:root{
  --bg:#0b0c10;
  --bg2:#11131a;
  --text:#f2f3f5;
  --muted:#b7bcc8;
  --line:rgba(255,255,255,.08);
  --radius:18px;
  --max:1100px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:linear-gradient(180deg,var(--bg),#07070a);
  color:var(--text);
}

a{color:inherit;text-decoration:none}
p{line-height:1.6;color:var(--muted)}
h1,h2,h3{margin:0 0 10px 0; line-height:1.15}
main{padding-top:80px}

.header{
  position:fixed; inset:0 0 auto 0;
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 22px;
  background:rgba(11,12,16,.7);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  z-index:10;
}
.logo{font-weight:700; letter-spacing:.3px}
.nav{display:flex; gap:14px; align-items:center}
.nav a{padding:8px 10px; border-radius:12px}
.nav a:hover{background:rgba(255,255,255,.06)}

.btn{
  display:inline-block;
  padding:10px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.10);
  color:var(--text);
}
.btn:hover{background:rgba(255,255,255,.16)}
.btn--ghost{background:transparent}

.section{padding:70px 22px}
.section--alt{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section__head{
  max-width:var(--max);
  margin:0 auto 26px auto;
}

.hero{
  max-width:var(--max);
  margin:0 auto;
  padding:40px 22px 10px 22px;
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:22px;
  align-items:stretch;
}
.kicker{letter-spacing:.2em; text-transform:uppercase; font-size:.8rem}
.sub{max-width:52ch}

.hero__cta{display:flex; gap:12px; margin-top:16px; flex-wrap:wrap}
.hero__image{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:radial-gradient(circle at 30% 20%, rgba(255,255,255,.12), transparent 40%),
             radial-gradient(circle at 70% 70%, rgba(255,255,255,.08), transparent 45%),
             rgba(255,255,255,.04);
  min-height:240px;
  display:grid;
  place-items:center;
}

.placeholder{
  color:rgba(255,255,255,.55);
  border:1px dashed rgba(255,255,255,.25);
  padding:18px;
  border-radius:14px;
}

.grid{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:16px;
}

.card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(255,255,255,.03);
  overflow:hidden;
  cursor:pointer;
  transition: transform .15s ease, background .15s ease;
}
.card:hover{transform: translateY(-2px); background:rgba(255,255,255,.05)}
.card__media{height:190px; background:rgba(255,255,255,.02)}
.card__media img{width:100%;height:100%;object-fit:cover;display:block}
.card__body{padding:14px 14px 16px 14px}
.card__body p{margin:6px 0 0 0}

.features{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:16px;
}
.feature{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px;
  background:rgba(255,255,255,.03);
}

.about{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns: .9fr 1.1fr;
  gap:18px;
  align-items:center;
}
.about__media{
  border:1px solid var(--line);
  border-radius:var(--radius);
  min-height:260px;
  background:rgba(255,255,255,.03);
  display:grid;
  place-items:center;
}
.list{margin:14px 0 0 0; padding-left:18px}
.list li{margin:8px 0; color:var(--muted)}

.contact{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns: .9fr 1.1fr;
  gap:16px;
  align-items:start;
}
.form{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px;
  background:rgba(255,255,255,.03);
  display:grid;
  gap:12px;
}
label{display:grid; gap:6px; color:var(--muted)}
input, textarea{
  width:100%;
  padding:10px 12px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.25);
  color:var(--text);
}
.small{font-size:.9rem}

.footer{
  padding:34px 22px;
  border-top:1px solid var(--line);
  text-align:center;
  color:var(--muted);
}

/* Pages projet */
.project-hero{
  max-width: var(--max);
  margin: 0 auto 18px auto;
  border:1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  background: rgba(255,255,255,.03);
}
.project-hero img{width:100%; height:520px; object-fit:cover; display:block;}

.project-meta{
  max-width: var(--max);
  margin: 0 auto 18px auto;
  display:grid;
  grid-template-columns: .9fr 1.1fr;
  gap:16px;
}
.meta{
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding:16px;
  background: rgba(255,255,255,.03);
}

.gallery{
  max-width: var(--max);
  margin: 0 auto;
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:16px;
}
.gallery figure{
  margin:0;
  border:1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  background: rgba(255,255,255,.03);
}
.gallery img{width:100%; height:320px; object-fit:cover; display:block;}

.project-nav{
  max-width: var(--max);
  margin: 26px auto 0 auto;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.related{
  max-width: var(--max);
  margin: 18px auto 0 auto;
}
.related h3{margin:0 0 10px 0;}
.related-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:16px;
}

/* Lightbox */
.lightbox{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.92);
  display:none;
  justify-content:center;
  align-items:center;
  z-index:999;
  padding:20px;
}
.lightbox.active{display:flex;}
.lightbox img{
  max-width:95%;
  max-height:90%;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.15);
  object-fit:contain;
}
.lightbox__close{
  position:absolute;
  top:18px;
  right:18px;
  font-size:22px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.15);
  color:white;
  border-radius:14px;
  padding:8px 12px;
  cursor:pointer;
}
.lightbox__close:hover{background:rgba(255,255,255,.18);}

/* Responsive */
@media (max-width: 860px){
  .hero{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  .features{grid-template-columns:1fr}
  .about{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .project-hero img{height:320px;}
  .project-meta{grid-template-columns:1fr;}
  .gallery{grid-template-columns:1fr;}
  .gallery img{height:260px;}
  .related-grid{grid-template-columns:1fr;}
  .project-nav{justify-content:flex-start;}
}