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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

/* Layout commun */
.container {
    width: 90%;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 5rem 0;
}

/* Header & Navigation */
header {
    background-color: #2c3e50;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a:hover {
    color: #3498db;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #3498db;
    transition: all 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Sections communes */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    display: inline-block;
    position: relative;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #3498db;
}

/* Bouton commun */
.btn {
    display: inline-block;
    background-color: #3498db;
    color: #fff;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center; 
}
.btn:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#center-div {
    display: block;
    margin: 2rem auto 0;
    max-width: 200px;
}

/* Section Accueil */
#accueil {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: #fff;
    text-align: center;
    padding: 8rem 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.5rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Section À propos */
.about-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.about-text, .about-image {
    flex: 1;
    font-size: 1.2em;
}

.about-image {
    text-align: center;
}

.about-image img {
    width: 300px;
    height: 400px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    object-fit: cover;
}

/* Section Veille */
#veille {
    background-color: #ecf0f1;
}

.veille-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.veille-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.veille-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.veille-image {
    height: 200px;
    overflow: hidden;
}

.veille-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.veille-card:hover .veille-image img {
    transform: scale(1.1);
}

.veille-content {
    padding: 1.5rem;
}

.veille-content h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.veille-content p {
    margin-bottom: 1rem;
    color: #666;
}

.veille-date {
    color: #999;
    font-size: 0.9rem;
}

/* Section Contact */
.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    background: #3498db;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Footer */
footer {
    background: #2c3e50;
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #3498db;
    transform: translateY(-3px);
}