/* ============================================================
   BATIMOE — feuille de style
   Identité : crème / charbon / cuivre · serif élégant + sans moderne
   Signature : la ligne de faîtage (double pignon) reprise du logo
   ============================================================ */

:root{
  --paper:#F5F0E7;        /* fond papier */
  --paper-2:#FBF8F1;      /* cartes / surfaces claires */
  --ink:#23211F;          /* charbon — texte & sections sombres */
  --ink-2:#2B2825;        /* charbon légèrement plus clair */
  --ink-soft:#5A534B;     /* texte secondaire */
  --copper:#B16A2E;       /* cuivre — accent */
  --copper-deep:#90521F;
  --sand:#E5D8C4;         /* sable — filets / fonds doux */
  --line:rgba(35,33,31,.13);
  --line-strong:rgba(35,33,31,.24);
  --shadow:0 1px 2px rgba(35,33,31,.05), 0 12px 30px -18px rgba(35,33,31,.28);
  --r:14px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Cormorant Garamond", Georgia, serif;
  --sans:"Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ---------- Layout helpers ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}
section{padding-block:clamp(64px,9vw,116px)}
section[id]{scroll-margin-top:84px}
.section-head{max-width:660px;margin-bottom:clamp(34px,5vw,56px)}
.section-head.center{margin-inline:auto;text-align:center}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.72rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--copper-deep);margin:0 0 18px;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:var(--copper);opacity:.7;
}
.center .eyebrow{justify-content:center}

h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.04;letter-spacing:-.01em;margin:0}
h2.title{font-size:clamp(2.1rem,4.6vw,3.35rem);font-weight:500}
h3{font-size:1.35rem;font-weight:600}
.lead{font-size:clamp(1.05rem,2vw,1.22rem);color:var(--ink-soft);line-height:1.6}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--sans);font-size:.95rem;font-weight:600;letter-spacing:.01em;
  padding:.85em 1.5em;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),background .25s,color .25s,border-color .25s;
}
.btn svg{width:1.05em;height:1.05em}
.btn-primary{background:var(--copper-deep);color:#fff}
.btn-primary:hover{background:#794518;transform:translateY(-2px)}
.btn-ghost{border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-light{border-color:rgba(255,255,255,.4);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.1);border-color:#fff;transform:translateY(-2px)}

/* ---------- Logo / mark ---------- */
.brand{display:inline-flex;align-items:center}
.brand .logo{height:50px;width:auto;display:block;transition:height .35s var(--ease)}
.site-header.scrolled .brand .logo{height:40px}
/* bascule du logo selon le fond : clair sur fond sombre, foncé sur fond clair */
.brand .logo-dark{display:none}
.brand .logo-light{display:block}
.site-header.scrolled .brand .logo-light{display:none}
.site-header.scrolled .brand .logo-dark{display:block}
.solid-header .site-header .brand .logo-light{display:none}
.solid-header .site-header .brand .logo-dark{display:block}
.site-footer .brand .logo{height:58px}

/* ---------- Header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:50;
  display:flex;align-items:center;
  padding:16px 0;transition:background .35s,box-shadow .35s,padding .35s;
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px}
.site-header.scrolled{
  background:rgba(245,240,231,.86);backdrop-filter:blur(12px);
  box-shadow:0 1px 0 var(--line);padding:10px 0;
}
.nav{display:flex;align-items:center;gap:30px}
.nav a:not(.btn){font-size:.92rem;font-weight:500;color:var(--ink-soft);transition:color .2s;position:relative}
.nav a:not(.btn):hover{color:var(--ink)}
.nav a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-5px;height:1.5px;width:0;background:var(--copper);transition:width .28s var(--ease)}
.nav a:not(.btn):hover::after{width:100%}
.nav .btn{margin-left:6px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px;color:var(--ink)}
.nav-toggle svg{width:26px;height:26px}

/* header sitting over the hero starts transparent with light text */
.site-header:not(.scrolled) .nav a:not(.btn){color:rgba(255,255,255,.92)}
.site-header:not(.scrolled) .nav a:not(.btn):hover{color:#fff}
.site-header:not(.scrolled) .nav-toggle{color:#fff}
.site-header.scrolled .nav a:not(.btn){color:var(--ink-soft)}
/* on interior pages the header is always solid */
.solid-header .site-header{background:rgba(245,240,231,.92);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.solid-header .site-header .nav a:not(.btn){color:var(--ink-soft)}
.solid-header .site-header .nav-toggle{color:var(--ink)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:flex-end;color:#fff;overflow:hidden;padding-block:0}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;animation:slowzoom 18s var(--ease) both}
@keyframes slowzoom{from{transform:scale(1.08)}to{transform:scale(1)}}
@media (prefers-reduced-motion:reduce){.hero-bg img{animation:none}}
.hero::after{ /* legibility gradient */
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(20,18,16,.42) 0%,rgba(20,18,16,.18) 38%,rgba(20,18,16,.74) 100%);
}
.hero .wrap{padding-block:clamp(110px,16vh,170px) clamp(48px,8vh,90px)}
.hero-inner{max-width:760px}
.hero .eyebrow{color:#fff}
.hero .eyebrow::before{background:#fff;opacity:.85}
.hero h1{font-size:clamp(2.7rem,7.2vw,5.4rem);font-weight:500;color:#fff;margin-bottom:.32em}
.hero h1 em{font-style:italic;color:#F0C79A}
.hero .hero-sub{font-size:clamp(1.08rem,2.2vw,1.4rem);color:rgba(255,255,255,.9);max-width:560px;margin-bottom:2em;font-weight:300}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- Intro / value ---------- */
.intro{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(34px,5vw,72px);align-items:center}
.intro-figure{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/5}
.intro-figure img{width:100%;height:100%;object-fit:cover}
.intro-figure::after{content:"";position:absolute;inset:auto 0 0 0;height:38%;background:linear-gradient(to top,rgba(20,16,12,.62),rgba(20,16,12,0));pointer-events:none}
.intro-figure figcaption{z-index:1;
  position:absolute;left:18px;bottom:18px;right:18px;color:#fff;
  font-size:.82rem;letter-spacing:.04em;text-shadow:0 1px 8px rgba(0,0,0,.4);
}
.values{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:18px}
.values li{display:flex;gap:14px;align-items:flex-start}
.values .dot{flex:0 0 auto;margin-top:.32em;width:9px;height:9px;border-radius:50%;background:var(--copper)}
.values b{font-weight:600}
.single-line{
  margin-top:30px;padding:16px 22px;border-left:2px solid var(--copper);
  background:var(--paper-2);border-radius:0 10px 10px 0;font-family:var(--serif);
  font-size:1.35rem;line-height:1.3;color:var(--ink);
}

/* ---------- Expertises ---------- */
.expertise-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 26px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--sand)}
.card .ico{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;color:var(--copper);margin-bottom:14px}
.card .ico svg{width:30px;height:30px;display:block}
.card h3{margin-bottom:9px}
.card p{font-size:.95rem;color:var(--ink-soft);margin:0}

/* ---------- Process ---------- */
.process{background:var(--paper-2);border-block:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:0 clamp(40px,5vw,80px)}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}
.step .num{
  font-family:var(--serif);font-size:2rem;font-weight:500;line-height:1;
  color:var(--copper);min-width:1.6em;
}
.step h3{font-size:1.12rem;margin-bottom:5px}
.step p{font-size:.92rem;color:var(--ink-soft);margin:0}

/* ---------- Bénéfices (dark) ---------- */
.secure{background:var(--ink);color:var(--paper)}
.secure .eyebrow{color:#E0A368}
.secure .eyebrow::before{background:var(--copper)}
.secure h2.title{color:var(--paper)}
.secure-lead{color:rgba(245,240,231,.72);max-width:560px}
.secure-grid{margin-top:46px;display:grid;grid-template-columns:repeat(2,1fr);gap:2px 48px}
.secure-grid li{
  list-style:none;display:flex;align-items:center;gap:14px;
  padding:18px 0;border-bottom:1px solid rgba(245,240,231,.12);font-size:1.04rem;
}
.secure-grid .chk{flex:0 0 auto;width:24px;height:24px;color:var(--copper)}
.secure-grid .chk svg{width:100%;height:100%}

/* ---------- Réalisations teaser ---------- */
.real-teaser-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:1fr;gap:12px}
.real-teaser-grid a{position:relative;display:block;border-radius:12px;overflow:hidden;aspect-ratio:3/4}
.real-teaser-grid a:first-child{grid-column:span 2;grid-row:span 2;aspect-ratio:auto}
.real-teaser-grid img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.real-teaser-grid a:hover img{transform:scale(1.05)}

/* ---------- Équipe ---------- */
.team{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:820px}
.member{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);
  padding:30px;display:flex;gap:22px;align-items:center;
}
.member img{width:96px;height:96px;border-radius:50%;object-fit:cover;flex:0 0 auto;filter:grayscale(1) contrast(1.02)}
.member .role{color:var(--copper-deep);font-weight:600;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:6px}
.member h3{font-size:1.4rem;margin-bottom:10px}
.member .contact{display:grid;gap:5px;font-size:.9rem}
.member .contact a{color:var(--ink-soft);display:inline-flex;align-items:center;gap:8px}
.member .contact a:hover{color:var(--copper-deep)}
.member .contact svg{width:15px;height:15px;color:var(--copper);flex:0 0 auto}

/* ---------- Contact ---------- */
.contact{background:var(--paper-2);color:var(--ink);text-align:center;border-top:1px solid var(--line)}
.contact h2.title{color:var(--ink);max-width:680px;margin-inline:auto}
.contact .lead{color:var(--ink-soft);max-width:520px;margin:18px auto 34px}
.contact-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.contact .loc{margin-top:30px;font-size:.88rem;letter-spacing:.04em;color:var(--ink-soft)}

/* ---------- Réseaux sociaux ---------- */
.socials{display:flex;gap:12px;align-items:center}
.contact .socials{justify-content:center;margin-top:30px}
.socials a{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--ink-soft);
  transition:color .25s,border-color .25s,background .25s,transform .25s var(--ease);
}
.socials a:hover{color:#fff;background:var(--copper-deep);border-color:var(--copper-deep);transform:translateY(-2px)}
.socials svg{width:19px;height:19px}
.site-footer .socials a{display:grid;place-items:center;padding:0;border-color:rgba(245,240,231,.25);color:rgba(245,240,231,.78)}
.site-footer .socials a:hover{color:#fff;background:var(--copper);border-color:var(--copper)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-2);color:rgba(245,240,231,.7);padding-block:52px 30px;font-size:.9rem}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between;align-items:flex-start}
.site-footer .foot-tag{max-width:280px;margin-top:14px;line-height:1.5}
.foot-col h4{font-family:var(--sans);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(245,240,231,.5);margin:0 0 12px;font-weight:600}
.foot-col a{display:block;color:rgba(245,240,231,.78);padding:3px 0}
.foot-col a:hover{color:var(--paper)}
.foot-bottom{border-top:1px solid rgba(245,240,231,.12);margin-top:36px;padding-top:20px;font-size:.8rem;color:rgba(245,240,231,.45);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Page hero (réalisations) ---------- */
.page-hero{padding-top:clamp(130px,18vh,180px);padding-bottom:clamp(40px,6vw,68px);border-bottom:1px solid var(--line)}
.page-hero .lead{max-width:620px;margin-top:18px}
.page-hero .crumb{font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--copper-deep);font-weight:600;margin-bottom:18px}
.page-hero .crumb a{color:var(--ink-soft)}

/* ---------- Projets / galerie ---------- */
.project{padding-block:clamp(48px,7vw,84px);border-bottom:1px solid var(--line)}
.project-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:30px}
.project-head .meta{font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:var(--copper-deep);font-weight:600;margin-bottom:8px}
.project-head h2{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:500}
.project-head p{max-width:440px;color:var(--ink-soft);font-size:.96rem;margin:0}
.gallery{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}
.gallery figure{margin:0;overflow:hidden;border-radius:12px;cursor:zoom-in;position:relative}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.gallery figure:hover img{transform:scale(1.045)}
/* span helpers */
.g-7{grid-column:span 7}.g-5{grid-column:span 5}
.g-6{grid-column:span 6}.g-4{grid-column:span 4}.g-3{grid-column:span 3}.g-8{grid-column:span 8}
.g-12{grid-column:1 / -1}
.gallery figure.tall{aspect-ratio:3/4}
.gallery figure.wide{aspect-ratio:3/2}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;
  background:rgba(20,18,16,.92);padding:24px;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:8px;box-shadow:0 30px 80px -20px #000}
.lightbox .lb-close{position:absolute;top:20px;right:24px;background:none;border:0;color:#fff;cursor:pointer}
.lightbox .lb-close svg{width:30px;height:30px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- Focus ---------- */
:focus-visible{outline:2px solid var(--copper);outline-offset:3px;border-radius:4px}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:900px){
  .intro{grid-template-columns:1fr}
  .intro-figure{aspect-ratio:16/11;order:-1}
  .expertise-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr;gap:0}
  .secure-grid{grid-template-columns:1fr;gap:0}
  .real-teaser-grid{grid-template-columns:repeat(2,1fr)}
  .real-teaser-grid a:first-child{grid-column:span 2;grid-row:auto;aspect-ratio:16/10}
  .team{grid-template-columns:1fr;max-width:480px}
}
@media (max-width:680px){
  body{font-size:16px}
  .nav{
    position:fixed;inset:0 0 0 auto;width:min(82vw,320px);
    background:var(--paper-2);flex-direction:column;align-items:flex-start;
    justify-content:flex-start;gap:6px;padding:96px 30px 30px;
    transform:translateX(105%);transition:transform .4s var(--ease);
    box-shadow:-20px 0 50px -20px rgba(0,0,0,.3);z-index:60;
  }
  .nav.open{transform:none}
  .nav a:not(.btn){font-size:1.05rem;padding:10px 0;color:var(--ink-soft)!important;width:100%;border-bottom:1px solid var(--line)}
  .nav a:not(.btn)::after{display:none}
  .nav .btn{margin:14px 0 0;width:100%;justify-content:center}
  .nav-toggle{display:inline-flex;z-index:61}
  .site-header:not(.scrolled) .nav a:not(.btn){color:var(--ink-soft)!important}
  .expertise-grid{grid-template-columns:1fr}
  .member{flex-direction:column;text-align:center}
  .member .contact a{justify-content:center}
  .gallery [class*=g-]{grid-column:1/-1!important}
  .project-head{flex-direction:column;align-items:flex-start}
  .nav-backdrop{position:fixed;inset:0;background:rgba(20,18,16,.4);z-index:55;display:none}
  .nav-backdrop.open{display:block}
}