/* ════════════════════════════════════════════════════════════════════
   site.css — styles communs à toutes les pages (nav, footer, bandeau
   cookies, retour en haut). Les styles propres à une page restent
   inline dans la page, après ce fichier.
   ════════════════════════════════════════════════════════════════════ */

/* BASE */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:#1e2340;color:#fff;line-height:1.65;overflow-x:hidden}
img{max-width:100%;display:block}
:root{
  --marine:#2E3560;--marine-deep:#1e2340;--marine-mid:#3d4578;--marine-light:#e8eaf5;
  --teal:#7ECAC3;--teal-deep:#5aada6;--teal-glow:rgba(126,202,195,0.12);
  --gold:#D4924A;--gold-dim:rgba(212,146,74,.45);--gold-glow:rgba(212,146,74,.1);
  --white:#fff;--off-white:#f0f2f8;--gray-soft:#c8cce0;--gray-mid:#8890b0;
}

/* NAV — :where() garde une spécificité nulle : un `nav{}` de page l'emporte toujours,
   et les autres <nav> (filtres, fil d'Ariane…) ne sont pas touchées (pas de role="navigation") */
:where(nav[role="navigation"]){position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 3rem;height:72px;background:rgba(30,35,64,.97);backdrop-filter:blur(16px);border-bottom:1px solid rgba(126,202,195,.15);transition:background .3s}
.nav-brand{display:flex;align-items:center;gap:.75rem;text-decoration:none}
.nav-picto{width:36px;height:36px;object-fit:contain}
.nav-name{font-family:'Playfair Display',serif;font-weight:700;font-size:1.05rem;color:#fff}
.nav-name em{font-style:italic;color:var(--teal)}
.nav-links{display:flex;gap:1.7rem;list-style:none;align-items:center}
.nav-links a{font-size:.75rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--gray-soft);text-decoration:none;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--teal)}
.nav-links a.nav-mentorat,.mobile-menu a.nav-mentorat{color:var(--teal)}
.nav-cta{background:var(--teal)!important;color:var(--marine)!important;padding:.5rem 1.2rem;border-radius:2px;font-family:'DM Mono',monospace!important;font-size:.68rem!important;font-weight:500!important;transition:background .2s!important}
.nav-cta:hover{background:#fff!important}
.hamburger{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;background:none;border:none;padding:4px;min-width:44px;min-height:44px}
.hamburger span{display:block;width:24px;height:1.5px;background:var(--gray-soft)}
.mobile-menu{display:none;position:fixed;top:72px;left:0;right:0;background:var(--marine);border-bottom:1px solid rgba(126,202,195,.2);padding:1.5rem 2rem;flex-direction:column;align-items:center;justify-content:space-between;gap:1.2rem;z-index:99;height:auto;transition:background .3s}
.mobile-menu.open{display:flex}
.mobile-menu a{font-size:.95rem;color:var(--gray-soft);text-decoration:none;padding-bottom:1rem;border-bottom:1px solid rgba(126,202,195,.1);transition:color .2s}
.mobile-menu a:hover{color:var(--teal)}
.mobile-menu a:last-child{border-bottom:none}
#nav-progress{position:absolute;bottom:0;left:0;height:2px;width:0%;background:linear-gradient(to right,#c07a30,var(--gold));pointer-events:none;transition:width .08s linear;z-index:1}

/* FOOTER */
footer[role="contentinfo"]{background:#10132a;border-top:1px solid rgba(126,202,195,.08)}
.footer-legal{padding:2.8rem 3rem 2rem;display:grid;grid-template-columns:2fr 1.2fr 1fr;gap:3rem;border-bottom:1px solid rgba(126,202,195,.06)}
.fl-ttl{font-family:'DM Mono',monospace;font-size:.54rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(126,202,195,.3);margin-bottom:.9rem}
.fl-row{display:flex;flex-direction:column;gap:.32rem}
.fl-item{font-family:'DM Mono',monospace;font-size:.6rem;letter-spacing:.04em;color:rgba(126,202,195,.2);line-height:1.6}
.fl-item a{color:inherit;text-decoration:none;transition:color .2s}
.fl-item a:hover{color:rgba(126,202,195,.5)}
.fl-item strong{color:rgba(126,202,195,.28);font-weight:500}
.footer-bar{padding:1.4rem 3rem;display:flex;align-items:center;justify-content:space-between}
.footer-brand{display:flex;align-items:center;gap:.6rem}
.footer-picto{width:28px;height:28px;object-fit:contain;opacity:.55}
.footer-logo{font-family:'Playfair Display',serif;font-weight:700;font-size:.95rem;color:var(--gray-mid)}
.footer-logo em{font-style:italic;color:var(--teal)}
.footer-copy{font-family:'DM Mono',monospace;font-size:.58rem;letter-spacing:.07em;color:rgba(126,202,195,.18)}
.footer-links{display:flex;gap:2rem;list-style:none}
.footer-links a{font-family:'DM Mono',monospace;font-size:.58rem;letter-spacing:.08em;text-transform:uppercase;color:rgba(126,202,195,.28);text-decoration:none;transition:color .2s}
.footer-links a:hover{color:var(--teal)}

/* RETOUR EN HAUT */
#back-top{position:fixed;bottom:2rem;right:2rem;z-index:90;width:56px;height:56px;opacity:0;transform:translateY(14px);transition:opacity .4s ease,transform .4s ease;pointer-events:none}
#back-top.visible{opacity:1;transform:translateY(0);pointer-events:auto}
#bt-ring{position:absolute;inset:0;pointer-events:none}
#bt-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:38px;height:38px;border-radius:50%;background:rgba(30,35,64,.88);border:1px solid rgba(126,202,195,.28);color:var(--teal);cursor:pointer;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(10px);transition:background .25s,border-color .25s,transform .25s}
#bt-btn:hover{background:rgba(126,202,195,.14);border-color:var(--teal);transform:translate(-50%,-50%) scale(1.08)}
#bt-btn svg{display:block}

/* RESPONSIVE */
/* La nav (8 entrées) a besoin d'environ 1230 px pour tenir sur une ligne : hamburger en dessous */
@media(max-width:1240px){
  .nav-links{display:none}
  .hamburger{display:flex}
}
@media(max-width:900px){
  :where(nav[role="navigation"]){padding:0 1.5rem}
  .footer-legal{grid-template-columns:1fr 1fr;gap:2rem;padding:2rem 1.5rem}
  .footer-bar{flex-direction:column;gap:1.2rem;text-align:center;padding:1.2rem 1.5rem}
  .footer-links{justify-content:center}
}
@media(max-width:640px){
  /* lisibilité smartphone du footer */
  .fl-ttl{font-size:.68rem;color:rgba(126,202,195,.55)}
  .fl-item{font-size:.76rem;color:rgba(126,202,195,.65)}
  .fl-item strong{color:rgba(126,202,195,.85)}
  .footer-copy{font-size:.72rem;color:rgba(126,202,195,.55)}
  .footer-links a{font-size:.72rem;color:rgba(126,202,195,.7);display:inline-block;padding:.8rem .4rem}
}
@media(max-width:600px){
  :where(nav[role="navigation"]){padding:0 1.2rem}
  .footer-legal{grid-template-columns:1fr;gap:1.5rem;padding:2rem 1.2rem}
  .footer-bar{padding:1.2rem}
  .footer-links{flex-wrap:wrap;justify-content:center;gap:1rem}
}