/* Réinitialisation de base pour les marges et le padding */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}

header {
    text-align: center;
    background: #ffffff;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-radius: 8px;
}

h1 {
    color: #333333;
    font-size: 24px;
}

p {
    color: #555555;
    font-size: 16px;
    margin-top: 10px;
}