body {
font-family: Arial, sans-serif;
text-align: center;
background-color: #f0f0f0;
padding: 20px;
}
video {
margin-bottom: 20px;
}
ul {
list-style-type: none;
padding: 0;
}
li {
margin: 10px 0;
cursor: pointer;
}
li.active {
font-weight: bold;
color: blue;
}