:root {
    --bg-main: #f0f4f8;        /* Gris-bleu très pâle */
    --bg-card: #ffffff;        /* Cartes blanches nettes */
    --border-color: #cbd5e1;   /* Séparations nettes */
    --primary: #10b981;
    --primary-hover: #059669;
    --text-main: #1e293b;      
    --text-muted: #64748b;     
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

header {
    background-color: #000000;
    border-bottom: 1px solid #1e293b; /* bordure sombre discrète */
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 700;
}

.logo span {
    color: var(--primary);
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--primary);
}

main {
    flex: 1;
    padding: 2.5rem 0;
    /* Un voile sombre très léger (30%) pour garder la clarté d'origine */
    background-image: linear-gradient(rgba(15, 23, 42, 0.3), rgba(15, 23, 42, 0.3)), url('/bg-main.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.hero {
    text-align: center;
    padding: 3rem 1rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    background-color: var(--primary);
    color: #0f172a;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 3rem 0;
}

.card {
    background-color: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.card h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-muted);
    line-height: 1.5;
}

.contact-section {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
    margin: 2rem auto;
    border: 1px solid var(--border-color);
}

.contact-section h2 {
    margin-bottom: 1.2rem;
    color: var(--text-main);
}

.contact-form label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.6rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-main);
    color: var(--text-main);
}

footer {
    background-color: #000000;
    border-top: 1px solid #1e293b;
    padding: 1.2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}