/* Feuille de style des pages intérieures de prepasciencespo.com.
   Reprend le design system de la page d'accueil (index.html) ; toute évolution
   de la charte se fait des deux côtés pour garder les pages alignées. */

:root{
  --encre:#101E38;
  --encre-2:#182A4E;
  --encre-3:#223764;
  --papier:#FAF7F1;
  --blanc:#FFFFFF;
  --carmin:#B5233A;
  --carmin-fonce:#8F1B2E;
  --or:#C2973D;
  --or-pale:#F3E8CE;
  --gris:#5B6474;
  --gris-clair:#8A93A5;
  --ligne:#E8E1D3;
  --vert:#2E7D5B;
  --radius:16px;
  --ombre:0 10px 30px rgba(16,30,56,.08);
  --ombre-forte:0 18px 50px rgba(16,30,56,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;color:var(--encre);background:var(--papier);line-height:1.6;font-size:16px}
h1,h2,h3,.serif{font-family:'Fraunces',Georgia,serif;font-weight:600;line-height:1.15}
img{max-width:100%}
a{color:var(--carmin);text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--carmin);margin-bottom:16px}
.kicker::before{content:"";width:26px;height:2px;background:var(--carmin);display:inline-block}
.kicker.on-dark{color:var(--or)}
.kicker.on-dark::before{background:var(--or)}
h2{font-size:clamp(28px,3.6vw,42px);margin-bottom:14px;letter-spacing:-.01em}
.section-intro{font-size:17.5px;color:var(--gris);max-width:680px;margin-bottom:48px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:14px 26px;border-radius:999px;font-weight:600;font-size:15.5px;cursor:pointer;border:1.5px solid transparent;transition:all .2s ease;font-family:'Inter',sans-serif}
.btn-primary{background:var(--carmin);color:#fff}
.btn-primary:hover{background:var(--carmin-fonce);transform:translateY(-1px);box-shadow:0 8px 22px rgba(181,35,58,.32)}
.btn-outline{background:transparent;color:var(--encre);border-color:rgba(16,30,56,.28)}
.btn-outline:hover{border-color:var(--encre);background:rgba(16,30,56,.04)}
.btn-outline.on-dark{color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline.on-dark:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-gold{background:var(--or);color:var(--encre)}
.btn-gold:hover{filter:brightness(1.06);transform:translateY(-1px)}

/* ---------- Topbar ---------- */
.topbar{background:var(--encre);color:#EAE4D6;font-size:13.5px;text-align:center;padding:9px 16px;letter-spacing:.02em}
.topbar strong{color:var(--or)}
.topbar a{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* ---------- Nav ---------- */
header.nav{position:sticky;top:0;z-index:60;background:rgba(250,247,241,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--ligne)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px;color:var(--encre)}
.logo-mark{width:42px;height:42px;flex:none}
.logo-name{font-family:'Fraunces',serif;font-size:20px;font-weight:700;letter-spacing:-.01em;line-height:1.05}
.logo-sub{display:block;font-family:'Inter',sans-serif;font-size:10.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--carmin);margin-top:2px}
nav.menu{display:flex;gap:28px;align-items:center}
nav.menu a{color:var(--encre);font-size:14.5px;font-weight:500;position:relative}
nav.menu a:not(.btn):after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--carmin);transition:width .22s}
nav.menu a:not(.btn):hover:after,nav.menu a.actif:not(.btn):after{width:100%}
.nav .btn{padding:10px 20px;font-size:14px}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2.5px;background:var(--encre);margin:5px 0;border-radius:2px;transition:.25s}
.mobile-menu{display:none;flex-direction:column;gap:4px;padding:12px 24px 20px;background:var(--papier);border-bottom:1px solid var(--ligne)}
.mobile-menu a{padding:11px 4px;font-weight:500;color:var(--encre);border-bottom:1px solid var(--ligne)}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu.open{display:flex}

/* ---------- En-tête de page intérieure ---------- */
.page-hero{position:relative;padding:84px 0 64px;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(720px 420px at 88% -10%,rgba(194,151,61,.16),transparent 60%),
  radial-gradient(600px 420px at -8% 110%,rgba(181,35,58,.07),transparent 60%)}
.page-hero .container{position:relative}
.page-hero h1{font-size:clamp(32px,4.4vw,52px);letter-spacing:-.015em;margin-bottom:18px;max-width:820px}
.page-hero h1 em{font-style:italic;color:var(--carmin)}
.page-lead{font-size:18px;color:var(--gris);max-width:640px;margin-bottom:32px}
.page-ctas{display:flex;gap:14px;flex-wrap:wrap}
.page-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--ligne);margin-top:48px;max-width:860px}
.page-stat{padding:20px 18px 0 0}
.page-stat + .page-stat{padding-left:18px;border-left:1px solid var(--ligne)}
.page-stat b{display:block;font-family:'Fraunces',serif;font-size:26px;font-weight:700;color:var(--encre);letter-spacing:-.01em}
.page-stat span{font-size:12.5px;color:var(--gris);line-height:1.4;display:block;margin-top:3px}

/* ---------- Cartes ---------- */
.cartes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.carte{background:var(--blanc);border:1px solid var(--ligne);border-radius:var(--radius);padding:30px 28px;box-shadow:var(--ombre)}
.carte-num{font-family:'Fraunces',serif;font-size:15px;font-weight:700;color:var(--carmin);letter-spacing:.06em;margin-bottom:14px}
.carte h3{font-size:20px;margin-bottom:10px}
.carte p{font-size:15px;color:var(--gris)}
.carte b{color:var(--encre)}
.carte .badge{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--carmin);background:rgba(181,35,58,.08);border:1px solid rgba(181,35,58,.25);padding:4px 10px;border-radius:999px;text-transform:uppercase;margin-bottom:14px}

/* ---------- Bande sombre ---------- */
.bande-sombre{background:var(--encre);color:#fff}
.bande-sombre h2{color:#fff}
.bande-sombre .section-intro{color:#B8C0D2}
.bande-sombre p{color:#B8C0D2}

/* ---------- Accordéons ---------- */
.accordion{border:1px solid var(--ligne);border-radius:var(--radius);background:var(--blanc);overflow:hidden;box-shadow:var(--ombre)}
.acc-item + .acc-item{border-top:1px solid var(--ligne)}
.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 26px;background:none;border:none;cursor:pointer;text-align:left;font-family:'Inter',sans-serif}
.acc-head:hover{background:rgba(16,30,56,.025)}
.acc-title{display:flex;align-items:center;gap:14px}
.acc-coef{flex:none;font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--carmin);background:rgba(181,35,58,.08);border:1px solid rgba(181,35,58,.25);padding:4px 10px;border-radius:999px;text-transform:uppercase}
.acc-title h4{font-family:'Fraunces',serif;font-size:19px;font-weight:600;color:var(--encre)}
.acc-vol{font-size:13px;color:var(--gris-clair);font-weight:500;flex:none;display:flex;align-items:center;gap:14px}
.acc-chev{flex:none;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--ligne);display:flex;align-items:center;justify-content:center;transition:transform .25s;font-size:12px;color:var(--gris)}
.acc-item.open .acc-chev{transform:rotate(180deg);border-color:var(--carmin);color:var(--carmin)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .35s ease}
.acc-content{padding:0 26px 26px;display:grid;grid-template-columns:1fr 1fr;gap:8px 34px}
.acc-content .full{grid-column:1/-1}
.mod{display:flex;gap:11px;font-size:14.5px;color:var(--gris);padding:7px 0;border-bottom:1px dashed var(--ligne)}
.mod::before{content:"→";color:var(--or);font-weight:700;flex:none}
.mod b{color:var(--encre);font-weight:600}
.prog-note{margin-top:22px;font-size:14px;color:var(--gris);background:var(--or-pale);border:1px solid rgba(194,151,61,.4);border-radius:12px;padding:16px 20px}
.prog-note b{color:var(--encre)}

/* ---------- Timeline ---------- */
.timeline{position:relative;max-width:820px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:19px;top:6px;bottom:6px;width:2px;background:var(--ligne)}
.t-item{position:relative;padding:0 0 34px 64px}
.t-item:last-child{padding-bottom:0}
.t-dot{position:absolute;left:8px;top:2px;width:24px;height:24px;border-radius:50%;background:var(--papier);border:2.5px solid var(--carmin);display:flex;align-items:center;justify-content:center}
.t-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--carmin)}
.t-item.officiel .t-dot{border-color:var(--or)}
.t-item.officiel .t-dot::after{background:var(--or)}
.t-date{font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--carmin);margin-bottom:5px}
.t-item.officiel .t-date{color:var(--or)}
.t-item h4{font-family:'Fraunces',serif;font-size:19px;margin-bottom:5px}
.t-item p{font-size:14.5px;color:var(--gris);max-width:600px}

/* ---------- Tarifs ---------- */
.prix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch;margin-bottom:30px}
.prix-card{background:var(--blanc);border:1.5px solid var(--ligne);border-radius:20px;padding:34px 30px;display:flex;flex-direction:column;position:relative}
.prix-card.star{border-color:var(--carmin);box-shadow:var(--ombre-forte);transform:scale(1.02)}
.prix-pop{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--carmin);color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:6px 16px;border-radius:999px;white-space:nowrap}
.prix-card h3{font-size:21px;margin-bottom:4px}
.prix-desc{font-size:13.5px;color:var(--gris);margin-bottom:20px;min-height:40px}
.prix-montant{font-family:'Fraunces',serif;font-size:42px;font-weight:700;letter-spacing:-.02em;line-height:1;margin-bottom:4px}
.prix-montant small{font-size:16px;font-weight:500;color:var(--gris)}
.prix-sub{font-size:12.5px;color:var(--gris-clair);margin-bottom:24px}
.prix-list{list-style:none;flex:1;margin-bottom:26px}
.prix-list li{padding:8px 0 8px 28px;position:relative;font-size:14px;color:var(--encre-2);border-bottom:1px dashed var(--ligne)}
.prix-list li:last-child{border:none}
.prix-list li::before{content:"✓";position:absolute;left:0;top:7px;color:var(--vert);font-weight:700}
.prix-list li.plus{font-weight:600}
.prix-list li.plus::before{content:"+";color:var(--carmin);font-size:16px;top:6px}
.prix-card .btn{width:100%}
.pack-banner{display:flex;align-items:center;justify-content:space-between;gap:26px;background:linear-gradient(105deg,var(--encre) 0%,var(--encre-3) 100%);color:#fff;border-radius:20px;padding:32px 38px;flex-wrap:wrap;position:relative;overflow:hidden}
.pack-banner::after{content:"";position:absolute;right:-40px;top:-40px;width:190px;height:190px;border-radius:50%;background:radial-gradient(circle,rgba(194,151,61,.3),transparent 70%)}
.pack-banner h3{font-size:24px;margin-bottom:6px}
.pack-banner h3 span{color:var(--or)}
.pack-banner p{color:#C2C9D8;font-size:15px;max-width:560px}
.pack-banner .btn{position:relative;z-index:1}
.tarif-notes{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;margin-top:34px;font-size:13.5px;color:var(--gris)}
.tarif-notes span{display:inline-flex;align-items:center;gap:8px}
.tarif-notes b{color:var(--encre)}

/* ---------- FAQ ---------- */
.faq .accordion{max-width:860px;margin:0 auto}
.faq .acc-head h4{font-size:16.5px;font-family:'Inter',sans-serif;font-weight:600}
.faq .acc-content{display:block;padding:0 26px 24px;font-size:15px;color:var(--gris)}
.faq .acc-content b{color:var(--encre)}

/* ---------- CTA final ---------- */
.cta-final{background:var(--encre);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-final::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 320px at 50% -20%,rgba(194,151,61,.22),transparent 65%)}
.cta-final .container{position:relative;max-width:760px}
.cta-final h2{color:#fff;font-size:clamp(30px,4vw,46px)}
.cta-final p{color:#B8C0D2;font-size:17px;margin-bottom:36px}
.cta-form{display:flex;gap:12px;max-width:520px;margin:0 auto 18px;flex-wrap:wrap;justify-content:center}
.cta-form input{flex:1;min-width:240px;padding:15px 20px;border-radius:999px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.07);color:#fff;font-size:15px;font-family:'Inter',sans-serif;outline:none}
.cta-form input::placeholder{color:#8A93A5}
.cta-form input:focus{border-color:var(--or)}
.cta-form .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.cta-form select{padding:15px 20px;border-radius:999px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.07);color:#fff;font-size:15px;font-family:'Inter',sans-serif;outline:none;min-width:180px}
.cta-form select:focus{border-color:var(--or)}
.cta-form select option{color:var(--encre)}
.formule-choisie{display:none;background:rgba(194,151,61,.16);border:1px solid rgba(194,151,61,.45);color:#E8D5A4;font-size:13.5px;font-weight:600;padding:7px 16px;border-radius:999px;margin-bottom:18px}
.cta-small{font-size:12.5px;color:#8A93A5}
.cta-small a{color:#C9CFDD}

/* ---------- Article (pages ressources) ---------- */
.article{max-width:780px;margin:0 auto;padding:64px 24px 88px}
.article .fil{font-size:13px;color:var(--gris-clair);margin-bottom:26px}
.article .fil a{color:var(--gris)}
.article h1{font-size:clamp(30px,4.2vw,44px);letter-spacing:-.015em;margin-bottom:14px}
.article .chapo{font-size:18px;color:var(--gris);margin-bottom:12px}
.article .maj{font-size:13.5px;color:var(--gris-clair);margin-bottom:42px}
.article h2{font-size:26px;margin:44px 0 14px}
.article h3{font-size:19px;margin:28px 0 10px}
.article p{margin-bottom:15px}
.article ul,.article ol{margin:0 0 15px 22px}
.article li{margin-bottom:7px}
.article table{width:100%;border-collapse:collapse;margin:18px 0 24px;background:var(--blanc);border:1px solid var(--ligne);border-radius:12px;overflow:hidden;font-size:14.5px}
.article th{background:var(--encre);color:#fff;text-align:left;padding:12px 16px;font-weight:600;font-size:13.5px}
.article td{padding:12px 16px;border-top:1px solid var(--ligne);vertical-align:top}
.article .tableau-defilant{overflow-x:auto;margin:18px 0 24px}
.article .tableau-defilant table{margin:0;min-width:560px}
.article .encadre{background:var(--or-pale);border:1px solid rgba(194,151,61,.4);border-radius:12px;padding:18px 22px;font-size:15px;margin:22px 0}
.article .encadre b{color:var(--encre)}
.article .cta-article{background:var(--encre);color:#fff;border-radius:16px;padding:30px 32px;margin:40px 0 0;display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap}
.article .cta-article p{color:#B8C0D2;margin:6px 0 0;font-size:14.5px}
.article .cta-article h3{color:#fff;margin:0}

/* ---------- Cartes ressources ---------- */
.ressources-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.ressource-card{background:var(--blanc);border:1px solid var(--ligne);border-radius:var(--radius);padding:30px 28px;box-shadow:var(--ombre);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.ressource-card:hover{transform:translateY(-3px);box-shadow:var(--ombre-forte)}
.ressource-card h3{font-size:21px;margin-bottom:10px}
.ressource-card h3 a{color:var(--encre)}
.ressource-card p{font-size:14.5px;color:var(--gris);flex:1;margin-bottom:18px}
.ressource-card .suite{font-size:14px;font-weight:600;color:var(--carmin)}

/* ---------- Footer ---------- */
footer{background:#0B1526;color:#9FA9BF;padding:64px 0 34px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
footer h4{color:#fff;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
footer a{color:#9FA9BF;display:block;padding:4px 0}
footer a:hover{color:#fff}
.footer-logo{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-logo .logo-name{color:#fff;font-size:18px}
.footer-brand p{font-size:13.5px;max-width:280px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#6B7488}
.footer-bottom a{display:inline;padding:0}

/* ---------- Apparition au défilement ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- Responsive ---------- */
@media(max-width:1020px){
  .cartes-grid{grid-template-columns:1fr 1fr}
  .prix-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto 30px}
  .prix-card.star{transform:none}
  .page-stats{grid-template-columns:1fr 1fr}
  .page-stat:nth-child(odd){border-left:none;padding-left:0}
}
@media(max-width:860px){
  nav.menu{display:none}
  .burger{display:block}
  section{padding:64px 0}
  .cartes-grid,.ressources-grid{grid-template-columns:1fr}
  .acc-content{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .acc-vol{display:none}
}
@media(max-width:640px){
  .topbar-detail{display:none}
}