:root{
    --bleu:#003366;
    --bleu-clair:#005ea8;
    --fond:#f5f7fa;
    --gris:#6b7280;
    --blanc:#ffffff;
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial, Helvetica, sans-serif;
    background:var(--fond);
    color:#222;
    line-height:1.6;
}

header{
    background:white;
    padding:50px 20px;
    text-align:center;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
}

header img{
    width:140px;
    margin-bottom:20px;
}

h1{
    color:var(--bleu);
    font-size:2.3rem;
    margin-bottom:15px;
}

.sous-titre{
    max-width:800px;
    margin:auto;
    font-size:1.1rem;
    color:#444;
}

.hero-buttons{
    margin-top:30px;
}

.btn{
    display:inline-block;
    text-decoration:none;
    padding:14px 26px;
    border-radius:8px;
    font-weight:bold;
    transition:.3s;
    margin:6px;
}

.btn-primary{
    background:var(--bleu);
    color:white;
}

.btn-primary:hover{
    background:var(--bleu-clair);
}

.btn-secondary{
    background:white;
    border:2px solid var(--bleu);
    color:var(--bleu);
}

section{
    max-width:1200px;
    margin:auto;
    padding:60px 20px;
}

.section-title{
    text-align:center;
    color:var(--bleu);
    margin-bottom:40px;
}

.features{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:25px;
}

.feature{
    background:white;
    padding:25px;
    border-radius:12px;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
}

.feature h3{
    color:var(--bleu);
    margin-bottom:10px;
}

.demo-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(350px,1fr));
    gap:30px;
}

.demo-card{
    background:white;
    border-radius:12px;
    overflow:hidden;
    box-shadow:0 2px 10px rgba(0,0,0,.08);
}

.demo-card img{
    width:100%;
    display:block;
}

.demo-card h3{
    padding:15px 20px 5px;
    color:var(--bleu);
}

.demo-card p{
    padding:0 20px 20px;
}

.notice{
    background:#fff7e6;
    border-left:6px solid #f0a500;
    padding:25px;
    border-radius:10px;
}

.documents{
    display:flex;
    justify-content:center;
    gap:20px;
    flex-wrap:wrap;
}

.doc-card{
    width:250px;
    background:white;
    text-align:center;
    padding:25px;
    border-radius:12px;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
    text-decoration:none;
    color:inherit;
}

.doc-card img{
    width:70px;
    margin-bottom:10px;
}

footer{
    background:white;
    text-align:center;
    padding:40px 20px;
    margin-top:50px;
}

footer img{
    width:180px;
    margin-bottom:20px;
}

.credit{
    color:#666;
}

@media(max-width:768px){

h1{
    font-size:1.8rem;
}

}