:root{--ink:#141414;--muted:#6b6b6b;--line:#e4e2de;--paper:#fafaf8;--accent:#b8875a;--max:1200px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Jost",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
.eyebrow{font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}
h1,h2,h3{font-weight:400;letter-spacing:-.01em;line-height:1.15}
h1{font-size:clamp(2.3rem,5vw,4rem)}
h2{font-size:clamp(1.8rem,3.4vw,2.6rem)}
h3{font-size:1.25rem;font-weight:500}
p+p{margin-top:1em}
.btn{display:inline-block;padding:14px 28px;border:1px solid var(--ink);text-decoration:none;font-size:.85rem;letter-spacing:.16em;text-transform:uppercase;transition:.2s}
.btn:hover{background:var(--ink);color:#fff}
.btn.light{border-color:#fff;color:#fff}.btn.light:hover{background:#fff;color:var(--ink)}
.link{text-decoration:none;border-bottom:1px solid var(--accent);padding-bottom:2px;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase}
/* header */
.site-header{position:sticky;top:0;z-index:10;background:rgba(250,250,248,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand img{height:38px;width:auto}
.brand span{display:flex;flex-direction:column;line-height:1.15}
.brand strong{font-weight:500;letter-spacing:.06em;text-transform:uppercase;font-size:.95rem}
.brand small{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.nav{display:flex;gap:34px}
.nav a{text-decoration:none;font-size:.82rem;letter-spacing:.16em;text-transform:uppercase;padding:6px 0;border-bottom:1px solid transparent}
.nav a:hover,.nav a[aria-current]{border-color:var(--ink)}
/* hero */
.hero{position:relative;height:calc(100vh - 76px);min-height:520px;max-height:860px;color:#fff;overflow:hidden}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05) 30%,rgba(0,0,0,.6))}
.hero .wrap{position:relative;z-index:1;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding-bottom:72px}
.hero .eyebrow{color:rgba(255,255,255,.8);margin-bottom:18px}
.hero h1{max-width:820px;margin-bottom:28px}
section{padding:110px 0}
.intro{display:grid;grid-template-columns:1fr 1.3fr;gap:80px;align-items:start}
.intro p{color:#333;font-size:1.08rem}
.intro h2{margin-top:14px}
.head-row{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:48px}
.head-row h2{margin-top:10px}
/* project grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:48px 32px}
.card{text-decoration:none;display:block}
.card .ph{overflow:hidden;aspect-ratio:4/5;background:#ddd}
.card img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.card:hover img{transform:scale(1.04)}
.card .meta{padding-top:16px}
.card .meta .eyebrow{font-size:.7rem}
.card h3{margin-top:6px}
.dark{background:var(--ink);color:#fff}
.dark .eyebrow{color:rgba(255,255,255,.6)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:56px;border-top:1px solid rgba(255,255,255,.2)}
.steps div{padding:32px 28px 0 0}
.steps b{display:block;font-weight:400;font-size:2.4rem;color:var(--accent);margin-bottom:14px}
.steps p{color:rgba(255,255,255,.75);font-size:.98rem}
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split img{width:100%;aspect-ratio:4/5;object-fit:cover}
.cta{text-align:center}
.cta h2{max-width:720px;margin:12px auto 32px}
/* page heading */
.page-head{padding:90px 0 50px}
.page-head p{max-width:640px;margin-top:22px;color:#444;font-size:1.08rem}
/* project detail */
.project-hero{width:100%;max-height:82vh;object-fit:cover;aspect-ratio:16/10}
.project-body{display:grid;grid-template-columns:1fr 2fr;gap:80px;padding:80px 0}
.facts{border-top:1px solid var(--line)}
.facts div{padding:14px 0;border-bottom:1px solid var(--line)}
.facts dt{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.facts dd{margin-top:2px}
.project-text p{font-size:1.1rem;color:#2a2a2a}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;padding-bottom:100px}
.gallery img{width:100%;aspect-ratio:4/5;object-fit:cover}
.pager{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:40px 0 100px}
/* approach */
.phase{display:grid;grid-template-columns:120px 1fr 1.4fr;gap:40px;padding:44px 0;border-top:1px solid var(--line)}
.phase b{font-weight:400;font-size:2.6rem;color:var(--accent);line-height:1}
.phase h3{font-size:1.5rem;font-weight:400}
.phase p{color:#333}
/* contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:72px;padding-bottom:110px}
.contact dl div{padding:22px 0;border-top:1px solid var(--line)}
.contact dt{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.contact dd{font-size:1.2rem}
.contact dd a{text-decoration:none;border-bottom:1px solid var(--accent)}
.contact iframe{width:100%;height:100%;min-height:420px;border:0;filter:grayscale(1)}
/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.75);padding:70px 0 40px;font-size:.95rem}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.site-footer img{height:44px;width:auto;margin-bottom:18px}
.site-footer h4{font-weight:400;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:#fff;margin-bottom:14px}
.site-footer a{text-decoration:none}.site-footer a:hover{color:#fff}
.site-footer .legal{margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.15);font-size:.8rem;color:rgba(255,255,255,.5)}
@media (max-width:900px){
 .intro,.split,.project-body,.contact{grid-template-columns:1fr;gap:40px}
 .grid{grid-template-columns:repeat(2,1fr);gap:36px 18px}
 .steps{grid-template-columns:repeat(2,1fr)}
 .phase{grid-template-columns:1fr;gap:12px}
 .site-footer .cols{grid-template-columns:1fr}
 section{padding:72px 0}
}
@media (max-width:640px){
 .wrap{padding:0 20px}
 .nav{gap:18px}.nav a{font-size:.72rem;letter-spacing:.1em}
 .brand small{display:none}.brand strong{font-size:.8rem}
 .grid,.gallery{grid-template-columns:1fr}
 .steps{grid-template-columns:1fr}
 .head-row{flex-direction:column;align-items:start}
}

/* project filters */
.filters{display:flex;flex-wrap:wrap;gap:8px 28px;margin:0 0 40px;border-bottom:1px solid var(--line)}
.filters button{background:none;border:0;padding:0 0 12px;margin-bottom:-1px;font:inherit;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:inherit;opacity:.55;cursor:pointer;border-bottom:2px solid transparent}
.filters button:hover{opacity:1}
.filters button.on{opacity:1;border-bottom-color:var(--accent)}
.card[hidden]{display:none}

/* En-tête d'accueil sobre */
.hero-plain{padding:0;border-bottom:1px solid var(--line);background:var(--paper)}
.hero-plain .wrap{min-height:min(calc(100vh - 76px),760px);display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center;padding-top:80px;padding-bottom:80px}
.hero-plain h1{max-width:680px;margin-bottom:36px}
.hero-plain .eyebrow{margin-bottom:22px}
.hp-draw{width:100%;height:auto}
.hp-draw .g,.hp-draw .d{stroke-dasharray:1;stroke-dashoffset:1;animation:hpdraw 1.2s ease forwards}
.hp-draw .d{animation-delay:1.6s}
.hp-draw .v{opacity:0;animation:hpfade .5s ease forwards}
.hp-draw .v:nth-of-type(-n+3){animation-delay:.3s}
.hp-draw .v:nth-of-type(n+4){animation-delay:.6s}
.hp-draw .v:nth-of-type(n+8){animation-delay:.9s}
.hp-draw .v:nth-of-type(n+9){animation-delay:1.2s}
.hp-draw .m{opacity:0;animation:hpfade .6s ease 1.5s forwards}
@keyframes hpdraw{to{stroke-dashoffset:0}}
@keyframes hpfade{to{opacity:1}}
@media (prefers-reduced-motion:reduce){.hp-draw *{animation:none!important;stroke-dashoffset:0!important;opacity:1!important}}
@media (max-width:860px){.hero-plain .wrap{grid-template-columns:1fr;gap:40px;min-height:0;padding-top:56px;padding-bottom:56px}.hp-draw{max-width:360px}}

/* Étapes condensées (Approche) */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--ink)}
.steps li{padding:28px 28px 8px 0;margin-right:28px;display:flex;flex-direction:column}
.steps li+li{border-left:1px solid var(--line);padding-left:28px;margin-right:0}
.steps b{font-weight:400;color:var(--accent);font-size:.95rem;letter-spacing:.08em}
.steps h3{margin:14px 0 12px;font-size:1.25rem}
.steps p{color:#444;font-size:.98rem;flex:1}
.steps small{display:block;margin-top:18px;color:var(--muted);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase}
@media (max-width:960px){.steps{grid-template-columns:1fr 1fr}.steps li:nth-child(3){border-left:0;padding-left:0}.steps li{border-bottom:1px solid var(--line)}}
@media (max-width:600px){.steps{grid-template-columns:1fr}.steps li,.steps li+li{border-left:0;padding-left:0;margin-right:0}}

/* Mention Ordre des architectes */
.site-footer .oa{display:inline-flex;align-items:center;gap:16px;margin-top:48px;color:inherit;text-decoration:none;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;line-height:1.5;opacity:.9}
.site-footer .oa:hover{opacity:1}
.oa-mark{height:30px;width:auto;flex:none}
.site-footer .oa+.legal{margin-top:32px}

/* carte au clic */
.map-consent{min-height:420px;background:#efede8;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center;padding:32px}
.map-consent p{font-size:1.1rem}
.map-consent small{font-size:.8rem;color:var(--muted);max-width:340px;line-height:1.6}
.map-consent small a{color:inherit}
/* mention images de synthèse */
.cg-note{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);text-align:right;margin-top:10px}
/* pied de page : liens légaux */
.site-footer .legal a{margin-left:4px}
.site-footer .legal a:hover{color:#fff}
/* mentions légales */
.legal-page{max-width:820px;padding-bottom:110px}
.legal-page section{padding:36px 0;border-top:1px solid var(--line)}
.legal-page h2{font-size:1.5rem;margin-bottom:18px}
.legal-page p,.legal-page li{color:#444;margin-bottom:10px}
.legal-page ul{padding-left:20px}
.legal-page dl div{display:grid;grid-template-columns:220px 1fr;gap:16px;padding:8px 0}
.legal-page dt{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);padding-top:4px}
.legal-page a{border-bottom:1px solid var(--accent);text-decoration:none}
.legal-page .todo{background:#f6e7d6;color:#8a5a2b;padding:0 6px}
@media (max-width:700px){.legal-page dl div{grid-template-columns:1fr;gap:2px}}