:root {
    --vlb-gris-bleu: #8b94a3;
    --vlb-text-dark: #1a1a1a;
    --vlb-bg-light: #fbfbfc;
    --vlb-vert: #b0d4c1;
    --white: #ffffff;
}

* { box-sizing: border-box; }

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--vlb-bg-light);
    color: var(--vlb-text-dark);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- EFFETS DE FOND (Aquarelles) --- */
.tache-fond {
    position: fixed;
    z-index: -1;
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.4;
    pointer-events: none;
}
.tache-1 { width: 600px; height: 600px; background-image: url('../image/1.png'); top: -150px; left: -200px; }
.tache-2 { width: 500px; height: 500px; background-image: url('../image/2.png'); bottom: -100px; right: -150px; }
.tache-3 { width: 400px; height: 400px; background-image: url('../image/3.png'); top: 40%; right: 5%; opacity: 0.15; }

/* --- NAVIGATION --- */
header {
    background-color: var(--vlb-gris-bleu);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo { font-size: 1.5rem; font-weight: bold; letter-spacing: 2px; }
.nav-links a {
    color: var(--white);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover { color: var(--vlb-vert); }

/* --- STRUCTURE PRINCIPALE --- */
main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 10;
}

/* --- HERO SECTION (Bannière d'accueil) --- */
.hero {
    text-align: center;
    padding: 60px 20px;
    margin-bottom: 50px;
}
.hero h1 {
    color: var(--vlb-gris-bleu);
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 15px;
}
.hero p {
    font-size: 1.2rem;
    color: #555;
    max-width: 600px;
    margin: 0 auto 30px auto;
    line-height: 1.6;
}

/* --- BOUTONS --- */
.btn-primary {
    display: inline-block;
    background: var(--vlb-gris-bleu);
    color: white;
    padding: 15px 35px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(139, 148, 163, 0.4);
}
.btn-primary:hover {
    background: var(--vlb-vert);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(176, 212, 193, 0.6);
}

/* --- CARTES (Design "Glassmorphism" de ta DA) --- */
.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
@media (max-width: 768px) { .grid { grid-template-columns: 1fr; } }

.card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border-top: 6px solid var(--vlb-vert);
    text-align: center;
    transition: transform 0.3s;
}
.card:hover { transform: translateY(-5px); }
.card h2 { color: var(--vlb-gris-bleu); margin-top: 0; }
.card i { font-size: 2.5rem; color: var(--vlb-vert); margin-bottom: 15px; }
.card ul { text-align: left; margin: 20px 0; padding-left: 20px; color: #555; line-height: 1.8; }

/* --- FORMULAIRE --- */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: left;
    margin-top: 20px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.form-group label {
    font-weight: bold;
    color: var(--vlb-gris-bleu);
}
.form-group input, .form-group select, .form-group textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    background: #fff;
    transition: border 0.3s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--vlb-vert);
    box-shadow: 0 0 5px rgba(176, 212, 193, 0.5);
}
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}
.checkbox-group input {
    width: 20px;
    height: 20px;
    accent-color: var(--vlb-vert);
}