:root{--ink:#12100d;--ink2:#1d1a15;--stone:#f5efe7;--stone2:#eae0cf;--brass:#c38f4b;--brass2:#a97836;--mut:#6f6455;--mutd:#b3a893;--line:rgba(18,16,13,.14);--lined:rgba(245,239,231,.16);--r:4px;--font:"Segoe UI",Inter,system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--stone);color:var(--ink);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit}
.wrap{width:min(1240px,92%);margin-inline:auto}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--stone);padding:.6rem 1rem;z-index:200}
.skip:focus{left:8px;top:8px}
.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.22em;font-size:.72rem;font-weight:700;color:var(--brass2)}
.dark .eyebrow{color:var(--brass)}
h1,h2,h3{line-height:1.12;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(1.9rem,4vw,3rem);margin:.6rem 0 1rem}
h3{font-size:1.25rem}
.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);max-width:62ch}
section{padding:clamp(4rem,9vw,7.5rem) 0}
.dark{background:var(--ink);color:var(--stone)}
.dark p{color:var(--mutd)}
/* Header */
header.site{position:fixed;top:0;left:0;right:0;z-index:90;background:linear-gradient(180deg,rgba(12,10,8,.42),rgba(12,10,8,.62)),url("assets/texture-logo.webp") center/auto 100%;border-bottom:1px solid rgba(195,143,75,.22);transition:background .35s,border-color .35s}
header.site.scrolled{background:linear-gradient(rgba(12,10,8,.86),rgba(12,10,8,.86)),url("assets/texture-logo.webp") center/auto 100%;border-bottom:1px solid rgba(195,143,75,.35)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none}
.brand img{width:52px;height:auto}
.brand{color:var(--stone)}
.brand b{font-size:1.02rem;letter-spacing:.3em;color:var(--stone)}
.brand small{display:block;letter-spacing:.54em;font-size:.64rem;color:var(--brass2);font-weight:700;margin-top:.18rem}
body:not(.xp) header.site{background:linear-gradient(rgba(12,10,8,.88),rgba(12,10,8,.88)),url("assets/texture-logo.webp") center/auto 100%;box-shadow:0 1px 0 rgba(195,143,75,.25)}
.brand .brand-logo{height:58px;width:auto;display:block;margin-top:-5px}
/* V12 — bouton d'en-tête sans remplissage + transitions de marque */
header.site .btn{background:transparent;color:var(--stone);border:1px solid rgba(245,239,231,.55)}
header.site .btn:hover{background:rgba(195,143,75,.12);border-color:var(--brass);color:#fff}
.mainnav a{position:relative}
.mainnav a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:100%;background:var(--brass);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.mainnav a:hover::after{transform:scaleX(1)}
.btn{position:relative;overflow:hidden}
.btn::before{content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-18deg);transition:left .5s ease}
.btn:hover::before{left:130%}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px}
#matiere,#services,#realisations,#parcours,#approche,#projet{box-shadow:inset 0 1px 0 rgba(195,143,75,.28)}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.menu{display:flex;gap:1.6rem;list-style:none;align-items:center}
.menu a{text-decoration:none;font-weight:600;font-size:.95rem;color:var(--stone)}
.menu a:hover{color:var(--brass2)}
.burger{display:none;background:none;border:1px solid rgba(245,239,231,.4);border-radius:var(--r);width:44px;height:44px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--stone);margin:4px auto}
.btn{display:inline-block;background:var(--brass);color:var(--ink);font-weight:700;text-decoration:none;padding:.85rem 1.5rem;border-radius:6px;border:1px solid var(--brass);transition:.2s}
.btn:hover{background:var(--brass2);border-color:var(--brass2);color:#fff}
.btn.ghost{background:transparent;color:var(--stone);border-color:var(--lined)}
.dark .btn.ghost:hover,.btn.ghost:hover{border-color:var(--brass);color:var(--brass)}
.btn.darkb{background:var(--ink);color:var(--stone);border-color:var(--ink)}
.btn.darkb:hover{background:var(--ink2)}
/* Splash */
#splash{position:fixed;inset:0;z-index:300;background:#12100d;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.4rem;color:var(--stone)}
#splash video{width:min(760px,88vw);height:auto;border:1px solid rgba(195,143,75,.25)}
#splash .sp-f{animation:rise .7s cubic-bezier(.2,.8,.2,1) both}
#splash .sp-t{animation:rise .7s .15s cubic-bezier(.2,.8,.2,1) both}
#splash .sp-diag{transform-origin:89px 112px;animation:diag .6s .55s cubic-bezier(.2,.8,.2,1) both}
#splash .sp-word{letter-spacing:.42em;font-weight:700;font-size:clamp(.85rem,3vw,1.15rem);text-transform:uppercase;opacity:0;animation:fade .6s .95s forwards}
#splash .sp-sub{letter-spacing:.3em;font-size:.65rem;text-transform:uppercase;color:var(--brass);opacity:0;animation:fade .6s 1.2s forwards}
#splash.hide{opacity:0;visibility:hidden;transition:opacity .45s,visibility .45s}
@keyframes rise{from{transform:translateY(26px);opacity:0}to{transform:translateY(0);opacity:1}}
@keyframes diag{from{transform:translate(-16px,10px) scaleY(.4);opacity:0}to{transform:none;opacity:1}}
@keyframes fade{to{opacity:1}}
#splash button{position:absolute;bottom:2rem;right:2rem;background:none;border:1px solid var(--lined);color:var(--stone);padding:.55rem 1.1rem;border-radius:var(--r);cursor:pointer;font:inherit;font-size:.85rem}
#splash button:hover{border-color:var(--brass);color:var(--brass)}
@media(prefers-reduced-motion:reduce){#splash{display:none}}
/* Hero */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;background:#0a0908;color:var(--stone);padding:0;overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-media img.kb{animation:kb 20s ease-in-out infinite alternate}
@keyframes kb{from{transform:scale(1)}to{transform:scale(1.09)}}
.hero .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,9,8,.55) 0%,rgba(10,9,8,.18) 26%,rgba(10,9,8,.42) 52%,rgba(10,9,8,.9) 82%,rgba(10,9,8,.97) 100%)}
.hero .wrap{position:relative;padding-top:8rem;padding-bottom:2.4rem}
.hero h1{font-size:clamp(2rem,4.6vw,3.4rem);max-width:16ch;margin:.7rem 0 .8rem}
.hero .lead{color:#e8ddcb;max-width:58ch}
.hero h1,.hero .lead,.hero .eyebrow{text-shadow:0 2px 18px rgba(0,0,0,.85),0 1px 3px rgba(0,0,0,.9)}
.hero .meta{margin-top:1.9rem;display:flex;gap:2.2rem;flex-wrap:wrap;border-top:1px solid var(--lined);padding-top:1.1rem;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mutd)}
.hero .meta b{color:var(--stone)}
@media (max-aspect-ratio:4/5){.hero .wrap{padding-top:7rem}}
/* Services */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.2rem;margin-top:2.6rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:1.8rem;position:relative}
.card::before{content:"";position:absolute;top:0;left:0;width:44px;height:4px;background:var(--brass)}
.card h3{margin:.5rem 0 .6rem}
.card p{color:var(--mut)}
.card .num{font-size:.75rem;letter-spacing:.25em;color:var(--brass2);font-weight:700}
.card a{font-weight:700;color:var(--brass2);text-decoration:none}
.card a:hover{text-decoration:underline}
/* Gallery */
.gal{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem;margin-top:2.6rem}
.gal figure{background:var(--ink2);border:1px solid var(--lined);border-radius:var(--r);overflow:hidden}
.gal img{width:100%;height:300px;object-fit:cover}
.gal figcaption{padding:.9rem 1rem}
.gal .lab{font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;color:var(--brass);font-weight:700}
.gal .ttl{font-weight:700;margin-top:.2rem}
.gal .dsc{font-size:.9rem}
/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.2rem;margin-top:2.6rem;counter-reset:st}
.step{border-top:3px solid var(--brass);padding-top:1.1rem}
.step .n{font-size:2rem;font-weight:800;color:var(--stone2);-webkit-text-stroke:1px var(--brass2)}
.step h3{margin:.4rem 0 .5rem}
.step p{color:var(--mut)}
/* Approach trio */
.trio{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;margin-top:2.4rem}
.trio div{border:1px solid var(--lined);border-radius:var(--r);padding:1.5rem}
.trio h3{color:var(--brass);text-transform:uppercase;letter-spacing:.18em;font-size:.85rem;margin-bottom:.6rem}
/* Zone + CTA */
.zone-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:2.5rem;align-items:start}
.zone-facts{list-style:none;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.zone-facts li{padding:1rem 1.3rem;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:1rem}
.zone-facts li:last-child{border-bottom:0}
.zone-facts b{white-space:nowrap}
.ctaband{background:var(--ink);color:var(--stone);border-radius:var(--r);padding:clamp(2rem,5vw,3.5rem);display:flex;justify-content:space-between;gap:2rem;align-items:center;flex-wrap:wrap}
.ctaband p{color:var(--mutd);max-width:52ch}
/* Page hero (inner pages) */
.pagehero{background:linear-gradient(rgba(18,16,13,.68),rgba(18,16,13,.84)),url("assets/bg-soumission.webp") center/cover no-repeat,var(--ink);color:var(--stone);padding:calc(clamp(3.5rem,8vw,6rem) + 4.2rem) 0 clamp(3.5rem,8vw,6rem)}
.formsec{background:url("assets/texture-bois.webp") center/cover,var(--stone)}
.darkband{background:linear-gradient(rgba(18,16,13,.78),rgba(18,16,13,.88)),url("assets/bg-soumission.webp") center/cover no-repeat,var(--ink);color:var(--stone)}
.darkband h2{color:#fff}
.darkband .lead{color:#e8e1d4}
.pagehero h1{font-size:clamp(2.1rem,5vw,3.4rem);margin:.7rem 0 1rem;max-width:20ch}
.pagehero p{color:#ddd3c2;max-width:60ch}
.crumb{font-size:.85rem;color:var(--mutd)}
.crumb a{color:var(--brass);text-decoration:none}
/* Prose + FAQ */
.prose h2{font-size:1.7rem;margin:2.2rem 0 .8rem}
.prose h2:first-child{margin-top:0}
.prose p{margin-bottom:1rem;color:#3d362c}
.prose ul{margin:0 0 1rem 1.2rem}
.prose li{margin-bottom:.45rem}
.check{list-style:none;margin-left:0}
.check li{padding-left:1.6rem;position:relative}
.check li::before{content:"";position:absolute;left:0;top:.45em;width:.7rem;height:.4rem;border-left:3px solid var(--brass);border-bottom:3px solid var(--brass);transform:rotate(-45deg)}
.split{display:grid;grid-template-columns:1.5fr .9fr;gap:2.5rem;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;position:sticky;top:96px}
.panel h3{margin-bottom:.6rem}
details{border:1px solid var(--line);border-radius:var(--r);background:#fff;margin-bottom:.7rem}
summary{cursor:pointer;font-weight:700;padding:1rem 1.2rem}
details p{padding:0 1.2rem 1.1rem;color:var(--mut)}
.pills{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}
.pill{border:1px solid var(--line);border-radius:99px;padding:.3rem .8rem;font-size:.82rem;background:#fff}
/* Form */
form.card-form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:clamp(1.4rem,3vw,2.2rem)}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
.field{display:flex;flex-direction:column;gap:.35rem}
.field.full{grid-column:1/-1}
label{font-weight:600;font-size:.95rem}
.req{color:var(--brass2)}
input,select,textarea{font:inherit;padding:.7rem .9rem;border:1px solid var(--line);border-radius:8px;background:var(--stone);width:100%}
::selection{background:var(--brass);color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--brass);outline:2px solid rgba(195,143,75,.4);outline-offset:1px}
textarea{min-height:130px;resize:vertical}
input:focus,select,textarea:focus{outline:2px solid var(--brass);outline-offset:1px}
.hp{position:absolute;left:-9999px;opacity:0}
.hint{font-size:.85rem;color:var(--mut)}
form .btn{margin-top:1.3rem;width:100%;text-align:center;cursor:pointer;font-size:1rem}
/* Footer */
footer{background:linear-gradient(rgba(13,11,9,.9),rgba(13,11,9,.94)),url("assets/texture-logo.webp") center/auto 100%,var(--ink);color:var(--stone);padding:4rem 0 2rem}
.fgrid2{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem}
footer h4{text-transform:uppercase;letter-spacing:.2em;font-size:.75rem;color:var(--brass);margin-bottom:1rem}
footer ul{list-style:none}
footer li{margin-bottom:.55rem}
footer a{text-decoration:none;color:#ddd3c2}
footer a:hover{color:var(--brass)}
footer p{color:var(--mutd)}
.fbot{border-top:1px solid var(--lined);margin-top:2.5rem;padding-top:1.4rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.88rem;color:var(--mutd)}
.center{text-align:center}
.big404{font-size:clamp(4rem,14vw,9rem);font-weight:800;color:var(--brass);line-height:1}
@media(max-width:1100px){
.menu{display:none;position:absolute;top:100%;left:0;right:0;background:#14110d;flex-direction:column;align-items:flex-start;padding:1.2rem 4%;border-bottom:1px solid var(--line)}
.menu.open{display:flex}
header.site .wrap{position:relative}
.burger{display:block}
.zone-grid,.split{grid-template-columns:1fr}
.panel{position:static}
.fgrid2{grid-template-columns:1fr 1fr}
.fgrid{grid-template-columns:1fr}
.gal img{height:250px}
}

section[id]{scroll-margin-top:84px}
.rv{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}.hero video{display:none}}
.cta-row{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.6rem}
.brand b{white-space:nowrap}
.menu .btn{white-space:nowrap}

@media (prefers-reduced-motion:reduce){.hero-media img.kb{animation:none}}