/* ============================================================
   SCALAB — base.css
   Styles COMMUNS à toutes les pages (accueil + futures pages pôles).
   Contient : variables de marque, reset, curseur custom, navigation,
   pied de page, typographie de base, fonds décoratifs.
   Les styles spécifiques à l'accueil sont dans home.css.
   ============================================================ */

/* ---- Variables de marque ---- */
:root{
  --bg:#070512;
  --bg2:#0c0a1c;
  --ink:#ece9f7;
  --muted:#a79fc4;
  --v1:#7c3aed;        /* violet profond */
  --v2:#9d5cff;        /* violet clair */
  --v3:#5b21b6;        /* violet sombre */
  --accent:#b9a3ff;
  --line:rgba(124,58,237,0.16);
  --card:rgba(124,58,237,0.05);
  --disp:'Archivo',sans-serif;
  --mono:'Chakra Petch',sans-serif;
  --maxw:1080px;
  --cursor:#9d5cff;    /* couleur du curseur (pilotée en JS selon la section) */
}

/* ---- Reset ---- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:0}
body{background:var(--bg);color:var(--ink);font-family:var(--disp);overflow-x:hidden;line-height:1.5;cursor:none}

/* ---- Curseur custom (désactivé sur tactile) ---- */
.cursor{position:fixed;top:0;left:0;width:9px;height:9px;border-radius:50%;background:var(--cursor,#9d5cff);box-shadow:0 0 12px var(--cursor,#9d5cff);pointer-events:none;z-index:9999;transform:translate(-50%,-50%);transition:width .2s,height .2s,background .6s ease,box-shadow .6s ease}
.cursor-ring{position:fixed;top:0;left:0;width:34px;height:34px;border:1px solid var(--cursor,#9d5cff);border-radius:50%;pointer-events:none;z-index:9998;transform:translate(-50%,-50%);opacity:.5;transition:width .25s,height .25s,border-color .6s ease,opacity .25s}
.cursor.hov{width:5px;height:5px}
.cursor-ring.hov{width:54px;height:54px;opacity:.9}
@media(hover:none),(max-width:860px){.cursor,.cursor-ring{display:none}body{cursor:auto}}
/* champs de saisie : on rétablit le curseur texte natif par-dessus le curseur custom */
input,textarea{cursor:text}

/* ---- Fonds décoratifs (halos + grain) ---- */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(55vw 55vw at 82% -8%, rgba(124,58,237,0.20), transparent 60%),
    radial-gradient(45vw 45vw at -8% 40%, rgba(91,33,182,0.16), transparent 60%),
    radial-gradient(40vw 40vw at 50% 120%, rgba(157,92,255,0.12), transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.28;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode:overlay;
}
.wrap{position:relative;z-index:2}

/* ---- Navigation : 3 zones (gauche, centre, droite) ---- */
nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;
  padding:16px clamp(20px,4vw,40px);
  background:rgba(7,5,18,0.55);backdrop-filter:blur(14px);
  gap:24px;
}
/* Zone GAUCHE (logo) : ne pousse pas */
nav .logo{flex:0 0 auto}
/* Zone CENTRE (liens) : prend tout l'espace dispo, centré */
nav .navlinks{flex:1 1 auto;justify-content:center}
/* Zone DROITE (globe + CTA) : se colle au bord */
nav .lang-switcher{flex:0 0 auto;margin-left:auto}
nav .navcta{flex:0 0 auto}
/* Le burger mobile reste à droite */
nav .burger{flex:0 0 auto;margin-left:auto}
.logo{font-family:var(--disp);font-weight:700;font-size:21px;letter-spacing:-.01em;display:flex;align-items:center;gap:11px;color:#fff}
.logo .mk{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;color:var(--v2);filter:drop-shadow(0 0 10px rgba(157,92,255,.5));flex-shrink:0;transition:transform .6s ease}
.logo:hover .mk{transform:rotate(45deg)}
.logo .mk svg{width:100%;height:100%}
.logo .wm{font-weight:700;letter-spacing:-.005em}
.logo .wm b{color:var(--v2);font-weight:700}
.navlinks{display:flex;gap:34px;font-size:13.5px;font-family:var(--mono);letter-spacing:.02em;color:var(--muted)}
.navlinks a{color:inherit;text-decoration:none;transition:.25s;position:relative}
.navlinks a:hover{color:var(--ink)}
.navlinks a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--v2);transition:.3s}
.navlinks a:hover::after{width:100%}
.navcta{font-family:var(--mono);border:1px solid var(--line);padding:10px 18px;font-size:12.5px;letter-spacing:.04em;color:var(--ink);text-decoration:none;transition:.3s;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px)}
.navcta:hover{background:var(--v1);border-color:var(--v1);box-shadow:0 0 24px rgba(124,58,237,.5)}

/* ---- Burger (mobile uniquement) ---- */
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border:1px solid var(--line);background:rgba(124,58,237,.08);cursor:pointer;padding:0 10px;z-index:60}
.burger span{display:block;height:2px;width:100%;background:var(--ink);transition:.3s;transform-origin:center}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{position:fixed;inset:0;z-index:55;background:rgba(7,5,18,0.96);backdrop-filter:blur(20px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:30px;opacity:0;pointer-events:none;transition:opacity .35s ease}
.mobile-menu.open{opacity:1;pointer-events:auto}
.mobile-menu a{font-family:var(--mono);font-size:24px;letter-spacing:.04em;color:var(--ink);text-decoration:none;transition:.25s;opacity:.85}
.mobile-menu a:hover,.mobile-menu a:active{color:var(--v2);opacity:1}
.mobile-menu .navcta{font-size:14px;margin-top:10px;padding:14px 26px}

/* ---- Boutons (réutilisables) ---- */
.btn{font-family:var(--mono);padding:16px 30px;font-size:14px;letter-spacing:.03em;font-weight:600;text-decoration:none;transition:.3s;display:inline-flex;align-items:center;gap:10px;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.btn-p{background:linear-gradient(100deg,var(--v3),var(--v1));color:#fff;box-shadow:0 8px 40px rgba(124,58,237,.4)}
.btn-p:hover{transform:translateY(-3px);box-shadow:0 14px 50px rgba(124,58,237,.6)}
.btn-g{border:1px solid var(--line);color:var(--ink)}
.btn-g:hover{border-color:var(--v2);background:rgba(124,58,237,.08)}

/* ---- Sections génériques ---- */
section{padding:clamp(90px,13vh,170px) clamp(20px,5vw,64px);position:relative;overflow:hidden}
.reveal{opacity:0;transform:translateY(50px);transition:1s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
.sectag{font-family:var(--mono);font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--v2);margin-bottom:18px;display:flex;align-items:center;gap:14px}
.sectag::before{content:"";width:40px;height:1px;background:var(--v2)}
.sectitle{font-size:clamp(30px,4.6vw,58px);font-weight:800;letter-spacing:-.03em;max-width:18ch;line-height:1.04}

/* ---- Pied de page ---- */
footer{border-top:1px solid var(--line);padding:60px clamp(20px,5vw,64px) 40px;position:relative;z-index:2}
.fgrid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;align-items:flex-start;max-width:var(--maxw);margin:0 auto}
.fcol h4{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--v2);margin-bottom:14px}
.fcol a,.fcol p{display:block;color:var(--muted);text-decoration:none;font-size:14px;margin-bottom:9px;transition:.25s}
.fcol a:hover{color:var(--ink)}
.fbottom{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-family:var(--mono);font-size:12.5px;color:var(--muted);max-width:var(--maxw);margin-left:auto;margin-right:auto}

/* ---- Canvas de section (commun) ---- */
canvas.sect-canvas{position:absolute;top:0;height:100%;left:50%;width:100vw;transform:translateX(-50%);z-index:0;pointer-events:none;will-change:contents}
/* Blindage : aucun canvas n'intercepte jamais les clics, où qu'il soit dans le DOM */
canvas{pointer-events:none !important}

/* ---- Responsive commun ---- */
@media(max-width:1180px){:root{--maxw:920px}}
@media(max-width:980px){:root{--maxw:100%}}
@media(max-width:860px){.navlinks{display:none}nav>.navcta{display:none}.burger{display:flex}}

/* ============================================================
   Sélecteur de langue (globe discret, à droite du CTA Préinscription)
   ============================================================ */
.lang-switcher{position:relative;display:flex;align-items:center;margin-right:8px}
.lang-btn{display:inline-flex;align-items:center;gap:5px;background:transparent;border:0;color:var(--muted);padding:6px 4px;cursor:pointer;font-family:var(--mono);font-size:11px;letter-spacing:.05em;transition:.2s;opacity:.7}
.lang-btn:hover{color:var(--v2);opacity:1}
.lang-globe{width:14px;height:14px;flex-shrink:0;opacity:.85}
.lang-current{font-weight:500;letter-spacing:.06em;font-size:11px}

.lang-menu{position:absolute;top:calc(100% + 8px);right:0;list-style:none;margin:0;padding:6px;background:rgba(20,15,42,.96);backdrop-filter:blur(14px);border:1px solid var(--line);min-width:160px;z-index:60;opacity:0;visibility:hidden;transform:translateY(-4px);transition:.2s;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.lang-menu.open{opacity:1;visibility:visible;transform:translateY(0)}
.lang-menu li{margin:0;padding:0}
.lang-option{display:flex;align-items:center;gap:12px;width:100%;background:transparent;border:0;color:var(--muted);padding:8px 12px;cursor:pointer;font-family:var(--mono);font-size:12px;text-align:left;transition:.15s;letter-spacing:.02em}
.lang-option:hover{background:rgba(157,92,255,.08);color:var(--ink)}
.lang-option.active{color:var(--v2);background:rgba(157,92,255,.06)}
.lang-option .lang-code{font-weight:700;letter-spacing:.08em;min-width:22px;font-size:11px}
.lang-option .lang-name{font-weight:400}

/* Mobile : encore plus compact */
@media(max-width:860px){
  .lang-switcher{margin-right:10px}
  .lang-btn{padding:6px 2px;font-size:10.5px}
  .lang-current{font-size:10.5px}
  .lang-menu{min-width:150px}
}