/* =========================================================
   BUY THE MOON — BTM Formation
   Design system v2 — refonte épurée (inspiration UX Apple :
   simplicité, respiration, hiérarchie nette, peu de mots)
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;600;700;800&display=swap');

:root{
  /* Couleurs de marque */
  --navy:#00286B;
  --navy-deep:#001B4D;
  --blue:#217DB8;
  --lightblue:#6ECAFF;
  --yellow:#FFCC00;
  --grey:#D8D8D8;
  --slate:#44546A;
  --ink:#12213D;
  --paper:#FFFFFF;
  --paper-soft:#F6F8FB;
  --line:#E4E8F0;

  /* Typo */
  --font-title:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-body:'Calibri','Carlito','Segoe UI',-apple-system,BlinkMacSystemFont,sans-serif;

  /* Structure */
  --container:1240px;
  --prose:62ch;
  --radius:14px;
  --radius-sm:10px;
  --shadow-card:0 12px 32px rgba(0,27,77,.08);
  --grad-brand:linear-gradient(135deg,var(--navy) 0%,var(--blue) 60%,var(--lightblue) 100%);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--font-title);color:var(--navy);margin:0;line-height:1.15;}
p{margin:0;}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 28px;}

.eyebrow{
  display:inline-block;
  font-family:var(--font-title);
  font-weight:700;
  font-size:.78rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--blue);
}
.eyebrow.on-dark{color:var(--lightblue);}

h1{font-size:clamp(2.1rem,4.2vw,3.4rem);font-weight:800;letter-spacing:-.01em;}
h2{font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:700;letter-spacing:-.01em;}
h3{font-size:1.2rem;font-weight:700;}

.section{padding:88px 0;}
.section + .section{border-top:1px solid var(--line);}
.section-head{max-width:640px;margin:0 0 44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head p{margin-top:14px;color:var(--slate);font-size:1.05rem;max-width:var(--prose);}
.section-head.center p{margin-left:auto;margin-right:auto;}

.lede{max-width:var(--prose);color:var(--slate);font-size:1.05rem;}

/* ---------- Boutons (système à 2 niveaux) ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:999px;
  font-family:var(--font-title);
  font-weight:700;
  font-size:.95rem;
  border:2px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, background-color .15s ease, border-color .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--yellow);color:var(--navy-deep);}
.btn-primary:hover{background:#FFD633;}
.btn-secondary{background:transparent;border-color:var(--navy);color:var(--navy);}
.btn-secondary:hover{background:var(--navy);color:#fff;}
.btn-secondary.on-dark{border-color:#fff;color:#fff;}
.btn-secondary.on-dark:hover{background:#fff;color:var(--navy);}
.btn-text{
  padding:0;border-radius:0;background:none;color:var(--blue);
  font-weight:700;gap:6px;
}
.btn-text::after{content:'→';transition:transform .15s ease;}
.btn-text:hover::after{transform:translateX(4px);}
.btn-block{width:100%;}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.cta-note{font-size:.88rem;color:var(--slate);margin-top:12px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0;}
.brand-logo-img{height:38px;width:auto;}
.main-nav ul{display:flex;gap:30px;}
.main-nav a{font-family:var(--font-title);font-weight:600;font-size:.94rem;color:var(--ink);}
.main-nav a:hover{color:var(--blue);}
.header-cta{display:flex;align-items:center;gap:12px;}
.header-cta .btn{padding:11px 20px;font-size:.88rem;}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--navy);margin:5px 0;transition:transform .2s ease,opacity .2s ease;}
.nav-cta{display:none;}

/* ---------- Hero ---------- */
.hero{position:relative;color:#fff;overflow:hidden;min-height:84vh;display:flex;align-items:flex-end;}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center 38%;}
.hero-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,27,77,.35) 0%,rgba(0,27,77,.55) 55%,rgba(0,20,60,.92) 100%);
}
.hero-content{position:relative;z-index:1;padding:64px 0 72px;max-width:760px;}
.hero-content h1{color:#fff;margin:16px 0 20px;}
.hero-content .lede{color:#EAF1FB;font-size:1.12rem;margin-bottom:32px;}
.hero .eyebrow{color:var(--yellow);}

/* ---------- Bandeau preuve ---------- */
.proof-band{padding:52px 0;background:var(--paper-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;text-align:center;}
.proof-item .num{display:block;font-family:var(--font-title);font-weight:800;font-size:clamp(1.7rem,3vw,2.3rem);color:var(--navy);}
.proof-item .label{display:block;margin-top:6px;color:var(--slate);font-size:.95rem;}
.proof-source{margin-top:26px;text-align:center;font-size:.82rem;color:#8592A8;}

/* ---------- Double expérience (grands blocs photo+texte) ---------- */
.duo-block{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.duo-block + .duo-block{margin-top:64px;}
.duo-block.reverse .duo-media{order:2;}
.duo-block.reverse .duo-text{order:1;}
.duo-media img{border-radius:var(--radius);width:100%;height:420px;object-fit:cover;}
.duo-text h3{font-size:1.5rem;margin-bottom:14px;}
.duo-text p{color:var(--slate);max-width:46ch;}

/* ---------- Grille formations (2x2) ---------- */
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.course-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:box-shadow .2s ease,transform .2s ease;}
.course-card:hover{box-shadow:var(--shadow-card);transform:translateY(-2px);}
.course-card-media{height:180px;position:relative;}
.course-card-media img{width:100%;height:100%;object-fit:cover;}
.course-card-body{padding:24px;}
.course-card-body h3{margin-bottom:8px;}
.course-card-body .benefit{color:var(--slate);font-size:.96rem;margin-bottom:14px;}
.course-card-foot{display:flex;align-items:center;justify-content:space-between;}
.course-duration{font-size:.85rem;color:#8592A8;font-weight:600;}
.course-grid-foot{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin-top:36px;}

/* ---------- Catalogue complet (domaines) ---------- */
.domain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 40px;}
.domain-item h3{font-size:1.05rem;margin-bottom:8px;}
.domain-item p{color:var(--slate);font-size:.95rem;}

/* ---------- Expériences signature ---------- */
.xp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;}
.xp-card{border-radius:var(--radius);overflow:hidden;position:relative;color:#fff;min-height:280px;display:flex;align-items:flex-end;cursor:pointer;}
.xp-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;}
.xp-card::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,27,77,0) 30%,rgba(0,20,60,.88) 100%);z-index:1;}
.xp-card-body{position:relative;z-index:2;padding:22px;}
.xp-card .fmt{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--yellow);}
.xp-card h3{color:#fff;margin:6px 0 4px;}
.xp-card .skill{font-size:.9rem;color:#EAF1FB;}
.xp-card.no-media{background:var(--grad-brand);}
.xp-card.no-media::after{content:none;}
.xp-grid-foot{margin-top:30px;text-align:center;}

/* ---------- Références ---------- */
.logo-row{display:flex;flex-wrap:wrap;gap:40px;align-items:center;justify-content:center;padding:8px 0 36px;}
.logo-row span{font-family:var(--font-title);font-weight:700;color:#B7C0D1;font-size:1.05rem;letter-spacing:.02em;}
.result-card{max-width:640px;margin:0 auto;text-align:center;padding:36px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-soft);}
.result-card .num{font-family:var(--font-title);font-weight:800;font-size:2.4rem;color:var(--navy);}
.result-card p{margin-top:10px;color:var(--slate);}
.result-card .src{margin-top:14px;font-size:.82rem;color:#8592A8;}

/* ---------- CTA final ---------- */
.cta-final{position:relative;background:var(--grad-brand);color:#fff;text-align:center;padding:96px 0;}
.cta-final::before{content:'';position:absolute;inset:0;background:rgba(0,18,56,.28);}
.cta-final .container{position:relative;z-index:1;}
.cta-final h2{color:#fff;max-width:720px;margin:0 auto 16px;}
.cta-final .lede{color:#EAF1FB;max-width:560px;margin:0 auto 32px;}
.cta-final .cta-row{justify-content:center;}
.cta-final .cta-note{color:#C9D8EE;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-deep);color:#C9D3E4;padding:56px 0 28px;}
.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-brand .brand-logo-img{height:34px;margin-bottom:14px;}
.footer-brand p{max-width:36ch;font-size:.92rem;color:#9FADC6;}
.footer-links{display:flex;gap:64px;flex-wrap:wrap;}
.footer-col h4{font-family:var(--font-title);color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:.92rem;color:#C9D3E4;}
.footer-col a:hover{color:var(--yellow);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding-top:22px;font-size:.82rem;color:#7C8AA8;}

/* ---------- Accordéons natifs (<details>) ---------- */
.accordion-item{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;}
.accordion-item summary{
  cursor:pointer;list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-family:var(--font-title);font-weight:700;color:var(--navy);
}
.accordion-item summary::-webkit-details-marker{display:none;}
.accordion-item summary .chevron{flex:0 0 auto;transition:transform .2s ease;color:var(--blue);font-size:1.1rem;}
.accordion-item[open] summary .chevron{transform:rotate(180deg);}
.accordion-item .accordion-body{padding:0 22px 22px;color:var(--slate);}
.accordion-item .accordion-body p + p{margin-top:12px;}

/* ---------- Grille informations pratiques (definition list) ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.info-grid dl{margin:0;padding:20px 24px;border-bottom:1px solid var(--line);}
.info-grid dl:nth-last-child(-n+2){border-bottom:0;}
.info-grid dl:nth-child(odd){border-right:1px solid var(--line);}
.info-grid dt{font-family:var(--font-title);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--blue);margin-bottom:6px;}
.info-grid dd{margin:0;color:var(--ink);font-size:.98rem;}

/* ---------- Programme (jours) ---------- */
.programme-day{padding:24px 22px;}
.programme-day ul{display:flex;flex-direction:column;gap:12px;}
.programme-day li{padding-left:20px;position:relative;color:var(--slate);}
.programme-day li::before{content:'';position:absolute;left:0;top:.55em;width:7px;height:7px;border-radius:50%;background:var(--blue);}

/* ---------- Compétences (liste simple) ---------- */
.skill-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.skill-item{display:flex;gap:14px;padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);}
.skill-item .n{font-family:var(--font-title);font-weight:800;color:var(--yellow);-webkit-text-stroke:1px var(--navy);font-size:1.3rem;}
.skill-item p{color:var(--slate);}

/* ---------- Immersion (photo + texte pleine largeur) ---------- */
.immersion{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.immersion-media img{border-radius:var(--radius);width:100%;height:460px;object-fit:cover;}
.immersion-text p{color:var(--slate);margin-bottom:16px;}
.immersion-text ul{display:flex;flex-direction:column;gap:10px;margin-top:18px;}
.immersion-text li{padding-left:20px;position:relative;color:var(--slate);font-size:.96rem;}
.immersion-text li::before{content:'';position:absolute;left:0;top:.55em;width:7px;height:7px;border-radius:50%;background:var(--yellow);}

/* ---------- Sheet hero (fiche formation) ---------- */
.sheet-hero{position:relative;background:var(--grad-brand);color:#fff;padding:64px 0 56px;}
.sheet-hero::before{content:'';position:absolute;inset:0;background:rgba(0,18,56,.28);}
.sheet-hero .container{position:relative;z-index:1;}
.sheet-hero h1{color:#fff;margin:14px 0 16px;}
.sheet-hero .lede{color:#EAF1FB;max-width:640px;margin-bottom:24px;}
.sheet-stats{display:flex;flex-wrap:wrap;gap:40px;margin:4px 0 28px;}
.sheet-stats .stat .num{display:block;font-family:var(--font-title);font-weight:800;font-size:1.9rem;color:#fff;}
.sheet-stats .stat .label{display:block;margin-top:2px;font-size:.85rem;color:#EAF1FB;}
.sheet-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.sheet-meta span{
  font-size:.85rem;font-weight:600;padding:8px 16px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);
}

/* ---------- Utilitaires ---------- */
.text-center{text-align:center;}
.mt-lg{margin-top:48px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:12px 20px;z-index:200;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width:1080px){
  .duo-block,.immersion{grid-template-columns:1fr;}
  .duo-block.reverse .duo-media,.duo-block.reverse .duo-text{order:0;}
  .duo-media img,.immersion-media img{height:320px;}
}

@media (max-width:860px){
  .main-nav{
    display:none;position:fixed;top:70px;left:0;right:0;
    background:#fff;border-top:1px solid var(--line);
    max-height:calc(100vh - 70px);overflow-y:auto;z-index:60;
    box-shadow:0 16px 32px rgba(0,27,77,.12);
  }
  .main-nav.is-open{display:block;}
  .main-nav ul{flex-direction:column;gap:0;padding:8px 0;}
  .main-nav li{border-bottom:1px solid var(--line);}
  .main-nav a{display:block;padding:16px 28px;}
  .header-cta .btn{display:none;}
  .nav-toggle{display:block;}
  .nav-cta{display:flex;flex-direction:column;gap:10px;padding:16px 28px 22px;}

  .section{padding:64px 0;}
  .proof-grid{grid-template-columns:1fr;gap:28px;}
  .course-grid{grid-template-columns:1fr;}
  .domain-grid{grid-template-columns:1fr;gap:28px;}
  .xp-grid{grid-template-columns:1fr;}
  .skill-grid{grid-template-columns:1fr;}
  .info-grid{grid-template-columns:1fr;}
  .info-grid dl:nth-child(odd){border-right:0;}
  .info-grid dl:nth-last-child(-n+2){border-bottom:1px solid var(--line);}
  .info-grid dl:last-child{border-bottom:0;}
  .footer-links{gap:36px;}
  .hero{min-height:auto;}
  .hero-content{padding:56px 0 48px;}
}

@media (max-width:620px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .cta-row .btn{width:100%;}
  .footer-top{flex-direction:column;}
  .duo-media img,.immersion-media img{height:260px;}
}