body {
    font-family: sans-serif;
    display: flex;
}
.sidebar {
    width: 200px;
    background: #eee;
    padding: 10px;
}
.sidebar ul {
    list-style: none;
    padding: 0;
}
.sidebar li {
    margin: 10px 0;
}
.content {
    padding: 20px;
}