body {
    margin : 0;
    overflow: hidden;
    padding: 0;
    font-family: "Linux Libertine", Georgia, "Times New Roman", serif;
    line-height: 1.6;
    background: #fff;
    color: #202122;
}

#back-button {
    position: fixed;      /* reste visible même quand on scroll */
    top: 20px;            /* distance du haut */
    left: 20px;           /* distance de la gauche */
    background-color: #f8f9fa;
    color: #0645ad;
    padding: 8px 12px;
    text-decoration: none;
    border: 1px solid #aaa;
    border-radius: 4px;
    font-size: 0.9em;
    font-weight: bold;
    z-index: 1000;        /* au-dessus des images flottantes */
    box-shadow: 1px 1px 4px rgba(0,0,0,0.2);
    transition: background-color 0.2s;
}

#back-button:hover {
    background-color: #e2e6ea;
}


#container img{
    position: absolute;
    width: 60px;
    cursor: grab;
}
#container img:active{
    cursor: grabbing;
}

#content {
    max-width: 800px;
    margin: 20px auto 50px auto; /* 120px pour laisser zone libre en haut */
    padding: 0 20px;
}

/* Titres */
h1 {
    font-size: 2em;
    margin-bottom: 0.5em;
}

h2 {
    font-size: 1.5em;
    margin-top: 2em;
    margin-bottom: 0.5em;
}

/* Paragraphes */
p {
    margin: 1em 0;
}

/* Listes */
ul {
    margin: 1em 0 1em 2em;
}

/* Liens */
a {
    color: #0645ad;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}