/* =========================================================
   Institut International d'Investissement (3i) : vitrine
   Marque : navy #102854, logo intouchable (sigle, trait, intitulé)
   ========================================================= */
:root{
  /* ===== Marque : couleurs du logo, indépendantes de la charte ===== */
  --brand:#102854;
  --brand-rgb:16,40,84;

  /* ===== Charte « Encre & azur » (retenue par le client) ===== */
  --navy:#12336E;
  --navy-900:#071A3A;
  --navy-800:#0C2450;
  --navy-700:#1E4FA0;
  --navy-600:#2E6AD0;
  --glow-rgb:46,106,208;
  --accent:#4C86E0;
  --accent-light:#A3C6FB;
  --accent-deep:#2A5FB8;
  --accent-rgb:76,134,224;
  --cream:#EDF2FA;
  --paper:#F9FBFE;
  --paper-rgb:249,251,254;
  --ink:#0F1B2E;
  --ink-rgb:15,27,46;
  --slate:#556784;

  /* ===== Dérivés ===== */
  --line:rgba(var(--ink-rgb),.13);
  --line-light:rgba(255,255,255,.14);
  --tint:rgba(var(--ink-rgb),.06);
  --shadow:0 24px 60px -24px rgba(var(--ink-rgb),.35);
  --maxw:1180px;
  --font-serif:"Newsreader",Georgia,"Times New Roman",serif;
  --font-sans:"Hanken Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
  margin:0;font-family:var(--font-sans);color:var(--ink);
  background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{font-family:var(--font-serif);font-weight:500;line-height:1.08;margin:0;letter-spacing:-.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,5vw,48px)}

/* eyebrow */
.eyebrow{
  font-size:.72rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;
  color:var(--accent-deep);display:inline-flex;align-items:center;gap:.7em;
  flex-wrap:wrap;max-width:100%;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--accent)}
.eyebrow.on-dark{color:var(--accent-light)}
.eyebrow.center{justify-content:center}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:.6em;padding:.95em 1.6em;border-radius:999px;
  font-weight:600;font-size:.95rem;letter-spacing:.01em;cursor:pointer;border:1px solid transparent;
  transition:transform .25s ease,background .25s ease,color .25s ease,box-shadow .25s ease;
}
.btn-gold{background:var(--accent);color:var(--navy-900);box-shadow:0 12px 28px -10px rgba(var(--accent-rgb),.6)}
.btn-gold:hover{transform:translateY(-2px);background:var(--accent-light)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{border-color:var(--accent-light);color:var(--accent-light)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{transform:translateY(-2px);background:var(--navy-700)}
.btn-outline{border-color:var(--line);color:var(--navy)}
.btn-outline:hover{border-color:var(--navy);transform:translateY(-2px)}

/* =================== HEADER =================== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .3s ease,box-shadow .3s ease;
  padding:16px 0;
}
.site-header.scrolled{background:rgba(var(--paper-rgb),.85);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line);padding:10px 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px}
/* bloc de marque : la signature complète du logo (sigle, trait, intitulé),
   la même disposition dans le header, le menu mobile et le footer.
   Le trait fait partie du logo, il ne se supprime jamais. */
.brand{display:flex;align-items:center}
.brand img{height:74px;width:auto;transform-origin:left center;transition:transform .3s ease}
.site-header.scrolled .brand img{transform:scale(.73)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:.9rem;font-weight:500;color:rgba(255,255,255,.82);transition:color .2s}
.nav-links a:hover{color:#fff}
.site-header.scrolled .nav-links a{color:var(--slate)}
.site-header.scrolled .nav-links a:hover{color:var(--navy)}
.nav-cta{display:flex;align-items:center;gap:14px}
.menu-btn{display:none;background:none;border:0;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition:.3s}
.site-header.scrolled .menu-btn span{background:var(--navy)}

/* mobile menu */
.mobile-menu{
  position:fixed;inset:0;z-index:60;background:var(--navy-900);
  display:flex;flex-direction:column;justify-content:center;gap:8px;padding:0 40px;
  transform:translateX(100%);transition:transform .4s cubic-bezier(.7,0,.2,1);
}
/* menu ouvert : on masque le header pour éviter que le hamburger chevauche la croix */
body.menu-open .site-header{opacity:0;pointer-events:none}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{font-family:var(--font-serif);font-size:2rem;color:#fff;padding:12px 0;border-bottom:1px solid var(--line-light)}
.mobile-menu a:last-of-type{border:0}
.mobile-menu .mobile-brand{position:absolute;top:24px;left:40px;padding:0;border:0}
.mobile-brand img{height:74px;width:auto}
.mobile-close{position:absolute;top:26px;right:30px;background:none;border:0;color:#fff;font-size:2rem;cursor:pointer}

/* =================== HERO =================== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  background:
    radial-gradient(120% 80% at 80% 10%,rgba(var(--accent-rgb),.18),transparent 55%),
    radial-gradient(90% 70% at 10% 90%,rgba(var(--glow-rgb),.55),transparent 60%),
    linear-gradient(160deg,var(--navy-900),var(--navy) 55%,var(--navy-800));
  color:#fff;overflow:hidden;padding:156px 0 80px;
}
.hero-watermark{
  position:absolute;right:-6vw;bottom:-14vh;font-family:var(--font-serif);
  font-size:min(62vw,880px);font-weight:600;line-height:.8;
  color:rgba(255,255,255,.04);pointer-events:none;user-select:none;letter-spacing:-.04em;
}
.hero .wrap{position:relative;z-index:2;max-width:960px}
.hero h1{
  font-size:clamp(2.7rem,7vw,5.4rem);margin:26px 0 0;font-weight:400;
}
.hero h1 em{font-style:italic;color:var(--accent-light)}
.hero .lead{
  margin-top:26px;font-size:clamp(1.05rem,2vw,1.3rem);color:rgba(255,255,255,.8);
  max-width:640px;font-weight:300;
}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:16px}
.hero-meta{
  margin-top:46px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px 34px;padding-top:26px;
  border-top:1px solid var(--line-light);max-width:820px;
}
.hero-meta .m-num{font-family:var(--font-serif);font-size:1.9rem;color:var(--accent-light);line-height:1}
.hero-meta .m-lab{font-size:.82rem;color:rgba(255,255,255,.6);margin-top:6px;letter-spacing:.02em}

/* rappel « à l'affiche » : l'agenda visible dès l'arrivée sur le site */
.hero-next{
  margin-top:26px;display:inline-flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:11px 20px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid var(--line-light);
  transition:background .25s ease,border-color .25s ease,transform .25s ease;
}
.hero-next:hover{background:rgba(var(--accent-rgb),.12);border-color:rgba(var(--accent-rgb),.5);transform:translateY(-2px)}
.hn-dot{position:relative;width:8px;height:8px;border-radius:50%;background:var(--accent);flex:none}
.hn-dot::after{
  content:"";position:absolute;inset:0;border-radius:50%;border:1px solid var(--accent);
  animation:hn-pulse 2.6s ease-out infinite;
}
@keyframes hn-pulse{
  0%{transform:scale(1);opacity:.7}
  70%{transform:scale(3.2);opacity:0}
  100%{transform:scale(3.2);opacity:0}
}
.hn-label{font-size:.68rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-light)}
.hn-txt{font-size:.92rem;color:rgba(255,255,255,.9)}
.hn-when{font-size:.7rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.55)}
.hn-go{color:var(--accent-light);font-size:1rem;line-height:1}
@media (prefers-reduced-motion:reduce){.hn-dot::after{animation:none;opacity:0}}

/* =================== SECTION base =================== */
section{position:relative}
.section{padding:clamp(80px,11vw,140px) 0}
.section-head{max-width:720px}
.section-head h2{font-size:clamp(2rem,4.4vw,3.2rem);margin-top:20px}
.section-head p{margin-top:20px;color:var(--slate);font-size:1.1rem}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* VISION */
.vision{background:var(--paper)}
.vision-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,90px);align-items:center;margin-top:56px}
.vision-lead{font-family:var(--font-serif);font-size:clamp(1.5rem,2.6vw,2.1rem);color:var(--navy);line-height:1.3;font-weight:400}
.vision-body p{margin-top:22px;color:var(--slate);font-size:1.05rem}
.quote{
  position:relative;padding:2px 0;margin-top:34px;
  font-family:var(--font-serif);font-style:italic;font-size:1.35rem;color:var(--navy);line-height:1.42
}
.quote::before{
  content:"\201C";display:block;font-family:var(--font-serif);font-style:normal;
  font-size:3rem;color:var(--accent);line-height:.2;margin-bottom:.28em
}

/* PILIERS */
.piliers{background:linear-gradient(180deg,var(--cream),var(--paper))}
.pillar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:60px}
.pillar{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:38px 32px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;position:relative;overflow:hidden;
}
.pillar::after{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .4s ease}
.pillar:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.pillar:hover::after{transform:scaleX(1)}
.pillar .p-index{font-family:var(--font-serif);font-size:.9rem;color:var(--accent-deep);letter-spacing:.1em}
.pillar h3{font-size:1.55rem;color:var(--navy);margin-top:14px}
.pillar p{margin-top:14px;color:var(--slate);font-size:1rem}
.pillar .p-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.pillar .p-tags span{font-size:.76rem;color:var(--navy-700);background:var(--tint);padding:5px 12px;border-radius:999px;font-weight:500}

/* PODCAST */
.podcast{
  background:radial-gradient(120% 120% at 15% 15%,rgba(var(--accent-rgb),.14),transparent 50%),linear-gradient(160deg,var(--navy),var(--navy-900));
  color:#fff;
}
.podcast-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,80px);align-items:center}
.podcast-head h2{font-size:clamp(2rem,4.4vw,3.2rem);margin-top:20px}
.podcast-head p{margin-top:22px;color:rgba(255,255,255,.78);font-size:1.08rem}
.podcast-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px}
.podcast-card{
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line-light);border-radius:24px;padding:40px;text-align:center;
  backdrop-filter:blur(6px);
}
.podcast-card .pc-badge{font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-light)}
.podcast-card .pc-title{font-family:var(--font-serif);font-size:2.6rem;margin-top:10px;color:#fff}
.podcast-card .pc-sub{color:rgba(255,255,255,.65);margin-top:10px}
.pc-play{
  width:76px;height:76px;border-radius:50%;background:var(--accent);color:var(--navy-900);
  display:flex;align-items:center;justify-content:center;margin:28px auto 0;
  box-shadow:0 12px 30px -8px rgba(var(--accent-rgb),.6);transition:transform .3s
}
.podcast-card:hover .pc-play{transform:scale(1.08)}

/* DIASPORA / INTERNATIONAL */
.world{background:var(--paper)}
.world-inner{
  background:linear-gradient(160deg,var(--navy),var(--navy-800));border-radius:28px;
  padding:clamp(44px,6vw,80px);color:#fff;position:relative;overflow:hidden;
}
.world-inner .eyebrow{color:var(--accent-light)}
.world-inner h2{font-size:clamp(1.9rem,4vw,2.9rem);margin-top:20px;max-width:640px}
.world-inner p{margin-top:22px;color:rgba(255,255,255,.78);max-width:600px;font-size:1.06rem}
.world-routes{margin-top:40px;display:flex;flex-wrap:wrap;gap:14px}
.route{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.06);border:1px solid var(--line-light);border-radius:999px;padding:10px 20px;font-weight:500}
.route .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-light)}
.world-inner .globe{position:absolute;right:-80px;top:-60px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,rgba(var(--accent-rgb),.35),transparent 60%);filter:blur(4px);pointer-events:none}

/* COMMUNAUTE */
.join{background:linear-gradient(180deg,var(--paper),var(--cream))}
.join-card{
  max-width:760px;margin:0 auto;text-align:center;background:#fff;border:1px solid var(--line);
  border-radius:26px;padding:clamp(40px,6vw,68px);box-shadow:var(--shadow);
}
.join-card h2{font-size:clamp(1.9rem,4vw,2.8rem);color:var(--navy);margin-top:18px}
.join-card p{margin-top:18px;color:var(--slate);font-size:1.05rem}
.join-form{margin-top:34px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.join-form input{
  flex:1;min-width:240px;max-width:360px;padding:1em 1.3em;border-radius:999px;border:1px solid var(--line);
  font-size:1rem;font-family:inherit;color:var(--ink);background:var(--paper);
}
.join-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(var(--accent-rgb),.15)}
.join-note{margin-top:16px;font-size:.85rem;color:var(--slate)}
.join-ok{margin-top:20px;color:var(--accent-deep);font-weight:600;display:none}

/* FOOTER */
.site-footer{background:var(--navy-900);color:rgba(255,255,255,.72);padding:70px 0 34px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.footer-logo{height:130px;width:auto;margin-bottom:24px}
.footer-brand p{max-width:320px;font-size:.95rem;color:rgba(255,255,255,.6)}
.footer-col h4{font-family:var(--font-sans);font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-light);margin:0 0 16px;font-weight:600}
.footer-col a{display:block;font-size:.95rem;color:rgba(255,255,255,.7);padding:6px 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{margin-top:50px;padding-top:24px;border-top:1px solid var(--line-light);display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;font-size:.82rem;color:rgba(255,255,255,.5)}
.footer-disclaimer{max-width:560px;line-height:1.5}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* hero domaines + missions + global opportunities */
.hero-domains{margin-top:18px;font-size:.8rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-light)}
.pillar .p-en{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-deep);margin-top:8px;font-weight:600}
.initiative{margin-top:36px;background:linear-gradient(160deg,rgba(var(--accent-rgb),.16),rgba(255,255,255,.03));border:1px solid var(--line-light);border-radius:18px;padding:26px 28px}
.initiative .i-flag{display:inline-block;width:30px;height:20px;border-radius:3px;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,.35);line-height:0}
.initiative .i-flag svg{display:block}
.initiative h3{font-family:var(--font-serif);font-size:1.5rem;color:#fff;margin-top:8px}
.initiative p{margin-top:10px;color:rgba(255,255,255,.78);font-size:.98rem;max-width:660px}
.initiative .i-soon{display:inline-block;margin-top:16px;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-light)}
.world-note{margin-top:26px;font-size:.82rem;color:rgba(255,255,255,.5);max-width:660px;line-height:1.55}

/* mission : sous-groupes (Parcours & métiers / Développement pro) */
.pillar .p-sub{margin-top:22px;font-size:.76rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--navy)}
.pillar .p-sub + .p-tags{margin-top:10px}

/* podcast : accroche + thématiques */
.pc-tagline{margin-top:14px;font-family:var(--font-serif);font-style:italic;font-size:1.35rem;color:var(--accent-light)}
.pc-themes{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.pc-themes>div{font-size:.95rem;color:rgba(255,255,255,.72);line-height:1.5}
.pc-themes .pc-t{display:inline-block;min-width:76px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.72rem;color:var(--accent-light);margin-right:8px}
.pc-episode{margin-top:22px;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.55)}

/* opportunités internationales : cartes régions */
.world-regions{margin-top:26px;font-size:.76rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-light)}
.opp-grid{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.opp{background:rgba(255,255,255,.05);border:1px solid var(--line-light);border-radius:18px;padding:26px 24px;display:flex;flex-direction:column}
.opp-ico{font-size:1.9rem;line-height:1}
.opp h3{font-family:var(--font-serif);font-size:1.32rem;color:#fff;margin-top:12px}
.opp p{margin-top:10px;color:rgba(255,255,255,.72);font-size:.94rem;flex:1}
.opp-cta{margin-top:18px;font-size:.82rem;font-weight:600;letter-spacing:.03em;color:var(--accent-light);transition:color .2s}
.opp-cta:hover{color:#fff}
.opp-soon{margin-top:18px;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.5)}

/* AGENDA : prochains rendez-vous (podcast, webinaires, rencontres) */
.agenda{background:linear-gradient(180deg,var(--cream),var(--paper))}
.agenda-list{margin-top:52px;border-top:1px solid var(--line)}
.ag-item{
  display:grid;grid-template-columns:190px 1fr;gap:32px;align-items:start;
  padding:30px 16px;border-bottom:1px solid var(--line);
  transition:background .3s ease,box-shadow .3s ease;
}
.ag-item:hover{background:var(--tint);box-shadow:inset 3px 0 0 var(--accent)}
.ag-side{display:flex;flex-direction:column;gap:9px}
.ag-type{font-size:.7rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-deep)}
.ag-when{font-family:var(--font-serif);font-size:1.15rem;color:var(--navy);line-height:1.15}
.ag-item.is-next .ag-when{color:var(--accent-deep)}
.ag-item.is-next .ag-side::before{content:"";width:34px;height:2px;border-radius:2px;background:var(--accent)}
.ag-body h3{font-size:1.45rem;color:var(--navy)}
.ag-body p{margin-top:12px;color:var(--slate);font-size:1.02rem;max-width:680px}
.ag-meta{margin-top:14px;font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--slate);opacity:.85}
.agenda-note{margin-top:28px;font-size:.95rem;color:var(--slate)}
.agenda-note a{color:var(--accent-deep);font-weight:600;border-bottom:1px solid rgba(var(--accent-rgb),.45)}
.agenda-note a:hover{color:var(--navy)}

/* les deux axes prioritaires, dans la section opportunités */
.focus{margin-top:40px;padding-top:34px;border-top:1px solid var(--line-light)}
.focus-grid{margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.focus-item{
  background:linear-gradient(160deg,rgba(var(--accent-rgb),.16),rgba(255,255,255,.03));
  border:1px solid var(--line-light);border-radius:18px;padding:28px 26px;
}
.focus-item h3{font-family:var(--font-serif);font-size:1.36rem;color:#fff}
.focus-item p{margin-top:12px;color:rgba(255,255,255,.78);font-size:.97rem;max-width:none}

/* étiquettes des cartes opportunités */
.opp-tags{margin-top:14px;display:flex;flex-wrap:wrap;gap:7px}
.opp-tags span{
  font-size:.72rem;font-weight:500;color:var(--accent-light);padding:4px 11px;border-radius:999px;
  background:rgba(var(--accent-rgb),.12);border:1px solid rgba(var(--accent-rgb),.28);
}

/* =================== RESPONSIVE =================== */
@media (max-width:900px){
  .nav-links,.nav-cta .btn{display:none}
  .menu-btn{display:block}
  .vision-grid,.podcast-grid{grid-template-columns:1fr;gap:44px}
  .pillar-grid{grid-template-columns:1fr}
  .opp-grid,.focus-grid{grid-template-columns:1fr}
  .ag-item{grid-template-columns:1fr;gap:14px}
  .ag-side{flex-direction:row;align-items:center;gap:14px}
  .ag-item.is-next .ag-side::before{width:20px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .footer-top{grid-template-columns:1fr}
  .hero-meta{grid-template-columns:1fr;gap:22px}
  .brand img{height:58px}
  .site-header.scrolled .brand img{transform:scale(.79)}
  .mobile-brand img{height:62px}
  .footer-logo{height:104px}
  .hero{padding-top:150px}
  .hero{padding:120px 0 70px}
  .hero h1{font-size:clamp(2.1rem,9vw,3rem);overflow-wrap:break-word}
  .hero .lead{font-size:1.02rem}
  .eyebrow{font-size:.66rem;letter-spacing:.14em}
  .join-form input{min-width:100%}
  .hero-next{gap:10px;padding:12px 18px;border-radius:18px}
  .hn-txt{font-size:.86rem;width:100%;order:3}
  .hn-go{margin-left:auto}
}