body, html {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-color: #f4f4f4;
}

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: #fff;
    color: #000;
    padding: 20px;
    border-right: 1px solid #ddd;
}

.sidebar .logo h2 {
    margin-top: 0;
}

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

.sidebar nav ul li a {
    display: block;
    padding: 10px;
    color: #000;
    text-decoration: none;
    margin-bottom: 10px;
    border-radius: 5px;
}

.sidebar nav ul li a:hover {
    background-color: #f4f4f4;
    box-shadow: 0 0 5px #d4af37;
}

.sidebar nav ul li a.active {
    background-color: #f4f4f4;
    box-shadow: 0 0 5px #d4af37;
    font-weight: bold;
}

.main-content {
    flex-grow: 1;
    padding: 20px;
}

header h1 {
    margin-top: 0;
}