* {
    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: #f4f4f4;
}

/* Navigation */
nav {
    background: #2c3e50;
    padding: 1rem 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    transition: background 0.3s ease;
}

nav a:hover {
    background: #34495e;
}

/* Menu déroulant pour "Accueil" */
nav li {
    position: relative;
}

nav li ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #2c3e50;
    min-width: 200px;
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

nav li:hover>ul {
    display: block;
    opacity: 1;
    visibility: visible;
}

nav li ul li {
    width: 100%;
}

nav li ul a {
    display: block;
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav li ul a:hover {
    background: #34495e;
}

nav li ul li:last-child a {
    border-bottom: none;
}

/* Section principale */
section {
    max-width: 900px;
    margin: 60px auto;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
}

section h1 {
    font-size: 2.8em;
    color: #2c3e50;
    margin-bottom: 20px;
}

section p {
    font-size: 1.3em;
    color: #555;
    margin-bottom: 30px;
}

section img {
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* Footer */
footer {
    background-color: #333;
    color: white;
    padding: 10px 0;
    text-align: center;
    position: absolute;
    bottom: 0;
    width: 100%;
}