* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: #16263b;
    background-color: #f4f7fa;
}

a {
    color: #1d4f91;
}

img, video, audio {
    display: block;
    width: 100%;
}


header {
    padding: 50px 20px 30px 20px;
    color: white;
    background-color: #0070c4;
}

.titre, nav {
    max-width: 760px;
    margin: 0 auto;
}

h1 {
    margin: 0;
    font-family: Arial, sans-serif;
    font-size: 90px;
    line-height: 1;
}

.formation {
    margin: 10px 0 0 0;
}

.devise {
    margin: 25px 0 0 0;
    font-size: 28px;
    font-style: italic;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 5px 25px;
    margin: 35px auto 0 auto;
    padding: 0;
    list-style-type: none;
}

nav a {
    color: white;
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 50px 0;
    border-bottom: 1px solid #c5d3e2;
}

h2 {
    margin: 0 0 20px 0;
    font-family: Arial, sans-serif;
    font-size: 44px;
    line-height: 1.1;
    color: #1d4f91;
}

h3 {
    margin: 25px 0 5px 0;
    font-size: 20px;
}

article p {
    margin-top: 5px;
}

.legende, figcaption {
    font-size: 15px;
    color: #55677b;
}

figure {
    margin: 0;
}

figcaption {
    padding-top: 8px;
}

.citation {
    padding-left: 15px;
    border-left: 4px solid #0070c4;
    font-style: italic;
}

.jauge {
    background-color: #dfe8f1;
}

.niveau {
    padding: 4px 10px;
    color: white;
    font-weight: 600;
    background-color: #0070c4;
}

.n87 { width: 87%; }
.n80 { width: 80%; }
.n77 { width: 77%; }
.n70 { width: 70%; }
.n67 { width: 67%; }
.n40 { width: 40%; }
.n33 { width: 33%; }

.deux-colonnes {
    display: flex;
    gap: 40px;
}

.deux-colonnes .texte {
    flex-grow: 1;
}

.deux-colonnes .texte p:first-child {
    margin-top: 0;
}

.deux-colonnes figure {
    width: 240px;
    flex-shrink: 0;
}


.galerie {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.galerie figure {
    width: 50%;
}

details {
    margin-bottom: 10px;
    padding: 15px 20px;
    background-color: #dfe8f1;
}

summary {
    font-weight: 600;
    cursor: pointer;
}

footer {
    padding: 30px 20px;
    text-align: center;
    font-size: 15px;
    color: #55677b;
}

@media screen and (max-width: 40em) {
    h1 {
        font-size: 60px;
    }

    .deux-colonnes, .galerie {
        flex-direction: column;
    }

    .galerie figure {
        width: 100%;
    }
}