body {
    font-family: Arial, sans-serif;
    background-color: #f6f8f9;
}
h1 {
    text-align: center;
    color: #2c3e50;
}
.bloc {
    padding: 15px;
    margin-bottom: 20px;
    border-left: 5px solid #3498db;
}
h2 {
    margin-top: 0;
}
p {
    line-height: 1.5;
}
#fiche_de_revision_nsi {
    background-color: #fffefe;
    width: 700px;
    margin: 0 auto;
}
#image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 3px solid #5749eb;
}
#en-tete {
    align-items: center;
    margin-left: 200px;
    display: flex;
    justify-content: space-between;
}