/* Identité issue des visuels fournis : noir, rose, jaune, menthe et lilas. */
:root {
  --black: #000;
  --ink: #161616;
  --muted: #62625d;
  --paper: #f7f7f2;
  --line: #deded7;
  --pink: #ffa5a9;
  --yellow: #ffe3a3;
  --green: #9dffd1;
  --purple: #ad9cff;
  --font: Arial, Helvetica, system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
body, button { font-size: 16px; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img { max-width: 100%; display: block; }
svg { flex-shrink: 0; }
h1, h2, h3, h4, p { margin: 0; }
p { line-height: 1.65; }
h2 { font-size: clamp(32px, 3.6vw, 46px); font-weight: 500; line-height: 1.13; letter-spacing: -1.7px; }
h3 { font-weight: 500; }
.container { width: min(1160px, calc(100% - 96px)); margin-inline: auto; }
.section { padding-block: 96px; }
.eyebrow { font-size: 11px; letter-spacing: 1.7px; font-weight: 700; margin-bottom: 20px; line-height: 1.4; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.55; stroke-linecap: round; stroke-linejoin: round; }
.svg-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
:focus-visible { outline: 3px solid #6a45cd; outline-offset: 5px; border-radius: 3px; }
.site-header :focus-visible, .hero :focus-visible, .site-footer :focus-visible { outline-color: var(--green); }
.skip-link { position: fixed; z-index: 50; top: -100px; left: 16px; background: var(--green); color: black; padding: 14px 20px; }
.skip-link:focus { top: 16px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 25px; min-height: 48px; padding: 15px 24px; border: 1px solid transparent; border-radius: 5px; font-size: 13px; font-weight: 600; transition: background .18s, transform .18s, border-color .18s; cursor: pointer; line-height: 1.3; }
.button-primary { background: var(--green); color: black; min-width: 205px; }
.button-primary:hover { background: #c2ffe3; transform: translateY(-2px); }
.text-link { display: inline-flex; align-items: center; gap: 16px; font-size: 13px; font-weight: 600; padding-block: 10px; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.pink { background: var(--pink); }
.yellow { background: var(--yellow); }
.green { background: var(--green); }
.purple { background: var(--purple); }

/* Navigation fixe. */
.site-header { position: fixed; z-index: 20; inset: 0 0 auto; background: var(--black); color: white; border-bottom: 1px solid #242424; }
.header-inner { height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: block; flex-shrink: 0; }
.brand img { width: 153px; height: auto; }
.desktop-nav { display: flex; gap: 27px; margin-left: auto; margin-right: 20px; }
.desktop-nav a { color: #acaca8; font-size: 12px; padding-block: 17px; position: relative; transition: color .18s; }
.desktop-nav a:hover, .desktop-nav .is-current { color: white; }
.desktop-nav .is-current::after { content: ''; position: absolute; height: 2px; background: var(--green); left: 0; right: 0; bottom: 8px; }
.header-cta { color: white; border-color: #62625d; min-height: 39px; padding: 10px 15px; font-size: 11px; gap: 20px; }
.header-cta .icon { width: 16px; height: 16px; }
.header-cta:hover { background: white; color: black; }
.menu-toggle { display: none; }
.mobile-nav[hidden] { display: none; }
.mobile-nav { padding: 5px 24px 18px; display: flex; flex-direction: column; border-top: 1px solid #333; }
.mobile-nav a { padding: 15px 0; font-size: 15px; }

/* Le hero reprend la composition horizontale des quatre motifs. */
.hero { background: var(--black); color: white; padding-top: 80px; }
.hero-content { text-align: center; padding-top: 54px; }
.event-label { display: inline-flex; gap: 9px; align-items: center; border: 1px solid #42423d; border-radius: 20px; padding: 8px 13px; font-size: 9px; font-weight: 600; letter-spacing: 1.35px; color: #dfdfd9; }
.label-dot { width: 5px; height: 5px; background: var(--green); border-radius: 50%; }
.hero-date { font-size: 13px; color: #c3c3bd; margin-top: 22px; }
.hero-date span { margin-inline: 9px; color: #6c6c65; }
.hero h1 { font-size: clamp(52px, 7.7vw, 104px); font-weight: 400; line-height: 1.1; letter-spacing: -5px; margin-top: 17px; }
.hero h1 span { color: var(--purple); }
.hero-description { width: min(640px, 100%); margin: 23px auto 25px; color: #b6b6b0; font-size: 14px; line-height: 1.7; }
.hero-registration { font-size: 10px; color: #b6b6b0; margin-top: 15px; }
.hero-registration span { color: #62625d; margin: 0 8px; }
.hero-art { width: 100%; height: auto; margin-top: 45px; margin-bottom: 33px; object-fit: contain; }
.hero-meta { border-top: 1px solid #33332e; padding: 24px 0 26px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.hero-meta > div { display: flex; align-items: center; justify-content: center; gap: 11px; color: #cecec8; font-size: 12px; }
.hero-meta .icon { color: #b6b6b0; width: 17px; height: 17px; }

/* En bref. */
.brief-section { background: var(--paper); border-bottom: 1px solid var(--line); }
.section-intro { display: grid; grid-template-columns: minmax(0, 1fr) 365px; column-gap: 60px; align-items: end; }
.section-intro .eyebrow { grid-column: 1 / -1; }
.intro-copy { max-width: 365px; color: var(--muted); font-size: 14px; }
.brief-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; margin-top: 55px; }
.item-number { display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; width: 34px; height: 34px; font-size: 11px; font-weight: 600; margin-bottom: 19px; }
.brief-item h3 { font-size: 19px; letter-spacing: -.35px; margin-bottom: 10px; }
.brief-item p { font-size: 13px; color: var(--muted); max-width: 310px; }

/* Programme en timeline verticale. */
.programme-section { background: #fff; }
.programme-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 90px; }
.programme-heading > p:not(.eyebrow) { color: var(--muted); font-size: 13px; margin: 25px 0 20px; }
.timeline { padding: 0 0 0 27px; margin: 0; list-style: none; position: relative; }
.timeline::before { content: ''; position: absolute; left: 5px; top: 12px; bottom: 60px; width: 1px; background: var(--line); }
.timeline li { display: grid; grid-template-columns: 125px 1fr; gap: 18px; padding: 4px 0 27px; position: relative; }
.timeline li:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; left: -27px; top: 9px; width: 11px; height: 11px; border-radius: 50%; border: 2px solid white; background: #cccac2; }
.timeline .time { font-size: 11px; color: var(--muted); padding-top: 2px; font-weight: 600; white-space: nowrap; }
.timeline h3 { font-size: 16px; line-height: 1.45; }
.timeline li div > p { font-size: 12px; color: var(--muted); line-height: 1.65; margin-top: 6px; }
.timeline-workshops .timeline-dot { background: var(--purple); box-shadow: 0 0 0 3px #f0ecff; }
.timeline-workshops h3 { font-weight: 600; }
.small-badge { display: inline-block; background: #eee8ff; padding: 4px 7px; font-size: 9px; border-radius: 3px; margin-left: 9px; font-weight: 500; vertical-align: 2px; }

/* Même architecture pour les quatre cartes. */
.workshops-section { border-block: 1px solid var(--line); }
.workshops-heading { display: flex; justify-content: space-between; align-items: end; gap: 50px; }
.workshops-heading > p { max-width: 415px; font-size: 13px; color: var(--muted); }
.choice-notice { display: flex; align-items: center; gap: 12px; padding: 18px 0 0; margin-top: 18px; font-size: 12px; }
.choice-notice .icon { width: 17px; height: 17px; }
.choice-notice strong { font-weight: 600; }
.workshop-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 33px; align-items: stretch; }
.workshop-card { background: white; border: 1px solid #ddded6; border-top: 4px solid var(--accent); border-radius: 8px; padding: 25px 31px 21px; display: flex; flex-direction: column; min-width: 0; }
.card-colabia { --accent: var(--yellow); --tint: #fff9eb; }
.card-isit { --accent: var(--purple); --tint: #f7f4ff; }
.card-antadis { --accent: var(--pink); --tint: #fff5f4; }
.card-trust { --accent: var(--green); --tint: #f0fff6; }
.card-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 123px; margin-bottom: 18px; }
.card-heading h3 { flex: 1; min-width: 0; font-size: 27px; line-height: 1.2; letter-spacing: -.9px; overflow-wrap: break-word; }
.card-heading img { width: 122px; height: 122px; object-fit: contain; flex-shrink: 0; }
.card-body > p { font-size: 12px; line-height: 1.75; color: var(--muted); }
.card-body .workshop-speakers { margin-top: 22px; font-size: 13px; line-height: 1.5; color: var(--ink); font-weight: 600; }
.workshop-speakers span { display: block; font-size: 10px; letter-spacing: 1px; font-weight: 500; color: var(--muted); margin-bottom: 6px; }
.card-footer { margin-top: auto; padding-top: 27px; }
.registration-button { display: flex; width: 100%; background: var(--ink); color: white; font-size: 12px; justify-content: space-between; gap: 10px; border-radius: 4px; }
.registration-button[aria-disabled="true"] { color: #575752; background: #eeeee7; cursor: not-allowed; border-color: #e3e3da; }
a.registration-button:hover { color: var(--ink); background: var(--accent); }
.partner-links { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; }
.partner-links .partner-link { margin-inline: 0; }
.partner-link { display: block; width: fit-content; margin: 14px auto 0; font-size: 10px; color: var(--muted); padding: 5px; }
.partner-link span[aria-hidden] { margin-left: 6px; }
.partner-link:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* Informations et partenaires. */
.info-section { background: white; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 44px; }
.info-block { padding-right: 30px; }
.info-block + .info-block { border-left: 1px solid var(--line); padding-left: 37px; }
.info-block > .icon { width: 23px; height: 23px; margin-bottom: 19px; }
.info-block h3 { font-size: 18px; margin-bottom: 15px; letter-spacing: -.4px; }
.info-block p { color: var(--muted); font-size: 12px; line-height: 1.9; }
.info-block strong { font-weight: 500; color: var(--ink); }
.info-block .text-link { font-size: 11px; margin-top: 13px; gap: 12px; }
.partners-section { background: white; border-top: 1px solid var(--line); padding-block: 35px; }
.partners-inner { display: flex; align-items: center; gap: 68px; }
.partners-inner h2 { font-size: 12px; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.partner-strip { display: grid; grid-template-columns: repeat(4, 1fr); flex: 1; gap: 30px; }
.partner-strip a { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 500; padding: 10px 0; white-space: nowrap; }
.partner-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.external-arrow { font-size: 12px; color: var(--muted); margin-left: auto; }
.partner-strip a:hover { text-decoration: underline; text-underline-offset: 5px; }
.site-footer { background: var(--black); color: white; padding-block: 32px; }
.footer-inner { display: flex; gap: 35px; align-items: center; justify-content: space-between; }
.footer-inner p { font-size: 11px; color: #b6b6b0; }
.footer-inner p span { margin-inline: 9px; color: #62625d; }
.footer-inner > a:last-child { font-size: 11px; color: #b6b6b0; }
.footer-inner > a:last-child span { margin-left: 6px; }

@media (min-width: 1440px) {
  .container { width: min(1280px, calc(100% - 120px)); }
  .hero h1 { font-size: 112px; }
  .hero-content { padding-top: 65px; }
  .hero-art { margin-top: 55px; }
}
@media (max-width: 1050px) {
  .container { width: calc(100% - 56px); }
  .desktop-nav { gap: 18px; margin-right: 0; }
  .header-inner { gap: 24px; }
  .section-intro { grid-template-columns: minmax(0, 1fr) 300px; column-gap: 40px; }
  .intro-copy { max-width: 300px; }
  .programme-layout { gap: 44px; grid-template-columns: 1fr 1.6fr; }
  .timeline li { grid-template-columns: 110px 1fr; gap: 12px; }
  .workshops-heading { gap: 30px; }
  .workshops-heading > p { max-width: 340px; }
  .workshop-card { padding-inline: 24px; }
  .partner-strip { gap: 23px; }
  .partners-inner { gap: 35px; }
  .partner-strip a { font-size: 15px; }
}
@media (max-width: 800px) {
  html { scroll-padding-top: 90px; }
  .container { width: calc(100% - 40px); }
  .header-inner { height: 70px; gap: 18px; }
  .brand img { width: 128px; }
  .desktop-nav { display: none; }
  .header-cta { margin-left: auto; }
  .menu-toggle { display: flex; position: relative; flex-direction: column; justify-content: center; align-items: center; gap: 6px; width: 40px; height: 40px; background: none; border: 1px solid #555; border-radius: 4px; cursor: pointer; flex-shrink: 0; }
  .menu-toggle span { width: 16px; height: 1px; background: white; transition: transform .2s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { padding-top: 70px; }
  .hero h1 { letter-spacing: -3px; font-size: 64px; }
  .hero-meta { gap: 15px; }
  .hero-meta > div { font-size: 10px; gap: 7px; }
  .section { padding-block: 72px; }
  .section-intro { display: block; }
  .intro-copy { position: static; max-width: 460px; margin-top: 24px; }
  .brief-grid { gap: 24px; margin-top: 37px; }
  .programme-layout { grid-template-columns: 1fr; gap: 35px; }
  .programme-heading h2 br { display: none; }
  .programme-heading > p:not(.eyebrow) { margin-bottom: 8px; }
  .timeline li { grid-template-columns: 140px 1fr; gap: 18px; padding-bottom: 30px; }
  .workshops-heading { display: block; }
  .workshops-heading > p { max-width: 550px; margin-top: 22px; }
  .workshop-grid { gap: 18px; }
  .workshop-card { padding-inline: 19px; }
  .card-heading img { width: 96px; height: 96px; }
  .card-heading h3 { font-size: 24px; }
  .registration-button { font-size: 11px; padding-inline: 13px; }
  .info-block + .info-block { padding-left: 24px; }
  .info-block { padding-right: 18px; }
  .partners-inner { gap: 22px; }
  .partner-strip { gap: 18px; }
  .partner-strip a { font-size: 13px; gap: 6px; }
  .footer-inner { gap: 18px; }
}
@media (max-width: 600px) {
  h2 { font-size: 34px; letter-spacing: -1.3px; }
  .header-inner { gap: 10px; }
  .header-cta { font-size: 10px; padding: 10px 12px; gap: 9px; }
  .header-cta .icon { width: 13px; height: 13px; }
  .brand img { width: 112px; }
  .menu-toggle { width: 35px; height: 39px; }
  .hero-content { padding-top: 38px; }
  .event-label { font-size: 8px; letter-spacing: 1px; padding: 8px 11px; }
  .hero-date { font-size: 10px; margin-top: 20px; }
  .hero-date span { margin-inline: 4px; }
  .hero h1 { font-size: clamp(43px, 12.5vw, 70px); letter-spacing: -2.5px; max-width: 390px; margin: 20px auto 0; }
  .hero-description { font-size: 12px; line-height: 1.8; margin-top: 22px; margin-bottom: 24px; }
  .hero .button-primary { width: 100%; justify-content: space-between; }
  .hero-registration { font-size: 9px; max-width: 300px; margin-inline: auto; line-height: 1.9; }
  .hero-registration span { margin-inline: 4px; }
  .hero-art { margin-top: 35px; margin-bottom: 25px; }
  .hero-meta { flex-direction: column; align-items: flex-start; gap: 15px; padding-block: 23px; }
  .hero-meta > div { font-size: 11px; gap: 10px; }
  .section { padding-block: 58px; }
  .eyebrow { font-size: 10px; margin-bottom: 17px; }
  .intro-copy { font-size: 13px; margin-top: 19px; }
  .brief-grid { grid-template-columns: 1fr; gap: 23px; margin-top: 30px; }
  .brief-item { display: grid; grid-template-columns: 34px 1fr; column-gap: 17px; }
  .item-number { grid-row: 1 / 3; margin-bottom: 0; margin-top: 2px; }
  .brief-item h3 { font-size: 18px; margin-bottom: 5px; }
  .brief-item p { font-size: 12px; }
  .programme-layout { gap: 32px; }
  .timeline { padding-left: 22px; }
  .timeline::before { left: 5px; bottom: 85px; }
  .timeline li { grid-template-columns: 1fr; gap: 7px; padding-bottom: 27px; }
  .timeline-dot { left: -22px; top: 8px; }
  .timeline .time { font-size: 10px; }
  .timeline h3 { font-size: 16px; }
  .timeline li div > p { margin-top: 4px; font-size: 12px; }
  .workshops-heading > p { font-size: 12px; margin-top: 19px; }
  .choice-notice { font-size: 11px; padding-top: 11px; gap: 10px; align-items: flex-start; }
  .choice-notice .icon { margin-top: 3px; }
  .workshop-grid { grid-template-columns: 1fr; gap: 20px; margin-top: 27px; }
  .workshop-card { padding: 21px 23px 20px; }
  .card-heading { min-height: 110px; margin-bottom: 19px; gap: 14px; }
  .card-heading img { width: 116px; height: 116px; }
  .card-heading h3 { font-size: 24px; }
  .card-body > p { font-size: 12px; }
  .registration-button { font-size: 12px; padding-inline: 17px; min-height: 49px; }
  .card-footer { padding-top: 24px; }
  .info-grid { grid-template-columns: 1fr; margin-top: 33px; gap: 27px; }
  .info-block { padding: 0 0 27px; display: grid; grid-template-columns: 30px 1fr; column-gap: 16px; border-bottom: 1px solid var(--line); }
  .info-block + .info-block { border-left: none; padding-left: 0; }
  .info-block:last-child { border-bottom: none; padding-bottom: 0; }
  .info-block > .icon { grid-row: 1 / 4; margin-top: 1px; }
  .info-block h3 { font-size: 18px; margin-bottom: 11px; }
  .info-block .text-link { width: fit-content; margin-top: 8px; }
  .partners-section { padding-block: 27px; }
  .partners-inner { display: block; }
  .partners-inner h2 { font-size: 11px; margin-bottom: 15px; }
  .partner-strip { grid-template-columns: repeat(2, 1fr); gap: 8px 27px; }
  .partner-strip a { font-size: 15px; gap: 9px; }
  .site-footer { padding-block: 28px; }
  .footer-inner { flex-wrap: wrap; gap: 22px; }
  .footer-inner .brand { margin-right: auto; }
  .footer-inner p { width: 100%; order: 3; font-size: 10px; border-top: 1px solid #33332e; padding-top: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Sponsor confirmé : logo BCV fourni, non recolorié et sans déformation. */
.sponsor-row { display: flex; align-items: center; gap: 40px; padding-bottom: 30px; margin-bottom: 25px; border-bottom: 1px solid var(--line); }
.sponsor-label { color: var(--muted); font-size: 12px; }
.sponsor-logo { width: 180px; height: auto; flex-shrink: 0; }
@media (max-width: 600px) {
  .sponsor-row { gap: 24px; padding-bottom: 25px; margin-bottom: 23px; }
  .sponsor-label { font-size: 11px; }
  .sponsor-logo { width: 158px; }
}