:root{
  --blue:#1038f2;
  --navy:#0a1b5b;
  --yellow:#ffc43d;
  --yellow-soft:#fff0b5;
  --cream:#fff9eb;
  --paper:#fffdf8;
  --ink:#0d1b55;
  --muted:#626b89;
  --white:#fff;
  --shadow:0 18px 46px rgba(26,38,89,.12);
  --radius:28px;
  --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Manrope",system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.55}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.container{width:min(calc(100% - 40px),var(--container));margin:auto}

/* header */
.site-header{position:fixed;inset:0 0 auto 0;z-index:50;background:rgba(255,253,248,.9);backdrop-filter:blur(15px);transition:.25s;border-bottom:1px solid transparent}
.site-header.scrolled{border-bottom-color:rgba(16,56,242,.1);box-shadow:0 8px 24px rgba(12,28,92,.06)}
.nav{min-height:86px;display:flex;align-items:center;gap:30px}
.brand img{width:70px;height:70px;object-fit:contain}
.nav-links{display:flex;gap:26px;margin-left:18px;font-size:.92rem;font-weight:800}
.nav-links a{padding:12px 0;position:relative}
.nav-links a:after{content:"";position:absolute;left:0;right:0;bottom:5px;height:3px;background:var(--yellow);border-radius:10px;transform:scaleX(0);transition:.2s}
.nav-links a:hover:after,.nav-links a.active:after{transform:scaleX(1)}
.nav-cta{margin-left:auto}
.menu-toggle{display:none;margin-left:auto;width:44px;height:44px;background:none;border:0;cursor:pointer}
.menu-toggle span{display:block;height:3px;margin:5px 0;background:var(--blue);border-radius:10px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:50px;padding:0 23px;border-radius:999px;font-weight:800;transition:.2s}
.btn:hover{transform:translateY(-2px)}
.btn-blue{background:var(--blue);color:white;box-shadow:0 12px 28px rgba(16,56,242,.22)}
.btn-outline{color:var(--blue);border:2px solid var(--blue);background:rgba(255,255,255,.65)}

/* hero */
.hero{position:relative;overflow:hidden;padding:155px 0 90px;background:
radial-gradient(circle at 88% 15%,rgba(255,196,61,.28),transparent 30%),
linear-gradient(180deg,#fffef9,#fff9eb)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center;min-height:585px}
.kicker,.section-label{display:flex;align-items:center;gap:10px;color:var(--blue);font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:.78rem}
.kicker span,.section-label span{width:28px;height:4px;border-radius:99px;background:var(--yellow)}
.hero h1{margin:16px 0 22px;font-size:clamp(3.4rem,6.5vw,6.9rem);line-height:.94;letter-spacing:-.065em;max-width:850px}
.hero h1 em{font-style:normal;color:var(--blue)}
.lead{font-size:1.13rem;color:var(--muted);max-width:690px;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-meta{display:flex;gap:34px;margin-top:44px;padding-top:26px;border-top:1px solid rgba(16,56,242,.12)}
.hero-meta div{display:flex;flex-direction:column}
.hero-meta strong{font-size:1.2rem}
.hero-meta span{color:var(--muted);font-size:.78rem}
.hero-visual{position:relative;min-height:520px;display:grid;place-items:center}
.edition-badge{width:min(390px,80vw);aspect-ratio:1;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(145deg,#ffd96c,var(--yellow));box-shadow:0 30px 60px rgba(207,153,28,.24);transform:rotate(-3deg)}
.edition-badge small{font-size:.85rem;letter-spacing:.28em;font-weight:800;color:var(--navy)}
.edition-badge strong{font-size:9rem;line-height:.88;letter-spacing:-.09em;color:var(--blue)}
.edition-badge span{font-size:1.25rem;font-weight:800;color:var(--navy)}
.floating-card{position:absolute;background:white;border-radius:20px;box-shadow:var(--shadow);padding:18px 20px;max-width:220px;font-size:.82rem;font-weight:700}
.floating-card p{margin:0}
.card-one{right:-10px;top:48px;transform:rotate(4deg)}
.card-two{left:5px;bottom:44px;transform:rotate(-4deg);display:flex;gap:10px;align-items:center}
.mini-dot{display:block;width:10px;height:10px;border-radius:50%;background:var(--blue);margin-bottom:8px}
.mini-dot-inline{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--blue);margin-right:8px}
.shape{position:absolute;border-radius:50%;background:var(--yellow);opacity:.13}
.shape-a{width:380px;height:380px;right:-180px;top:180px}.shape-b{width:270px;height:270px;left:-120px;bottom:-60px}

/* concept */
.concept{padding:105px 0;background:white}
.concept-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:80px}
.concept-sticky{position:sticky;top:125px;align-self:start}
.concept h2,.topics h2,.previous h2,.community h2{margin:13px 0 18px;font-size:clamp(2.2rem,4.2vw,4rem);line-height:1.03;letter-spacing:-.05em}
.concept h2 span{color:var(--blue)}
.concept-sticky p{color:var(--muted);font-size:1.05rem;max-width:480px}
.concept-intro{font-size:1.07rem;color:var(--muted)}
.concept-intro strong{color:var(--ink)}
.principles{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}
.principle-card{background:var(--cream);border:1px solid rgba(16,56,242,.08);border-radius:22px;padding:24px;min-height:210px}
.principle-num{font-size:.78rem;font-weight:800;color:var(--blue);letter-spacing:.12em}
.principle-card h3{font-size:1.22rem;margin:14px 0 8px}
.principle-card p{margin:0;color:var(--muted);font-size:.92rem}

/* topics */
.topics{padding:84px 0;background:var(--cream)}
.topics-head{display:flex;justify-content:space-between;align-items:end;gap:40px}
.topics-head>div{max-width:800px}.topics-head>p{max-width:360px;color:var(--muted)}
.topic-cloud{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.topic-cloud span{padding:12px 17px;border-radius:999px;background:white;border:1px solid rgba(16,56,242,.1);font-weight:800;color:var(--blue);box-shadow:0 8px 20px rgba(38,48,89,.06)}
.topic-cloud span:nth-child(3n+2){background:var(--yellow-soft);color:#765400}
.topic-cloud span:nth-child(4n){background:var(--blue);color:white}

/* previous */
.previous{padding:95px 0 75px;background:var(--paper)}
.section-top{max-width:820px;margin-bottom:36px}
.section-top p{color:var(--muted);font-size:1.02rem}
.events-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.event-card{overflow:hidden;background:white;border-radius:22px;box-shadow:var(--shadow);border:1px solid rgba(15,28,87,.07);transition:.25s}
.event-card:hover{transform:translateY(-6px)}
.event-cover{height:205px;position:relative;overflow:hidden}
.event-cover img{width:100%;height:100%;object-fit:cover;transition:.35s}
.event-card:hover img{transform:scale(1.04)}
.event-number{position:absolute;left:14px;top:14px;background:var(--yellow);color:var(--navy);font-weight:900;border-radius:13px;padding:8px 11px;box-shadow:0 8px 20px rgba(0,0,0,.1)}
.event-body{padding:21px}
.event-body h3{font-size:1.18rem;line-height:1.2;margin:0 0 10px}
.event-body p{font-size:.88rem;color:var(--muted);margin:0 0 17px}
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tags span{font-size:.7rem;font-weight:800;background:#e9eeff;color:var(--blue);padding:6px 9px;border-radius:999px}
.tags span:nth-child(even){background:var(--yellow-soft);color:#6f5205}

/* community */
.community{padding:35px 0 90px;background:var(--paper)}
.community-card{position:relative;overflow:hidden;display:grid;grid-template-columns:1fr auto;align-items:center;gap:46px;background:linear-gradient(135deg,#ffd765,var(--yellow));border-radius:28px;padding:48px;box-shadow:0 20px 48px rgba(201,149,30,.18)}
.community-card:after{content:"42";position:absolute;right:-15px;bottom:-80px;font-size:15rem;font-weight:900;color:rgba(255,255,255,.22);line-height:1}
.community-card>div{position:relative;z-index:2}
.community-eyebrow{font-size:.8rem;font-weight:900;color:var(--blue);text-transform:uppercase;letter-spacing:.12em}
.community h2{font-size:clamp(2rem,3.6vw,3.4rem);margin:8px 0 12px}
.community p{margin:0;color:#56607d;max-width:730px}
.community-actions{display:flex;flex-direction:column;align-items:flex-start;gap:11px}
.community-actions small{max-width:300px;color:#625b47}

/* footer */
footer{background:var(--navy);color:white;padding:32px 0}
.footer{display:flex;align-items:center;gap:24px}
.footer img{width:58px;height:58px;object-fit:contain}
.footer p{margin:0}.footer>span{margin-left:auto;opacity:.75}

/* reveal */
.reveal{opacity:0;transform:translateY(20px)}
.reveal.visible{opacity:1;transform:none;transition:.55s ease}

/* responsive */
@media(max-width:1050px){
  .events-grid{grid-template-columns:repeat(2,1fr)}
  .concept-grid{gap:45px}
  .nav-links{gap:16px}
}
@media(max-width:860px){
  .menu-toggle{display:block}
  .nav-cta{display:none}
  .nav-links{display:none;position:absolute;top:86px;left:20px;right:20px;margin:0;background:white;border-radius:18px;box-shadow:var(--shadow);padding:16px;flex-direction:column;gap:4px}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 8px}
  .hero-grid{grid-template-columns:1fr}
  .hero-copy{text-align:center}.kicker,.hero-actions,.hero-meta{justify-content:center}
  .hero-visual{min-height:470px}
  .concept-grid{grid-template-columns:1fr}
  .concept-sticky{position:static}
  .topics-head{flex-direction:column;align-items:flex-start}
  .community-card{grid-template-columns:1fr;text-align:center}
  .community-actions{align-items:center}
}
@media(max-width:620px){
  .container{width:min(calc(100% - 28px),var(--container))}
  .nav{min-height:76px}.brand img{width:60px;height:60px}.nav-links{top:76px;left:14px;right:14px}
  .hero{padding:120px 0 70px}.hero h1{font-size:clamp(3.1rem,14vw,4.8rem)}
  .hero-actions{flex-direction:column}.hero-actions .btn{width:100%}
  .hero-meta{gap:18px;flex-wrap:wrap}
  .hero-visual{min-height:385px}.edition-badge{width:290px}.edition-badge strong{font-size:7rem}
  .card-one{right:0;top:20px}.card-two{left:0;bottom:10px}
  .principles{grid-template-columns:1fr}
  .events-grid{grid-template-columns:1fr}.event-cover{height:230px}
  .community-card{padding:34px 24px}
  .footer{flex-direction:column;text-align:center}.footer>span{margin-left:0}
}

/* Détail interactif des éditions précédentes */
.event-card{display:flex;flex-direction:column}
.event-body{flex:1}
.event-card[data-event]{cursor:pointer}
.event-open{
  margin:0 20px 20px;min-height:44px;border:0;border-radius:999px;
  background:#f0f3ff;color:var(--blue);font:inherit;font-size:.8rem;font-weight:800;
  cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:.2s ease
}
.event-open:hover{background:var(--blue);color:#fff;transform:translateY(-1px)}

.event-dialog{
  width:min(1120px,calc(100% - 28px));max-height:min(92vh,980px);padding:0;border:0;
  border-radius:28px;color:var(--ink);background:#fffdf8;
  box-shadow:0 34px 90px rgba(6,20,76,.28)
}
.event-dialog::backdrop{background:rgba(6,17,62,.7);backdrop-filter:blur(7px)}
.event-dialog[open]{animation:dialogIn .25s ease-out}
@keyframes dialogIn{from{opacity:0;transform:translateY(18px) scale(.985)}to{opacity:1;transform:none}}
.dialog-shell{position:relative;overflow:hidden}
.dialog-close{
  position:sticky;float:right;top:16px;right:16px;z-index:4;width:46px;height:46px;
  margin:16px 16px -62px 0;border:0;border-radius:50%;background:rgba(255,255,255,.94);
  color:var(--navy);font-size:1.8rem;line-height:1;box-shadow:0 10px 28px rgba(0,0,0,.12);cursor:pointer
}
.dialog-hero{min-height:360px;display:grid;grid-template-columns:1.04fr .96fr;background:linear-gradient(135deg,#fff4c7,#fffdf7)}
.dialog-hero-copy{padding:64px 54px 48px;display:flex;flex-direction:column;justify-content:center}
.dialog-kicker{color:var(--blue);font-size:.8rem;font-weight:900;letter-spacing:.14em;text-transform:uppercase}
.dialog-hero h2{margin:10px 0 16px;font-size:clamp(2.2rem,4.8vw,4.6rem);line-height:.98;letter-spacing:-.055em}
.dialog-hero p{margin:0;color:var(--muted);font-size:1.05rem}
.dialog-hero>img{width:100%;height:100%;min-height:360px;object-fit:cover}
.dialog-content{padding:50px 54px 58px}
.dialog-content section+section{margin-top:54px}
.dialog-section-title{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.dialog-section-title span{width:28px;height:4px;border-radius:999px;background:var(--yellow)}
.dialog-section-title h3{margin:0;font-size:1.45rem}
.dialog-story>p{margin:0;max-width:850px;color:var(--muted);font-size:1.02rem}

.gallery-grid{display:grid;grid-template-columns:1.25fr .75fr .75fr;grid-template-rows:180px 180px;gap:12px}
.gallery-item{overflow:hidden;border-radius:18px;background:#eef1ff;margin:0}
.gallery-item:first-child{grid-row:1/3}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.gallery-item:hover img{transform:scale(1.035)}

.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.testimonial{background:var(--cream);border:1px solid rgba(16,56,242,.08);border-radius:20px;padding:20px}
.testimonial-head{display:flex;align-items:center;gap:12px}
.testimonial-head img{width:48px;height:48px;border-radius:50%;object-fit:cover}
.testimonial-head strong{display:block;font-size:.92rem}
.testimonial-head span{display:block;color:var(--muted);font-size:.74rem}
.testimonial-bubble{
  margin:16px 0 0;padding:16px 17px;border-radius:16px 16px 16px 5px;background:#fff;
  color:var(--muted);font-size:.88rem;box-shadow:0 8px 20px rgba(32,46,100,.06)
}

.video-card{display:grid;grid-template-columns:.72fr 1.28fr;overflow:hidden;border-radius:22px;background:var(--navy);color:#fff}
.video-copy{padding:30px;display:flex;flex-direction:column;justify-content:center}
.video-copy h4{margin:12px 0 8px;font-size:1.5rem}
.video-copy p{margin:0;color:rgba(255,255,255,.7)}
.video-pill{
  align-self:flex-start;padding:7px 10px;border-radius:999px;background:var(--yellow);color:var(--navy);
  font-size:.7rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em
}
.video-card video{width:100%;height:100%;min-height:290px;object-fit:cover;background:#000}

@media(max-width:800px){
  .event-dialog{max-height:94vh}
  .dialog-hero{grid-template-columns:1fr}
  .dialog-hero-copy{padding:54px 26px 30px}
  .dialog-hero>img{min-height:240px;max-height:300px}
  .dialog-content{padding:36px 26px 44px}
  .gallery-grid{grid-template-columns:1fr 1fr;grid-template-rows:220px 150px}
  .gallery-item:first-child{grid-column:1/3;grid-row:auto}
  .testimonial-grid{grid-template-columns:1fr}
  .video-card{grid-template-columns:1fr}
}
@media(max-width:520px){
  .event-dialog{width:calc(100% - 14px);border-radius:20px}
  .dialog-close{top:10px;right:10px;margin:10px 10px -56px 0}
  .gallery-grid{grid-template-columns:1fr;grid-template-rows:repeat(4,180px)}
  .gallery-item:first-child{grid-column:auto}
}