:root{
  --porcelain:#f8f5ef;
  --porcelain-deep:#efe8d8;
  --gold:#c9a227;
  --gold-deep:#8a6b15;
  --gold-pale:#f4e8c4;
  --clay:#c97a4a;
  --grout:#79705f;
  --ink:#1b1712;
  --line:rgba(27,23,18,0.12);
  --radius:2px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--porcelain);
  color:var(--ink);
  font-family:'IBM Plex Sans',sans-serif;
  font-size:16px;
  line-height:1.6;
  overflow-x:hidden;
}
h1,h2,.brand-name{font-family:'DM Serif Display',serif;font-weight:400;letter-spacing:-0.01em;}
a{color:inherit;text-decoration:none;}
svg{display:block;}
.wrap{max-width:1120px;margin:0 auto;padding:0 32px;}
a:focus-visible, button:focus-visible{outline:2px solid var(--gold-deep);outline-offset:3px;}

/* HEADER */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(20,17,13,0.97);
  backdrop-filter:blur(6px);
  border-bottom:1px solid rgba(255,255,255,0.08);
}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:98px;gap:1.2rem;}
.brand{display:flex;align-items:center;height:100%;}
.brand img{height:92px;width:auto;display:block;}
nav{display:flex;gap:2.2rem;}
nav > .btn{display:none;}
nav a{font-size:0.92rem;font-weight:500;color:rgba(248,245,239,0.75);transition:color .15s ease;position:relative;}
nav a:hover{color:var(--gold);}
nav a[aria-current="page"]{color:var(--gold);}
nav a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-28px;height:2px;background:var(--gold);}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;background:transparent;border:none;cursor:pointer;padding:0;margin-left:auto;
}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;transition:transform .2s ease, opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.btn{
  display:inline-block;background:var(--gold);color:var(--ink);font-weight:600;font-size:0.9rem;
  padding:0.7rem 1.4rem;border-radius:var(--radius);border:1px solid var(--gold);
  transition:background .15s ease, transform .1s ease;
}
.btn:hover{background:var(--gold-pale);border-color:var(--gold-pale);transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--grout);}
.btn-outline:hover{border-color:var(--gold-deep);color:var(--gold-deep);}

/* HOME HERO SLIDESHOW */
.hero-slideshow{position:relative;height:100vh;min-height:560px;overflow:hidden;background:#0f0c09;}
.hero-slideshow .slide{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;animation:heroFade 42s infinite;
}
.hero-slideshow .slide:nth-child(1){animation-delay:0s;}
.hero-slideshow .slide:nth-child(2){animation-delay:6s;}
.hero-slideshow .slide:nth-child(3){animation-delay:12s;}
.hero-slideshow .slide:nth-child(4){animation-delay:18s;}
.hero-slideshow .slide:nth-child(5){animation-delay:24s;}
.hero-slideshow .slide:nth-child(6){animation-delay:30s;}
.hero-slideshow .slide:nth-child(7){animation-delay:36s;}
@keyframes heroFade{
  0%{opacity:0;transform:scale(1.06);}
  4%{opacity:1;}
  12%{opacity:1;transform:scale(1.12);}
  16%{opacity:0;transform:scale(1.12);}
  100%{opacity:0;}
}
.hero-slideshow .slide{transition:none;}
.hero-overlay{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg, rgba(10,8,6,0.4) 0%, rgba(10,8,6,0.1) 30%, rgba(8,6,4,0.75) 100%);
}
.hero-content{position:relative;z-index:2;height:100%;display:flex;align-items:flex-end;padding:6.5rem 0 4.5rem;}
.hero-content .eyebrow{color:var(--gold-pale);font-size:0.82rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:1.1rem;}
.hero-content h1{font-size:clamp(2.6rem,6vw,4.6rem);line-height:1.06;max-width:16ch;color:#fff;text-shadow:0 2px 24px rgba(0,0,0,0.3);}
.hero-content h1 em{font-style:normal;color:var(--gold-pale);}
.hero-content p.lead{margin-top:1.5rem;font-size:1.1rem;color:rgba(248,245,239,0.92);max-width:44ch;}
.hero-content .cta-row{margin-top:2.2rem;display:flex;gap:1rem;flex-wrap:wrap;}
.hero-content .btn-outline{border-color:rgba(255,255,255,0.55);color:#fff;}
.hero-content .btn-outline:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,0.08);}
.hero-dots{position:absolute;z-index:2;bottom:1.6rem;left:0;right:0;display:flex;justify-content:center;gap:0.5rem;}
.hero-dots span{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,0.35);}
@media (max-width:640px){
  .hero-slideshow{height:88vh;}
  .hero-content{padding:4rem 0 3rem;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
  .hero-slideshow .slide{animation:none !important;opacity:0;}
  .hero-slideshow .slide:first-child{opacity:1;}
}

/* PAGE HERO (sous-pages) */
.page-hero{background:var(--ink);color:#fff;padding:5rem 0 3.4rem;}
.page-hero .eyebrow{color:var(--gold);font-size:0.82rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:0.9rem;display:block;}
.page-hero h1{font-size:clamp(2.2rem,4vw,3.2rem);color:#fff;}
.page-hero p{color:rgba(248,245,239,0.82);margin-top:1rem;max-width:56ch;font-size:1.05rem;}

section{padding:5.5rem 0;}
.section-head{max-width:52ch;margin-bottom:3rem;}
.section-head .eyebrow{color:var(--gold-deep);font-size:0.8rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:0.7rem;display:block;}
.section-head h2{font-size:clamp(1.8rem,3vw,2.4rem);color:var(--ink);}
.section-head p{color:var(--grout);margin-top:0.9rem;}

/* PRODUITS / PRESTATIONS */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.service{background:var(--porcelain);padding:2rem 1.7rem;}
.service svg{width:34px;height:34px;color:var(--gold-deep);margin-bottom:1.1rem;}
.service h3{font-size:1.05rem;color:var(--ink);margin-bottom:0.5rem;font-weight:600;}
.service p{font-size:0.92rem;color:var(--grout);}

/* FEATURE SPLIT (texte + photo) */
.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center;}
.feature-media{aspect-ratio:4/3;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);}
.feature-media img{width:100%;height:100%;object-fit:cover;display:block;}
.feature-text{max-width:50ch;}
.feature-text .eyebrow{color:var(--gold-deep);font-size:0.8rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;margin-bottom:0.7rem;display:block;}
.feature-text h2{font-size:clamp(1.6rem,2.6vw,2.1rem);color:var(--ink);margin-bottom:1rem;}
.feature-text p{color:var(--grout);}
.feature-text p + p{margin-top:0.9rem;}

/* METHODE */
.methode{background:var(--gold-pale);}
.steps{display:grid;grid-template-columns:repeat(4,1fr);position:relative;}
.steps::before{content:"";position:absolute;top:22px;left:0;right:0;height:1px;background:rgba(138,107,21,0.25);}
.step{padding-right:1.6rem;position:relative;}
.step .num{
  font-family:'DM Serif Display',serif;font-size:1rem;color:#fff;background:var(--gold-deep);
  width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  position:relative;z-index:2;margin-bottom:1.2rem;
}
.step h3{font-size:1rem;color:var(--ink);margin-bottom:0.5rem;}
.step p{font-size:0.9rem;color:var(--grout);}

/* REALISATIONS - galerie photo */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem;}
.gallery.gallery-large{grid-template-columns:repeat(3,1fr);gap:1.4rem;}
.swatch{aspect-ratio:4/3;border-radius:var(--radius);display:flex;align-items:flex-end;padding:1rem;position:relative;overflow:hidden;border:1px solid var(--line);background:var(--porcelain-deep);}
.swatch span{font-size:0.85rem;font-weight:600;color:#fff;background:rgba(27,23,18,0.6);padding:0.3rem 0.6rem;border-radius:2px;position:relative;z-index:1;}
.swatch img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;transition:transform .5s ease;}
.swatch:hover img{transform:scale(1.06);}

/* CONFIANCE */
.confiance{display:grid;grid-template-columns:1.1fr 1fr;gap:4rem;align-items:center;}
.confiance ul{list-style:none;}
.confiance li{display:flex;gap:0.9rem;padding:1.1rem 0;border-bottom:1px solid var(--line);}
.confiance li:first-child{border-top:1px solid var(--line);}
.confiance li svg{width:22px;height:22px;color:var(--gold-deep);flex-shrink:0;margin-top:2px;}
.confiance li strong{display:block;color:var(--ink);font-size:0.98rem;}
.confiance li span{color:var(--grout);font-size:0.9rem;}
.confiance figure{background:#fff;border:1px solid var(--line);padding:2.4rem;border-radius:var(--radius);}
.confiance figure .big{font-family:'DM Serif Display',serif;font-size:3rem;color:var(--gold-deep);}
.confiance figure p{color:var(--grout);margin-top:0.4rem;font-size:0.92rem;}
.confiance figure hr{border:none;border-top:1px solid var(--line);margin:1.6rem 0;}

/* CONTACT */
.contact{background:var(--ink);color:var(--porcelain);}
.contact .eyebrow{color:var(--gold);}
.contact h2{color:#fff;}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;}
.coord dl{display:grid;grid-template-columns:auto 1fr;gap:0.6rem 1rem;margin-top:1.6rem;}
.coord dt{color:#b8a878;font-size:0.85rem;text-transform:uppercase;letter-spacing:0.06em;}
.coord dd{color:var(--porcelain);font-weight:500;}
form{display:flex;flex-direction:column;gap:1rem;}
form label{font-size:0.85rem;color:#b7aa8c;margin-bottom:0.35rem;display:block;}
form input, form textarea{
  width:100%;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.16);
  color:var(--porcelain);padding:0.75rem 0.9rem;border-radius:var(--radius);font-family:inherit;font-size:0.95rem;
}
form input:focus, form textarea:focus{border-color:var(--gold);outline:none;}
form textarea{min-height:110px;resize:vertical;}
form button{align-self:flex-start;margin-top:0.4rem;border:none;cursor:pointer;font-family:inherit;background:var(--gold);color:var(--ink);}
form button:hover{background:var(--gold-pale);}

footer{padding:2.4rem 0;border-top:1px solid var(--line);}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;}
footer p{color:var(--grout);font-size:0.85rem;}
footer .flinks{display:flex;gap:1.6rem;}
footer .flinks a{color:var(--grout);font-size:0.85rem;}
footer .flinks a:hover{color:var(--gold-deep);}

@media (max-width:900px){
  header > .wrap > .btn{display:none;}
  .nav-toggle{display:flex;}
  nav{
    display:flex;flex-direction:column;gap:0;
    position:absolute;top:100%;left:0;right:0;
    background:rgba(20,17,13,0.98);
    border-bottom:1px solid rgba(255,255,255,0.08);
    max-height:0;overflow:hidden;transition:max-height .25s ease;
  }
  nav.open{max-height:400px;}
  nav a{padding:1rem 32px;border-top:1px solid rgba(255,255,255,0.08);}
  nav a[aria-current="page"]::after{display:none;}
  nav > .btn{display:inline-block;margin:1rem 32px 1.4rem;align-self:flex-start;}
  .grid-4{grid-template-columns:1fr 1fr;}
  .grid-3{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;row-gap:2.2rem;}
  .steps::before{display:none;}
  .confiance, .contact-grid{grid-template-columns:1fr;gap:2.5rem;}
  .feature-split{grid-template-columns:1fr;gap:1.8rem;}
  .feature-split .feature-media{order:-1;}
  .feature-text{max-width:none;}
  .gallery, .gallery.gallery-large{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .grid-4{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .gallery, .gallery.gallery-large{grid-template-columns:1fr;}
  .wrap{padding:0 20px;}
}