body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    font-size: 28px;
    border-bottom: 2px solid #333;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h2 {
    font-size: 24px;
    margin-top: 30px;
    margin-bottom: 10px;
}

h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

p {
    font-size: 16px;
    margin-bottom: 20px;
}

a {
    text-decoration: none;
    color: #1a73e8;
}

.sommaire {
    font-size: x-small;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ol {
    counter-reset: item;
    padding-left: 0;
}

ol > li {
    list-style: none;
}

ol ol {
    margin-bottom: 15px;
}

ol > li::before {
    counter-increment: item;
    content: counters(item, ".") ". ";
    font-weight: bold;
}