.sidebar {
    float: left;
    width: 15%;
    background-color: #f0f0f0;
    padding: 20px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}

.sidebar h2 {
    font-size: 18px;
    margin-bottom: 10px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    text-decoration: none;
}