:root{color-scheme:dark;--bg:#071b1e;--surface:#0d292d;--surface-2:#12383c;--text:#eef7f3;--muted:#a9c2bd;--line:#285257;--accent:#9fe3c2;--accent-2:#ffd38a;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:radial-gradient(circle at 12% 0%,#12383c 0,#071b1e 34rem);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:18px;line-height:1.72}body:has(.article-body){background:var(--bg)}a{color:var(--accent);text-underline-offset:3px}a:hover{color:#fff}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:1rem;top:1rem;z-index:100;padding:.7rem 1rem;background:#fff;color:#000}.site-header{position:sticky;top:0;z-index:50;background:rgba(7,27,30,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.site-header__inner{max-width:var(--max);margin:auto;padding:15px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;flex-direction:column;color:#fff;text-decoration:none;line-height:1}.brand span{font-size:1.15rem;font-weight:800;letter-spacing:.18em}.brand small{margin-top:6px;color:var(--muted);font-size:.68rem;letter-spacing:.08em}.site-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.site-nav a{padding:8px 11px;color:var(--text);text-decoration:none;border-radius:8px}.site-nav a:hover{background:var(--surface-2)}.site-nav .nav-cta{background:var(--accent);color:#062020;font-weight:750}.nav-toggle{display:none;background:transparent;color:var(--text);border:1px solid var(--line);border-radius:8px;padding:9px 12px;font:inherit}main{min-height:65vh}.page{max-width:var(--max);margin:auto;padding:clamp(35px,6vw,78px) 24px 100px}.page>article,.article-body{max-width:820px;margin:auto}.page>article>h1,.article-body>h1{font-size:clamp(2.2rem,5vw,4.3rem);line-height:1.06;letter-spacing:-.035em;margin:0 0 18px}.article-body>h1:after{content:"";display:block;width:76px;height:4px;margin-top:22px;background:var(--accent);border-radius:4px}.meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:35px}.article-body p{max-width:72ch;margin:1.2em auto}.article-body>p:first-of-type:first-letter{float:left;font-family:Georgia,serif;font-size:4.4em;line-height:.8;padding:.08em .12em 0 0;color:var(--accent-2)}.article-body h2{margin:3.2rem 0 1rem;font-size:clamp(1.55rem,3vw,2.25rem);line-height:1.2;color:#fff}.article-body h3{margin:2.3rem 0 .7rem;font-size:clamp(1.2rem,2.5vw,1.6rem);color:var(--accent)}.article-body h4,.article-body h5,.article-body h6{font-size:1.2rem;color:var(--accent-2)}.article-body figure{margin:2.4rem auto;text-align:center}.article-body figure img,.article-body figure video{display:block;width:auto;max-width:100%;max-height:560px;margin:auto;object-fit:contain;border-radius:12px;box-shadow:0 12px 30px rgba(0,0,0,.28);cursor:zoom-in}.article-body figure figcaption{margin:.65rem auto 0;max-width:65ch;color:var(--muted);font-size:.88rem}.article-body blockquote{margin:2rem 0;padding:1rem 1.25rem;border-left:4px solid var(--accent);background:var(--surface);border-radius:0 10px 10px 0;color:#e4f1ed}.article-body details{margin:1.5rem 0;padding:1rem 1.2rem;background:var(--surface);border:1px solid var(--line);border-radius:10px}.article-body summary{cursor:pointer;color:var(--accent)}.article-body table{display:block;max-width:100%;overflow:auto;border-collapse:collapse}.article-body td,.article-body th{padding:1rem;border:1px solid var(--line)}.article-list{list-style:none;padding:0;margin:2rem 0}.article-list li{padding:1.05rem 0;border-bottom:1px solid var(--line)}.article-list a{font-size:1.1rem;color:var(--text)}.article-list small{color:var(--muted)}.hero{max-width:var(--max);margin:auto;padding:clamp(58px,9vw,112px) 24px 50px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}.hero h1{max-width:12ch;margin:0;font-size:clamp(3rem,7vw,6.7rem);line-height:.95;letter-spacing:-.06em}.hero h1 em{color:var(--accent);font-style:normal}.hero p{max-width:60ch;color:var(--muted);font-size:1.12rem}.hero-card{padding:26px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(145deg,rgba(18,56,60,.9),rgba(13,41,45,.55));box-shadow:0 22px 60px rgba(0,0,0,.25)}.hero-card img{max-width:100%;height:auto;max-height:330px;object-fit:contain;border-radius:12px}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.button{display:inline-block;padding:11px 16px;border-radius:9px;background:var(--accent);color:#062020;font-weight:750;text-decoration:none}.button.secondary{background:transparent;color:var(--accent);border:1px solid var(--line)}.section-intro{max-width:var(--max);margin:auto;padding:25px 24px 0}.section-intro h2{margin:0;font-size:1.6rem}.lightbox{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.9);display:grid;place-items:center;padding:30px;cursor:zoom-out}.lightbox img{max-width:95vw;max-height:90vh;border-radius:10px}.lightbox[hidden]{display:none}.site-footer{border-top:1px solid var(--line);background:#051417;color:var(--muted)}.site-footer__inner{max-width:var(--max);margin:auto;padding:40px 24px 26px;display:flex;justify-content:space-between;gap:35px}.site-footer__inner p{max-width:42ch;margin:.6rem 0}.site-footer nav{display:flex;gap:14px;flex-wrap:wrap;align-content:flex-start}.site-footer__bottom{max-width:var(--max);margin:auto;padding:14px 24px 24px;display:flex;justify-content:space-between;border-top:1px solid var(--line);font-size:.85rem}.scroll-tools{position:fixed;right:18px;bottom:18px;z-index:40;display:flex;flex-direction:column;gap:7px}.scroll-tools a{width:38px;height:38px;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--line);border-radius:50%;color:#fff;text-decoration:none;box-shadow:0 5px 18px rgba(0,0,0,.3)}.scroll-tools a:hover{background:var(--accent);color:#062020}@media(max-width:780px){body{font-size:16px}.site-header__inner{padding:13px 18px}.nav-toggle{display:block}.site-nav{display:none;width:100%;flex-direction:column;align-items:stretch;padding-top:10px}.site-nav.is-open{display:flex}.site-nav a{padding:11px 12px}.site-header__inner{flex-wrap:wrap}.hero{grid-template-columns:1fr;gap:24px;padding:52px 18px 30px}.hero h1{font-size:clamp(3rem,16vw,5.2rem)}.page{padding:35px 18px 75px}.article-body>h1{font-size:clamp(2.1rem,10vw,3.4rem)}.article-body figure img,.article-body figure video{max-height:390px}.site-footer__inner,.site-footer__bottom{padding-left:18px;padding-right:18px;flex-direction:column;gap:18px}.site-footer nav{flex-direction:column;gap:4px}.scroll-tools{right:10px;bottom:12px}.article-body>p:first-of-type:first-letter{font-size:3.7em}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.eyebrow{margin:0 0 14px;text-transform:uppercase;letter-spacing:.14em;color:var(--accent);font-size:.78rem;font-weight:800}.lead{max-width:65ch;color:var(--muted);font-size:1.15rem}.content-heading{font-size:clamp(1.5rem,3vw,2.3rem);color:var(--muted);margin-top:3rem}.home-page{min-height:70vh}

/* Espacement des blocs éditoriaux */
.article-body > :is(p,figure,blockquote,details,table,ul,ol){margin-top:2rem;margin-bottom:2rem}
.article-body > :is(h2,h3,h4,h5,h6){margin-top:3.4rem;margin-bottom:1.4rem}
.article-body > .meta{margin-top:0;margin-bottom:2.5rem}
.article-body > :is(figure,blockquote,details) + :is(figure,blockquote,details){margin-top:2.8rem}
@media(max-width:780px){.article-body > :is(p,figure,blockquote,details,table,ul,ol){margin-top:1.8rem;margin-bottom:1.8rem}}

/* Page SPHERA et archipel */
.sphera-page .lead{font-size:clamp(1.1rem,2vw,1.35rem);color:var(--text)}
.sphera-page section{margin-top:4rem}
.sphera-page section h2{font-size:clamp(1.55rem,3vw,2.2rem);line-height:1.2}
.sphera-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr));gap:1.4rem;margin-top:1.8rem}
.sphera-card{padding:1.5rem;background:var(--surface);border:1px solid var(--line);border-radius:14px}
.sphera-card h3{margin:0 0 .8rem;color:var(--accent)}
.sphera-card p{margin:0}
.archipel-links{list-style:none;margin:1.8rem 0 0;padding:0;display:grid;gap:1rem}
.archipel-links li{padding:1.25rem 1.5rem;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.archipel-links a{display:block;font-weight:700;font-size:1.08rem}
.archipel-links span{display:block;color:var(--muted);margin-top:.35rem}
.external-note{border-left:3px solid var(--accent-2);background:var(--surface);padding:1rem 1.25rem;margin:2rem 0;color:var(--muted)}
.sphera-signature{margin-top:3rem;color:var(--muted);font-size:.9rem}

/* Rythme régulier entre les blocs principaux (35 px, 30 px sur mobile). */
.article-body > * + *, .sphera-page article > * + *{margin-top:35px}
.article-body > :is(p,figure,blockquote,details,table,ul,ol,div,section,h2,h3,h4,h5,h6),
.sphera-page article > :is(p,div,section){margin-bottom:0}
.article-body > h2,.article-body > h3,.article-body > h4{margin-top:45px}
.article-body > .meta{margin-top:12px;margin-bottom:35px}
.sphera-grid{gap:35px}
.archipel-links{gap:35px}
@media(max-width:780px){.article-body > * + *, .sphera-page article > * + *{margin-top:30px}.sphera-grid,.archipel-links{gap:30px}}