/* Reinitialisation de base */
* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #ffffff;
    color: #444444;
    font-family: Arial, Helvetica, sans-serif;
}

.bandeau-superieur {
    height: 100px;
    background-color: #ffffff;
    display: flex;
    align-items: flex-start;
}

.logo {
    height: 100px;
    width: auto;
    display: block;
}

.contenu-principal {
    flex: 1;
    padding: 20px;
    background-color: #ffffff;
    color: #444444;
}

.contenu-principal h1 {
    text-align : center;
    font-size : 1.5em;
    color: #3f3f3f;
}

.contenu-principal p {
    text-align : center;
    color: #444444;
    line-height: 1.6;
}

.bandeau-inferieur {
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
}

.image-bandeau {
    width: 500px;
    height: 100px;
    display: block;
    object-fit: contain;
}

a {
text-decoration : none;
}

.petit {
font-size: 70%;
font-style: italic;
}