/* L'Acteur Collaboratif - Prototype one-page
   Direction visuelle : éditoriale, humaine, organique, inspirée des studios de design social.
*/
:root {
  --ink: #17231f;
  --ink-soft: #48544f;
  --paper: #fbfaf6;
  --soft: #f0eee6;
  --white: #ffffff;
  --coral: #ef6b56;
  --coral-dark: #d65542;
  --lime: #d7ea86;
  --violet: #9d83da;
  --mint: #acd8c5;
  --line: rgba(23,35,31,.15);
  --radius: 26px;
  --shadow: 0 24px 70px rgba(23,35,31,.10);
  --container: min(1200px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; }
h1,h2,h3,p { margin-top: 0; }
h1,h2,h3 { line-height: 1.07; letter-spacing: -.035em; }
h1 { font-size: clamp(3rem, 6vw, 6.2rem); max-width: 940px; }
h2 { font-size: clamp(2.3rem, 4.5vw, 4.6rem); max-width: 850px; }
h3 { font-size: clamp(1.35rem, 2vw, 2rem); }
p { max-width: 72ch; }
button, input, textarea { font: inherit; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(80px, 11vw, 150px) 0; position: relative; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--ink); color: var(--paper); }
.section-heading { margin-bottom: 58px; }
.section-heading.narrow { max-width: 880px; }
.section-heading > p:not(.eyebrow) { font-size: 1.12rem; color: var(--ink-soft); }
.section-dark .section-heading > p:not(.eyebrow) { color: rgba(255,255,255,.75); }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .75rem;
  font-weight: 800;
  margin-bottom: 24px;
}
.lead { font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.45; }
.sr-only { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }
.skip-link { position:fixed; left:10px; top:-80px; background:#fff; padding:10px 14px; z-index:9999; }
.skip-link:focus { top:10px; }

.site-header {
  position: fixed; inset: 0 0 auto;
  z-index: 1000;
  background: rgba(251,250,246,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: .3s ease;
}
.site-header.scrolled { border-color: var(--line); }
.nav-wrap { min-height: 82px; display:flex; align-items:center; justify-content:space-between; gap:30px; }
.brand { display:inline-flex; align-items:center; gap:11px; text-decoration:none; font-weight:800; line-height:.95; }
.brand-mark { width:34px; height:34px; border-radius: 50% 50% 10% 50%; background: var(--coral); transform: rotate(20deg); display:inline-block; }
.main-nav { display:flex; gap:22px; align-items:center; font-size:.86rem; font-weight:650; }
.main-nav a { text-decoration:none; }
.main-nav a:not(.nav-cta) { position:relative; }
.main-nav a:not(.nav-cta)::after { content:""; position:absolute; left:0; right:100%; bottom:-5px; height:2px; background:var(--coral); transition:.25s; }
.main-nav a:hover::after { right:0; }
.nav-cta { padding:12px 18px; background:var(--ink); color:#fff; border-radius:999px; }
.menu-toggle { display:none; background:none; border:0; padding:10px; }
.menu-toggle span:not(.sr-only) { display:block; width:25px; height:2px; background:var(--ink); margin:5px 0; }

.hero { min-height: 100vh; display:flex; align-items:center; padding-top:150px; }
.hero-grid { display:grid; grid-template-columns: 1.25fr .75fr; gap: clamp(40px, 7vw, 100px); align-items:center; }
.hero-copy { position:relative; z-index:2; }
.hero-copy p { font-size:1.1rem; }
.hero-actions { display:flex; flex-wrap:wrap; align-items:center; gap:25px; margin-top:38px; }
.button { display:inline-flex; justify-content:center; align-items:center; gap:14px; padding:16px 24px; border-radius:999px; text-decoration:none; font-weight:800; border:0; cursor:pointer; }
.button-primary { background:var(--coral); color:#fff; }
.button-primary:hover { background:var(--coral-dark); transform:translateY(-2px); }
.text-link { font-weight:800; text-decoration:none; border-bottom:1px solid currentColor; }
.portrait-card { min-height:600px; position:relative; }
.portrait-placeholder {
  height:100%; min-height:600px; border-radius: 180px 180px 28px 28px;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,.7), transparent 35%),
    linear-gradient(155deg, var(--lime), var(--mint) 45%, var(--violet));
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  color:rgba(23,35,31,.75); text-align:center; border:1px solid rgba(23,35,31,.1);
}
.portrait-placeholder.large { min-height:650px; border-radius:28px 180px 28px 180px; }
.portrait-placeholder span { font-size:1.2rem; font-weight:800; }
.portrait-note { position:absolute; left:-55px; bottom:45px; background:var(--white); padding:22px 28px; border-radius:18px; box-shadow:var(--shadow); display:flex; gap:15px; align-items:flex-start; }
.portrait-note p { margin:0; line-height:1.3; }
.mini-dot { width:12px; height:12px; border-radius:50%; background:var(--coral); margin-top:3px; }
.hero-orb { position:absolute; border-radius:50%; filter:blur(1px); opacity:.6; }
.orb-one { width:420px; height:420px; background:var(--lime); top:10%; left:-260px; }
.orb-two { width:160px; height:160px; background:var(--violet); bottom:5%; left:45%; }

.card-grid { display:grid; gap:22px; }
.four-cards { grid-template-columns:repeat(4,1fr); }
.situation-card, .testimonial-card {
  background:var(--paper); min-height:310px; padding:30px; border:1px solid var(--line); border-radius:var(--radius);
  display:flex; flex-direction:column;
}
.situation-card:nth-child(2), .testimonial-card:nth-child(3) { transform:translateY(30px); }
.card-number { display:inline-grid; place-items:center; width:44px; height:44px; border-radius:50%; background:var(--lime); font-weight:800; margin-bottom:auto; }
.situation-card h3 { margin-top:45px; }
.calm-note { margin-top:75px; padding:30px 35px; border-left:5px solid var(--coral); background:rgba(255,255,255,.55); border-radius:0 18px 18px 0; }

.split-grid { display:grid; grid-template-columns:1fr 1fr; gap:clamp(50px,8vw,120px); align-items:start; }
.flow-card { padding:40px; border-radius:var(--radius); background:var(--white); box-shadow:var(--shadow); display:grid; gap:9px; text-align:center; }
.flow-step { padding:15px; border:1px solid var(--line); border-radius:999px; font-weight:750; }
.flow-step.accent { background:var(--coral); color:#fff; border-color:transparent; }
.quote-block { margin:90px 0 40px; padding:clamp(35px,6vw,80px); background:var(--violet); border-radius:var(--radius); }
.quote-block p { font-size:clamp(1.65rem,3vw,3rem); line-height:1.25; max-width:1000px; }
.quote-block footer { font-weight:800; }
.quote-block.compact { max-width:850px; margin:0 0 60px auto; background:var(--lime); }
.statement { display:flex; justify-content:space-between; gap:30px; padding:28px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); font-size:1.2rem; }
.statement strong { font-size:1.45rem; }

.benefits { background:rgba(255,255,255,.07); border:1px solid rgba(255,255,255,.12); border-radius:var(--radius); padding:40px; }
.check-list { list-style:none; padding:0; margin:30px 0 0; }
.check-list li { position:relative; padding:18px 0 18px 42px; border-bottom:1px solid rgba(255,255,255,.15); }
.check-list li::before { content:"✓"; position:absolute; left:0; top:17px; color:var(--lime); font-weight:900; }
.highlight-line { font-size:1.3rem; color:var(--lime); font-weight:750; margin-top:35px; }

.timeline { border-top:1px solid var(--line); }
.timeline-item { display:grid; grid-template-columns:130px 1fr; gap:30px; padding:45px 0; border-bottom:1px solid var(--line); }
.timeline-item > span { font-size:3rem; font-weight:850; color:var(--coral); }
.timeline-item p { max-width:780px; }
.timeline-item small { font-weight:800; }
.closing-line { font-size:1.4rem; max-width:800px; margin:50px 0 0 auto; }

.results-grid { display:grid; grid-template-columns:repeat(6,1fr); gap:20px; }
.result-card { grid-column:span 2; min-height:290px; background:var(--paper); border-radius:var(--radius); padding:28px; border:1px solid var(--line); }
.result-card:nth-child(4), .result-card:nth-child(5) { grid-column:span 3; }
.result-card > span { font-size:.8rem; font-weight:800; color:var(--coral); }
.result-card h3 { margin-top:50px; }
.case-study { margin-top:30px; padding:40px; background:var(--ink); color:#fff; border-radius:var(--radius); display:grid; grid-template-columns:.65fr 1fr auto; gap:40px; align-items:center; }

.approach-grid { display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.approach-card { padding:38px; border-radius:var(--radius); border:1px solid var(--line); background:#fff; }
.approach-card:nth-child(2) { background:var(--lime); }
.approach-card:nth-child(3) { background:var(--mint); }
.approach-card:nth-child(4) { background:var(--violet); }
.tool-label { font-size:.75rem; text-transform:uppercase; letter-spacing:.12em; font-weight:900; }
.approach-card ul { padding-left:20px; }

.about-grid { display:grid; grid-template-columns:.75fr 1.25fr; gap:clamp(50px,8vw,120px); align-items:center; }
.about-copy h3 { margin-top:45px; }
.beliefs { margin-top:90px; padding:45px; border:1px solid rgba(255,255,255,.18); border-radius:var(--radius); }
.belief-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:35px; }
.belief-grid p { font-size:1.25rem; }
.values-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:30px; }
.value { padding:32px; background:rgba(255,255,255,.07); border-radius:var(--radius); }
.value span { color:var(--lime); font-weight:900; }

.testimonial-card { min-height:250px; }
.testimonial-card > span { font-size:4rem; color:var(--coral); line-height:.6; }
.testimonial-card h3 { margin-top:auto; }
.placeholder-note { margin-top:65px; color:var(--ink-soft); font-style:italic; }

.faq-grid { display:grid; grid-template-columns:.7fr 1.3fr; gap:80px; align-items:start; }
.accordion details { border-top:1px solid var(--line); padding:25px 0; }
.accordion details:last-child { border-bottom:1px solid var(--line); }
.accordion summary { cursor:pointer; list-style:none; font-weight:800; font-size:1.2rem; padding-right:40px; position:relative; }
.accordion summary::after { content:"+"; position:absolute; right:0; font-size:1.8rem; color:var(--coral); }
.accordion details[open] summary::after { content:"−"; }
.accordion p { margin:20px 0 0; }

.contact { background:var(--lime); }
.contact-grid { display:grid; grid-template-columns:.8fr 1.2fr; gap:80px; }
.contact-links { display:grid; gap:12px; margin-top:35px; }
.contact-links a { font-weight:800; }
.contact-form { padding:38px; background:var(--paper); border-radius:var(--radius); box-shadow:var(--shadow); }
.contact-form label { display:grid; gap:8px; font-weight:750; margin-bottom:18px; }
.field-row { display:grid; grid-template-columns:1fr 1fr; gap:18px; }
input, textarea { width:100%; background:#fff; border:1px solid var(--line); border-radius:12px; padding:14px 16px; outline:none; }
input:focus, textarea:focus { border-color:var(--coral); box-shadow:0 0 0 3px rgba(239,107,86,.15); }
.contact-form .button { margin:8px 0 15px; }

.site-footer { background:var(--ink); color:#fff; padding:70px 0; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:50px; }
.footer-grid > div { display:grid; align-content:start; gap:10px; }
.footer-grid a { text-decoration:none; color:rgba(255,255,255,.8); }
.footer-brand { color:#fff !important; margin-bottom:20px; }

.reveal { opacity:0; transform:translateY(24px); transition:opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity:1; transform:none; }

@media (max-width: 1020px) {
  .menu-toggle { display:block; z-index:3; }
  .main-nav { position:fixed; inset:0; background:var(--paper); padding:120px 30px 40px; flex-direction:column; align-items:flex-start; font-size:1.3rem; transform:translateX(100%); transition:.35s; }
  .main-nav.open { transform:none; }
  .hero-grid, .split-grid, .about-grid, .faq-grid, .contact-grid { grid-template-columns:1fr; }
  .portrait-card { max-width:620px; margin:auto; width:100%; }
  .four-cards { grid-template-columns:1fr 1fr; }
  .results-grid { grid-template-columns:1fr 1fr; }
  .result-card, .result-card:nth-child(4), .result-card:nth-child(5) { grid-column:span 1; }
  .case-study { grid-template-columns:1fr; }
  .belief-grid, .values-grid { grid-template-columns:1fr; }
}
@media (max-width: 680px) {
  :root { --container:min(100% - 28px, 1200px); }
  body { font-size:16px; }
  .section { padding:75px 0; }
  .hero { padding-top:115px; }
  .four-cards, .approach-grid, .results-grid, .field-row, .footer-grid { grid-template-columns:1fr; }
  .situation-card:nth-child(2), .testimonial-card:nth-child(3) { transform:none; }
  .portrait-card, .portrait-placeholder { min-height:470px; }
  .portrait-note { left:14px; bottom:20px; }
  .timeline-item { grid-template-columns:70px 1fr; gap:15px; }
  .timeline-item > span { font-size:2rem; }
  .statement { flex-direction:column; }
  .quote-block { margin-top:55px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation:none !important; transition:none !important; }
  .reveal { opacity:1; transform:none; }
}

.faq-link{display:inline-block;margin-top:14px;font-weight:800;text-decoration:none;border-bottom:1px solid currentColor;}