* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial;
    background-color: #f5f7fb;
    color: #1b1f2a;
    line-height: 1.6;
}


a {
    color: #1e3a8a;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    background-color: #1e3a8a;
    color: #ffffff;
    padding: 18px 20px;
}

header a {
    color: #ffffff;
    font-weight: bold;
}

header h1 {
    margin: 8px 0 10px;
}

header>h1 {
    text-align: center;
}

header nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

header nav li {
    display: inline-block;
    margin-right: 10px;
    margin-bottom: 8px;
}

header nav a {
    display: inline-block;
    background-color: #ffffff;
    color: #1e3a8a;
    padding: 7px 10px;
    border-radius: 6px;
    font-weight: bold;
}

header nav a:hover {
    background-color: #c7d2fe;
    text-decoration: none;
}

#nav-secondaire {
    left: 4px;
    top: 200px;
    position: fixed;
    width: 170px;
}

#nav-secondaire nav ul {
    text-decoration: none;
    list-style: none;
    padding: 0;
}

/* Pour que le contenu ne passe pas sous la nav verticale */
main {
    margin: 0 180px;
    /* largeur nav + marge */
}

section,
aside {
    background-color: #ffffff;
    padding: 18px 20px;
    margin-bottom: 18px;
    border-radius: 8px;
    border-left: 5px solid #1e3a8a;
}

section h2,
aside h2 {
    margin-top: 0;
    color: #1e3a8a;
}

aside {
    background-color: #f2f5ff;
    border-left-color: #4338ca;
}


.important {
    font-weight: bold;
    color: #111827;
    background-color: #eef2ff;
    padding: 10px 12px;
    border-left: 4px solid #4338ca;
    border-radius: 6px;
}

figure {
    margin: 14px auto;
    text-align: center;
}

img {
    display: block;
    margin: 0 auto;
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 6px;
}

figcaption {
    font-size: 0.9em;
    color: #4b5563;
    margin-top: 6px;
}

ul li,
ol li {
    margin-bottom: 6px;
}

footer {
    background-color: #1f3c88;
    color: #ffffff;
    margin-top: 40px;
    padding: 20px 0;
}

footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

footer li {
    font-size: 0.9rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 6px;
}

caption {
    caption-side: top;
    text-align: left;
    font-weight: bold;
    color: #1e3a8a;
    margin-bottom: 8px;
}

th,
td {
    border: 1px solid #cbd5e1;
    padding: 10px;
    text-align: left;
    vertical-align: top;
}

th {
    background-color: #1e3a8a;
    color: white;
}

#presentation {
    scroll-margin-top: 120px;
}

header {
    position: relative;
}

header a.logo {
    position: absolute;
    top: 10px;
    right: 10px;
    display: inline-block;
}

header a.logo img {
    width: 70px;
    height: auto;
    border-radius: 0;
    display: block;
}

#retour {
    text-align: center;
    margin-top: 30px;
}

#retour a {
    display: inline-block;
    padding: 8px 14px;
    background-color: #1e3a8a;
    color: white;
    border-radius: 6px;
    font-size: 0.9rem;
}


@media (max-width: 700px) {

    header nav li,
    .menu-secondaire li {
        display: block;
        margin-right: 0;
    }

    img {
        max-width: 100%;
    }

    footer li {
        display: block;
        margin: 6px 0;
    }
}