body {
    background: #333333;
    padding: 0;
}

header {
    text-align: center;
    margin-bottom: 2em;
}

header > h1 {
    margin-top: 0;
}

h2 {
    margin: 0 0 1em 0;
    color: #7f0000;
}

.h5 {
    margin: 0 0 1em 0;
    color: #7f0000;
}

.lang-menu {
    position: absolute;
    top: 5px;
    margin-left: 10px;
}

article #content {
    margin-bottom: 2em;
}

article dd {
    margin-bottom: .5em;
}

article ul {
    margin-bottom: 2em;
}

article h4 {
    margin-top: 0;
    margin-bottom: .5em;
}

.navbar {
    margin-bottom: 0;
}

#site {
    width: 100%;
    background: white;
    margin-left: auto;
    margin-right: auto;
    padding-top: 20px;
}

#content {
    background: white;
    top: 0;
    margin-left: auto;
    margin-right: auto;
    padding: 30px;
    width: 100%;
}


.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8em;
    position: absolute;
    top: 0.6em;
    right: 1em;
    cursor: pointer;
    line-height: 1;
}


/* center navigation bar for medium or large devices */
@media (min-width: 768px) {
    .navbar-nav {
        width: 100%;
        text-align: center;
    }
    
    .navbar-nav > li {
        float: none;
        display: inline-block;
    }
    
    .navbar-nav > li.navbar-right {
        float: right !important;
    }
    
    #site {
        width: 90%;
    }

    #content {
        width: 70%;
        top: -11em;
    }
}

@media (max-width: 768px) {
    /* Afficher le bouton hamburger uniquement sur petit écran */
    .menu-toggle {
        display: block; 
        top: 0.2em;
        right: 1em;
    }

    .navbar-nav {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        background: white;
        position: absolute;
        top: 3.2em;
        left: 0;
        right: 0;
        border-top: 1px solid #ddd;
        padding: 1em;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .navbar-nav.open {
        display: flex;
    }

    .navbar-nav li {
        margin: 0.5em 0;
    }
}

div .algo {
    font-family: Monospace;
    border: 1px solid #999999;
    background-color: #F0F0F0;
    padding-left: 5px;
}

div .solution {
    /* font-family: Monospace; */
    display: none;
    border: 1px solid #999999;
    background-color: #FEFEFE;
    padding-left: 5px;
}

img .displayed {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: auto;
    max-width: 50%;
}