:root{
  --bg:#0f0d0c;
  --text:#f7f3f0;
  --muted:#e8ddd6;
  --brand:#e67e22; /* orange chaud */
  --brand-2:#d35400; /* plus profond */
  --card:#1a1614;
  --success:#2ecc71;
  --warning:#e67e22;
  --accent:#f1c40f;
  --b: #c6a27a;
  --m: #e67e22;
  --r: #5dade2;
  --d: #f4d03f;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.6}
body.nav-open{overflow:hidden}
h1,h2,h3{font-family:"Playfair Display",serif;line-height:1.2;margin:0 0 .5rem}
h1{font-size:clamp(2rem,4vw,3.2rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:clamp(1.2rem,2.2vw,1.5rem)}
p{margin:.25rem 0 .9rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.0))}
.section.highlight{background:linear-gradient(90deg, rgba(230,126,34,0.15), rgba(241,196,15,0.10)); border-top:1px solid rgba(255,255,255,.06); border-bottom:1px solid rgba(255,255,255,.06)}
.section-title{margin-bottom:12px}
.intro{max-width:70ch;color:var(--muted)}
.intro.strong{font-weight:600;color:var(--text)}
.lead{font-size:1.15rem;color:var(--muted)}

.site-header{position:sticky;top:0;background:rgba(15,13,12,.7);backdrop-filter: blur(10px);border-bottom:1px solid rgba(255,255,255,.06);z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:62px;position:relative}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:36px;height:36px;opacity:.9}
.brand-title{font-weight:700}
.brand-sub{font-size:.85rem;color:var(--muted)}

.nav{display:flex;align-items:center;gap:16px}
.nav a{color:var(--muted);font-weight:500}
.nav a:hover{color:var(--text)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:42px;height:42px;border-radius:50%;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.05);padding:10px;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:100%;height:2px;background:var(--muted);transition:transform .2s ease, opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.hero{padding:72px 0 40px;background:radial-gradient(1200px 500px at 20% -10%, rgba(230,126,34,.25), transparent), radial-gradient(800px 400px at 80% 10%, rgba(241,196,15,.20), transparent)}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center}
.hero-art{text-align:center}
.spirale-hero{max-width:320px;opacity:.95;filter: drop-shadow(0 6px 24px rgba(230,126,34,.25))}

.cta-row{display:flex;gap:12px;margin-top:10px}
.btn{display:inline-block;padding:10px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.18);font-weight:600}
.btn-primary{background:linear-gradient(180deg,var(--brand),var(--brand-2));color:black;border:none}
.btn-primary:hover{filter:brightness(1.05);text-decoration:none}
.btn-ghost{color:var(--muted);background:rgba(255,255,255,.06)}
.btn-ghost:hover{color:var(--text);text-decoration:none}

.grid{display:grid;gap:16px}
.grid.poles{grid-template-columns:repeat(4,1fr)}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:18px;padding:16px}
.schema-card{text-align:center}
.schema-card img{width:100%;max-width:340px;margin:0 auto 12px;border-radius:14px;display:block}
.schema-caption{color:var(--muted);font-size:.95rem;margin:0 auto;max-width:36ch}
.schema-logo{margin-top:24px;display:flex;justify-content:center;align-items:center;gap:8px;color:var(--muted);font-size:.85rem}
.schema-logo img{width:28px;height:28px;opacity:.8}
.card.pole h3{margin-bottom:4px}
.card.pole.b{border-left:4px solid var(--b)}
.card.pole.m{border-left:4px solid var(--m)}
.card.pole.r{border-left:4px solid var(--r)}
.card.pole.d{border-left:4px solid var(--d)}

.quote{margin:24px 0 0;padding:16px 18px;border-left:4px solid var(--brand);background:rgba(255,255,255,.04);border-radius:8px}

.sig-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:center}
.sig-text{display:flex;flex-direction:column;gap:12px;max-width:48ch;margin:0 auto;text-align:left;font-size:clamp(.95rem,2.4vw,1.05rem);line-height:1.6}
.sig-text p{margin:0}
.sig-text p strong{display:block;margin-bottom:4px;font-size:clamp(1rem,2.6vw,1.15rem)}
.sig-text .btn{align-self:flex-start}
.sig-art{display:flex;justify-content:center}
.sig-art img{width:100%;max-width:260px;height:auto;display:block}

.site-footer{padding:28px 0;border-top:1px solid rgba(255,255,255,.06);color:var(--muted)}
.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (max-width: 880px){
  .hero-inner{grid-template-columns:1fr}
  .grid.poles{grid-template-columns:1fr 1fr}
  .grid.two{grid-template-columns:1fr}
  .sig-grid{grid-template-columns:1fr}
  .sig-text{align-items:flex-start;max-width:100%;padding:0 12px;font-size:.95rem}
  .sig-text p strong{font-size:1rem}
  .sig-text .btn{width:100%;max-width:280px;text-align:center;margin-top:8px}
  .sig-art{margin-top:16px}
  .sig-art img{max-width:200px}
  .schema-logo{flex-direction:column;font-size:.8rem;text-align:center}
  .schema-logo img{width:36px;height:36px}
  .nav-toggle{display:flex}
  .nav{position:absolute;top:calc(100% + 12px);right:20px;background:var(--card);flex-direction:column;gap:12px;padding:16px;border:1px solid rgba(255,255,255,.12);border-radius:16px;box-shadow:0 12px 28px rgba(0,0,0,.4);opacity:0;pointer-events:none;transform:translateY(-10px);transition:opacity .2s ease, transform .2s ease}
  .nav a{margin:0;display:block}
  .nav.is-open{opacity:1;pointer-events:auto;transform:translateY(0)}
}