:root{
  --bg:#04060a; --ink:#eaf1ff; --sub:#9fb4d8; --accent:#4da3ff;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
body{overflow-x:hidden}

/* Scène fixe : tout se joue ici pendant que #scroll-space fait défiler */
#stage{position:fixed;inset:0;overflow:hidden;background:#000;z-index:1}
#seq{position:absolute;inset:0;width:100%;height:100%;display:block}

/* Still VRAI 4K + loops (feu, cerveau) : en fondu par-dessus le canvas au repos */
#still,.film-live{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:0;transition:opacity .5s ease;pointer-events:none;background:#000}
#still.on,.film-live.on{opacity:1}

/* Overlays texte */
#overlays{position:absolute;inset:0;z-index:3;pointer-events:none}
.ov{position:absolute;left:0;right:0;bottom:12vh;padding:0 clamp(28px,6vw,110px);
  opacity:0;transform:translateY(16px);
  transition:opacity .5s cubic-bezier(.22,1,.36,1),transform .5s cubic-bezier(.22,1,.36,1)}
.ov.on{opacity:1;transform:none}
.ov h2{font-size:clamp(28px,4.6vw,64px);font-weight:600;line-height:1.05;letter-spacing:-.02em;
  max-width:20ch;text-shadow:0 2px 30px rgba(0,0,0,.6)}
.ov p{margin-top:16px;font-size:clamp(15px,1.5vw,20px);color:var(--sub);max-width:52ch;
  text-shadow:0 2px 20px rgba(0,0,0,.6)}

/* Espace de défilement (donne la longueur du scroll) */
#scroll-space{position:relative;z-index:0;width:100%}

/* Écran de chargement */
#loader{position:fixed;inset:0;z-index:50;background:var(--bg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;
  transition:opacity .6s ease}
#loader.hidden{opacity:0;pointer-events:none}
.loader-mark{width:56px;height:56px;border-radius:50%;border:1px solid rgba(120,175,255,.35);
  display:flex;align-items:center;justify-content:center;font-weight:600;letter-spacing:.06em;
  color:var(--accent);font-size:13px}
.loader-track{width:min(240px,60vw);height:2px;background:rgba(120,175,255,.15);border-radius:2px;overflow:hidden}
#bar{height:100%;width:0;background:linear-gradient(90deg,#4da3ff,#8ec9ff);transition:width .2s ease}
#pct{font-size:12px;letter-spacing:.12em;color:var(--sub)}
.loader-hint{position:absolute;bottom:34px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:rgba(159,180,216,.5)}

@media (prefers-reduced-motion:reduce){
  #still,#fire,.ov{transition:none}
}

/* ── Tunnel de code VIVANT (couche 3D au repos sur le keypoint "approche") ── */
#code-tunnel{position:absolute;inset:0;overflow:hidden;opacity:0;transition:opacity .5s ease;
  pointer-events:none;perspective:760px;perspective-origin:50% 48%;z-index:2}
#code-tunnel.on{opacity:1}
#code-tunnel .ct-darken{position:absolute;inset:0;
  background:radial-gradient(circle at 50% 48%, rgba(2,4,10,0) 6%, rgba(2,4,10,.55) 42%, rgba(2,4,10,.9) 78%)}
.ct-world{position:absolute;left:0;top:0;width:100%;height:100%;transform-style:preserve-3d;will-change:transform}
.ct-code{position:absolute;left:50%;top:48%;font:700 16px/1.4 "SF Mono",ui-monospace,"Menlo",monospace;
  color:#cfe2ff;white-space:pre;letter-spacing:.02em;
  text-shadow:0 0 9px rgba(90,150,255,.85),0 0 3px rgba(10,20,45,.95),0 1px 2px rgba(0,0,0,.8);
  transform-origin:50% 50%;pointer-events:none}
.ct-code .k{color:#7fb0ff}.ct-code .s{color:#9fd0a0}.ct-code .n{color:#e0b877}
#code-tunnel .ct-light{position:absolute;left:50%;top:48%;width:120px;height:120px;transform:translate(-50%,-50%);
  border-radius:50%;background:radial-gradient(circle,#fff,rgba(160,205,255,.65) 32%,transparent 72%);
  filter:blur(4px);animation:ct-pulse 3.4s ease-in-out infinite}
@keyframes ct-pulse{0%,100%{opacity:.85;transform:translate(-50%,-50%) scale(1)}
  50%{opacity:1;transform:translate(-50%,-50%) scale(1.12)}}

/* ── 6 expertises : VRAI texte HTML net posé sur les cases vides du keypoint "services" ── */
#services-cards{position:absolute;inset:0;overflow:hidden;opacity:0;transition:opacity .55s ease;
  pointer-events:none;z-index:2}
#services-cards.on{opacity:1}
.svc-card{position:absolute;display:flex;flex-direction:column;justify-content:center}
.svc-card h4{margin:0;font-family:var(--font);font-weight:600;
  font-size:clamp(13px,1.35vw,23px);line-height:1.08;letter-spacing:.005em;
  text-transform:uppercase;color:#eaf2ff;
  text-shadow:0 0 12px rgba(90,150,255,.55),0 1px 3px rgba(0,0,0,.85)}
.svc-card p{margin:.5em 0 0;font-family:var(--font);font-weight:400;
  font-size:clamp(10px,.92vw,14.5px);line-height:1.4;color:#aebfd8;
  text-shadow:0 1px 3px rgba(0,0,0,.85)}
/* cartes de droite : icône à droite → texte cadré à gauche de l'icône */
.svc-card.svc-r{text-align:left}
@media (max-width:760px){
  .svc-card h4{font-size:3.1vw}
  .svc-card p{font-size:2.15vw}
}

/* ── Indicateur de keypoints (navigation verrouillée) ── */
#kp-nav{position:fixed;right:clamp(14px,2vw,30px);top:50%;transform:translateY(-50%);
  z-index:40;display:flex;flex-direction:column;gap:14px}
.kp-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;cursor:pointer;background:rgba(160,190,240,.26);
  transition:transform .35s cubic-bezier(.22,1,.36,1),background .35s ease,box-shadow .35s ease;
  -webkit-appearance:none;appearance:none}
.kp-dot:hover{background:rgba(160,190,240,.6);transform:scale(1.25)}
.kp-dot.on{background:var(--accent);transform:scale(1.4);box-shadow:0 0 10px 1px rgba(90,150,255,.55)}
@media (max-width:820px){#kp-nav{gap:11px;right:12px}.kp-dot{width:7px;height:7px}}