/* ============================================================
   BIFA INSTITUTE — CHROME GLOBAL (header + méga-menu + footer)
   Composant autonome et namespacé (.bn-*, .bf-*) afin de pouvoir
   être posé sur le site institutionnel ET sur les landing pages
   Formation sans jamais entrer en collision avec leurs styles
   propres (.navbar / .site-header / .nav-links / .burger…).
   Charte : Navy #081C33 · Bleu #29ABE2 · Inter
   ============================================================ */

.bifa-chrome{
  --bn-navy:#081C33;
  --bn-navy-2:#0A2540;
  --bn-panel:#0C2440;
  --bn-blue:#29ABE2;
  --bn-blue-deep:#198ECE;
  /* Bleus calibrés WCAG AA, repris du système des landing pages :
     --bn-cta  = fond de bouton portant du texte blanc (4,6:1)
     --bn-accent = petit texte d'accent sur fond clair     (5,0:1) */
  --bn-cta:#1179B4;
  --bn-accent:#0F6FA6;
  --bn-ink:#12263F;
  --bn-line:rgba(255,255,255,.12);
  --bn-txt:#D7E2EE;
  --bn-muted:#9DB2C8;
  --bn-h:74px;
  --bn-ease:cubic-bezier(.22,.61,.2,1);
  --bn-font:"Inter",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- Barre principale ---------- */
.bn{
  position:fixed;top:0;left:0;right:0;z-index:1200;
  font-family:var(--bn-font);
  background:rgba(8,28,51,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .35s var(--bn-ease),border-color .35s var(--bn-ease),box-shadow .35s var(--bn-ease);
}
.bn.is-scrolled{background:rgba(8,28,51,.96);border-bottom-color:var(--bn-line);box-shadow:0 10px 30px -22px rgba(0,0,0,.75)}
.bn.is-open{background:rgba(8,28,51,.98)}
.bn-inner{
  position:relative;                       /* référence du méga-menu */
  width:min(1160px,92%);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  height:var(--bn-h);
}
.bn-brand{display:flex;align-items:center;flex:none}
.bn-brand img{height:38px;width:auto;display:block}

/* ---------- Liens ---------- */
.bn-menu{display:flex;align-items:center;gap:26px;list-style:none;margin:0;padding:0}
.bn-menu>li{position:relative}
/* L'élément porteur du méga-menu reste statique : le panneau se
   positionne alors sur .bn-inner et occupe la largeur voulue. */
.bn-menu>li.bn-has-mega{position:static}
.bn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--bn-txt);font-size:.9rem;font-weight:500;line-height:1;
  padding:9px 0;background:none;border:0;cursor:pointer;
  font-family:inherit;text-decoration:none;position:relative;
}
.bn-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;
  background:var(--bn-blue);transition:right .3s var(--bn-ease);
}
.bn-link:hover,.bn-link[aria-expanded="true"],.bn-link.is-current{color:#fff}
.bn-link:hover::after,.bn-link[aria-expanded="true"]::after,.bn-link.is-current::after{right:0}
.bn-caret{width:9px;height:9px;flex:none;transition:transform .3s var(--bn-ease)}
.bn-link[aria-expanded="true"] .bn-caret{transform:rotate(180deg)}
.bn-pill{
  color:#fff;font-weight:700;background:linear-gradient(135deg,var(--bn-blue-deep),var(--bn-blue));
  padding:8px 16px;border-radius:22px;font-size:.86rem;
  box-shadow:0 6px 18px -8px rgba(41,171,226,.8);
  transition:transform .3s var(--bn-ease),box-shadow .3s var(--bn-ease);
}
.bn-pill::after{display:none}
.bn-pill:hover{transform:translateY(-2px);box-shadow:0 12px 26px -10px rgba(41,171,226,.9)}
.bn-end{display:flex;align-items:center;gap:14px;flex:none}

/* ---------- Méga-menu Formations ----------
   position:absolute + opacity/transform : aucune réservation de
   place, donc aucun décalage de page à l'ouverture.           */
.bn-mega{
  /* Ancré sur .bn-inner (et non sur le déclencheur) : le panneau
     reste toujours dans les limites du conteneur, à toute largeur. */
  position:absolute;top:calc(var(--bn-h) - 12px);left:0;
  width:min(920px,100%);
  transform:translateY(-8px);
  background:#fff;color:var(--bn-ink);
  border-radius:12px;
  box-shadow:0 40px 90px -30px rgba(6,20,38,.55),0 2px 6px rgba(6,20,38,.12);
  padding:26px;
  display:grid;grid-template-columns:1.55fr .95fr;gap:26px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s var(--bn-ease),transform .24s var(--bn-ease),visibility .24s;
  z-index:5;
}
.bn-mega::before{                          /* liseré d'accroche discret */
  content:"";position:absolute;top:0;left:26px;right:26px;height:3px;
  background:linear-gradient(90deg,var(--bn-blue-deep),var(--bn-blue));
  border-radius:0 0 3px 3px;
}
.bn-has-mega.is-open .bn-mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.bn-mega-t{
  font-size:10.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--bn-accent);margin:0 0 14px;
}
.bn-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;list-style:none;margin:0;padding:0}
.bn-f{
  display:flex;align-items:center;gap:11px;padding:8px 10px;border-radius:8px;
  color:var(--bn-ink);text-decoration:none;
  transition:background .22s var(--bn-ease),transform .22s var(--bn-ease);
}
.bn-f:hover,.bn-f:focus-visible{background:#F1F6FB;transform:translateX(2px)}
.bn-f-ico{
  width:34px;height:34px;flex:none;border-radius:7px;overflow:hidden;
  background:#F5F8FB;border:1px solid #E3E9F0;
  display:flex;align-items:center;justify-content:center;
}
.bn-f-ico img{width:100%;height:100%;object-fit:contain;padding:3px}
.bn-f b{display:block;font-size:.86rem;font-weight:600;line-height:1.25}
.bn-f span{display:block;font-size:.73rem;color:#5B7086;line-height:1.3;margin-top:1px}  /* 5,1:1 — AA */
.bn-side{background:#F5F8FB;border-radius:10px;padding:22px;display:flex;flex-direction:column}
.bn-side p{flex:0 0 auto}
.bn-side .bn-cta{margin-top:auto}   /* les appels à l'action tiennent le bas de la colonne */
.bn-side h4{font-size:1rem;margin:0 0 8px;color:var(--bn-navy-2);font-weight:700;line-height:1.3}
.bn-side p{font-size:.82rem;color:#556B7E;margin:0 0 16px;line-height:1.55}
.bn-side .bn-cta{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  background:var(--bn-cta);color:#fff;font-weight:600;font-size:.85rem;
  padding:12px 18px;border-radius:6px;text-decoration:none;
  transition:background .25s,transform .25s var(--bn-ease);
}
.bn-side .bn-cta:hover{background:var(--bn-blue-deep);transform:translateY(-2px)}
.bn-side .bn-cta2{
  margin-top:10px;text-align:center;font-size:.8rem;color:var(--bn-accent);
  text-decoration:none;font-weight:600;padding:8px;
}
.bn-side .bn-cta2:hover{text-decoration:underline}

/* ---------- Burger ---------- */
.bn-burger{
  display:none;width:42px;height:42px;flex:none;
  background:none;border:0;cursor:pointer;position:relative;z-index:2;
}
.bn-burger span{
  display:block;width:23px;height:2px;background:#fff;margin:5px auto;border-radius:2px;
  transition:transform .32s var(--bn-ease),opacity .2s var(--bn-ease);
}
.bn-burger.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.bn-burger.is-active span:nth-child(2){opacity:0}
.bn-burger.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Panneau mobile ---------- */
@media (max-width:1023px){
  .bifa-chrome{--bn-h:66px}
  .bn-burger{display:block}
  .bn-end .bn-pill{display:none}
  .bn-nav{
    position:fixed;top:var(--bn-h);left:0;right:0;bottom:0;
    background:var(--bn-navy);
    padding:14px 0 40px;overflow-y:auto;overscroll-behavior:contain;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity .26s var(--bn-ease),transform .26s var(--bn-ease),visibility .26s;
    -webkit-overflow-scrolling:touch;
  }
  .bn.is-open .bn-nav{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .bn-menu{flex-direction:column;align-items:stretch;gap:0;width:min(1160px,92%);margin-inline:auto}
  .bn-menu>li{border-bottom:1px solid rgba(255,255,255,.08)}
  .bn-link{width:100%;justify-content:space-between;padding:16px 2px;font-size:1.02rem;font-weight:600;color:#fff}
  .bn-link::after{display:none}
  .bn-pill{
    display:inline-flex;margin:14px 0;border-radius:22px;width:auto;
    justify-content:center;padding:11px 22px;
  }
  /* sous-menu = accordéon, hauteur animée sans à-coup */
  .bn-mega{
    position:static;top:auto;transform:none;width:auto;
    display:block;background:transparent;box-shadow:none;padding:0;
    opacity:1;visibility:visible;pointer-events:auto;
    max-height:0;overflow:hidden;
    transition:max-height .32s var(--bn-ease);
  }
  .bn-mega::before{display:none}
  .bn-has-mega.is-open .bn-mega{max-height:1400px}
  .bn-mega-t{display:none}
  .bn-grid{grid-template-columns:1fr;gap:0;padding-bottom:8px}
  .bn-f{padding:11px 2px;color:var(--bn-txt);border-radius:6px}
  .bn-f:hover,.bn-f:focus-visible{background:rgba(255,255,255,.06);transform:none}
  .bn-f b{color:#fff;font-weight:500}
  .bn-f span{color:var(--bn-muted)}
  .bn-f-ico{width:30px;height:30px;background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.14)}
  .bn-side{background:rgba(255,255,255,.05);margin:6px 0 14px;padding:16px}
  .bn-side h4{color:#fff}
  .bn-side p{color:var(--bn-muted)}
  /* Sur le panneau sombre, le bleu d'accent clair est repris :
     #0F6FA6 ne tiendrait pas le contraste AA sur fond navy. */
  .bn-side .bn-cta2{color:#8FD0F2}
}
@media (min-width:1024px){
  .bn-nav{display:block}
}

/* ---------- Barre secondaire « Formations » ---------- */
.fmn{
  position:sticky;top:var(--bn-h,74px);z-index:900;
  font-family:var(--bn-font);
  background:rgba(255,255,255,.93);
  -webkit-backdrop-filter:saturate(140%) blur(10px);backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid #E3E9F0;
}
.fmn-inner{
  width:min(1180px,100%);margin-inline:auto;
  padding-inline:clamp(20px,5vw,40px);
  display:flex;align-items:center;gap:18px;height:52px;
}
.fmn-label{
  flex:none;font-size:10px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:#0A4470;padding-right:16px;border-right:1px solid #E3E9F0;
}
.fmn-scroll{
  flex:1;min-width:0;display:flex;align-items:center;gap:6px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
  -webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 34px),transparent);
  mask-image:linear-gradient(90deg,#000 calc(100% - 34px),transparent);
}
.fmn-scroll::-webkit-scrollbar{display:none}
.fmn-scroll a{
  flex:none;scroll-snap-align:start;white-space:nowrap;
  font-size:.82rem;font-weight:500;color:#4C6274;  /* 5,7:1 — AA */text-decoration:none;
  padding:7px 13px;border-radius:20px;border:1px solid transparent;
  transition:color .22s,background .22s,border-color .22s;
}
.fmn-scroll a:hover{color:#0A4470;background:#F1F6FB}
.fmn-scroll a[aria-current="page"]{
  color:#0A4470;font-weight:600;background:#E9F1F8;border-color:#C6DCEC;
}
.fmn-all{
  flex:none;font-size:.8rem;font-weight:600;color:#1179B4;text-decoration:none;
  display:inline-flex;align-items:center;gap:6px;padding-left:16px;border-left:1px solid #E3E9F0;
}
.fmn-all:hover{text-decoration:underline}
@media (max-width:860px){
  .fmn-inner{height:48px;gap:12px}
  .fmn-label,.fmn-all span{display:none}
  .fmn-all{padding-left:10px}
}

/* ---------- Emplacement logo de la formation ---------- */
.f-logo{
  display:flex;align-items:center;gap:14px;
  padding-bottom:16px;margin-bottom:16px;
  border-bottom:1px solid #DDE7EF;
}
.f-logo-box{
  flex:none;
  width:84px;height:84px;              /* conteneur STABLE : le logo peut être */
  border-radius:8px;                    /* plus large ou plus haut, il s'adapte */
  background:#F5F8FB;border:1px solid #E3E9F0;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding:8px;
}
.f-logo-box img{
  max-width:100%;max-height:100%;width:auto;height:auto;
  object-fit:contain;object-position:center;display:block;
}
.f-logo-txt b{
  display:block;font-size:.78rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:#0A4470;line-height:1.35;
}
.f-logo-txt span{
  display:block;font-size:.76rem;color:#556B7E;margin-top:3px;line-height:1.45;
}
@media (max-width:520px){
  .f-logo-box{width:66px;height:66px;padding:6px}
  .f-logo-txt b{font-size:.72rem}
}

/* ---------- Pied de page global ---------- */
.bf{
  background:#061527;color:#9DB2C8;font-family:var(--bn-font);
  padding:clamp(48px,6vw,72px) 0 26px;font-size:14px;
}
.bf-in{width:min(1160px,92%);margin-inline:auto}
.bf-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;align-items:start}
.bf-brand img{height:40px;width:auto;margin-bottom:16px}
.bf-motto{color:#fff;font-weight:500;margin:0 0 14px;line-height:1.6}
.bf-brand p{margin:0;line-height:1.75}
.bf-brand a{color:inherit;text-decoration:none}
.bf-brand a:hover{color:#fff}
.bf h4{
  color:#fff;font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  margin:0 0 14px;
}
.bf ul{list-style:none;margin:0;padding:0}
.bf li{margin-bottom:9px}
.bf li a{color:#9DB2C8;text-decoration:none;transition:color .22s}
.bf li a:hover{color:var(--bn-blue,#29ABE2)}
.bf-bottom{
  margin-top:clamp(32px,4vw,48px);padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:12.5px;
}
.bf-social{display:flex;align-items:center;gap:12px}
.bf-social a{
  width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.16);color:#9DB2C8;
  transition:border-color .22s,color .22s,transform .22s var(--bn-ease);
}
.bf-social a:hover{border-color:var(--bn-blue,#29ABE2);color:#fff;transform:translateY(-2px)}
@media (max-width:900px){.bf-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:560px){
  /* Deux colonnes conservées pour les listes : sur mobile, un pied de
     page en une seule colonne ajoutait près de 300 px de défilement. */
  .bf{padding:38px 0 20px}
  .bf-grid{grid-template-columns:1fr 1fr;gap:24px 20px}
  .bf-brand{grid-column:1 / -1}
  .bf-brand img{height:34px;margin-bottom:12px}
  .bf li{margin-bottom:7px;font-size:13.5px}
  .bf-bottom{flex-direction:column;align-items:flex-start;gap:14px;margin-top:26px}
}

/* ---------- Décalage du contenu sous le header fixe ---------- */
.bifa-chrome{padding-top:var(--bn-h)}
.bifa-chrome.bn-overlay{padding-top:0}      /* pages à hero pleine hauteur */

/* ---------- Accessibilité ---------- */
.bn a:focus-visible,.bn button:focus-visible,
.fmn a:focus-visible,.bf a:focus-visible{
  outline:2px solid var(--bn-blue,#29ABE2);outline-offset:3px;border-radius:3px;
}
.bn-skip{
  position:absolute;left:-9999px;top:0;z-index:1300;
  background:#fff;color:#0A2540;padding:12px 20px;font-weight:600;border-radius:0 0 6px 0;
}
.bn-skip:focus{left:0}
body.bn-locked{overflow:hidden}

@media (prefers-reduced-motion:reduce){
  .bn,.bn-mega,.bn-nav,.bn-link::after,.bn-caret,.bn-burger span,
  .bn-f,.bn-side .bn-cta,.bf-social a,.fmn-scroll a{
    transition-duration:.01ms!important;animation:none!important;
  }
  html{scroll-behavior:auto!important}
}