header {
    font-size: 2em;
}

footer {
    display:block;
    position:absolute;
    top: 95%;
    height: 9px;
    margin-top: -0.5em;
}

body {
    font-family: Arial;
    text-align: center;
    background: #e9e9e9;
}

.taille-1 {
    font-size: 1.5em;
}

.frame-fullscreen {
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    border: none;
    padding: 0;
    overflow: hidden;
    position: fixed;
    z-index: 999;
}