/* ============================================================
   CHCL · Concours d'admission - feuille de style principale
   Palette joviale : bleu chaud, ambre ensoleillé, corail
   ============================================================ */
:root{
  --bleu:#1d4ed8;
  --bleu-fonce:#1e3a8a;
  --bleu-tres-fonce:#17275e;
  --bleu-clair:#eff4ff;
  --ambre:#f59e0b;
  --ambre-clair:#fef3c7;
  --corail:#f97316;
  --corail-clair:#fff1e7;
  --vert:#16a34a;
  --vert-clair:#e8f7ee;
  --encre:#1e293b;
  --gris:#64748b;
  --gris-clair:#94a3b8;
  --fond:#fdf9f2;
  --blanc:#ffffff;
  --bordure:#e8e2d6;
  --rayon:18px;
  --ombre:0 8px 24px rgba(30,58,138,.10);
  --ombre-douce:0 4px 14px rgba(30,41,59,.07);
  --transition:.25s ease;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--encre);
  background:var(--fond);
  line-height:1.6;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none}
.conteneur{max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- Barre supérieure ---------- */
.barre-top{
  background:var(--bleu-tres-fonce);
  color:#c7d4f5;font-size:.82rem;
}
.barre-top .conteneur{
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap;
}
.barre-top .lieu{display:flex;align-items:center;gap:8px}
.barre-top .liens{display:flex;gap:18px}
.barre-top a{color:#c7d4f5;transition:color var(--transition)}
.barre-top a:hover{color:#fff}
.barre-top svg{flex:none}

/* ---------- En-tête ---------- */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--bordure);
}
.entete{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding-top:14px;padding-bottom:14px;
}
.marque{display:flex;align-items:center;gap:12px}
.logo{
  width:50px;height:50px;flex-shrink:0;
  object-fit:contain;
}
.marque .nom{font-size:1.06rem;font-weight:700;line-height:1.25}
.marque .sous-nom{font-size:.78rem;color:var(--gris)}
nav.menu{display:flex;align-items:center;gap:4px}
nav.menu a{
  padding:9px 14px;border-radius:999px;
  font-size:.92rem;font-weight:600;color:var(--gris);
  transition:all var(--transition);
}
nav.menu a:hover{color:var(--bleu-fonce);background:var(--bleu-clair)}
nav.menu a.actif{background:var(--bleu-fonce);color:#fff}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:999px;
  font-weight:700;font-size:.92rem;
  transition:transform var(--transition),box-shadow var(--transition),background var(--transition);
}
.btn:hover{transform:translateY(-2px)}
.btn-plein{background:var(--corail);color:#fff;box-shadow:0 6px 16px rgba(249,115,22,.35)}
.btn-plein:hover{background:#ea6a0a}
.btn-fantome{border:2px solid var(--bleu-fonce);color:var(--bleu-fonce);background:#fff}
.btn-fantome:hover{background:var(--bleu-clair)}
.btn-sombre{background:var(--bleu-fonce);color:#fff;box-shadow:0 6px 16px rgba(30,58,138,.3)}
.btn-sombre:hover{background:var(--bleu-tres-fonce)}
.burger{
  display:none;flex-direction:column;gap:5px;
  padding:10px;border-radius:10px;border:1.5px solid var(--bordure);background:#fff;
}
.burger span{width:20px;height:2.4px;border-radius:2px;background:var(--encre);transition:all var(--transition)}
.burger.ouvert span:nth-child(1){transform:translateY(7.4px) rotate(45deg)}
.burger.ouvert span:nth-child(2){opacity:0}
.burger.ouvert span:nth-child(3){transform:translateY(-7.4px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(90deg,rgba(0,0,0,.65),rgba(0,0,0,.2)),
    url('../images/campus_chcl_hd.webp') center 60% / cover no-repeat;
  color:#fff;
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.hero::before{
  width:420px;height:420px;right:-120px;top:-140px;
  background:radial-gradient(circle,rgba(245,158,11,.35),transparent 70%);
}
.hero::after{
  width:300px;height:300px;left:-100px;bottom:-120px;
  background:radial-gradient(circle,rgba(249,115,22,.28),transparent 70%);
}
.hero .conteneur{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.15fr .85fr;gap:44px;
  padding-top:64px;padding-bottom:64px;align-items:center;
}
.badge{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  padding:7px 16px;border-radius:999px;
  font-size:.82rem;font-weight:600;letter-spacing:.3px;
}
.badge .point{
  width:8px;height:8px;border-radius:50%;background:#4ade80;
  box-shadow:0 0 0 4px rgba(74,222,128,.25);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(74,222,128,.25)}50%{box-shadow:0 0 0 7px rgba(74,222,128,.12)}}
.hero h1{
  font-size:clamp(1.7rem,3.6vw,2.7rem);
  line-height:1.18;font-weight:800;letter-spacing:-.5px;
  margin:20px 0 14px;
}
.hero h1 .soleil{color:#fcd34d}
.hero .accroche{
  font-size:1.03rem;color:#dbe6ff;max-width:540px;margin-bottom:28px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-actions .btn-fantome{border-color:rgba(255,255,255,.6);color:#fff;background:transparent}
.hero-actions .btn-fantome:hover{background:rgba(255,255,255,.12)}
.badges-infos{display:flex;gap:22px;flex-wrap:wrap;margin-top:32px}
.badges-infos span{display:flex;align-items:center;gap:8px;font-size:.86rem;color:#c9d8fa}

/* Carte compte à rebours */
.carte-compte{
  background:#fff;color:var(--encre);
  border-radius:24px;padding:28px;
  box-shadow:0 24px 60px rgba(10,20,60,.35);
  border-top:6px solid var(--ambre);
}
.carte-compte h3{font-size:1.02rem;font-weight:700}
.carte-compte .sous-titre{font-size:.82rem;color:var(--gris);margin:4px 0 18px}
.grille-temps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.cellule-temps{
  background:var(--bleu-clair);border-radius:14px;
  padding:12px 6px;text-align:center;
}
.cellule-temps .chiffre{
  font-size:1.55rem;font-weight:800;color:var(--bleu-fonce);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.cellule-temps .unite{font-size:.68rem;color:var(--gris);text-transform:uppercase;letter-spacing:.6px;margin-top:3px}
.note-compte{
  display:flex;gap:9px;margin-top:18px;
  font-size:.78rem;color:var(--gris);line-height:1.5;
  background:var(--ambre-clair);border-radius:12px;padding:11px 13px;
}
.note-compte svg{flex:none;margin-top:2px}

/* ---------- Sections ---------- */
section{padding:64px 0}
.tete-section{text-align:center;max-width:640px;margin:0 auto 42px}
.sur-titre{
  display:inline-block;font-size:.78rem;font-weight:700;
  letter-spacing:1.4px;text-transform:uppercase;
  color:var(--corail);background:var(--corail-clair);
  padding:6px 16px;border-radius:999px;margin-bottom:14px;
}
.tete-section h2{font-size:clamp(1.45rem,2.6vw,2rem);font-weight:800;letter-spacing:-.4px;line-height:1.25}
.tete-section p{color:var(--gris);margin-top:12px}

/* Étapes */
#etapes{background:#fff}
.grille-etapes{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.etape{
  background:var(--fond);border:1.5px solid var(--bordure);
  border-radius:var(--rayon);padding:26px 22px;
  position:relative;transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.etape:hover{transform:translateY(-6px);box-shadow:var(--ombre);border-color:transparent}
.etape .numero{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1rem;color:#fff;margin-bottom:18px;
}
.etape:nth-child(1) .numero{background:var(--bleu)}
.etape:nth-child(2) .numero{background:var(--corail)}
.etape:nth-child(3) .numero{background:var(--ambre)}
.etape:nth-child(4) .numero{background:var(--vert)}
.etape h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.etape p{font-size:.87rem;color:var(--gris);line-height:1.55}
.etape .astuce{
  margin-top:14px;padding-top:12px;
  border-top:1.5px dashed var(--bordure);
  font-size:.78rem;color:var(--gris);
}
.etape .astuce strong{color:var(--bleu-fonce)}

/* Pièces */
.grille-pieces{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.piece{
  display:flex;gap:15px;align-items:flex-start;
  background:#fff;border:1.5px solid var(--bordure);
  border-radius:var(--rayon);padding:22px;
  transition:transform var(--transition),box-shadow var(--transition);
}
.piece:hover{transform:translateY(-4px);box-shadow:var(--ombre-douce)}
.piece .icone{
  width:46px;height:46px;flex:none;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
}
.piece:nth-child(3n+1) .icone{background:var(--bleu-clair);color:var(--bleu)}
.piece:nth-child(3n+2) .icone{background:var(--corail-clair);color:var(--corail)}
.piece:nth-child(3n) .icone{background:var(--ambre-clair);color:var(--ambre)}
.piece h3{font-size:.96rem;font-weight:700;margin-bottom:4px}
.piece p{font-size:.84rem;color:var(--gris);line-height:1.5}
.rappel{
  margin-top:26px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  background:var(--vert-clair);border:1.5px solid #bfe8cd;
  border-radius:var(--rayon);padding:18px 22px;font-size:.9rem;
}
.rappel strong{color:#0f7a38}
.rappel svg{flex:none;color:var(--vert)}

/* Calendrier */
#calendrier{background:linear-gradient(160deg,var(--bleu-fonce),var(--bleu));color:#fff}
#calendrier .sur-titre{background:rgba(255,255,255,.14);color:#fcd34d}
#calendrier .tete-section p{color:#c9d8fa}
.fuseau{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px;
}
.moment{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--rayon);padding:24px;text-align:center;
  transition:background var(--transition),transform var(--transition);
}
.moment:hover{background:rgba(255,255,255,.14);transform:translateY(-4px)}
.moment .date{font-size:1.15rem;font-weight:800;color:#fcd34d}
.moment .titre{font-weight:700;margin:8px 0 6px}
.moment .detail{font-size:.84rem;color:#c9d8fa}
.moment .bientot{
  display:inline-block;margin-top:12px;font-size:.72rem;font-weight:700;
  background:var(--ambre);color:var(--bleu-tres-fonce);
  padding:4px 12px;border-radius:999px;letter-spacing:.5px;
}

/* FAQ */
.grille-faq{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start}
.faq details{
  background:#fff;border:1.5px solid var(--bordure);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:box-shadow var(--transition);
}
.faq details[open]{box-shadow:var(--ombre-douce);border-color:#d8c9a8}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  padding:18px 20px;font-weight:700;font-size:.94rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .fleche{
  flex:none;width:26px;height:26px;border-radius:50%;
  background:var(--bleu-clair);color:var(--bleu-fonce);
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--transition);
}
.faq details[open] summary .fleche{transform:rotate(180deg);background:var(--ambre-clair);color:var(--ambre)}
.faq details p{padding:0 20px 18px;font-size:.88rem;color:var(--gris);line-height:1.6}
.carte-aide{
  background:linear-gradient(160deg,var(--corail),#e05a0c);
  border-radius:24px;padding:32px;color:#fff;
  box-shadow:0 18px 44px rgba(249,115,22,.35);
  position:sticky;top:110px;
}
.carte-aide h3{font-size:1.3rem;font-weight:800;margin-bottom:10px;line-height:1.3}
.carte-aide p{font-size:.9rem;color:#ffe8d6;line-height:1.6;margin-bottom:22px}
.carte-aide .btn{background:#fff;color:var(--corail)}
.carte-aide .horaires{
  margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.3);
  font-size:.82rem;color:#ffe8d6;
}
.carte-aide .horaires strong{color:#fff}

/* Pied de page */
footer{background:var(--bleu-tres-fonce);color:#b8c6ea;font-size:.86rem}
.pied{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;
  padding-top:52px;padding-bottom:40px;
}
.pied h4{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:14px}
.pied a{display:block;padding:4px 0;transition:color var(--transition)}
.pied a:hover{color:#fcd34d}
.pied .desc{line-height:1.65;max-width:300px}
.pied .logo-footer{
  width:136px;height:auto;margin-bottom:14px;
}
.pied-bas{
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:20px;padding-bottom:20px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:.78rem;color:#8fa3d4;
}
.retour-top{
  position:fixed;right:22px;bottom:22px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  background:var(--corail);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px rgba(249,115,22,.4);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:all var(--transition);
}
.retour-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.retour-top:hover{background:#ea6a0a}

/* ---------- Responsive ---------- */
@media (max-width:1020px){
  .grille-etapes{grid-template-columns:repeat(2,1fr)}
  .grille-pieces{grid-template-columns:repeat(2,1fr)}
  .hero .conteneur{grid-template-columns:1fr;gap:36px;padding-top:48px;padding-bottom:48px}
  .pied{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  nav.menu{
    position:fixed;inset:0;top:0;z-index:99;
    background:#fff;flex-direction:column;justify-content:center;gap:10px;
    transform:translateX(100%);transition:transform .35s ease;
    box-shadow:-20px 0 60px rgba(0,0,0,.15);
  }
  nav.menu.ouvert{transform:translateX(0)}
  nav.menu a{font-size:1.15rem;padding:12px 26px}
  .burger{display:flex;z-index:100}
  header .btn-candidat{display:none}
  .grille-faq{grid-template-columns:1fr}
  .carte-aide{position:static}
  .fuseau{grid-template-columns:1fr}
}
@media (max-width:620px){
  section{padding:48px 0}
  .grille-etapes,.grille-pieces{grid-template-columns:1fr}
  .pied{grid-template-columns:1fr;gap:26px}
  .barre-top .liens{display:none}
  .badges-infos{gap:12px}
  .hero-actions .btn{width:100%;justify-content:center}
}

/* Raccordement à l'application : accessibilité, connexion et messages. */
[hidden]{display:none!important}
section[id],#etape{scroll-margin-top:100px}
#etape{display:block;height:0}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--ambre);outline-offset:4px}
.lien-evitement{position:fixed;top:-100px;left:16px;z-index:200;background:#fff;color:var(--bleu-fonce);padding:12px 18px;border-radius:12px}
.lien-evitement:focus{top:12px}
nav.menu .menu-candidat,nav.menu .menu-connexion{display:none}
.admission-menu-open header{backdrop-filter:none}
.message-site{margin:18px 0;padding:14px 18px;border-radius:14px}
.message-site--succes{background:var(--vert-clair);color:#0f7a38}
.message-site--erreur{background:#fff1f2;color:#9f1239}
.connexion-dialog{position:fixed;inset:0;margin:auto;width:min(480px,calc(100% - 32px));max-height:calc(100dvh - 32px);padding:28px;border:0;border-top:6px solid var(--ambre);border-radius:24px;background:#fff;color:var(--encre);box-shadow:var(--ombre);overflow-y:auto}
.connexion-dialog::backdrop{background:rgba(23,39,94,.6)}
.connexion-dialog .fermer{position:absolute;right:16px;top:12px;padding:4px 10px;font-size:1.5rem;color:var(--gris)}
.connexion-dialog h2{font-size:1.3rem;color:var(--bleu-fonce);padding-right:26px}
.connexion-dialog .introduction{color:var(--gris);font-size:.88rem;margin:8px 0 22px}
.connexion-dialog label{display:block;font-size:.9rem;font-weight:700;margin:16px 0 6px}
.connexion-dialog input{width:100%;font:inherit;padding:12px;border:1px solid var(--bordure);border-radius:12px}
.connexion-dialog .actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.connexion-dialog .erreurs{padding:12px 16px;background:#fff1f2;color:#9f1239;border-radius:12px;font-size:.88rem}
@media(max-width:860px){
  nav.menu{visibility:hidden}
  nav.menu.ouvert{visibility:visible}
  nav.menu .menu-candidat,nav.menu .menu-connexion{display:inline-flex}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}