* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

html, body {
    height: 100%;
    background-color: #1f1f1f !important;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #1d1d1d;
    background-attachment: fixed;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px; /* Limite la largeur du contenu */
    display: flex;
    flex-direction: column;
    justify-content: flex-start; /* Centrer verticalement */
    align-items: center; /* Centrer horizontalement */
    padding: 20px;
}

header {
    background-color: #333;
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 10px 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-list li {
    margin: 0 20px;
}

.nav-list li a {
    text-decoration: none;
    color: white;
    font-size: 1.2em;
    transition: color 0.3s;
}

.nav-list li a:hover {
    color: #ffcc00;
}

/* Section principale */
main.contenu {
    margin-top: 70px; 
    width: 100%;
    /* max-width: 800px; */
    padding: 20px;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    text-align: center; /* Centrer le texte */
    z-index: 100;
}

h1 {
    font-size: 2.5em;
    color: #333;
}

h3 {
    font-size: 1.8em;
    color: #555;
}

p {
    font-size: 1.2em;
    color: #666;
}

img {
    width: 60%;
    margin-top: 20px;
}

.credits {
    margin-top: 20px;
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #ffcc00;
    color: #333;
    padding: 10px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.3);
    transition: background-color 0.3s;
}

.back-to-top:hover {
    background-color: #ff9900;
}

/* Styles responsive */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: #333;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-list li {
        text-align: center;
        margin: 10px 0;
    }

    .menu-toggle {
        display: flex;
    }
}