:root{
  --navy:#06121c; --navy-2:#0a1f2e; --navy-3:#0f2c40;
  --gold:#d8b46a; --gold-soft:#e7cf9e;
  --cyan:#39c4de; --cyan-soft:#7fdcee;
  --paper:#faf7f2; --ink:#13222c; --muted:#5c6b74; --line:#e5ded2;
  --radius:5px;
  --font-display:'Sora',system-ui,sans-serif;
  --font-editorial:'Fraunces',Georgia,serif;
  --font-text:'Source Sans 3',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-text);color:var(--ink);background:var(--paper);font-size:19px;line-height:1.72;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
h2.sec{font-family:var(--font-display);font-weight:700;font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em;color:var(--navy)}
.kicker{font-family:var(--font-display);font-size:13.5px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;color:#86682c;margin-bottom:14px}
section{padding:90px 0}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- nav ---------- */
nav.top{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;align-items:center;gap:34px;
  padding:0 34px;height:74px;transition:background .35s ease,box-shadow .35s ease}
nav.top.scrolled{background:rgba(6,18,28,.92);backdrop-filter:blur(10px);box-shadow:0 1px 0 rgba(216,180,106,.25)}
.brand{font-family:var(--font-display);font-weight:800;font-size:22px;color:#fff;letter-spacing:.02em}
.brand span{color:var(--gold)}
.navlinks{display:flex;gap:26px;margin-left:auto}
.navlinks a{font-family:var(--font-display);font-size:15.5px;font-weight:600;letter-spacing:.05em;color:#eaf3f7;position:relative;padding:6px 0}
.navlinks a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--gold);transition:width .3s ease}
.navlinks a:hover::after{width:100%}
.nav-cta{background:var(--gold);color:var(--navy);font-family:var(--font-display);font-weight:700;font-size:13.5px;
  letter-spacing:.05em;padding:11px 24px;border-radius:var(--radius);transition:background .25s ease}
.nav-cta:hover{background:var(--gold-soft)}
.nav-portal{font-size:13.5px;font-weight:600;color:#cfe0e8;border:1.5px solid rgba(207,224,232,.55);padding:9px 16px;border-radius:var(--radius);transition:border-color .25s,color .25s}
.nav-portal:hover{border-color:var(--cyan);color:var(--cyan-soft)}
.burger{display:none}
@media (max-width:1080px){
  .navlinks,.nav-portal{display:none}
  .burger{display:block;margin-left:auto;color:#fff;background:none;border:1px solid rgba(255,255,255,.35);border-radius:var(--radius);padding:8px 12px;font-size:18px;cursor:pointer}
  nav.top.open .navlinks{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;background:rgba(6,18,28,.97);padding:26px 34px;gap:18px}
}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;align-items:center;
  text-align:center;background:radial-gradient(1400px 700px at 70% -8%, #123a52 0%, transparent 55%),
  linear-gradient(165deg,#081a28 0%,var(--navy) 55%,#04101a 100%);overflow:hidden;color:#fff;padding:120px 24px 80px}
#field{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.hero-inner{position:relative;z-index:2;max-width:980px}
.hero .edition{font-family:var(--font-display);font-size:13px;font-weight:600;letter-spacing:.34em;text-transform:uppercase;color:var(--gold-soft);margin-bottom:26px}
.hero h1{font-family:var(--font-display);font-weight:800;font-size:clamp(58px,10vw,124px);line-height:.95;letter-spacing:-.03em}
.hero h1 .y{color:var(--gold)}
.hero .sub{font-family:var(--font-editorial);font-weight:300;font-size:clamp(18px,2.3vw,26px);color:#cfe2ea;margin:26px auto 8px;max-width:760px;line-height:1.45}
.hero .where{font-family:var(--font-display);font-size:clamp(15px,1.8vw,19px);font-weight:600;letter-spacing:.12em;color:#fff;margin-top:18px}
.hero .where em{font-style:normal;color:var(--cyan-soft)}
.hero .count{display:inline-block;margin-top:16px;padding:9px 22px;border:1.5px solid rgba(216,180,106,.55);
  border-radius:999px;font-family:var(--font-display);font-size:14px;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gold-soft);background:rgba(216,180,106,.08)}
.hero .count:empty{display:none}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:44px}
.btn{font-family:var(--font-display);font-weight:700;font-size:14.5px;letter-spacing:.05em;padding:15px 32px;border-radius:var(--radius);transition:transform .25s ease,background .25s ease,border-color .25s ease;display:inline-block}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{background:var(--gold-soft)}
.btn-line{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-line:hover{border-color:var(--cyan);color:var(--cyan-soft)}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:#6d8593;font-size:22px;animation:hint 2.6s ease infinite}
@keyframes hint{0%,100%{transform:translate(-50%,0);opacity:.5}50%{transform:translate(-50%,8px);opacity:1}}

/* ---------- credibility strip ---------- */
.cred{background:var(--navy-2);color:#fff;padding:34px 0;border-top:1px solid rgba(216,180,106,.28);border-bottom:1px solid rgba(216,180,106,.28)}
.cred .wrap{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap}
.cred .item{text-align:center;flex:1;min-width:150px}
.cred .n{font-family:var(--font-display);font-weight:800;font-size:clamp(26px,3vw,38px);color:var(--gold)}
.cred .l{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:#a9bcc7;margin-top:4px}

/* ---------- speakers ---------- */
#speakers{background:var(--paper)}
.spk-head{display:flex;align-items:end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:40px}
.spk-note{font-family:var(--font-editorial);font-style:italic;color:var(--muted);font-size:17px;max-width:460px}
.spk-nav{display:flex;gap:10px;justify-content:flex-end;margin-bottom:16px}
.spk-arrow{width:46px;height:46px;border-radius:50%;border:1.5px solid #c9bda5;background:#fff;color:var(--navy);
  font-size:19px;cursor:pointer;transition:background .2s,border-color .2s,transform .2s}
.spk-arrow:hover{background:var(--navy);color:#fff;border-color:var(--navy);transform:translateY(-2px)}
.spk-row{display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 52px)/3);gap:26px;overflow-x:auto;
  padding:6px 4px 22px;scroll-snap-type:x mandatory;scrollbar-width:none}
.spk-row::-webkit-scrollbar{display:none}
@media (max-width:1000px){.spk-row{grid-auto-columns:min(340px,84vw)}}
.spk{scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .35s ease,box-shadow .35s ease}
.spk:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(6,18,28,.12)}
.spk .ph{aspect-ratio:16/10;background:linear-gradient(140deg,var(--navy-2),var(--navy-3));position:relative;overflow:hidden}
.spk .ph iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.spk .body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:6px;flex:1}
.spk .name{font-family:var(--font-editorial);font-weight:500;font-size:23px;color:var(--navy)}
.spk .aff{font-size:14px;color:var(--muted);letter-spacing:.02em}
.spk .lecture{font-family:var(--font-display);font-size:14.5px;font-weight:600;color:var(--ink);margin-top:8px;line-height:1.4;flex:1}
.spk .link{margin-top:14px;font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.08em;color:#9a8354}
.spk .link:hover{color:var(--navy)}

/* ---------- frontiers ---------- */
#frontiers{background:linear-gradient(180deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff}
#frontiers h2.sec{color:#fff}
#frontiers .kicker{color:var(--gold)}
.fr-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px;margin-top:46px}
.fr{position:relative;border-radius:var(--radius);overflow:hidden;min-height:220px;display:flex;align-items:flex-end;
  padding:26px;border:1px solid rgba(216,180,106,.2);transition:transform .35s ease,border-color .35s ease}
.fr:hover{transform:translateY(-5px);border-color:rgba(216,180,106,.6)}
.fr .bg{position:absolute;inset:0;opacity:.9;transition:transform 1.2s ease}
.fr:hover .bg{transform:scale(1.06)}
.fr .t{position:relative;z-index:2;font-family:var(--font-display);font-weight:700;font-size:19px;line-height:1.3;text-shadow:0 2px 14px rgba(0,0,0,.5)}
.fr .t small{display:block;font-weight:400;font-size:13px;color:#cfe2ea;margin-top:5px;letter-spacing:.04em}
/* 1 · metasurfaces: periodic resonator array under an oblique field glow */
.bg-1{background:
  radial-gradient(circle at 20% 15%,rgba(57,196,222,.4),transparent 45%),
  repeating-radial-gradient(circle at 24% 30%, transparent 0 9px, rgba(127,220,238,.28) 9px 10.5px, transparent 10.5px 30px),
  repeating-radial-gradient(circle at 62% 66%, transparent 0 9px, rgba(127,220,238,.22) 9px 10.5px, transparent 10.5px 30px),
  #0d2a3d}
/* 2 · photonic crystals: dot lattice with a forbidden band */
.bg-2{background:
  linear-gradient(180deg, transparent 42%, rgba(216,180,106,.32) 49%, rgba(216,180,106,.32) 55%, transparent 62%),
  radial-gradient(rgba(127,220,238,.5) 1.6px, transparent 1.8px),
  #0d2a3d;
  background-size:auto, 24px 24px, auto}
/* 3 · plasmonics: nanoantenna gap — twin hotspots, sharp falloff */
.bg-3{background:
  radial-gradient(circle at 44% 48%, rgba(232,207,158,.95) 0 2%, rgba(216,180,106,.5) 5%, transparent 22%),
  radial-gradient(circle at 56% 52%, rgba(232,207,158,.95) 0 2%, rgba(216,180,106,.5) 5%, transparent 22%),
  radial-gradient(circle at 50% 50%, rgba(57,196,222,.25), transparent 55%),
  #0d2a3d}
/* 4 · quantum photonics: discrete states — level lines and occupied dots */
.bg-4{background:
  radial-gradient(circle at 26% 26%, rgba(127,220,238,.9) 0 3px, transparent 5px),
  radial-gradient(circle at 58% 44%, rgba(127,220,238,.7) 0 3px, transparent 5px),
  radial-gradient(circle at 40% 62%, rgba(232,207,158,.8) 0 3px, transparent 5px),
  repeating-linear-gradient(180deg, transparent 0 34px, rgba(127,220,238,.22) 34px 35px),
  #0d2a3d}
/* 5 · light–matter: two crossed wavefronts, interference moiré */
.bg-5{background:
  repeating-linear-gradient(78deg, transparent 0 12px, rgba(57,196,222,.16) 12px 14px),
  repeating-linear-gradient(102deg, transparent 0 12px, rgba(216,180,106,.16) 12px 14px),
  radial-gradient(circle at 50% 45%, rgba(127,220,238,.22), transparent 60%),
  #0d2a3d}
/* 6 · multiphysics: layered anisotropic strata meeting a field */
.bg-6{background:
  repeating-linear-gradient(-24deg, transparent 0 16px, rgba(127,220,238,.14) 16px 18px),
  repeating-linear-gradient(56deg, transparent 0 22px, rgba(216,180,106,.14) 22px 24px),
  radial-gradient(circle at 82% 78%, rgba(57,196,222,.4), transparent 50%),
  #0d2a3d}

/* ---------- key dates : timeline horizontale ---------- */
.tl{display:flex;gap:0;margin-top:58px;position:relative;flex-wrap:wrap}
.tl::before{content:"";position:absolute;top:11px;left:9%;right:9%;height:2px;
  background:linear-gradient(90deg,#d9cfbc,var(--gold),#d9cfbc)}
.tl .step{flex:1;min-width:150px;position:relative;padding:40px 12px 0;text-align:center}
.tl .dot{position:absolute;top:2px;left:50%;transform:translateX(-50%);width:20px;height:20px;
  border-radius:50%;background:var(--paper);border:3px solid var(--gold)}
.tl .step.next .dot{background:var(--gold);box-shadow:0 0 0 7px rgba(216,180,106,.22)}
.tl .st{font-family:var(--font-display);font-weight:700;font-size:15.5px;color:var(--navy);line-height:1.3}
.tl .sd{font-size:14.5px;color:var(--muted);margin-top:5px;letter-spacing:.02em}
.tl .step.next .sd{color:#86682c;font-weight:700}
@media (max-width:820px){
  .tl{flex-direction:column;gap:26px;padding-left:14px}
  .tl::before{left:22px;right:auto;top:8px;bottom:8px;width:2px;height:auto;
    background:linear-gradient(180deg,#d9cfbc,var(--gold),#d9cfbc)}
  .tl .step{padding:0 0 0 44px;text-align:left;min-width:0}
  .tl .dot{left:13px;top:2px;transform:none}
}

/* ---------- key dates (editorial until the full timeline is fixed) ---------- */
#dates{background:var(--paper)}
.dates-lead{font-family:var(--font-editorial);font-size:clamp(22px,2.8vw,30px);font-weight:300;color:var(--navy);margin-top:30px}
.dates-lead strong{font-weight:500;color:#86682c}
.dates-sub{color:var(--muted);font-size:17.5px;margin-top:14px}

/* ---------- experience ---------- */
#experience{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.exp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:44px;margin-top:50px}
.exp .num{font-family:var(--font-editorial);font-size:52px;font-weight:300;color:var(--gold);line-height:1}
.exp h3{font-family:var(--font-display);font-size:21px;font-weight:700;color:var(--navy);margin:14px 0 10px}
.exp p{color:var(--muted);font-size:16px}

/* ---------- destination ---------- */
#destination{position:relative;color:#fff;overflow:hidden;padding:130px 0;
  background:
    linear-gradient(100deg, rgba(4,16,26,.96) 0%, rgba(5,20,31,.88) 38%, rgba(6,23,35,.72) 68%, rgba(8,28,42,.62) 100%),
    image-set(url(images/niagara.webp) type("image/webp"), url(images/niagara.jpg) type("image/jpeg")) center 40%/cover no-repeat, #0a2233}
.falls{position:absolute;inset:0;overflow:hidden}
.falls i{position:absolute;top:-10%;bottom:-10%;width:2px;background:linear-gradient(180deg,transparent,rgba(127,220,238,.28) 30%,rgba(127,220,238,.07));animation:fall linear infinite}
@keyframes fall{from{transform:translateY(-18%)}to{transform:translateY(18%)}}
.mist{position:absolute;left:0;right:0;bottom:-40px;height:280px;background:radial-gradient(60% 100% at 50% 100%,rgba(127,220,238,.18),transparent 70%);filter:blur(8px)}
#destination .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
@media (max-width:900px){#destination .wrap{grid-template-columns:1fr}}
#destination h2{font-family:var(--font-editorial);font-weight:300;font-size:clamp(34px,4.6vw,58px);line-height:1.1}
#destination h2 b{font-weight:500;color:var(--gold-soft)}
#destination .lead{color:#b9cdd8;font-size:17.5px;margin-top:24px;max-width:520px}
.dest-facts{display:grid;gap:20px}
.df{border-left:2px solid var(--gold);padding:4px 0 4px 20px}
.df .t{font-family:var(--font-display);font-weight:700;font-size:16.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--gold-soft)}
.df .d{color:#d3e2ea;font-size:17.5px;margin-top:5px;line-height:1.6}

/* ---------- partners ---------- */
#partners{background:var(--paper)}
.pt-lead{max-width:820px;color:var(--muted);font-size:18.5px;margin-top:22px}
.pt-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin:42px 0 40px}
.pt-org{margin-top:48px;display:flex;align-items:center;flex-wrap:wrap;gap:18px 26px;color:var(--muted);
  font-size:14.5px;letter-spacing:.14em;text-transform:uppercase;font-family:var(--font-display);font-weight:600}
.pt-org img{max-width:170px;height:auto;flex:0 0 auto}
@media (max-width:760px){
  /* libellé sur sa propre ligne, logos centrés en dessous */
  .pt-org{display:block;text-align:center;line-height:1.6}
  .pt-org .so-label{display:block;margin-bottom:18px}
  .pt-org img{display:block;margin:14px auto !important;max-width:150px !important;width:auto;height:auto}
}
.pt{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:transform .3s ease,box-shadow .3s ease}
.pt:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(6,18,28,.08)}
.pt h3{font-family:var(--font-display);font-size:17px;font-weight:700;color:var(--navy)}
.pt p{color:var(--muted);font-size:14.5px;margin-top:8px}
.pt .org-logo{margin-top:16px;max-width:200px}
.pt-cta{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-3)}
.btn-ghost{border:1.5px solid #c9bda5;color:var(--navy)}
.btn-ghost:hover{border-color:var(--gold);color:#9a8354}

/* ---------- footer ---------- */
footer{background:var(--navy);color:#8fa5b2;padding:60px 0 40px;font-size:14.5px}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
@media (max-width:900px){footer .wrap{grid-template-columns:1fr 1fr}}
footer .brand{font-size:19px}
footer h4{font-family:var(--font-display);color:#fff;font-size:13px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}
footer a{display:block;padding:4px 0;transition:color .2s}
footer a:hover{color:var(--gold-soft)}
footer .base{grid-column:1/-1;border-top:1px solid rgba(143,165,178,.2);margin-top:20px;padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px}

/* ---------- sub-pages (shared) ---------- */
.sub-hero{position:relative;background:radial-gradient(1100px 500px at 75% -10%, #123a52 0%, transparent 55%),linear-gradient(160deg,#081a28 0%,var(--navy) 60%,#04101a 100%);color:#fff;padding:170px 0 80px;overflow:hidden}
.sub-hero .kicker{color:var(--gold)}
.sub-hero h1{font-family:var(--font-display);font-weight:800;font-size:clamp(38px,5.6vw,64px);letter-spacing:-.02em;line-height:1.05}
.sub-hero .lead{font-family:var(--font-editorial);font-weight:300;font-size:clamp(18px,2vw,23px);color:#cfe2ea;margin-top:18px;max-width:720px}
.prose{max-width:820px}
.prose p{margin-bottom:18px;color:#33454f}
.prose h3{font-family:var(--font-display);font-size:24px;color:var(--navy);margin:44px 0 14px}
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:26px;margin-top:44px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px}
.info-card h3{font-family:var(--font-display);font-size:19px;font-weight:700;color:var(--navy);margin-bottom:10px}
.info-card p, .info-card li{color:var(--muted);font-size:16.5px}
.info-card ul{padding-left:20px;margin-top:8px}
.step-list{counter-reset:st;display:grid;gap:0;margin-top:44px;max-width:820px}
.step-item{position:relative;padding:26px 0 26px 92px;border-bottom:1px solid var(--line)}
.step-item::before{counter-increment:st;content:"0" counter(st);position:absolute;left:0;top:22px;font-family:var(--font-editorial);font-size:42px;font-weight:300;color:var(--gold)}
.step-item h3{font-family:var(--font-display);font-size:20px;color:var(--navy);margin-bottom:6px}
.step-item p{color:var(--muted);font-size:16.5px}
.cta-band{background:linear-gradient(120deg,var(--navy) 0%,var(--navy-3) 100%);color:#fff;text-align:center;padding:80px 24px}
.cta-band h2{font-family:var(--font-editorial);font-weight:300;font-size:clamp(26px,3.4vw,40px)}
.cta-band .hero-cta{margin-top:30px}

/* ---------- co-chairs ---------- */
.chair-card{text-align:center}
.chair-card img{width:150px;height:150px;object-fit:cover;border-radius:50%;margin-bottom:16px;border:3px solid var(--gold)}
.chair-card p{line-height:1.5}
#leadership{background:#fff;border-top:1px solid var(--line)}
/* ---------- featured NEW theme card ---------- */
.fr-wide{grid-column:1/-1;min-height:150px;align-items:center;display:flex}
.fr-wide .t{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.fr-new{background:var(--gold);color:var(--navy);font-family:var(--font-display);font-weight:800;font-size:12px;
  letter-spacing:.18em;padding:6px 14px;border-radius:999px}
.bg-7{background:
  repeating-linear-gradient(180deg, rgba(216,180,106,.20) 0 3px, transparent 3px 26px),
  radial-gradient(rgba(127,220,238,.4) 1.4px, transparent 1.6px),
  linear-gradient(180deg,#0d2a3d 0%,#123a52 100%);
  background-size:auto, 22px 22px, auto}

/* ---------- programme themes ---------- */
.theme{border-left:3px solid var(--gold);padding:6px 0 6px 28px;margin-top:40px;max-width:860px;scroll-margin-top:100px}
.theme h3{font-family:var(--font-display);font-size:23px;color:var(--navy);margin-bottom:8px}
.theme p{color:#33454f;font-size:17px}
.theme-new{border-left-color:var(--cyan)}
.theme-new .fr-new{display:inline-block;margin-bottom:10px}

/* ---------- audit pass (08/2026) ---------- */
.navlinks a.active{color:var(--gold) !important}
.navlinks a.active::after{width:100%;background:var(--gold)}

.themes-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 54px;counter-reset:th}
@media (max-width:900px){.themes-grid{grid-template-columns:1fr}}
.themes-grid .theme{border-left:none;padding-left:0;margin-top:36px;max-width:none}
.themes-grid .theme::before{counter-increment:th;content:"0" counter(th);display:block;
  font-family:var(--font-editorial);font-weight:300;font-size:40px;color:var(--gold);opacity:.65;line-height:1;margin-bottom:8px}

.grid-2x2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
@media (min-width:900px){.grid-2x2{grid-template-columns:1fr 1fr}}

/* motifs de hero, très discrets */
.sub-hero{position:relative}
.sub-hero .wrap{position:relative;z-index:2}
.sub-hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.05}
.hero-programme::after{background:repeating-radial-gradient(circle at 78% 120%, transparent 0 34px, #7fdcee 34px 36px)}
.hero-submit::after{background:repeating-linear-gradient(0deg, transparent 0 30px, #7fdcee 30px 31px),
  repeating-linear-gradient(90deg, transparent 0 30px, #7fdcee 30px 31px)}
.hero-about::after{background:repeating-radial-gradient(circle at 15% -30%, transparent 0 48px, #d8b46a 48px 50px)}
.hero-partners::after{background:radial-gradient(#7fdcee 1.6px, transparent 1.8px), repeating-linear-gradient(60deg, transparent 0 46px, #d8b46a 46px 47px);background-size:46px 46px, auto}

/* ---------- architecture 10 pages (08/2026) ---------- */
.alt-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.discipline-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.discipline-tags span{font-family:var(--font-display);font-size:14px;font-weight:600;color:var(--navy);
  border:1.5px solid #d9cfbc;border-radius:999px;padding:9px 20px}
.history-line{display:grid;grid-template-columns:auto 1fr auto;gap:34px;align-items:center;margin-top:48px}
@media (max-width:820px){.history-line{grid-template-columns:1fr;text-align:center}}
.h-end{text-align:center}
.h-year{font-family:var(--font-editorial);font-weight:300;font-size:46px;color:var(--gold);line-height:1}
.h-city{font-family:var(--font-display);font-weight:700;font-size:19px;color:var(--navy);margin-top:6px}
.h-note{font-size:13.5px;color:var(--muted);margin-top:3px}
.h-mid{position:relative;text-align:center;font-family:var(--font-editorial);font-style:italic;font-size:17px;color:var(--muted);padding:22px 10px}
.h-mid::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,var(--gold),#d9cfbc,var(--gold))}
.formats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:26px;margin-top:44px}
.format{border-top:3px solid var(--gold);padding-top:18px}
.format h3{font-family:var(--font-display);font-size:18px;color:var(--navy);margin-bottom:8px}
.format p{color:var(--muted);font-size:15.5px}
.rules-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:22px;margin-top:36px}
.rule{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.rule h3{font-family:var(--font-display);font-size:15px;letter-spacing:.06em;text-transform:uppercase;color:#86682c;margin-bottom:8px}
.rule p{color:var(--ink);font-size:15.5px}
.footer-5{grid-template-columns:1.6fr 1fr 1fr 1fr 1fr !important}
@media (max-width:1000px){.footer-5{grid-template-columns:1fr 1fr !important}}
.hero-speakers::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background:radial-gradient(#d8b46a 2px, transparent 2.4px);background-size:38px 38px}

/* ---------- committees ---------- */
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.member-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.member-card .m-name, .member-line .m-name{font-family:var(--font-display);font-weight:700;font-size:15.5px;color:var(--navy)}
.member-card .m-aff, .member-line .m-aff{font-size:13.5px;color:var(--muted);margin-top:3px}
.member-cols{columns:3;column-gap:44px}
@media (max-width:1000px){.member-cols{columns:2}}
@media (max-width:640px){.member-cols{columns:1}}
.member-line{break-inside:avoid;padding:10px 0;border-bottom:1px solid #efe9dd}
.committee-note{margin-top:26px;font-size:14px;font-style:italic;color:var(--muted)}
/* ---------- FAQ ---------- */
.faq-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.faq-tab{font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:.04em;
  padding:11px 22px;border-radius:999px;border:1.5px solid #d9cfbc;background:transparent;color:var(--navy);
  cursor:pointer;transition:all .2s}
.faq-tab:hover{border-color:var(--gold)}
.faq-tab.active{background:var(--navy);border-color:var(--navy);color:#fff}
.faq-panel{display:none}
.faq-panel.active{display:block}
.faq-panel details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:14px;overflow:hidden}
.faq-panel summary{cursor:pointer;list-style:none;padding:20px 24px;font-family:var(--font-display);
  font-weight:600;font-size:17px;color:var(--navy);position:relative;padding-right:52px}
.faq-panel summary::-webkit-details-marker{display:none}
.faq-panel summary::after{content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-family:var(--font-editorial);font-size:26px;font-weight:300;color:var(--gold);transition:transform .25s}
.faq-panel details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-panel details p{padding:0 24px 18px;color:#33454f;font-size:16px}
.faq-panel details p:first-of-type{padding-top:2px}
.faq-contact{margin-top:54px;text-align:center;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:40px}
.faq-contact h3{font-family:var(--font-display);font-size:21px;color:var(--navy);margin-bottom:8px}
.faq-contact p{color:var(--muted)}

/* ---------- visa page ---------- */
.visa-notice{background:#fdf9ef;border:1.5px solid #e2cf9e;border-left:5px solid var(--gold);
  border-radius:var(--radius);padding:20px 24px;margin:26px 0;color:#5a4a22;font-size:16px}
.visa-important{background:#0d2a3d;color:#cfe2ea;border-radius:var(--radius);padding:28px 32px;margin-top:44px}
.visa-important h3{color:#fff !important}
.visa-important p{color:#cfe2ea !important;margin-bottom:12px}
.resource-card{display:block;text-decoration:none;transition:transform .25s,box-shadow .25s}
.resource-card:hover{transform:translateY(-4px);box-shadow:var(--m-shadow, 0 10px 30px rgba(6,18,28,.1))}
.resource-card .rc-go{display:inline-block;margin-top:12px;font-family:var(--font-display);
  font-weight:700;font-size:13px;letter-spacing:.06em;color:#86682c}

/* no horizontal overflow, ever */
html, body{max-width:100%;overflow-x:hidden}
img{max-width:100%;height:auto}

/* ---------- plenary archive ---------- */
.pl-archive{margin-top:40px}
.pl-year{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.pl-year summary{cursor:pointer;list-style:none;padding:18px 24px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.pl-year summary::-webkit-details-marker{display:none}
.pl-year summary::after{content:"+";margin-left:auto;font-family:var(--font-editorial);font-size:26px;
  font-weight:300;color:var(--gold);transition:transform .25s}
.pl-year[open] summary::after{transform:rotate(45deg)}
.pl-y{font-family:var(--font-display);font-weight:700;font-size:18px;color:var(--navy)}
.pl-city{font-family:var(--font-editorial);font-style:italic;font-size:16px;color:var(--muted)}
.pl-count{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:#86682c;font-weight:600}
.pl-row{display:grid;grid-template-columns:270px 1fr;gap:10px 28px;padding:14px 24px;border-top:1px solid #f0ebe0}
@media (max-width:760px){.pl-row{grid-template-columns:1fr;gap:4px}}
.pl-who{display:flex;flex-direction:column}
.pl-name{font-family:var(--font-display);font-weight:700;font-size:15.5px;color:var(--navy)}
.pl-aff{font-size:13px;color:var(--muted);margin-top:2px}
.pl-title{color:#33454f;font-size:16px}

/* ---------- media kit ---------- */
.code-box{background:#0d2a3d;color:#cfe2ea;border-radius:var(--radius);padding:16px 20px;margin-top:12px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.6;
  overflow-x:auto;white-space:pre-wrap;word-break:break-all;border-left:4px solid var(--gold)}
.code-box.small{font-size:12px;padding:12px 16px}
.banner-row{margin-top:22px;display:grid;gap:34px}
.banner-pair{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
@media (max-width:820px){.banner-pair{grid-template-columns:1fr}}
.banner-item img{max-width:100%;height:auto;border-radius:4px;box-shadow:var(--m-shadow,0 8px 24px rgba(6,18,28,.12))}
.info-card p.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.7;
  color:#33454f;background:#faf7f2;border-radius:6px;padding:14px 16px;margin-top:10px}