/* RESET & BASICS */
:root {
    --primary: #2563eb; /* Bleu pro */
    --secondary: #1e293b; /* Gris sombre */
    --accent: #f59e0b; /* Orange action */
    --light: #f8fafc;
    --text: #334155;
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text);
    line-height: 1.6;
    background-color: #fff;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* UTILS */
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.btn {
    display: inline-block;
    padding: 10px 25px;
    background: var(--primary);
    color: white;
    border-radius: 5px;
    font-weight: bold;
    transition: 0.3s;
}
.btn:hover { background: var(--secondary); }

/* HEADER */
header { background: white; box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
nav { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); }
.nav-links { display: flex; gap: 20px; }
.nav-links a:hover { color: var(--primary); }

/* HERO SECTION */
.hero {
    background: linear-gradient(to right, var(--secondary), var(--primary));
    color: white;
    padding: 80px 0;
    text-align: center;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 15px; }
.hero p { font-size: 1.2rem; margin-bottom: 25px; opacity: 0.9; }
.hero .btn { background: var(--accent); color: var(--secondary); }

/* SERVICES GRID */
.services-section { padding: 60px 0; background: var(--light); }
.section-title { text-align: center; margin-bottom: 40px; color: var(--secondary); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}
.card:hover { transform: translateY(-5px); }
.card h3 { margin-bottom: 15px; color: var(--primary); }

/* PAGE SERVICE DETAIL */
.service-detail { padding: 60px 0; }
.service-content { max-width: 800px; margin: 0 auto; }
.service-content h2 { color: var(--primary); margin-top: 30px; margin-bottom: 15px; }

/* CONTACT FORM */
.contact-form { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 15px; }
input, textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}
textarea { height: 150px; resize: vertical; }

/* FOOTER */
footer { background: var(--secondary); color: white; text-align: center; padding: 20px 0; margin-top: 60px; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav-links { display: none; } /* Pour simplifier, menu burger à ajouter si besoin */
    .hero h1 { font-size: 2rem; }
}