html {
    background-image: url('fond.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
}

body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: rgba(245, 245, 245, 0.92);
    color: #222;
    min-height: 100vh;
}

header {
    text-align: center;
}

h1, h2 {
    color: #c0392b;
}

a {
    color: #c0392b;
}

section {
    display: none;
}

section:target {
    display: block;
}

main:not(:has(:target)) section:first-of-type {
    display: block;
}

nav summary {
    cursor: pointer;
    font-weight: bold;
    font-size: 18px;
}

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

nav li {
    margin: 6px 0;
}

nav a {
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

img, iframe {
    max-width: 100%;
}

.lecteur {
    border: 1px solid #999;
    padding: 10px;
    text-align: center;
}

.lecteur img {
    width: 120px;
}

.flash {
    fill: #ff4d4d;
}