body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: lightslategray;
}

.video-container {
    margin-top: 20px;
    width: 80%;
    max-width: 800px;
}

video {
    width: 100%;
    height: auto;
}




.chapitres {
    text-decoration: none;
    padding: 10px;
    font-family: arial;
    font-size: 1em;
    color: #000000;
    background-color: #ff0000;
    border-radius: 24px;
    -webkit-border-radius: 24px;
    -moz-border-radius: 24px;
    border: 4px solid #0f243e;
    box-shadow: 3px 3px 12px #444444;
    -webkit-box-shadow: 3px 3px 12px #444444;
    -moz-box-shadow: 3px 3px 12px #444444;
    }
    
    
    .chapitres:hover {
    padding: 10px;
    color: #FFFFFF;
    background-color: #899F11;
    border: 4px solid #FFFFFF;
    box-shadow: 1px 1px 4px #777777;
    -webkit-box-shadow: 1px 1px 4px #777777;
    -moz-box-shadow: 1px 1px 4px #777777;
    }