:root{color-scheme:dark;--bg:#231f20;--text:#f4f1ed;--muted:#bdb5b1;--red:#ef292e}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;color:var(--text);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 77% 44%,#6b554017,transparent 53%)}
.page{position:relative;max-width:1600px;min-height:100svh;margin:0 auto;padding:40px 6.1% 0;display:flex;flex-direction:column}
.header{display:flex;align-items:center;justify-content:space-between;min-height:65px;gap:22px}
.brand{position:relative;width:205px;height:60px;overflow:hidden;flex-shrink:0}
.brand img{position:absolute;width:214px;height:auto;max-width:none;left:-5px;top:-75px}
.status{display:flex;align-items:center;gap:11px;font-size:11px;letter-spacing:.12em;color:#cec6c0;text-transform:uppercase;white-space:nowrap}
.status span{width:6px;height:6px;background:var(--red);border-radius:50%;box-shadow:0 0 0 5px #ef292e0c}
.hero{flex:1;display:grid;grid-template-columns:1fr 1.13fr;align-items:center;gap:0;min-height:640px;padding:56px 0 60px}
.intro{z-index:1;padding-bottom:10px}
.eyebrow{margin:0 0 29px;font-size:11px;font-weight:400;text-transform:uppercase;letter-spacing:.23em;display:flex;align-items:center;gap:13px;color:#ccc2ba}
.eyebrow span{width:24px;height:1px;background:#8c7e75}
h1{font-size:clamp(54px,6.25vw,93px);font-weight:400;line-height:1.04;letter-spacing:-.059em;margin:0;white-space:nowrap}
h1 span{color:#ded7d1}
.red-rule{height:3px;width:41px;background:var(--red);margin:31px 0 27px}
.lead{font-size:22px;line-height:1.42;letter-spacing:-.025em;margin:0 0 16px}
.description{max-width:375px;font-size:14px;line-height:1.9;color:var(--muted);margin:0}
.soon{font-size:12px;line-height:1.7;color:#a89e98;margin:25px 0 0}
.architecture{position:relative;align-self:stretch;margin:0 -35px 0 -25px;display:flex;align-items:center;justify-content:center;min-width:0}
.drawing-grid{position:absolute;inset:14% 0 8%;opacity:.25;background-image:linear-gradient(#a99c8f13 1px,transparent 1px),linear-gradient(90deg,#a99c8f13 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse,#000 15%,transparent 72%)}
.building{display:block;position:relative;width:100%;max-height:700px;overflow:visible}
.drawing-label{position:absolute;font-size:8px;letter-spacing:.23em;color:#968a81}
.top-label{top:8%;right:12%}
figcaption{position:absolute;bottom:5.5%;right:13%;display:flex;gap:11px;align-items:center;font-size:11px;letter-spacing:.04em;color:#aaa097}
.caption-mark{width:13px;height:13px;border:1px solid #8d7f75;display:inline-block;position:relative}
.caption-mark::after{content:"";position:absolute;width:5px;height:5px;background:var(--red);top:3px;left:3px}
.footer{border-top:1px solid #ffffff20;min-height:95px;display:flex;justify-content:space-between;align-items:center;gap:24px}
.steps{display:flex;list-style:none;margin:0;padding:0;gap:36px}
.steps li{font-size:11px;letter-spacing:.05em;color:#d0c7bf;display:flex;align-items:center;gap:12px}
.steps li span{font-size:9px;letter-spacing:.06em;color:#a08f85}
.domain{margin:0;font-size:12px;letter-spacing:.035em;color:#d0c7bf;white-space:nowrap}
.domain span{margin-left:13px;color:var(--red);font-size:16px}
@media(min-width:1600px){.page{padding-left:98px;padding-right:98px}}
@media(max-width:1050px){.page{padding-left:6%;padding-right:6%}.hero{grid-template-columns:1fr 1fr;min-height:610px;gap:10px}.architecture{margin-right:-25px;margin-left:-40px}.description{max-width:335px}.steps{gap:24px}.top-label{right:5%;font-size:7px}figcaption{right:4%;bottom:7%}}
@media(max-width:720px){.page{padding:24px 7% 0}.header{min-height:52px;gap:12px}.brand{width:160px;height:47px}.brand img{width:168px;left:-4px;top:-59px}.status{font-size:8px;letter-spacing:.07em;gap:8px}.status span{width:5px;height:5px}.hero{display:flex;flex-direction:column;align-items:stretch;min-height:0;padding:65px 0 20px;gap:0}.intro{padding:0}.eyebrow{font-size:9px;margin-bottom:24px;letter-spacing:.18em}h1{font-size:clamp(54px,12vw,78px)}.red-rule{margin:25px 0 23px;width:35px}.lead{font-size:21px}.desktop-break{display:none}.description{max-width:420px;font-size:13px;line-height:1.85}.soon{font-size:11px;margin-top:21px}.architecture{width:100%;margin:15px 0 0;aspect-ratio:1.1;min-height:285px;align-self:center;max-width:520px}.building{width:112%;flex-shrink:0}.top-label{top:4%;right:0;font-size:6px}figcaption{bottom:0;right:1%;font-size:10px}.footer{min-height:116px;align-items:flex-start;flex-direction:column;justify-content:center;gap:23px;margin-top:12px;padding:23px 0}.steps{gap:22px;flex-wrap:wrap;row-gap:12px}.steps li{font-size:10px;gap:8px}.steps li span{font-size:8px}.domain{font-size:10px}}
@media(max-width:360px){.status{font-size:7px}.brand{width:140px}.brand img{width:150px;top:-51px}h1{font-size:51px}.steps{gap:17px}.steps li{font-size:9px}}
@media(prefers-reduced-motion:no-preference){.intro,.architecture{animation:appear .85s ease both}.architecture{animation-delay:.12s}@keyframes appear{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:translateY(0)}}}
@media print{body::before{display:none}.page{min-height:0}.hero{min-height:580px}*{animation:none!important}}

/* Construction en huit étapes, structure et finitions. */
.architecture{padding-bottom:78px}
.building{overflow:visible}
.top-label{top:3%}
.construction-caption{bottom:45px;left:8%;right:auto;max-width:90%;font-size:10px;letter-spacing:.025em;white-space:nowrap}
.construction-controls{position:absolute;bottom:0;left:8%;right:7%;display:flex;align-items:center;gap:22px}
.construction-controls[hidden]{display:none}
.construction-controls button{font-family:inherit;font-size:10px;letter-spacing:.02em;color:#c9beb6;min-height:38px;padding:6px 0;border:0;border-bottom:1px solid #ffffff25;background:transparent;cursor:pointer;display:inline-flex;align-items:center;gap:12px}
.construction-controls button:hover{color:#fff;border-bottom-color:#ef292e}
.construction-controls button:focus-visible{outline:2px solid #ef292e;outline-offset:5px}
.construction-controls button span{color:#ef292e;font-size:17px}
.construction-controls button[aria-pressed="true"]{color:#fff;border-bottom-color:#ef292e}
@media(max-width:1050px){.construction-caption,.construction-controls{left:4%}.construction-caption{font-size:9px}}
@media(max-width:720px){.architecture{margin-top:32px;aspect-ratio:auto;height:auto;min-height:0;padding-bottom:90px}.building{width:112%;aspect-ratio:820/780}.top-label{top:0}.construction-caption{bottom:49px;left:0;font-size:9px}.construction-controls{left:0;right:0;bottom:0}.construction-controls button{min-height:42px;font-size:10px}}
@media print{.construction-controls{display:none}.construction-layer{transform:none!important;opacity:1!important}.construction-caption{bottom:0}.architecture{padding-bottom:25px}}

/* Signature grise alignée sur la largeur visible du logo. */
.brand{height:auto;overflow:visible}
.brand-mark{position:relative;width:100%;height:60px;overflow:hidden}
.brand-tagline{display:block;width:calc(100% - 6px);height:auto;margin:1px 0 0 3px;overflow:visible}
@media(max-width:720px){.brand-mark{height:47px}}

/* Contact et mentions de pied de page. */
.header-actions{display:flex;align-items:center;gap:32px}
.contact-menu{position:relative;z-index:10}
.contact-menu summary{list-style:none;cursor:pointer;display:flex;gap:11px;align-items:center;padding:10px 0;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#e7e0db}
.contact-menu summary::-webkit-details-marker{display:none}
.contact-menu summary span{color:var(--red);font-size:16px;line-height:10px;transition:transform .2s ease}
.contact-menu[open] summary span{transform:rotate(180deg)}
.contact-menu summary:focus-visible,.contact-panel a:focus-visible,.footer-meta a:focus-visible{outline:2px solid var(--red);outline-offset:5px}
.contact-panel{position:absolute;right:0;top:calc(100% + 10px);min-width:224px;padding:22px;background:#2c2627;border:1px solid #ffffff20;box-shadow:0 15px 38px #0003}
.contact-panel p{margin:0 0 12px;color:#a89f99;text-transform:uppercase;font-size:9px;letter-spacing:.14em}
.contact-panel a{color:#f4f1ed;font-size:15px;text-decoration:none;white-space:nowrap}
.contact-panel a:hover{color:var(--red)}
.footer{flex-wrap:wrap;min-height:132px;padding:24px 0;row-gap:24px}
.footer-meta{width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px}
.footer-meta a{font-size:11px;letter-spacing:.025em;color:#c6bbb3;text-decoration:none}
.footer-meta a:hover{color:#fff}
.footer-meta p{margin:0;color:#a89e98;font-size:10px;letter-spacing:.025em}
@media(max-width:720px){.header-actions{flex-direction:column;align-items:flex-end;gap:7px}.contact-menu summary{font-size:9px;padding:5px 0}.contact-panel{top:calc(100% + 22px);min-width:210px;padding:20px}.footer{align-items:stretch;gap:22px}.domain{align-self:flex-start}.footer-meta{gap:12px}.footer-meta a{font-size:10px}.footer-meta p{font-size:9px}}
@media(prefers-reduced-motion:reduce){.contact-menu summary span{transition:none}}

/* Bandeau BatiBudget : défilement continu, lien et pause accessible sans JavaScript. */
.promo-banner{position:relative;isolation:isolate;display:flex;align-items:center;min-height:48px;width:100%;background:#f5cb42;color:#231f20;overflow:hidden}
.promo-window{min-width:0;flex:1;overflow:hidden}
.promo-track{display:flex;width:max-content;animation:promo-scroll 34s linear infinite}
.promo-copy{display:block;flex-shrink:0;min-width:calc(100vw - 48px);padding:14px 72px 14px 28px;color:inherit;text-decoration:none;white-space:nowrap;font-size:14px;line-height:20px;letter-spacing:.01em}
.promo-copy strong{font-weight:700;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.promo-copy:hover strong{text-decoration-thickness:2px}
.promo-copy:focus-visible{outline:2px solid #231f20;outline-offset:-5px}
.promo-pause{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.promo-control{width:44px;max-width:44px;position:relative;z-index:1;display:flex;align-items:center;justify-content:center;align-self:stretch;flex:0 0 44px;min-height:48px;cursor:pointer;background:#f5cb42;border-left:1px solid #231f2028}
.promo-control svg{display:block;width:18px;height:18px;max-width:18px;max-height:18px;flex:none}
.promo-control .promo-play-icon{display:none}
.promo-banner:hover .promo-track,.promo-window:focus-within .promo-track,.promo-pause:checked~.promo-window .promo-track{animation-play-state:paused}
.promo-pause:checked~.promo-control .promo-pause-icon{display:none}
.promo-pause:checked~.promo-control .promo-play-icon{display:block}
.promo-pause:focus-visible~.promo-control{outline:2px solid #231f20;outline-offset:-5px}
.page{min-height:calc(100svh - 48px)}
@keyframes promo-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(max-width:720px){.promo-banner{min-height:44px}.promo-copy{min-width:calc(100vw - 44px);font-size:12px;line-height:20px;padding:12px 48px 12px 20px}.promo-control{flex-basis:44px;min-height:44px}.page{min-height:calc(100svh - 44px)}}
@media(prefers-reduced-motion:reduce){.promo-track{animation:none;width:100%;transform:none}.promo-copy{width:100%;min-width:0;white-space:normal;padding:13px 20px}.promo-copy[aria-hidden="true"],.promo-pause,.promo-control{display:none}}
@media print{.promo-track{animation:none;width:100%;transform:none}.promo-copy{min-width:0;white-space:normal}.promo-copy[aria-hidden="true"],.promo-pause,.promo-control{display:none}}

/* Prestations : présentation éditoriale en cinq domaines. */
main{display:block;flex:1;min-width:0;min-height:0;padding:0}
.header-navigation{display:flex;align-items:center;gap:25px}
.services-link{color:#e7e0db;text-decoration:none;font-size:11px;letter-spacing:.12em;text-transform:uppercase;padding:10px 0}
.services-link:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--red);text-underline-offset:7px}
.services-link:focus-visible,.services-contact:focus-visible{outline:2px solid var(--red);outline-offset:5px}
.services{border-top:1px solid #ffffff20;display:grid;grid-template-columns:.85fr 1.3fr;gap:72px;padding:68px 0 76px;scroll-margin-top:25px}
.services-intro{min-width:0}
.services-intro .eyebrow{margin-bottom:25px}
.services h2{margin:0 0 24px;font-weight:400;font-size:clamp(27px,3vw,40px);line-height:1.17;letter-spacing:-.04em}
.services-intro>p:not(.eyebrow){max-width:335px;color:var(--muted);font-size:13px;line-height:1.95;margin:0}
.services-contact{display:inline-flex;align-items:center;gap:19px;margin-top:28px;padding-bottom:9px;border-bottom:1px solid #ffffff30;color:#eee6df;font-size:12px;text-decoration:none}
.services-contact span{color:var(--red);font-size:17px}
.services-contact:hover{border-bottom-color:var(--red)}
.services-list{list-style:none;margin:0;padding:0;min-width:0}
.services-list li{display:grid;grid-template-columns:26px minmax(0,1fr);gap:19px;padding:24px 0;border-bottom:1px solid #ffffff18}
.services-list li:first-child{padding-top:0}
.services-list li:last-child{border-bottom:0;padding-bottom:0}
.service-number{padding-top:5px;color:#b59f8f;font-size:10px;letter-spacing:.08em}
.services h3{margin:0 0 10px;font-size:19px;font-weight:400;line-height:1.4;letter-spacing:-.015em}
.services-list p{margin:0;color:var(--muted);font-size:13px;line-height:1.85}
@media(max-width:1050px){.header-actions{gap:18px}.header-navigation{gap:18px}.header-actions .status{font-size:9px}.services-link{font-size:9px;letter-spacing:.08em}.services{gap:38px;grid-template-columns:.85fr 1.2fr}.services h3{font-size:17px}.services-list li{gap:12px}}
@media(max-width:720px){.header-actions{gap:7px}.header-actions .status{font-size:8px}.header-navigation{gap:14px}.services-link{font-size:8px;padding:5px 0}.services{grid-template-columns:1fr;gap:34px;padding:44px 0 48px;scroll-margin-top:20px}.services h2{font-size:31px}.services-intro .eyebrow{margin-bottom:20px}.services-intro>p:not(.eyebrow){max-width:420px}.services-contact{margin-top:20px}.services-list li{padding:22px 0;grid-template-columns:22px minmax(0,1fr);gap:14px}.services h3{font-size:18px}.services-list p{font-size:12px}}
@media(max-width:360px){.header-navigation{flex-direction:column;align-items:flex-end;gap:0}.header-actions .status{font-size:7px}.services h2{font-size:27px}.services h3{font-size:17px}}
@media print{.services{break-before:auto;padding:30px 0}.services-list li{break-inside:avoid}}

/* Transition de l’accueil vers les prestations. */
html{scroll-behavior:smooth}
.services-chapter{scroll-margin-top:24px}
.project-transition{padding:50px 0 48px;border-top:1px solid #ffffff20;overflow:hidden}
.transition-kicker{margin:0 0 21px;color:#b9aaa0;font-size:10px;line-height:1.5;letter-spacing:.18em;text-transform:uppercase}
.transition-words{display:flex;flex-wrap:wrap;column-gap:28px;row-gap:7px;margin:0;font-size:clamp(32px,5.25vw,65px);font-weight:400;line-height:1.12;letter-spacing:-.045em}
.transition-words>span{display:inline-block}
.transition-words em{font-style:normal;color:var(--red)}
.transition-rule{height:1px;width:64px;background:var(--red);margin-top:27px;transform-origin:left}
.discover-services{display:inline-flex;align-items:center;gap:16px;margin-top:21px;padding:8px 0;border-bottom:1px solid #ffffff35;color:#e6dcd3;font-size:11px;text-decoration:none}
.discover-services span{color:var(--red);font-size:16px}
.discover-services:hover{border-bottom-color:var(--red)}
.back-to-top{display:flex;align-items:center;gap:10px;width:fit-content;margin-top:22px;padding:4px 0;color:#aa9e96;font-size:10px;text-decoration:none}
.back-to-top:hover{color:#f4f1ed}
.back-to-top span{color:var(--red);font-size:14px}
.discover-services:focus-visible,.back-to-top:focus-visible{outline:2px solid var(--red);outline-offset:5px}
.motion-ready{transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1);transition-delay:var(--motion-delay,0ms)}
.motion-ready:not(.is-visible){opacity:0;transform:translateY(24px)}
.motion-ready.is-visible{opacity:1;transform:translateY(0)}
.services-list>li.motion-ready:not(.is-visible){transform:translate(20px,10px)}
.transition-rule.motion-ready:not(.is-visible){transform:scaleX(.02)}
.transition-rule.motion-ready.is-visible{transform:scaleX(1)}
@media(max-width:720px){.project-transition{padding:38px 0 36px}.transition-kicker{font-size:9px;letter-spacing:.12em}.transition-words{flex-direction:column;align-items:flex-start;font-size:38px;row-gap:4px}.transition-rule{margin-top:22px}.services-chapter{scroll-margin-top:18px}.discover-services{font-size:10px;margin-top:18px}.back-to-top{margin-top:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.motion-ready{transition:none;transition-delay:0s}.motion-ready:not(.is-visible),.services-list>li.motion-ready:not(.is-visible),.transition-rule.motion-ready:not(.is-visible){opacity:1;transform:none}}
@media print{html{scroll-behavior:auto}.motion-ready,.motion-ready:not(.is-visible),.services-list>li.motion-ready:not(.is-visible),.transition-rule.motion-ready:not(.is-visible){opacity:1;transform:none;transition:none}.project-transition{padding:25px 0}.discover-services,.back-to-top{display:none}}

/* Rythme de lecture et signature graphique de la version 9. */
:root{--accent-rule-width:41px;--accent-rule-height:3px}
.red-rule,.transition-rule{width:var(--accent-rule-width);height:var(--accent-rule-height)}
h1 .title-dot{color:var(--red)}
.motion-ready{transition-duration:var(--motion-duration,1100ms)}
@media(max-width:720px){:root{--accent-rule-width:35px}}
@media(prefers-reduced-motion:reduce){.motion-ready{transition-duration:0s;transition-delay:0s}}

/* Récapitulatif complet des cinq prestations en pied de page. */
.footer .steps{flex:1 1 580px;min-width:0;flex-wrap:wrap;gap:14px 24px}
.footer .steps li{white-space:nowrap}
.footer .steps abbr{font:inherit;color:inherit;text-decoration:none;cursor:inherit}
@media(max-width:720px){.footer .steps{flex:0 1 auto;gap:14px 22px}}