/* =============================================
   Disrupt AI — Page d'accueil
   Palette : dark sombre & vibrant (orange / corail)
   ============================================= */

:root{
  --ink:#0d0e15;          /* Fond profond (dark base) */
  --ink-2:#0a0b11;
  --surface:#12141c;      /* Surface */
  --surface-2:#181a24;    /* Surface & relief */
  --border:rgba(255,255,255,0.09);
  --border-soft:rgba(255,255,255,0.06);
  --text:#f4f5f9;         /* Typographie */
  --muted:#9a9dac;
  --muted-2:#6b6e7d;
  --accent-1:#ff6a00;     /* Accent vif 1 — orange incandescent */
  --accent-2:#ff3d63;     /* Accent vif 2 — corail néon */
  --glow:#ffb899;         /* Pointe de lumière */
  --grad:linear-gradient(135deg,#ff6a00 0%,#ff3d63 100%);
  --on-accent:#1a0800;
  --radius:18px;
  --maxw:1200px;
  --nav-pad-y:18px;
  --nav-btn-h:40px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  background:var(--ink);
  color:var(--text);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ===== Icônes outline glow ===== */
.icon-sprite{position:absolute;width:0;height:0;overflow:hidden;}
.ico-svg{
  display:block;
  fill:none;
  stroke:url(#dz-grad);
  stroke-width:1.6;
  stroke-linecap:round;
  stroke-linejoin:round;
  filter:drop-shadow(0 0 5px rgba(255,106,0,.55)) drop-shadow(0 0 13px rgba(255,61,99,.3));
  transition:filter .25s ease;
}
.ico-svg--soft{filter:drop-shadow(0 0 4px rgba(255,106,0,.4));}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--glow);
  background:rgba(255,106,0,0.10);
  border:1px solid rgba(255,106,0,0.30);
  padding:6px 14px;border-radius:999px;
}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.01em;}
p{margin:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:10px;font-weight:700;font-size:15px;
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;line-height:1;
}
.btn-primary{background:var(--grad);color:var(--on-accent);box-shadow:0 10px 28px rgba(255,106,0,.30);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(255,61,99,.42);}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--border);color:var(--text);}
.btn-ghost:hover{background:rgba(255,255,255,.09);}
.btn-sm{padding:0 20px;font-size:13px;height:var(--nav-btn-h);}
.btn-link{color:var(--glow);font-weight:700;font-size:14px;text-decoration:none;display:inline-flex;align-items:center;gap:6px;}
.btn-link:hover{text-decoration:underline;}

/* ===== Wordmark Disrupt AI ===== */
.brand-word{font-weight:800;letter-spacing:-.02em;line-height:1;white-space:nowrap;}
.brand-word em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.brand-word--lg{font-size:26px;}
.brand-word--md{font-size:21px;}

/* ===== Header — pleine largeur, rythme vertical harmonisé ===== */
header{
  position:sticky;top:0;z-index:60;
  background:rgba(13,14,21,0.80);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-soft);
}
header .wrap{max-width:none;margin:0;padding:0 36px;}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:var(--nav-pad-y) 0;gap:32px;flex-wrap:nowrap;
  min-height:calc(var(--nav-btn-h) + var(--nav-pad-y) * 2);
}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;letter-spacing:-.01em;flex-shrink:0;white-space:nowrap;}
.logo .mark{width:32px;height:32px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:900;color:var(--on-accent);box-shadow:0 4px 16px rgba(255,106,0,.35);flex-shrink:0;}
.logo .divider{width:1px;height:22px;background:var(--border);margin:0 6px;flex-shrink:0;}
.logo .sub{font-size:13px;font-weight:700;color:var(--muted);white-space:nowrap;}
nav.links{display:flex;gap:26px;align-items:center;flex:1 1 auto;justify-content:center;min-width:0;}
nav.links a{font-size:14px;font-weight:600;color:var(--muted);text-decoration:none;transition:color .15s;white-space:nowrap;}
nav.links a:hover{color:var(--text);}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.burger{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;line-height:1;padding:8px;}

/* Hero — dégradé orange / corail */
.hero{position:relative;padding:80px 0 0;overflow:hidden;background:var(--ink);}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(1100px 620px at 50% 118%, rgba(255,106,0,.46), transparent 60%),
    radial-gradient(700px 420px at 90% 5%, rgba(255,61,99,.24), transparent 60%),
    radial-gradient(600px 380px at 0% 0%, rgba(255,184,153,.14), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 60%, #0c0d14 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.9), transparent 75%);
}
.hero-inner{position:relative;z-index:1;padding-bottom:0;}
.fost-badge{
  display:inline-flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--border);
  padding:8px 16px 8px 8px;border-radius:999px;font-size:13px;font-weight:700;color:var(--muted);
  text-decoration:none;margin-bottom:28px;
}
.fost-badge .fost-mark{background:#fff;color:var(--ink);border-radius:999px;padding:3px 10px;font-size:11px;font-weight:900;letter-spacing:.04em;}
.fost-badge:hover{background:rgba(255,255,255,.09);}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:start;padding:0 0 56px;}
.hero h1{font-size:50px;line-height:1.1;margin-bottom:22px;max-width:620px;}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-desc{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:30px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:22px 30px;margin-bottom:32px;}
.meta-item{display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--text);font-weight:700;}
.meta-item .ico-svg{width:19px;height:19px;flex-shrink:0;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center;}

/* Registration inline card */
.reg-card{
  background:rgba(18,20,28,.75);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px;
  backdrop-filter:blur(10px);
}
.reg-card h3{font-size:18px;margin-bottom:4px;}
.reg-card .sub{font-size:13px;color:var(--muted);margin-bottom:20px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.form-field{margin-bottom:12px;}
.form-field label{display:block;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:6px;}
.form-field input,.form-field select{
  width:100%;padding:11px 13px;background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:9px;
  color:var(--text);font-size:14px;font-family:inherit;
}
.form-field input:focus,.form-field select:focus{outline:none;border-color:var(--accent-1);box-shadow:0 0 0 3px rgba(255,106,0,.15);}
.reg-card button{width:100%;margin-top:6px;height:48px;}
.reg-note{font-size:11px;color:var(--muted-2);margin-top:14px;text-align:center;display:flex;align-items:center;justify-content:center;gap:6px;}
.reg-note .ico-svg{width:13px;height:13px;}

/* Stats strip */
.stats-strip{position:relative;z-index:1;border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);background:rgba(255,255,255,.02);}
.stats-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.stat-cell{padding:28px 20px;text-align:center;border-left:1px solid var(--border-soft);}
.stat-cell:first-child{border-left:none;}
.stat-num{font-size:28px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.stat-label{font-size:12.5px;color:var(--muted);margin-top:4px;}

section{padding:96px 0;position:relative;}
.section-alt{background:var(--surface);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center;}
.section-head .eyebrow{margin-bottom:16px;}
.section-head h2{font-size:38px;margin-bottom:14px;line-height:1.15;}
.section-head p{color:var(--muted);font-size:16.5px;}

/* ===== Schéma FOST -> 3 jours ===== */
.fost-schema{
  display:grid;grid-template-columns:236px 64px 1fr;align-items:stretch;
  background:rgba(255,255,255,.02);border:1px solid var(--border);
  border-radius:24px;padding:22px;
}
.fost-parent{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:16px 8px 16px 14px;}
.fs-logo{height:30px;width:auto;max-width:150px;object-fit:contain;object-position:left center;margin-bottom:22px;align-self:flex-start;mix-blend-mode:screen;}
.fs-label{font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);margin-bottom:8px;}
.fs-name{font-size:15.5px;font-weight:800;color:var(--text);line-height:1.3;margin-bottom:4px;}
.fs-sub{font-size:13px;color:var(--muted);margin-bottom:18px;}
.fs-dates{font-size:12.5px;font-weight:700;color:var(--glow);line-height:1.55;}
.fost-connector{display:flex;align-items:center;justify-content:center;}
.fost-arrow{width:36px;height:36px;border-radius:50%;background:rgba(255,106,0,.18);border:1px solid rgba(255,106,0,.45);display:flex;align-items:center;justify-content:center;}
.fost-arrow .ico-svg{width:17px;height:17px;}

/* 3 jours FOST timeline */
.timeline-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.tl-card{
  background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 22px;position:relative;text-decoration:none;color:inherit;display:block;transition:border-color .2s, transform .2s;
}
.tl-card:hover{transform:translateY(-4px);}
.tl-card.active{border-color:rgba(255,106,0,.55);background:linear-gradient(165deg,rgba(255,106,0,.16),var(--surface-2));}
.tl-card.external:hover{border-color:rgba(255,61,99,.5);}
.tl-tag{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.09em;color:var(--muted-2);}
.tl-card.active .tl-tag{color:var(--glow);}
.tl-logo{height:34px;display:flex;align-items:center;margin:16px 0 14px;}
.tl-logo img{max-height:34px;max-width:175px;width:auto;height:auto;object-fit:contain;object-position:left center;}
.tl-date{font-size:20px;font-weight:800;margin:0 0 10px;}
.tl-audience{font-size:12.5px;color:var(--muted-2);margin-bottom:14px;min-height:38px;}
.tl-cta{font-size:12.5px;font-weight:700;color:var(--glow);display:flex;align-items:center;gap:6px;}
.tl-badge{position:absolute;top:20px;right:20px;background:var(--grad);color:var(--on-accent);font-size:10.5px;font-weight:800;padding:4px 10px;border-radius:999px;letter-spacing:.04em;}

.schema-signature{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:22px;font-size:13px;color:var(--muted-2);flex-wrap:wrap;}
.schema-signature img{height:22px;width:auto;}

.fost-note{
  margin-top:28px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 32px;display:flex;gap:22px;align-items:flex-start;
}
.fost-note .ico-svg{width:28px;height:28px;flex-shrink:0;margin-top:2px;}
.fost-note p{color:var(--muted);font-size:15px;}
.fost-note strong{color:var(--text);}
.fost-note a{color:var(--glow);text-decoration:none;font-weight:700;}
.fost-note a:hover{text-decoration:underline;}

/* Pourquoi participer - 4 cards */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.why-card{background:var(--surface-2);border:1px solid var(--border);border-radius:16px;padding:26px 22px;transition:border-color .2s ease;}
.why-card:hover{border-color:rgba(255,106,0,.4);}
.why-ico{width:42px;height:42px;border-radius:11px;background:rgba(255,106,0,.10);border:1px solid rgba(255,106,0,.24);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.why-ico .ico-svg{width:21px;height:21px;}
.why-card h4{font-size:15.5px;margin-bottom:8px;}
.why-card p{font-size:13.5px;color:var(--muted);}

/* Tracks */
.tracks-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.track-card{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:28px;}
.track-num{font-size:12.5px;font-weight:800;color:var(--glow);letter-spacing:.06em;margin-bottom:10px;text-transform:uppercase;}
.track-card h3{font-size:19px;margin-bottom:14px;}
.track-card > p.desc{font-size:14px;color:var(--muted);margin-bottom:18px;}
.track-sessions{list-style:none;margin:0;padding:0;}
.track-sessions li{display:flex;gap:10px;font-size:13.5px;color:var(--muted);padding:9px 0;border-top:1px solid var(--border-soft);}
.track-sessions li:first-child{border-top:none;}
.fmt-tag{flex-shrink:0;font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:var(--glow);background:rgba(255,106,0,.14);border-radius:6px;padding:2px 7px;height:fit-content;}

/* Formats */
.formats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.format-tile{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:22px;transition:border-color .2s ease;}
.format-tile:hover{border-color:rgba(255,61,99,.4);}
.format-tile .ico-svg{width:25px;height:25px;margin-bottom:14px;}
.format-tile h4{font-size:14.5px;margin-bottom:6px;}
.format-tile .tag{font-size:10.5px;font-weight:800;text-transform:uppercase;color:var(--muted-2);letter-spacing:.06em;margin-bottom:8px;display:block;}
.format-tile p{font-size:12.5px;color:var(--muted);}

.stat-row{display:flex;flex-wrap:wrap;gap:16px;}
.stat-pill{flex:1;min-width:150px;background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:18px 20px;text-align:center;}
.stat-pill .n{font-size:24px;font-weight:800;color:var(--glow);}
.stat-pill .l{font-size:12.5px;color:var(--muted);margin-top:4px;}

/* Programme tabs */
.prog-tabs{display:flex;gap:10px;margin-bottom:28px;justify-content:center;flex-wrap:wrap;}
.prog-tab{padding:11px 20px;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);font-size:13.5px;font-weight:700;color:var(--muted);cursor:pointer;line-height:1;}
.prog-tab.active{background:var(--grad);color:var(--on-accent);border-color:transparent;}
.prog-list{max-width:820px;margin:0 auto;}
.prog-item{display:grid;grid-template-columns:90px 1fr auto;gap:18px;align-items:flex-start;padding:18px 0;border-top:1px solid var(--border-soft);}
.prog-item:first-child{border-top:none;}
.prog-time{font-weight:800;font-size:14.5px;color:var(--glow);}
.prog-desc h4{font-size:15px;margin-bottom:4px;display:flex;align-items:center;gap:8px;}
.prog-desc h4 .ico-svg{width:16px;height:16px;flex-shrink:0;}
.prog-desc p{font-size:13px;color:var(--muted);}
.prog-room{font-size:11.5px;color:var(--muted-2);background:var(--surface-2);border:1px solid var(--border);padding:4px 10px;border-radius:999px;white-space:nowrap;height:fit-content;}
.prog-panel{display:none;}
.prog-panel.active{display:block;}

/* Venue */
.venue-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}
.venue-grid h2{font-size:32px;margin-bottom:18px;}
.venue-grid p.lead{color:var(--muted);font-size:16px;margin-bottom:26px;}
.venue-feat{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--border-soft);}
.venue-feat:first-of-type{border-top:none;}
.venue-feat .ico{width:40px;height:40px;border-radius:11px;background:rgba(255,106,0,.08);border:1px solid rgba(255,106,0,.22);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.venue-feat .ico-svg{width:19px;height:19px;}
.venue-feat h4{font-size:15px;margin-bottom:4px;}
.venue-feat p{font-size:13.5px;color:var(--muted);}
.map-card{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:8px;}
.map-frame{border-radius:10px;overflow:hidden;border:1px solid var(--border);height:280px;}
.map-frame iframe{width:100%;height:100%;border:0;filter:grayscale(.4) invert(.9) contrast(.85);}
.map-addr{padding:18px 12px 8px;font-size:14.5px;}
.map-addr strong{display:block;font-size:16px;margin-bottom:4px;}
.map-addr span{color:var(--muted);}

/* Veille */
.veille-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.veille-card{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:24px;text-decoration:none;color:inherit;display:block;transition:border-color .15s, transform .15s;}
.veille-card:hover{border-color:rgba(255,61,99,.45);transform:translateY(-3px);}
.veille-tag{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--glow);margin-bottom:10px;}
.veille-card h4{font-size:15.5px;margin-bottom:8px;line-height:1.35;}
.veille-card p{font-size:13px;color:var(--muted);}

/* Newsletter CTA */
.newsletter{
  background:linear-gradient(135deg, rgba(255,106,0,.18), rgba(255,61,99,.12));
  border:1px solid var(--border);border-radius:22px;
  padding:44px 48px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;
}
.newsletter h3{font-size:22px;margin-bottom:8px;}
.newsletter p{color:var(--muted);font-size:14.5px;}

footer{border-top:1px solid var(--border-soft);padding:56px 0 30px;background:var(--ink-2);}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px;}
.footer-brand p{color:var(--muted);font-size:13.5px;max-width:300px;margin-top:14px;}
.footer-col h5{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted-2);margin-bottom:16px;}
.footer-col a{display:block;color:var(--muted);text-decoration:none;font-size:14px;margin-bottom:11px;}
.footer-col a:hover{color:var(--text);}
.contact-card{font-size:13.5px;color:var(--muted);margin-bottom:16px;}
.contact-card strong{display:block;color:var(--text);font-size:14.5px;}
.footer-bottom{border-top:1px solid var(--border-soft);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:var(--muted-2);}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(13,14,21,.85);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;z-index:100;padding:20px;
}
.modal-overlay.open{display:flex;}
.modal{background:var(--surface-2);border:1px solid var(--border);border-radius:18px;padding:38px;max-width:420px;text-align:center;}
.modal .ico{width:60px;height:60px;border-radius:50%;background:rgba(255,106,0,.12);border:1px solid rgba(255,106,0,.3);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;}
.modal .ico-svg{width:28px;height:28px;}
.modal h3{font-size:20px;margin-bottom:10px;}
.modal p{color:var(--muted);font-size:14.5px;margin-bottom:22px;}
.modal .btn-sm{height:42px;}

/* ── Nav : paliers de compression avant bascule mobile ── */
@media (max-width: 1420px){
  header .wrap{padding:0 26px;}
  .nav{gap:22px;}
  nav.links{gap:20px;}
}
@media (max-width: 1240px){
  :root{--nav-btn-h:38px;}
  .logo .divider,.logo .sub{display:none;}
  nav.links{gap:16px;}
  nav.links a{font-size:13.5px;}
  .btn-sm{padding:0 16px;font-size:12.5px;}
}
@media (max-width: 1060px){
  nav.links{gap:12px;}
  nav.links a{font-size:13px;}
}

@media (max-width: 980px){
  :root{--nav-pad-y:14px;--nav-btn-h:38px;}
  header .wrap{padding:0 20px;}
  nav.links{display:none;}
  .burger{display:block;}
  .hero-grid{grid-template-columns:1fr;}
  .hero h1{font-size:34px;}
  .stats-strip .wrap{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(3){border-left:none;}
  .fost-schema{grid-template-columns:1fr;padding:18px;}
  .fost-parent{padding:10px 6px 6px;align-items:center;text-align:center;}
  .fs-logo{align-self:center;object-position:center;}
  .fost-connector{height:56px;}
  .fost-arrow{transform:rotate(90deg);}
  .tl-audience{min-height:0;}
  .section-head h2{font-size:28px;}
  .timeline-3,.why-grid,.tracks-grid,.venue-grid,.veille-grid,.footer-grid{grid-template-columns:1fr;}
  .formats-grid{grid-template-columns:repeat(2,1fr);}
  .form-row{grid-template-columns:1fr;}
  .prog-item{grid-template-columns:1fr;gap:6px;}
  .newsletter{flex-direction:column;align-items:flex-start;}
}
@media (max-width: 620px){
  .nav-cta .btn-ghost{display:none;}
  .formats-grid{grid-template-columns:1fr;}
  .newsletter{padding:32px 24px;}
  section{padding:64px 0;}
}