body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#08111f;
    color:#fff;
}

.container{
width:90%;
max-width:1200px;
margin:auto;
}

.hero{
    padding:180px 0;
    background:
    linear-gradient(
        rgba(8,17,31,.75),
        rgba(8,17,31,.75)
    ),
    url('assets/images/hero-chantier.jpg');

    background-size:cover;
    background-position:center;
    color:#fff;
    text-align:center;
}

.hero h1{
font-size:60px;
}

.btn-primary{
background:#a6c84c;
padding:18px 30px;
color:white;
text-decoration:none;
border-radius:8px;
display:inline-block;
margin-top:20px;
}

.hero,
.services,
.why-us,
.realisations,
.zone,
.contact{
    background:#08111f;
    color:#fff;
	padding:60px 0;
}

.grid{
display:grid;
grid-template-columns:repeat(4,1fr);
gap:30px;
}

.card{
    background:#16233d;
    padding:40px;
    border-radius:15px;
    border:1px solid rgba(255,255,255,.08);
    transition:.3s;
}

.card:hover{
    transform:translateY(-8px);
}

.card h3{
    font-size:28px;
    margin-bottom:20px;
}

.gallery{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:30px;
}

.gallery img{
    width:100%;
    height:350px;
    object-fit:cover;
    border-radius:15px;
    transition:.3s;
}

.gallery img:hover{
    transform:scale(1.03);
}

.zone{
padding:80px 0;
text-align:center;
background:#08111f;
color:white;
}


/* HEADER */

.site-header{
    background:#ffffff;
    position:sticky;
    top:0;
    z-index:999;
    box-shadow:0 2px 15px rgba(0,0,0,.08);
}

.header-container{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:90px;
}

.logo img{
    max-height:70px;
    width:auto;
    display:block;
}

.main-nav ul{
    display:flex;
    gap:40px;
    list-style:none;
    margin:0;
    padding:0;
}

.main-nav li{
    list-style:none;
}

.main-nav a{
    text-decoration:none;
    color:#1f2937;
    font-weight:600;
    transition:.3s;
}

.main-nav a:hover{
    color:#a6c84c;
}

.header-cta{
    background:#a6c84c;
    color:#fff;
    text-decoration:none;
    padding:14px 24px;
    border-radius:8px;
    font-weight:700;
    transition:.3s;
}

.header-cta:hover{
    transform:translateY(-2px);
}

/* RESPONSIVE */

@media(max-width:900px){

    .header-container{
        flex-direction:column;
        padding:20px 0;
        gap:20px;
    }

    .main-nav ul{
        flex-direction:column;
        align-items:center;
        gap:15px;
    }

    .grid{
        grid-template-columns:1fr;
    }

    .gallery{
        grid-template-columns:1fr;
    }

    .hero h1{
        font-size:42px;
    }

}


.why-us h2,
.services h2,
.realisations h2,
.zone h2,
.contact h2{
    text-align:center;
    margin-bottom:50px;
}

.hero-text{
    max-width:800px;
    margin:20px auto;
    font-size:22px;
    line-height:1.7;
}

.zone p,
.contact p{
    text-align:center;
    font-size:18px;
}

.contact{
    text-align:center;
}

body{
    font-size:18px;
    line-height:1.6;
}

.container{
    width:90%;
    max-width:1400px;
    margin:auto;
}

.hero h1{
    font-size:72px;
    font-weight:700;
    line-height:1.1;
    margin-bottom:30px;
}

.hero p{
    font-size:24px;
    max-width:900px;
    margin:0 auto 40px;
}

h2{
    font-size:42px;
    margin-bottom:50px;
}
.footer-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:60px;
}

@media (max-width: 768px){

    .site-header{
        padding:10px 0;
    }

    .header-container{
        flex-direction:column;
        gap:10px;
        min-height:auto;
    }

    .logo img{
        max-height:70px;
    }

    .main-nav ul{
        display:flex;
        flex-wrap:wrap;
        justify-content:center;
        gap:10px 15px;
    }

    .main-nav a{
        font-size:14px;
    }

    .header-cta{
        padding:10px 15px;
        font-size:14px;
    }

    .hero{
        padding:100px 0;
    }

    .hero h1{
        font-size:36px;
    }

    .hero p{
        font-size:18px;
    }

    .grid{
        grid-template-columns:1fr;
    }

    .gallery{
        grid-template-columns:1fr;
    }

    .footer-grid{
        grid-template-columns:1fr;
        text-align:center;
    }

}