body {
    display: flex;
    background-color: #121212;
    color: #e0e0e0;
    font-family: 'Roboto', sans-serif;
    margin: 0;
}

.sidebar {
    width: 300px;
    padding: 20px;
    background-color: #1f1f1f;
    height: 100vh;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.5);
}

.sidebar h2 {
    text-align: center;
    color: #90caf9;
    margin-bottom: 30px;
}

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

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    color: #e0e0e0;
    text-decoration: none;
    font-size: 1.1em;
    display: block;
    padding: 10px 15px;
    border-radius: 5px;
}

.sidebar ul li a:hover {
    background-color: #333;
    color: #90caf9;
}

.main-content {
    flex-grow: 1;
    padding: 40px;
    background-color: #121212;
}

h1 {
    text-align: center;
    color: #90caf9;
    font-size: 2.5em;
    margin-bottom: 30px;
}

.container {
    background-color: #1f1f1f;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    max-width: 1200px;
    margin: auto;
}