:root{
  --primary:#ff7a00; /* orange */
  --secondary:#0b5fa5; /* bleu */
  --text:#1b1b1b;
  --muted:#6b7280;
  --bg:#ffffff;
  --alt:#f6f8fb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg);scroll-behavior:smooth}
img{max-width:100%;display:block}
a{color:var(--secondary);text-decoration:none}
.container{width:min(1100px,92%);margin:0 auto}

.site-header{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,.95);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid #eaeef3;z-index:1000}
.header-inner{display:flex;align-items:center;gap:18px;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#111}
.brand-logo{width:42px;height:42px;object-fit:cover;border-radius:10px;border:2px solid var(--secondary)}
.brand-name{letter-spacing:.2px}
.nav{display:flex;gap:18px;margin-left:auto}
.nav a{padding:8px 10px;border-radius:10px}
.nav a:hover{background:#eef5ff}
.btn-call{margin-left:8px;background:var(--primary);color:#fff;padding:10px 14px;border-radius:12px;font-weight:700}

.section{padding:90px 0}
.section.alt{background:var(--alt)}
.section-title{font-size:32px;margin:0 0 20px 0}
.section-intro{color:var(--muted);margin-top:-10px;margin-bottom:24px}

.hero{height:90vh;min-height:520px;background:url('./images/facade.jpg') center/cover no-repeat;position:relative;margin-top:64px}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.35),rgba(0,0,0,.35))}
.hero-content{position:relative;color:#fff;text-align:left;padding-top:18vh}
.hero h1{font-size:38px;line-height:1.1;margin:0 0 10px 0}
.subtitle{font-size:20px;opacity:.95;margin:0 0 24px 0}
.hero .btn{margin-right:10px}

.grid{display:grid;gap:20px}
.services{grid-template-columns:repeat(4,1fr)}
.gallery{grid-template-columns:repeat(4,1fr)}
.contact-grid{grid-template-columns:1.2fr .8fr}
.card{background:#fff;border:1px solid #eaeef3;border-radius:16px;padding:18px;box-shadow:0 4px 12px rgba(10,31,68,.04)}
.card h3{margin-top:0}
.btn{display:inline-block;padding:12px 16px;border-radius:12px;font-weight:700;border:2px solid transparent}
.btn.primary{background:var(--primary);color:#fff}
.btn.outline{border-color:#fff;color:#fff;background:transparent}
.btn.outline:hover{background:rgba(255,255,255,.12)}

.gal-item{border-radius:14px;overflow:hidden;border:1px solid #eaeef3}
.gal-item img{transition:transform .3s ease}
.gal-item:hover img{transform:scale(1.05)}

.map-wrap{border-radius:16px;overflow:hidden;border:1px solid #eaeef3}

.site-footer{padding:30px 0;border-top:1px solid #eaeef3;background:#fff;text-align:center;color:var(--muted)}

.fab-call{position:fixed;right:16px;bottom:16px;background:var(--primary);color:#fff;padding:12px 16px;border-radius:999px;font-weight:800;z-index:900;box-shadow:0 10px 20px rgba(255,122,0,.25)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* Responsive */
@media (max-width: 1024px){
  .services,.gallery{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width: 720px){
  .nav{display:none}
  .services,.gallery{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:30px}
  .subtitle{font-size:18px}
  .btn-call{display:none}
}
@media (max-width: 460px){
  .services,.gallery{grid-template-columns:1fr}
}