(--ease);
  transition-delay:1.7s;
}
.hero__logo.is-drawing .logo__y path{ opacity:1; stroke-dashoffset:0; }

/* état final : le brouillon s'efface, le Y reste + quelques traces */
.hero__logo.is-built .logo__circles circle{ opacity:.08; transition:opacity 2.4s var(--ease-soft); }
.hero__logo.is-built .logo__construction path,
.hero__logo.is-built .logo__construction line,
.hero__logo.is-built .logo__construction circle{ opacity:0; transition:opacity 1.6s var(--ease-soft); }
.hero__logo.is-built .logo__nodes circle{ opacity:0; transition:opacity 1.4s var(--ease-soft); }
.hero__logo.is-built .logo__node--center{ opacity:.9; transition:opacity 1.4s var(--ease-soft); }
.hero__logo.is-built .logo__y path{ opacity:1; }

/* réapparition du raisonnement au survol / à l'approche souris */
.hero__logo.is-built.is-recall .logo__circles circle{ opacity:.28; transition:opacity 1.1s var(--ease-soft); }
.hero__logo.is-built.is-recall .logo__construction path,
.hero__logo.is-built.is-recall .logo__construction line,
.hero__logo.is-built.is-recall .logo__construction circle{ opacity:.2; transition:opacity 1.1s var(--ease-soft); }
.hero__logo.is-built.is-recall .logo__nodes circle{ opacity:.4; transition:opacity 1.1s var(--ease-soft); }

/* -- Wordmark -- */
.hero__wordmark{
  display:flex; align-items:center; gap:.62em;
  font-size:13px; font-weight:400; letter-spacing:.42em; text-transform:uppercase;
  color:var(--ink); padding-left:.42em;
  opacity:0; transform:translateY(10px);
}
.hero__wordmark span{ color:var(--ink-soft); font-weight:300; }
.hero__wordmark.is-in{ opacity:1; transform:none; transition:opacity 1s var(--ease), transform 1s var(--ease); }

/* descripteur professionnel, sous la signature de marque */
.hero__role{
  margin-top:11px;
  font-size:clamp(12.5px,1.5vw,14.5px); font-weight:400; letter-spacing:.02em;
  color:var(--ink-soft);
  opacity:0; transform:translateY(8px);
}
.hero__role.is-in{ opacity:1; transform:none; transition:opacity 1s var(--ease) .12s, transform 1s var(--ease) .12s; }

/* -- Équation Complexité → Évidence -- */
.hero__equation{
  display:flex; align-items:center; justify-content:center;
  gap:clamp(14px,2.4vw,28px);
  margin-top:clamp(14px,2.2vh,22px);
  font-size:clamp(28px, 5vw, 54px);
  font-weight:200;
  line-height:1;
}
.eq{ display:inline-block; }
.eq--from{ color:var(--ink-soft); font-weight:200; opacity:0; letter-spacing:.2em; transform:translateY(6px); }
.eq--arrow{ color:var(--accent); font-weight:200; font-size:.82em; opacity:0; transform:scaleX(0); transform-origin:left center; }
.eq--to{ color:var(--ink); font-weight:300; letter-spacing:-.02em; opacity:0; transform:translateY(10px); }

/* effet d'entrée : la complexité se condense, la flèche se dessine, l'évidence se pose */
.hero__equation.is-in .eq--from{
  opacity:1; letter-spacing:-.02em; transform:none;
  transition:opacity 1.1s var(--ease), letter-spacing 1.6s var(--ease), transform 1.1s var(--ease);
}
.hero__equation.is-in .eq--arrow{
  opacity:1; transform:scaleX(1);
  transition:opacity .5s var(--ease) 1s, transform 1s var(--ease) 1s;
}
.hero__equation.is-in .eq--to{
  opacity:1; transform:none;
  transition:opacity 1s var(--ease) 1.7s, transform 1s var(--ease) 1.7s;
}

.hero__lede{
  margin-top:clamp(18px,2.8vh,28px);
  font-size:clamp(15px,2vw,19px);
  color:var(--ink-soft);
  line-height:1.5;
  max-width:38ch;
  opacity:0; transform:translateY(12px);
}
.hero__lede.is-in{ opacity:1; transform:none; transition:opacity 1s var(--ease) .2s, transform 1s var(--ease) .2s; }

/* qualification client : « pour qui » — discret, sous la promesse */
.hero__for{
  margin-top:clamp(10px,1.8vh,16px);
  font-size:clamp(12.5px,1.4vw,14px);
  color:var(--ink-faint);
  line-height:1.5; max-width:44ch;
  opacity:0; transform:translateY(10px);
}
.hero__for.is-in{ opacity:1; transform:none; transition:opacity 1s var(--ease) .25s, transform 1s var(--ease) .25s; }

.hero__actions{ margin-top:clamp(18px,2.8vh,28px); opacity:0; transform:translateY(12px); }
.hero__actions.is-in{ opacity:1; transform:none; transition:opacity 1s var(--ease) .35s, transform 1s var(--ease) .35s; }

.hero__positioning{
  margin-top:clamp(40px,7vh,72px);
  font-family:var(--mono);
  font-size:11.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-faint);
  display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:2px;
  opacity:0;
}
.hero__positioning.is-in{ opacity:1; transition:opacity 1.2s var(--ease) .5s; }
.hero__positioning .dot{ margin:0 12px; opacity:.5; }

/* -- Bouton -- */
.btn{
  display:inline-flex; align-items:center;
  padding:15px 30px;
  font-size:14.5px; font-weight:400; letter-spacing:.01em;
  color:var(--ink); background:transparent;
  border:1px solid rgba(243,242,237,.2); border-radius:100px;
  transition:border-color .5s var(--ease), background .5s var(--ease), color .5s var(--ease);
}
.btn:hover{ border-color:rgba(243,242,237,.5); background:rgba(243,242,237,.035); }

/* -- Indice de scroll -- */
.scroll-hint{
  position:absolute; bottom:26px; left:50%; transform:translateX(-50%);
  z-index:3; width:22px; height:34px; border:1px solid var(--line);
  border-radius:14px; display:grid; place-items:center;
  opacity:0; transition:opacity 1s var(--ease) 1s, border-color .3s var(--ease);
}
.scroll-hint.is-in{ opacity:.7; }
.scroll-hint:hover{ border-color:rgba(243,242,237,.3); }
.scroll-hint span{
  width:2px; height:7px; background:var(--ink-soft); border-radius:2px;
  animation:scrolldrop 1.9s var(--ease) infinite;
}
@keyframes scrolldrop{
  0%{ transform:translateY(-5px); opacity:0; }
  40%{ opacity:1; }
  80%{ transform:translateY(6px); opacity:0; }
  100%{ opacity:0; }
}

/* =============================================================
   SECTIONS — rythme & typographie
   ============================================================= */
.section{ position:relative; padding:clamp(96px,16vh,190px) 0; scroll-margin-top:72px; }
.section + .section{ border-top:1px solid var(--line-2); }

.eyebrow{
  font-family:var(--mono);
  font-size:12px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-faint);
  display:flex; align-items:center; gap:14px;
  margin-bottom:clamp(28px,5vh,46px);
}
.eyebrow span{
  color:var(--ink-soft);
  padding-right:14px; border-right:1px solid var(--line);
}
.wrap--center .eyebrow{ justify-content:center; }

.display{
  font-size:clamp(28px, 5vw, 56px);
  font-weight:400; line-height:1.06; letter-spacing:-.035em;
  max-width:20ch;
}
.wrap--center .display{ max-width:none; }
.display--xl{ font-size:clamp(34px,7vw,80px); }

.lead{
  font-size:clamp(17px,2.2vw,22px); line-height:1.55; color:var(--ink-soft);
  max-width:46ch; margin-top:clamp(22px,4vh,34px);
}
.lead--center{ margin-inline:auto; max-width:none; }

.statement{
  font-size:clamp(22px,3.4vw,38px);
  font-weight:300; line-height:1.28; letter-spacing:-.025em;
  color:var(--ink);
  margin-top:clamp(46px,8vh,90px);
  max-width:24ch;
}
.statement--center{ margin-inline:auto; max-width:none; text-align:center; }
.muted--center{ text-align:center; margin-top:18px; }

/* =============================================================
   01 — POURQUOI : les étapes
   ============================================================= */
.steps{
  list-style:none;
  margin-top:clamp(56px,10vh,110px);
  display:grid; gap:0;
  border-top:1px solid var(--line);
}
.step{
  display:grid;
  grid-template-columns:minmax(160px,240px) 1fr;
  gap:clamp(18px,5vw,64px);
  padding:clamp(26px,4.2vh,40px) 0;
  border-bottom:1px solid var(--line);
  align-items:baseline;
  transition:background .5s var(--ease);
}
.step__head{ display:flex; align-items:center; gap:16px; }
.step__icon{
  width:30px; height:30px; flex-shrink:0;
  fill:none; stroke:var(--ink-soft); stroke-width:1.1;
  stroke-linecap:round; stroke-linejoin:round;
  transition:stroke .5s var(--ease), transform .6s var(--ease);
}
.step__icon .dot{ fill:var(--ink); stroke:none; }
.step:hover .step__icon{ stroke:var(--ink); }
.step__idx{
  font-size:clamp(18px,2.2vw,22px); font-weight:400; letter-spacing:-.01em;
  color:var(--ink);
}
.step p{ color:var(--ink-soft); font-size:clamp(15px,1.8vw,17px); max-width:52ch; }
.step:hover{ background:linear-gradient(90deg, rgba(243,242,237,.02), transparent 70%); }

/* =============================================================
   02 — EXPERTISE : la grille
   ============================================================= */
.grid{
  margin-top:clamp(48px,9vh,96px);
  display:grid; grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line); border-left:1px solid var(--line);
}
.card{
  padding:clamp(30px,3.4vw,48px);
  border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  position:relative; overflow:hidden;
  transition:background .5s var(--ease);
}
.card::before{
  content:""; position:absolute; left:0; top:0; width:100%; height:1px;
  background:var(--accent); transform:scaleX(0); transform-origin:left;
  transition:transform .6s var(--ease); opacity:.7;
}
.card:hover{ background:rgba(243,242,237,.02); }
.card:hover::before{ transform:scaleX(1); }
.card h3{
  font-size:clamp(18px,2vw,22px); font-weight:500; letter-spacing:-.02em; line-height:1.25;
  margin-bottom:12px; text-wrap:balance;
}
.card .card__role{
  font-family:var(--mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--ink-soft); margin-bottom:14px;
}
.card p{ color:var(--ink-soft); font-size:15.5px; line-height:1.55; }
.card--quiet{ display:flex; align-items:center; }
.card__aside{ color:var(--ink-faint); font-size:14.5px; }

/* =============================================================
   03 — MODES D'INTERVENTION
   ============================================================= */
.modes{
  margin-top:clamp(48px,9vh,90px);
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:clamp(26px,4vw,60px);
}
.mode{ padding-top:22px; border-top:1px solid var(--line); }
.mode__k{
  display:block;
  font-size:clamp(17px,1.9vw,20px); font-weight:500; letter-spacing:-.01em;
  color:var(--ink); margin-bottom:12px;
}
.mode p{ color:var(--ink-soft); font-size:15px; line-height:1.55; }
.mode p a{ color:var(--ink); border-bottom:1px solid var(--line); transition:border-color .3s var(--ease); }
.mode p a:hover{ border-color:rgba(243,242,237,.4); }

/* =============================================================
   04 — COMMENT PENSE Y : géométrie → Y
   ============================================================= */
.think{
  width:clamp(240px,44vw,440px); aspect-ratio:1;
  margin:clamp(40px,7vh,72px) auto clamp(20px,4vh,40px);
}
.think__svg{ width:100%; height:100%; overflow:visible; }
.think__svg .draw{
  fill:none; stroke:var(--ink); stroke-width:1;
  vector-effect:non-scaling-stroke;
  stroke-dasharray:1; stroke-dashoffset:1; opacity:0;
}
.think__y path{
  fill:none; stroke:var(--ink); stroke-width:8;
  stroke-linecap:butt; stroke-linejoin:round;
  stroke-dasharray:1; stroke-dashoffset:1; opacity:0;
}
/* dessin de la complexité quand la section entre dans le viewport */
.think.is-in .think__complex .draw{
  opacity:.34; stroke-dashoffset:0;
  transition:opacity 1.2s var(--ease-soft), stroke-dashoffset 2.2s var(--ease-soft);
}
.think.is-in .think__complex .draw:nth-child(2){ transition-delay:.1s; }
.think.is-in .think__complex .draw:nth-child(3){ transition-delay:.2s; }
.think.is-in .think__complex .draw:nth-child(4){ transition-delay:.3s; }
.think.is-in .think__complex .draw:nth-child(5){ transition-delay:.4s; }
.think.is-in .think__complex .draw:nth-child(n+6){ transition-delay:.5s; }
/* apparition du Y */
.think.is-in .think__y path{
  opacity:1; stroke-dashoffset:0;
  transition:opacity .05s linear 2s, stroke-dashoffset 1.6s var(--ease) 2s;
}
/* dissolution de la complexité : ne reste que le Y + traces */
.think.is-resolved .think__complex .draw{
  opacity:.07; transition:opacity 2.4s var(--ease-soft);
}

/* =============================================================
   05 — PREUVES
   ============================================================= */
.section--proof{ background:var(--bg-2); }
.proofs{ margin-top:clamp(52px,9vh,96px); border-top:1px solid var(--line); }
.proof{
  display:grid; grid-template-columns:minmax(0, .9fr) minmax(0, 1.1fr);
  gap:clamp(32px,7vw,100px);
  padding:clamp(36px,6vh,70px) 0;
  border-bottom:1px solid var(--line);
}
.proof__transfer{
  font-size:clamp(21px,2.5vw,31px); font-weight:400; line-height:1.18; letter-spacing:-.025em;
}
.proof__transfer .ar{ color:var(--accent); margin-inline:5px; }
.proof__body{ padding-left:clamp(0px,3vw,40px); border-left:1px solid var(--line); }
.proof__impasse,
.proof__result{ color:var(--ink-soft); font-size:16px; line-height:1.62; }
.proof__impasse::before,
.proof__result::before{
  display:block; margin-bottom:12px;
  font-family:var(--mono); font-size:10.5px; letter-spacing:.13em; text-transform:uppercase;
}
.proof__impasse::before{ content:"Impasse"; color:var(--ink-faint); }
.proof__result{ margin-top:28px; }
.proof__result::before{ content:"Résultat"; color:var(--accent); }
.proof__role{ margin-top:22px; color:var(--ink-faint); font-family:var(--mono); font-size:11px; letter-spacing:.04em; }

/* =============================================================
   06 — À PROPOS
   ============================================================= */
.about{ margin-top:clamp(40px,7vh,72px); display:grid; gap:clamp(20px,3vh,30px); max-width:60ch; }
.about__lead{ font-size:clamp(16px,2vw,20px); color:var(--ink-soft); line-height:1.65; }
.facts{
  list-style:none; margin-top:clamp(20px,4vh,36px);
  display:grid; gap:0; border-top:1px solid var(--line); max-width:none;
}
.facts li{
  display:grid; grid-template-columns:minmax(120px,190px) 1fr; gap:clamp(16px,4vw,48px);
  padding:20px 0; border-bottom:1px solid var(--line); align-items:baseline;
}
.facts__k{ font-size:clamp(16px,2vw,20px); font-weight:500; letter-spacing:-.02em; color:var(--ink); }
.facts__v{ color:var(--ink-soft); font-size:15.5px; }

/* =============================================================
   06 — CONTACT
   ============================================================= */
.section--contact{ padding-block:clamp(120px,22vh,240px); }
.mail{
  display:inline-block; margin-top:clamp(34px,6vh,56px);
  font-size:clamp(18px,3vw,30px); font-weight:400; letter-spacing:-.02em;
  color:var(--ink);
  padding-bottom:6px; position:relative;
}
.mail::after{
  content:""; position:absolute; left:0; bottom:0; width:100%; height:1px;
  background:var(--ink); transform:scaleX(.0); transform-origin:left;
  transition:transform .5s var(--ease);
}
.mail:hover{ color:var(--accent); }
.mail:hover::after{ transform:scaleX(1); background:var(--accent); }

.contact__note{
  margin:clamp(26px,4.5vh,40px) auto 0;
  max-width:44ch;
  font-size:14px; color:var(--ink-faint); line-height:1.6;
}

/* =============================================================
   FOOTER
   ============================================================= */
.footer{ padding:clamp(50px,8vh,80px) 0; border-top:1px solid var(--line-2); }
.footer__inner{ display:flex; align-items:flex-end; justify-content:space-between; gap:30px; flex-wrap:wrap; }
.footer__brand{ display:flex; align-items:center; gap:12px; font-size:15px; font-weight:500; }
.footer__brand .mark{ width:30px; height:30px; }
.footer__meta{ font-size:13px; color:var(--ink-soft); line-height:1.6; text-align:right; }
.footer__link{ color:var(--ink-soft); border-bottom:1px solid var(--line); transition:color .3s var(--ease), border-color .3s var(--ease); }
.footer__link:hover{ color:var(--ink); border-color:rgba(243,242,237,.35); }
.footer__right{ display:flex; flex-direction:column; align-items:flex-end; gap:16px; }
.footer__nav{ display:flex; flex-wrap:wrap; justify-content:flex-end; gap:clamp(16px,2vw,28px); font-size:13.5px; letter-spacing:.01em; }
.footer__nav a{ color:var(--ink-soft); transition:color .3s var(--ease); }
.footer__nav a:hover{ color:var(--ink); }

/* =============================================================
   RÉVÉLATIONS AU SCROLL
   ============================================================= */
.js .reveal{ opacity:0; transform:translateY(20px); }
.js .reveal.is-in{
  opacity:1; transform:none;
  transition:opacity 1s var(--ease), transform 1s var(--ease);
}
/* légère cascade pour les éléments d'une même liste/grille */
.steps .step.is-in{ transition-delay:.05s; }
.grid .card:nth-child(2).is-in{ transition-delay:.06s; }
.grid .card:nth-child(3).is-in{ transition-delay:.12s; }
.grid .card:nth-child(5).is-in{ transition-delay:.06s; }
.grid .card:nth-child(6).is-in{ transition-delay:.12s; }

/* =============================================================
   INTRO — scène WebGL
   ============================================================= */
.intro{
  position:fixed; inset:0; z-index:200;
  background:var(--bg);
  overflow:hidden;
  transition:opacity 1.1s var(--ease-soft);
  pointer-events:none;
}
.intro.is-gone{ opacity:0; pointer-events:none; }
.intro--off{ display:none; }

.intro__canvas{ position:absolute; inset:0; width:100%; height:100%; display:block; }

/* léger vignettage pour la profondeur */
.intro__vignette{
  position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(120% 100% at 50% 46%, transparent 42%, rgba(0,0,0,.55) 100%);
}

/* bouton passer */
.intro__skip{
  position:absolute; bottom:26px; right:26px; z-index:2;
  background:rgba(10,10,12,.35); backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px);
  border:1px solid var(--line); border-radius:100px;
  color:var(--ink-soft); font:inherit; font-size:12px; letter-spacing:.06em;
  padding:9px 16px; cursor:pointer;
  transition:color .3s var(--ease), border-color .3s var(--ease), opacity .8s var(--ease) 1.2s;
  opacity:0;
  pointer-events:auto;
}
.intro__skip{ opacity:1; }
.intro.is-gone .intro__skip{ opacity:0; transition-delay:0s; }
.intro__skip:hover{ color:var(--ink); border-color:rgba(243,242,237,.3); }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width:860px){
  .grid{ grid-template-columns:repeat(2,1fr); }
  .modes{ grid-template-columns:1fr; gap:0; }
  .modes .mode{ margin-top:0; }
}
@media (max-width:640px){
  .nav{ flex-wrap:wrap; }
  .nav__toggle{
    display:inline-flex; align-items:center; justify-content:center;
    min-height:36px; padding:0 11px;
    color:var(--ink); background:transparent; border:1px solid var(--line); border-radius:100px;
    font:500 11px/1 var(--mono); letter-spacing:.06em; text-transform:uppercase; cursor:pointer;
  }
  .nav__links{
    display:none; width:100%; margin-top:12px; padding:14px;
    flex-direction:column; align-items:flex-start; gap:12px;
    background:rgba(10,10,11,.94); border:1px solid var(--line-2); border-radius:12px;
  }
  .nav.is-open .nav__links{ display:flex; }
  .grid{ grid-template-columns:1fr; }
  .step{ grid-template-columns:1fr; gap:8px; }
  .proof{ grid-template-columns:1fr; gap:28px; }
  .proof__body{ padding-left:0; padding-top:28px; border-left:0; border-top:1px solid var(--line-2); }
  .facts li{ grid-template-columns:1fr; gap:4px; }
  .hero__equation{ flex-direction:row; }
  .footer__inner{ flex-direction:column; align-items:flex-start; }
  .footer__right{ align-items:flex-start; }
  .footer__nav{ justify-content:flex-start; }
  .footer__meta{ text-align:left; }
}

/* =============================================================
   ACCESSIBILITÉ — mouvement réduit
   ============================================================= */
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition-duration:.01ms !important; }
  .reveal,.eq,.hero__lede,.hero__role,.hero__for,.hero__actions{ opacity:1 !important; transform:none !important; }
  .logo .draw,.think__svg .draw,.think__y path{ stroke-dashoffset:0 !important; }
  .hero__logo .logo__y path{ opacity:1 !important; }
  .hero__logo .logo__circles circle{ opacity:.1 !important; }
  .think__y path{ opacity:1 !important; }
  .scroll-hint span{ animation:none; }
}