.sidebar {
    width: 200px;
    background-color: #f2f2f2;
    height: 100%;
    position: fixed;
    left: 0;
    top: 0;
    padding: 20px;
}

.sidebar h3 {
    margin-top: 0;
}

.sidebar ul {
    margin: 0;
    padding: 0;
}

.sidebar li {
    list-style: none;
    margin: 10px 0;
}

.sidebar li a {
    text-decoration: none;
    color: #333;
}

.sidebar li a:hover {
    color: #007bff;
}
