/* Layout centralisé */
body::before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 88% 8%,rgba(167,21,40,.10),transparent 28%),linear-gradient(135deg,#fff 0%,var(--canvas) 52%,#f4eaec 100%)}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.22;background-image:radial-gradient(circle,var(--brand-300) 1px,transparent 1.2px);background-size:30px 30px;mask-image:linear-gradient(90deg,transparent 25%,#000)}
.site-header{position:sticky;top:0;z-index:1000;height:var(--header-h);background:linear-gradient(105deg,var(--brand-950),var(--brand-700));color:#fff;box-shadow:0 4px 18px rgba(41,7,15,.22)}.site-header-inner{height:100%;display:flex;align-items:center;gap:22px;max-width:1600px;margin:auto;padding:0 24px}.brand{display:flex;align-items:center;gap:12px;min-width:240px;color:#fff;text-decoration:none}.brand-logo{width:58px;height:44px;display:grid;place-items:center;background:#fff;border-radius:10px;overflow:hidden}.brand-logo img{display:none;width:50px;height:36px;object-fit:contain}.brand-fallback{color:var(--brand-700);font-weight:900;font-size:.48rem;letter-spacing:.015em}.brand-copy strong{display:block;font-size:1.18rem;letter-spacing:.08em}.brand-copy small{display:block;color:rgba(255,255,255,.74);font-size:.7rem}.top-nav{display:flex;align-items:center;gap:4px;overflow:auto;flex:1;height:100%;scrollbar-width:none}.top-nav::-webkit-scrollbar{display:none}.top-nav a{height:44px;display:flex;align-items:center;padding:0 12px;border-radius:10px;color:#fff;text-decoration:none;font-weight:700;white-space:nowrap;font-size:.9rem}.top-nav a:hover,.top-nav a.is-active{background:#fff;color:var(--brand-800)}.header-tools{display:flex;gap:8px}.header-tools a,.menu-toggle{height:42px;display:grid;place-items:center;padding:0 12px;border:1px solid rgba(255,255,255,.26);border-radius:10px;background:transparent;color:#fff;text-decoration:none;font-weight:700}.menu-toggle{display:none;cursor:pointer}
#site-shell{max-width:1600px;margin:auto;display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:calc(100vh - var(--header-h))}.site-sidebar{position:sticky;top:var(--header-h);align-self:start;height:calc(100vh - var(--header-h));overflow:auto;padding:28px 18px 42px;border-right:1px solid var(--line);background:rgba(255,255,255,.88);backdrop-filter:blur(18px)}.side-home{display:block;margin-bottom:20px;padding:16px;border-radius:14px;background:linear-gradient(135deg,var(--brand-900),var(--brand-600));color:#fff;text-decoration:none}.side-home small{display:block;color:rgba(255,255,255,.72)}.side-group{margin:22px 0}.side-group>span{display:block;margin:0 10px 8px;color:var(--ink-400);font-size:.7rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.side-group a{display:block;margin:3px 0;padding:10px 12px;border-radius:9px;color:var(--ink-800);text-decoration:none;font-size:.88rem;font-weight:650}.side-group a:hover,.side-group a.is-active{background:var(--brand-100);color:var(--brand-900)}.side-group a.is-active{box-shadow:inset 4px 0 var(--brand-600)}
.page-content{min-width:0;padding:36px clamp(22px,4vw,64px) 84px}.page-hero{position:relative;min-height:280px;display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,42%);gap:40px;align-items:center;max-width:var(--content-max);margin:0 auto 40px;padding:clamp(30px,5vw,64px);border-radius:var(--r-lg);overflow:hidden;background:linear-gradient(130deg,var(--brand-950),var(--brand-700) 62%,var(--brand-500));color:#fff;box-shadow:var(--shadow-lg)}.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 82% 30%,rgba(255,255,255,.18),transparent 28%),repeating-linear-gradient(125deg,transparent 0 36px,rgba(255,255,255,.025) 36px 38px)}.page-hero-copy,.page-hero-art{position:relative;z-index:1}.page-hero .eyebrow{color:#fff}.page-hero h1{margin:8px 0 14px;font-size:clamp(2.4rem,5.5vw,5rem);letter-spacing:-.035em}.page-hero p{max-width:760px;margin:0;color:rgba(255,255,255,.88);font-size:clamp(1.05rem,2vw,1.35rem)}.page-hero-art{margin:0}.page-hero-art img{width:100%;max-height:270px;object-fit:contain;filter:drop-shadow(0 18px 28px rgba(0,0,0,.28))}.content-flow{max-width:var(--content-max);margin:auto}.content-flow> :first-child{margin-top:0}
.site-footer{padding:32px 24px;border-top:1px solid var(--line);background:var(--brand-950);color:rgba(255,255,255,.76)}.site-footer-inner{max-width:1500px;margin:auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.site-footer strong{color:#fff}.back-to-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border:0;border-radius:50%;background:var(--brand-700);color:#fff;box-shadow:var(--shadow-md);cursor:pointer;opacity:0;transform:translateY(12px);transition:.2s}.back-to-top.is-visible{opacity:1;transform:none}
body[data-layout="landing"] #site-shell{grid-template-columns:1fr}body[data-layout="landing"] #site-sidebar{display:none}body[data-layout="landing"] .page-content{padding-top:42px}body[data-layout="presentation"] .site-sidebar{display:none}body[data-layout="presentation"] #site-shell{grid-template-columns:1fr}
@media(max-width:1120px){.brand-copy small{display:none}.brand{min-width:150px}.top-nav a{padding-inline:9px;font-size:.82rem}}
@media(max-width:900px){.menu-toggle{display:grid}.top-nav{display:none}.header-tools{margin-left:auto}#site-shell{grid-template-columns:1fr}.site-sidebar{position:fixed;z-index:900;left:0;top:var(--header-h);width:min(88vw,340px);transform:translateX(-105%);transition:.25s;box-shadow:var(--shadow-lg)}body.nav-open .site-sidebar{transform:none}.page-content{padding-inline:16px}.page-hero{grid-template-columns:1fr;min-height:auto;padding:34px 24px}.page-hero-art{display:none}.brand{min-width:0}.brand-copy small{display:none}.header-tools a{display:none}}