/* =========================================================
   C10 BÂTIMENT · Page d'accueil · Version 2
   Base lumineuse, profondeur (cartes en relief, panneaux qui se superposent,
   verre dépoli, parallaxe) et palette tirée du logo C10.
   ========================================================= */
:root{
  --anthracite:#211f1d;
  --anthracite-2:#2c2a27;
  --graphite:#3f3d3a;      /* le « 0 » du logo */
  --taupe:#7f7c74;         /* le « C » du logo */
  --greige:#cbc5ba;        /* le « 1 » du logo */
  --sable:#ede6da;
  --lin:#f7f4ef;
  --blanc:#ffffff;
  --champagne:#c8a878;     /* touche lumineuse, dérivée du greige */
  --bronze:#7d5f37;        /* version lisible de la touche sur fond clair */

  --ink:#211f1d;
  --ink-soft:#5a5751;
  --on-dark:#f7f4ef;
  --on-dark-soft:#c4beb3;
  --line:rgba(33,31,29,.1);
  --line-dark:rgba(247,244,239,.14);

  --shadow-1:0 1px 2px rgba(33,31,29,.05),0 14px 34px -16px rgba(33,31,29,.22);
  --shadow-2:0 2px 6px rgba(33,31,29,.05),0 30px 60px -28px rgba(33,31,29,.32);
  --shadow-3:0 4px 10px rgba(33,31,29,.05),0 50px 90px -36px rgba(33,31,29,.42);

  --container:1240px;
  --gutter:clamp(20px,4vw,56px);
  --pad:clamp(84px,9vw,144px);
  --r-sheet:48px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:"Urbanist",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:1.0625rem;line-height:1.65;font-weight:450;color:var(--ink);background:var(--lin);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.02em;line-height:1.08}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--bronze);outline-offset:3px}
.is-dark :focus-visible{outline-color:var(--champagne)}
section[id]{scroll-margin-top:96px}

.skip-link{position:absolute;left:16px;top:-60px;z-index:100;background:var(--anthracite);color:var(--lin);padding:10px 18px;border-radius:999px;text-decoration:none;font-weight:600}
.skip-link:focus{top:12px}
.icon{width:1.15em;height:1.15em;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.container{width:100%;max-width:calc(var(--container) + 2 * var(--gutter));margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--pad) calc(var(--pad) + var(--r-sheet))}
.is-dark{color:var(--on-dark)}
.h2{font-size:clamp(2.1rem,1.2rem + 2.7vw,3.7rem);letter-spacing:-.034em;line-height:1.03}
.lead{font-size:clamp(1.06rem,1rem + .3vw,1.22rem);line-height:1.6;color:var(--ink-soft)}
.is-dark .lead{color:var(--on-dark-soft)}
.section-head{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px 64px;align-items:end;margin-bottom:clamp(44px,5vw,72px)}
.section-head .lead{max-width:46ch}

/* Panneaux qui se superposent : chaque section glisse sur la précédente */
.sheet{position:relative;margin-top:calc(-1 * var(--r-sheet));border-radius:var(--r-sheet) var(--r-sheet) 0 0;box-shadow:0 -30px 60px -44px rgba(33,31,29,.55)}

/* ---------- Boutons et liens ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  min-height:54px;padding:0 1.65em;border-radius:999px;
  font-weight:650;font-size:1rem;letter-spacing:.005em;line-height:1.2;
  text-decoration:none;border:1.5px solid transparent;cursor:pointer;
  transition:background-color .25s,color .25s,border-color .25s,box-shadow .25s,transform .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--dark{background:var(--anthracite);color:var(--lin);box-shadow:0 14px 30px -16px rgba(33,31,29,.6)}
.btn--dark:hover{background:var(--graphite)}
.btn--white{background:#fff;color:var(--ink);box-shadow:var(--shadow-1)}
.btn--white:hover{box-shadow:var(--shadow-2)}
.btn--champagne{background:var(--champagne);color:var(--anthracite);box-shadow:0 16px 36px -18px rgba(200,168,120,.7)}
.btn--champagne:hover{background:#d6bb8f}
.btn--ghost{border-color:rgba(247,244,239,.4);color:var(--on-dark)}
.btn--ghost:hover{background:var(--on-dark);border-color:var(--on-dark);color:var(--anthracite)}
.link{
  display:inline-block;font-weight:650;text-decoration:none;padding-bottom:5px;
  background:linear-gradient(currentColor,currentColor) 0 100%/100% 1.5px no-repeat;
  transition:background-size .35s var(--ease);
}
.link:hover{background-size:40% 1.5px}
.round-icon{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;flex:none;background:#fff;color:var(--ink);transition:transform .45s var(--ease)}
.round-icon .icon{width:20px;height:20px}

/* =========================================================
   EN-TÊTE FLOTTANT
   ========================================================= */
.site-header{position:fixed;top:14px;left:0;right:0;z-index:60;padding-inline:var(--gutter);pointer-events:none;transition:transform .5s var(--ease)}
.site-header.is-hidden{transform:translateY(calc(-100% - 24px))}
.header-bar{
  pointer-events:auto;max-width:calc(var(--container) + 40px);margin-inline:auto;height:68px;
  display:flex;align-items:center;gap:24px;padding:0 10px 0 24px;border-radius:999px;
  background:rgba(255,255,255,.66);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);
  border:1px solid rgba(255,255,255,.8);box-shadow:0 14px 36px -18px rgba(33,31,29,.3);
  transition:background-color .35s,box-shadow .35s;
}
.site-header.is-scrolled .header-bar{background:rgba(255,255,255,.88);box-shadow:0 18px 44px -20px rgba(33,31,29,.38)}
.brand{display:flex;align-items:center;flex:none}
.brand img{height:38px;width:auto}
.nav{margin-left:auto}
.nav__list{display:flex;align-items:center;gap:clamp(14px,1.8vw,28px)}
.nav__link{position:relative;display:inline-flex;align-items:center;gap:6px;padding:10px 0;font-weight:600;font-size:.96rem;text-decoration:none;white-space:nowrap}
.nav__link::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1.5px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.nav__link:hover::after,.nav__link[aria-current="page"]::after{transform:scaleX(1)}
.nav__link .icon{width:14px;height:14px;transition:transform .3s}
.has-dropdown{position:relative}
.has-dropdown:hover .nav__link .icon,.has-dropdown:focus-within .nav__link .icon{transform:rotate(180deg)}
.dropdown{
  position:absolute;top:calc(100% + 18px);left:-24px;width:340px;padding:10px;background:#fff;border-radius:22px;
  box-shadow:0 0 0 1px var(--line),var(--shadow-3);
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .25s,transform .25s var(--ease),visibility 0s .25s;
}
.dropdown::before{content:"";position:absolute;left:0;right:0;top:-22px;height:22px}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown{opacity:1;visibility:visible;transform:none;transition:opacity .25s,transform .25s var(--ease)}
.dropdown a{display:flex;gap:14px;align-items:center;padding:12px;border-radius:14px;text-decoration:none;transition:background-color .2s}
.dropdown a:hover{background:var(--lin)}
.dropdown img{width:56px;height:56px;border-radius:12px;object-fit:cover;flex:none}
.dropdown strong{display:block;font-weight:650;font-size:1rem}
.dropdown span{display:block;font-size:.87rem;line-height:1.4;color:var(--ink-soft)}
.header-actions{display:flex;align-items:center;gap:6px;flex:none}
.header-phone{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 16px;border-radius:999px;font-weight:650;text-decoration:none;white-space:nowrap;transition:background-color .25s}
.header-phone:hover{background:rgba(33,31,29,.06)}
.header-phone .icon{width:18px;height:18px}
.header-actions .btn{min-height:48px;padding:0 1.35em;font-size:.95rem}
.header-tools{display:none;gap:8px;align-items:center}
.burger,.phone-round{width:46px;height:46px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;text-decoration:none}
.burger{border:0;background:var(--anthracite);color:var(--lin)}
.phone-round{background:rgba(33,31,29,.07);color:var(--ink)}
.burger .icon,.phone-round .icon{width:20px;height:20px}

/* Menu mobile */
.mobile-menu{
  position:fixed;inset:0;z-index:70;display:flex;flex-direction:column;background:var(--anthracite);color:var(--on-dark);
  padding:18px var(--gutter) calc(28px + env(safe-area-inset-bottom));overflow-y:auto;
  clip-path:circle(0% at calc(100% - 44px) 44px);visibility:hidden;
  transition:clip-path .7s var(--ease),visibility 0s .7s;
}
.mobile-menu.is-open{clip-path:circle(150% at calc(100% - 44px) 44px);visibility:visible;transition:clip-path .7s var(--ease)}
.mobile-menu__top{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.mobile-menu__top img{height:38px;width:auto;filter:brightness(0) invert(1);opacity:.95}
.mobile-menu__close{width:46px;height:46px;border-radius:50%;border:1px solid var(--line-dark);background:rgba(255,255,255,.06);display:grid;place-items:center;cursor:pointer}
.mobile-menu__close .icon{width:22px;height:22px}
.mobile-menu__nav{margin-top:36px}
.mobile-menu__nav > ul > li{border-bottom:1px solid var(--line-dark)}
.mobile-menu__nav a{display:block;text-decoration:none}
.mobile-menu__nav > ul > li > a{padding:16px 0;font-size:1.7rem;font-weight:600;letter-spacing:-.02em}
.mobile-menu__sub{padding:0 0 16px 2px}
.mobile-menu__sub a{padding:6px 0;font-size:1.08rem;color:var(--on-dark-soft)}
.mobile-menu__foot{margin-top:auto;padding-top:36px;display:grid;gap:12px}
.mobile-menu__foot .btn{width:100%}
.mobile-menu__mail{display:flex;align-items:center;gap:10px;color:var(--on-dark-soft);text-decoration:none;padding-top:6px}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.06fr);
  min-height:clamp(680px,100vh,940px);min-height:clamp(680px,100svh,940px);
  background:radial-gradient(900px 620px at 0% 0%,#fff 0%,rgba(255,255,255,0) 62%),var(--lin);
}
.hero__content{
  display:flex;flex-direction:column;justify-content:center;
  padding-top:clamp(124px,15vh,168px);padding-bottom:clamp(120px,13vh,160px);
  padding-inline-start:max(var(--gutter),calc((100vw - var(--container)) / 2));
  padding-inline-end:clamp(32px,4vw,72px);
}
.hero__title{font-size:clamp(2.6rem,1.1rem + 3.7vw,4.6rem);line-height:1;letter-spacing:-.04em;font-weight:650;max-width:14.2ch}
@media (min-width:1600px){.hero{grid-template-columns:minmax(0,1.12fr) minmax(0,1fr)}}
.hero__title .w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.1em;margin-bottom:-.1em}
.hero__title .w > span{display:inline-block}
.hero__lead{margin-top:28px;max-width:50ch}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.hero__note{display:flex;align-items:center;gap:10px;margin-top:22px;font-size:.95rem;font-weight:550;color:var(--ink-soft)}
.hero__note .icon{width:18px;height:18px;color:var(--bronze)}

.hero__media{position:relative;min-height:440px;filter:drop-shadow(-26px 26px 50px rgba(33,31,29,.2))}
/* Arc champagne décalé : rappel du « C » et du « 0 » du monogramme */
.hero__media::before{content:"";position:absolute;inset:0 0 0 -30px;pointer-events:none;border:1.5px solid rgba(200,168,120,.8);border-right:0;border-radius:999px 0 0 999px}
.hero__visual{position:absolute;inset:0;overflow:hidden;border-radius:999px 0 0 999px;background:var(--greige)}
.hero__visual::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(26,24,22,.42),rgba(26,24,22,0) 42%);pointer-events:none}
.hero__slide{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.07);transition:opacity 1.4s var(--ease),transform 8s linear}
.hero__slide.is-active{opacity:1;transform:scale(1)}
.hero__control{
  position:absolute;z-index:3;right:clamp(20px,3vw,44px);bottom:calc(72px + 36px);
  display:flex;align-items:center;gap:16px;padding:8px 8px 8px 20px;border-radius:999px;color:#fff;
  background:rgba(26,24,22,.34);-webkit-backdrop-filter:blur(16px) saturate(1.3);backdrop-filter:blur(16px) saturate(1.3);
  border:1px solid rgba(255,255,255,.18);overflow:hidden;
}
.hero__count{font-weight:650;font-size:.9rem;letter-spacing:.03em;opacity:.85}
.hero__caption{font-weight:600;min-width:10ch}
.hero__arrows{display:flex;gap:6px}
.hero__arrow{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.1);color:#fff;display:grid;place-items:center;cursor:pointer;transition:background-color .25s}
.hero__arrow:hover{background:rgba(255,255,255,.26)}
.hero__arrow .icon{width:18px;height:18px}
.hero__progress{position:absolute;left:20px;right:20px;bottom:0;height:2px;background:rgba(255,255,255,.18)}
.hero__progress span{display:block;height:100%;background:var(--champagne);transform-origin:left;transform:scaleX(0)}
.hero__progress span.is-running{animation:bar 6.5s linear forwards}
@keyframes bar{to{transform:scaleX(1)}}

/* Séquence d'arrivée */
.js .hero__title .w > span{transform:translateY(108%);transition:transform 1s var(--ease);transition-delay:calc(var(--i,0) * 45ms + 120ms)}
.js .hero__lead,.js .hero__actions,.js .hero__note,.js .hero__control{opacity:0;transform:translateY(14px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .hero__lead{transition-delay:.55s}
.js .hero__actions{transition-delay:.68s}
.js .hero__note{transition-delay:.8s}
.js .hero__control{transition-delay:1.3s}
.js .hero__visual{clip-path:inset(0 0 0 100%);transition:clip-path 1.5s var(--ease) .15s}
.js .hero__media::before{opacity:0;transition:opacity 1s ease 1.1s}
.is-loaded .hero__title .w > span{transform:none}
.is-loaded .hero__lead,.is-loaded .hero__actions,.is-loaded .hero__note,.is-loaded .hero__control{opacity:1;transform:none}
.is-loaded .hero__visual{clip-path:inset(0 0 0 0)}
.is-loaded .hero__media::before{opacity:1}

/* Carte d'engagements qui chevauche le hero */
.facts{position:relative;z-index:5;margin-top:-72px}
.facts__card{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:#fff;border-radius:28px;box-shadow:var(--shadow-3);padding:28px 8px}
.facts__item{display:flex;gap:16px;align-items:flex-start;padding:4px clamp(16px,2vw,30px);border-left:1px solid var(--line)}
.facts__item:first-child{border-left:0}
.facts__icon{flex:none;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--sable);color:var(--bronze)}
.facts__icon .icon{width:22px;height:22px}
.facts__title{font-weight:650;font-size:1.06rem;line-height:1.3}
.facts__text{margin-top:3px;font-size:.93rem;line-height:1.45;color:var(--ink-soft)}

/* =========================================================
   À PROPOS
   ========================================================= */
.about{background:var(--lin)}
.about.section{padding-top:clamp(84px,8vw,128px)}
.about__grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6.2fr);gap:clamp(48px,6vw,104px);align-items:center}
.about__media{position:relative;padding:0 14% 12% 0}
.about__arch{position:relative;aspect-ratio:4/5;overflow:hidden;border-radius:999px 999px 28px 28px;box-shadow:var(--shadow-2);background:var(--greige)}
.about__arch img,.about__inset img{width:100%;height:100%;object-fit:cover}
.about__inset{position:absolute;right:0;bottom:0;width:46%;aspect-ratio:1;overflow:hidden;border-radius:24px;border:8px solid #fff;box-shadow:var(--shadow-3);background:var(--greige)}
.about__chip{
  position:absolute;left:-14px;top:58%;z-index:2;display:flex;align-items:center;gap:10px;padding:10px 16px 10px 10px;border-radius:999px;
  background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:var(--shadow-2);font-weight:650;font-size:.95rem;
}
.about__chip .round-icon{width:36px;height:36px;background:var(--anthracite);color:var(--champagne)}
.about__chip .round-icon .icon{width:18px;height:18px}
.about__content .h2{max-width:14ch}
.about__text{margin-top:26px;display:grid;gap:14px;max-width:60ch;color:var(--ink-soft)}
.about__text strong{color:var(--ink);font-weight:650}
.about__tiles{margin-top:36px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:16px}
.tile{border-radius:24px;padding:26px 26px 28px}
.tile--dark{background:var(--anthracite);color:var(--on-dark);box-shadow:var(--shadow-2)}
.tile--white{background:#fff;box-shadow:var(--shadow-1);display:flex;flex-direction:column}
.tile h3{font-size:1.06rem;letter-spacing:-.01em}
.clients{margin-top:18px;display:grid;gap:14px}
.clients li{display:flex;gap:12px;align-items:flex-start}
.clients .icon{width:20px;height:20px;margin-top:2px;color:var(--champagne)}
.clients strong{display:block;font-weight:650;line-height:1.3}
.clients span{display:block;margin-top:2px;font-size:.9rem;line-height:1.45;color:var(--on-dark-soft)}
.checks{margin-top:18px;display:grid;gap:12px}
.checks li{display:flex;gap:10px;align-items:center;font-weight:600;font-size:.97rem;line-height:1.35}
.checks .icon{width:20px;height:20px;color:var(--bronze)}
.tile--white .link{margin-top:auto;padding-top:22px;align-self:flex-start;background-position:0 100%}

/* =========================================================
   DOMAINES D'INTERVENTION
   ========================================================= */
.domaines{background:radial-gradient(760px 460px at 92% 0%,rgba(200,168,120,.17),rgba(200,168,120,0) 70%),radial-gradient(640px 420px at 0% 100%,rgba(203,197,186,.08),rgba(203,197,186,0) 70%),var(--anthracite)}
.dgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,3vw,40px);align-items:start}
.dcard{position:relative;height:clamp(520px,46vw,640px);border-radius:30px;overflow:hidden;background:var(--graphite);box-shadow:0 44px 80px -44px rgba(0,0,0,.75)}
.dcard:nth-child(2){margin-top:clamp(0px,6vw,96px)}
.dcard > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease)}
.dcard:hover > img{transform:scale(1.05)}
.dcard__panel{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:2;padding:26px 26px 24px;border-radius:22px;color:#fff;
  background:rgba(26,24,22,.5);-webkit-backdrop-filter:blur(18px) saturate(1.2);backdrop-filter:blur(18px) saturate(1.2);border:1px solid rgba(255,255,255,.14);
}
.dcard__head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.dcard h3{font-size:clamp(1.55rem,1.1rem + 1vw,2.1rem);letter-spacing:-.025em}
.dcard p{margin-top:10px;max-width:50ch;color:rgba(255,255,255,.84)}
.dcard:hover .round-icon{transform:rotate(45deg)}
.dcard__link{position:absolute;inset:0;z-index:4;border-radius:inherit}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tags li{border:1px solid rgba(255,255,255,.3);border-radius:999px;padding:5px 14px;font-size:.9rem;font-weight:550;line-height:1.4}

/* =========================================================
   SAVOIR-FAIRE
   ========================================================= */
.savoirs{background:var(--sable)}
.savoirs__grid{display:grid;grid-template-columns:minmax(0,6.4fr) minmax(0,5fr);gap:clamp(40px,6vw,96px);align-items:start}
.savoirs__main .lead{margin-top:20px;max-width:46ch}
.savoirs__list{margin-top:40px;display:grid;gap:6px}
.savoir{border-radius:20px;transition:background-color .4s,box-shadow .4s}
.savoir.is-active{background:#fff;box-shadow:var(--shadow-1)}
.savoir__thumb{display:none}
.savoir__heading{font-size:inherit;letter-spacing:0}
.savoir__btn{display:flex;align-items:center;gap:18px;width:100%;padding:18px 22px;border:0;background:none;text-align:left;cursor:pointer}
.savoir__ring{flex:none;width:14px;height:14px;border-radius:50%;border:1.5px solid var(--ink);transition:background-color .3s,border-color .3s,box-shadow .3s}
.savoir.is-active .savoir__ring{background:var(--champagne);border-color:var(--champagne);box-shadow:0 0 0 6px rgba(200,168,120,.22)}
.savoir__title{flex:1;font-size:clamp(1.3rem,.95rem + 1.1vw,1.9rem);font-weight:600;letter-spacing:-.022em;line-height:1.15;opacity:.7;transition:opacity .3s}
.savoir:hover .savoir__title,.savoir.is-active .savoir__title{opacity:1}
.savoir__desc{display:grid;grid-template-rows:1fr;transition:grid-template-rows .45s var(--ease)}
.js .savoir__desc{grid-template-rows:0fr}
.js .savoir.is-active .savoir__desc{grid-template-rows:1fr}
.savoir__desc > div{overflow:hidden}
.savoir__desc p{padding:0 22px 20px 54px;max-width:56ch;color:var(--ink-soft)}
.savoirs__visual{position:sticky;top:112px}
.savoirs__frame{position:relative;aspect-ratio:4/5;max-height:74vh;width:100%;border-radius:30px;overflow:hidden;box-shadow:var(--shadow-3);background:var(--taupe)}
.savoirs__frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.06);transition:opacity .7s var(--ease),transform 1.4s var(--ease)}
.savoirs__frame img.is-active{opacity:1;transform:none}
.savoirs__label{
  position:absolute;left:-28px;bottom:36px;z-index:4;display:flex;align-items:center;gap:12px;max-width:85%;padding:14px 20px 14px 16px;border-radius:18px;
  background:rgba(255,255,255,.86);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow-2);
  font-weight:650;font-size:1.08rem;letter-spacing:-.01em;line-height:1.25;
}
.savoirs__label::before{content:"";flex:none;width:10px;height:10px;border-radius:50%;background:var(--champagne);box-shadow:0 0 0 5px rgba(200,168,120,.22)}

/* =========================================================
   MÉTHODE (grille de 4 cartes, sans effet de défilement)
   ========================================================= */
.methode{background:radial-gradient(820px 520px at 6% 0%,rgba(200,168,120,.15),rgba(200,168,120,0) 70%),var(--anthracite-2)}
.methode__grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6.4fr);gap:clamp(40px,6vw,96px);align-items:center}
.methode__intro .lead{margin-top:20px;max-width:42ch}
.methode__photo{position:relative;margin:34px 0 0;aspect-ratio:16/10;border-radius:26px;overflow:hidden;box-shadow:0 34px 70px -34px rgba(0,0,0,.7);background:var(--graphite)}
.methode__photo img{width:100%;height:100%;object-fit:cover}
.methode__intro .btn{margin-top:28px}
.steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:start}
.step:nth-child(even){margin-top:48px}
.step{
  display:flex;flex-direction:column;gap:12px;padding:clamp(26px,2.6vw,36px);border-radius:26px;background:#fff;color:var(--ink);
  box-shadow:0 34px 64px -36px rgba(0,0,0,.7);transition:box-shadow .4s,transform .45s var(--ease);
}
.step:hover{transform:translateY(-4px)}
.step__num{font-size:clamp(2.6rem,1.9rem + 1.5vw,3.6rem);font-weight:300;letter-spacing:-.05em;line-height:.9;color:var(--bronze)}
.step h3{margin-top:6px;font-size:clamp(1.25rem,1.1rem + .45vw,1.55rem);letter-spacing:-.022em}
.step p{color:var(--ink-soft);font-size:1rem}

/* =========================================================
   RÉALISATIONS + RÉFÉRENCES
   ========================================================= */
.realisations{background:var(--lin)}
.realisations__more{justify-self:end}
.projects{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));grid-auto-rows:clamp(210px,21vw,300px);gap:clamp(12px,1.4vw,18px)}
.project{position:relative;display:block;overflow:hidden;border-radius:24px;background:var(--greige);color:#fff;text-decoration:none;box-shadow:var(--shadow-1);transition:transform .45s var(--ease),box-shadow .45s}
.project:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.project:nth-child(1){grid-column:span 7;grid-row:span 2}
.project:nth-child(2),.project:nth-child(3){grid-column:span 5}
.project:nth-child(n+4){grid-column:span 4}
.project > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.project:hover > img{transform:scale(1.05)}
.project::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(26,24,22,.8) 0%,rgba(26,24,22,.2) 40%,rgba(26,24,22,0) 62%)}
.project__tag{position:absolute;top:16px;left:16px;z-index:2;padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--ink);font-size:.82rem;font-weight:650}
.project .round-icon{position:absolute;top:12px;right:12px;z-index:2;width:42px;height:42px;opacity:0;transform:scale(.7) rotate(-45deg);transition:opacity .35s,transform .45s var(--ease)}
.project:hover .round-icon{opacity:1;transform:none}
.project__caption{position:absolute;left:clamp(18px,2vw,26px);right:clamp(18px,2vw,26px);bottom:clamp(16px,1.8vw,22px);z-index:2}
.project__name{font-size:clamp(1.12rem,1rem + .4vw,1.4rem);letter-spacing:-.015em;line-height:1.2}

.refs{margin-top:clamp(72px,8vw,120px)}
.refs__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 40px;margin-bottom:26px}
.refs__title{font-size:clamp(1.55rem,1.1rem + 1vw,2.2rem);letter-spacing:-.026em}
.refs__head p{color:var(--ink-soft);max-width:48ch}
.marquee{overflow:hidden;padding-block:14px 26px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent)}
.marquee__track{display:flex;gap:14px;width:max-content;animation:marquee 46s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.logo-tile{flex:none;width:172px;height:120px;padding:6px;border-radius:20px;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-1)}
.logo-tile img{max-width:100%;max-height:100%;width:auto;height:auto;mix-blend-mode:multiply;filter:grayscale(1);opacity:.8;transition:filter .4s,opacity .4s}
.logo-tile:hover img{filter:none;opacity:1}
@keyframes marquee{to{transform:translateX(calc(-50% - 7px))}}

/* =========================================================
   PROMESSE (photo plein écran avec parallaxe)
   ========================================================= */
.promesse{overflow:hidden;background:var(--anthracite);color:#fff}
.promesse__bg{position:absolute;inset:0;overflow:hidden}
.promesse__bg img{position:absolute;left:0;top:-10%;width:100%;height:120%;object-fit:cover;will-change:transform}
.promesse__bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(26,24,22,.84) 0%,rgba(26,24,22,.5) 48%,rgba(26,24,22,.12) 100%),linear-gradient(to top,rgba(26,24,22,.72) 0%,rgba(26,24,22,0) 55%)}
.promesse__inner{position:relative;min-height:clamp(680px,92vh,900px);display:flex;flex-direction:column;justify-content:space-between;gap:56px;padding-block:var(--pad) calc(var(--pad) + var(--r-sheet))}
.promesse__statement{font-size:clamp(1.9rem,1rem + 2.6vw,3.4rem);line-height:1.12;letter-spacing:-.03em;font-weight:550;max-width:22ch}
.values{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.value{
  display:flex;gap:18px;align-items:center;padding:16px 22px 16px 16px;border-radius:24px;
  background:rgba(26,24,22,.36);-webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);border:1px solid rgba(255,255,255,.16);
}
.value__swatch{flex:none;width:76px;height:76px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,.55);box-shadow:0 10px 24px -10px rgba(0,0,0,.6)}
.value h3{font-size:1.5rem;letter-spacing:-.025em}
.value p{margin-top:4px;font-size:.95rem;line-height:1.45;color:rgba(255,255,255,.84)}

/* =========================================================
   FAQ
   ========================================================= */
.faq{background:var(--sable)}
.faq__grid{display:grid;grid-template-columns:minmax(0,4.2fr) minmax(0,7fr);gap:clamp(40px,6vw,96px);align-items:start}
.faq__intro{position:sticky;top:112px}
.faq__intro .lead{margin-top:20px;max-width:40ch}
.help-card{margin-top:32px;padding:26px 26px 28px;border-radius:24px;background:var(--anthracite);color:var(--on-dark);box-shadow:var(--shadow-2)}
.help-card p{color:var(--on-dark-soft);font-size:.97rem}
.help-card__phone{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:1.45rem;font-weight:650;letter-spacing:-.01em;text-decoration:none}
.help-card__phone .icon{color:var(--champagne)}
.help-card .btn{margin-top:20px}
.faq__list{display:grid;gap:12px}
.faq__item{background:#fff;border-radius:20px;box-shadow:var(--shadow-1);transition:box-shadow .35s}
.faq__item.is-open{box-shadow:var(--shadow-2)}
.faq__heading{font-size:inherit;letter-spacing:0}
.faq__q{
  display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;padding:22px 22px 22px 26px;border:0;background:none;text-align:left;cursor:pointer;
  font-size:clamp(1.08rem,1rem + .3vw,1.24rem);font-weight:600;letter-spacing:-.01em;line-height:1.35;
}
.faq__icon{flex:none;width:38px;height:38px;border-radius:50%;background:var(--sable);display:grid;place-items:center;transition:transform .45s var(--ease),background-color .3s}
.faq__icon .icon{width:16px;height:16px}
.faq__item.is-open .faq__icon{transform:rotate(45deg);background:var(--champagne)}
.faq__a{display:grid;grid-template-rows:1fr;transition:grid-template-rows .45s var(--ease)}
.js .faq__a{grid-template-rows:0fr}
.js .faq__item.is-open .faq__a{grid-template-rows:1fr}
.faq__a > div{overflow:hidden}
.faq__a p{padding:0 72px 24px 26px;max-width:66ch;color:var(--ink-soft)}

/* =========================================================
   CONTACT ET PIED DE PAGE
   ========================================================= */
.contact{background:radial-gradient(760px 520px at 96% 6%,rgba(200,168,120,.16),rgba(200,168,120,0) 70%),var(--anthracite);padding-block:var(--pad) clamp(72px,7vw,104px)}
.contact__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(40px,6vw,96px);align-items:center}
.contact__info .h2{max-width:13ch}
.contact__info .lead{margin-top:22px;max-width:42ch}
.contact__list{margin-top:40px;display:grid;gap:18px}
.contact__list li{display:flex;gap:16px;align-items:center}
.contact__badge{flex:none;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.06);border:1px solid var(--line-dark);color:var(--champagne)}
.contact__badge .icon{width:21px;height:21px}
.contact__label{display:block;font-size:.88rem;color:var(--on-dark-soft)}
.contact__list a{font-weight:600;font-size:1.1rem;text-decoration:none;line-height:1.4}
.contact__list a:hover{text-decoration:underline;text-underline-offset:4px}

.form-card{background:#fff;color:var(--ink);border-radius:30px;padding:clamp(26px,3.4vw,44px);box-shadow:0 54px 100px -44px rgba(0,0,0,.8)}
.form__title{font-size:clamp(1.5rem,1.1rem + .9vw,2rem);letter-spacing:-.025em}
.form__sub{margin-top:8px;color:var(--ink-soft);font-size:.97rem}
.form{margin-top:28px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:7px;min-width:0}
.field--full{grid-column:1/-1}
.field label{font-weight:600;font-size:.93rem}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:1rem;color:var(--ink);padding:14px 16px;border-radius:14px;
  border:1px solid rgba(33,31,29,.14);background:var(--lin);transition:border-color .2s,box-shadow .2s,background-color .2s;
}
.field select{appearance:none;-webkit-appearance:none;padding-right:44px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23211f1d' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;background-size:18px}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--champagne);background-color:#fff;box-shadow:0 0 0 4px rgba(200,168,120,.22)}
.consent{grid-column:1/-1;display:flex;gap:12px;align-items:flex-start;font-size:.92rem;line-height:1.5;color:var(--ink-soft)}
.consent input{flex:none;width:20px;height:20px;margin:2px 0 0;accent-color:var(--anthracite)}
.form .btn{grid-column:1/-1;justify-self:start}
.form__status{grid-column:1/-1;padding:16px 18px;border-radius:14px;background:var(--sable);color:var(--ink);font-weight:550}

.site-footer{background:var(--anthracite);color:var(--on-dark-soft)}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-top:clamp(56px,6vw,88px);border-top:1px solid var(--line-dark)}
.footer__brand img{height:56px;width:auto;filter:brightness(0) invert(1);opacity:.94}
.footer__brand p{margin-top:22px;max-width:36ch;font-size:.97rem}
.footer__title{font-size:1rem;letter-spacing:0;color:var(--on-dark);margin-bottom:18px}
.site-footer ul{display:grid;gap:10px}
.site-footer a{text-decoration:none;transition:color .2s}
.site-footer a:hover{color:var(--on-dark)}
.footer__bottom{margin-top:clamp(52px,6vw,84px);padding-block:22px;border-top:1px solid var(--line-dark);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;font-size:.9rem}
.footer__bottom ul{display:flex;flex-wrap:wrap;gap:8px 24px}

/* Barre d'action mobile */
.mobile-cta{
  position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:40;display:none;grid-template-columns:auto 1fr;gap:8px;padding:7px;border-radius:999px;
  background:rgba(33,31,29,.9);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 18px 40px -18px rgba(0,0,0,.55);
  transform:translateY(160%);transition:transform .45s var(--ease);
}
.mobile-cta.is-visible{transform:none}
.mobile-cta .btn{min-height:50px}
.mobile-cta .btn:hover{transform:none}
.mobile-cta__call{width:50px;padding:0;background:rgba(255,255,255,.08);color:var(--on-dark);border-color:var(--line-dark)}
.mobile-cta__call .icon{width:20px;height:20px}

/* =========================================================
   APPARITIONS AU DÉFILEMENT
   ========================================================= */
.about,.realisations{--cover:var(--lin)}
.domaines{--cover:var(--anthracite)}
.savoirs{--cover:var(--sable)}
.methode{--cover:var(--anthracite-2)}
/* Rideau qui se lève sur les photos */
.js [data-reveal]::before{content:"";position:absolute;inset:0;z-index:5;pointer-events:none;background:var(--cover,var(--lin));transform-origin:50% 0;transition:transform 1.25s var(--ease) var(--d,0s)}
.js [data-reveal].is-in::before{transform:scaleY(0)}
/* Montée douce des cartes */
.js [data-rise]{opacity:0;translate:0 28px;transition:opacity .9s var(--ease) var(--d,0s),translate .9s var(--ease) var(--d,0s)}
.js [data-rise].is-in{opacity:1;translate:0 0}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1240px){
  .header-phone span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .header-phone{width:48px;padding:0;justify-content:center}
}
@media (max-width:1080px){
  .nav,.header-actions{display:none}
  .header-bar{justify-content:space-between}
  .header-tools{display:flex}
  .facts__card{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:22px}
  .facts__item:nth-child(3){border-left:0}
  .footer__grid{grid-template-columns:1fr 1fr}
  .values{grid-template-columns:1fr;max-width:560px}
}
@media (max-width:900px){
  :root{--r-sheet:30px}
  .site-header{top:10px}
  .header-bar{height:60px;padding:0 7px 0 18px}
  .brand img{height:34px}

  .hero{grid-template-columns:1fr;min-height:0}
  .hero__content{padding:112px var(--gutter) 40px}
  .hero__title{max-width:15ch}
  .hero__media{min-height:0;height:clamp(340px,86vw,580px);margin-left:var(--gutter)}
  .hero__media::before{display:none}
  .hero__visual{border-radius:clamp(90px,24vw,170px) 0 0 0}
  .hero__control{right:14px;bottom:calc(48px + 16px);gap:10px;padding-left:16px}
  .facts{margin-top:-48px}

  .section-head{grid-template-columns:1fr}
  .realisations__more{justify-self:start}
  .about__grid,.savoirs__grid,.methode__grid,.faq__grid,.contact__grid{grid-template-columns:1fr}
  .about__media{max-width:520px}
  .about__chip{left:8px}
  .dgrid{grid-template-columns:1fr}
  .dcard{height:clamp(480px,120vw,620px)}
  .dcard:nth-child(2){margin-top:0}

  .savoirs__visual{display:none}
  .savoirs__list{
    display:grid;grid-auto-flow:column;grid-auto-columns:min(80%,340px);gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--gutter);
    margin-inline:calc(-1 * var(--gutter));padding:6px var(--gutter) 22px;scrollbar-width:thin;
  }
  .savoir,.savoir.is-active{scroll-snap-align:start;background:#fff;box-shadow:var(--shadow-1);overflow:hidden;display:flex;flex-direction:column}
  .savoir__thumb{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
  .savoir__btn{padding:18px 20px 6px;cursor:default;pointer-events:none}
  .savoir__ring{display:none}
  .savoir__title{opacity:1;font-size:1.32rem}
  .js .savoir__desc{grid-template-rows:1fr}
  .savoir__desc p{padding:0 20px 22px;font-size:.98rem}

  .methode__intro{position:static}
  .methode__grid{align-items:start}

  .projects{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:clamp(200px,42vw,320px)}
  .project:nth-child(1){grid-column:span 2;grid-row:span 1}
  .project:nth-child(n+2){grid-column:span 1}

  .faq__intro{position:static}
  .faq__a p{padding-right:26px}
}
@media (max-width:760px){
  .mobile-cta{display:grid}
  body{padding-bottom:84px}
}
@media (max-width:640px){
  .hero__caption{display:none}
  .facts__card{grid-template-columns:1fr;padding:22px 6px}
  .facts__item,.facts__item:nth-child(3){border-left:0}
  .facts__item + .facts__item{border-top:1px solid var(--line);padding-top:18px}
  .about__tiles{grid-template-columns:1fr}
  .dcard{height:auto;display:flex;flex-direction:column;background:var(--anthracite-2)}
  .dcard > img{position:relative;inset:auto;height:280px}
  .dcard__panel{position:relative;left:auto;right:auto;bottom:auto;margin:-56px 12px 12px;padding:22px 20px;background:rgba(33,31,29,.78)}
  .steps{grid-template-columns:1fr}
  .step:nth-child(even){margin-top:0}
  .projects{
    grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:84%;grid-template-rows:340px;grid-auto-rows:340px;
    gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--gutter);
    margin-inline:calc(-1 * var(--gutter));padding:4px var(--gutter) 22px;scrollbar-width:thin;
  }
  .project:nth-child(n){grid-column:auto;grid-row:auto;scroll-snap-align:start}
  .project .round-icon{opacity:1;transform:none}
  .logo-tile{width:140px;height:100px}
  .value{padding:14px 16px 14px 14px}
  .value__swatch{width:64px;height:64px}
  .form{grid-template-columns:1fr}
  .form .btn{width:100%}
  .footer__grid{grid-template-columns:1fr}
  .hero__actions .btn{flex:1 1 220px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;transition-delay:0s !important}
  .js [data-reveal]::before{display:none}
  .js [data-rise]{opacity:1;translate:none}
  .marquee__track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}
  .marquee__track [aria-hidden="true"]{display:none}
  .marquee{-webkit-mask-image:none;mask-image:none}
}