body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    padding: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#menu-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s, box-shadow 0.3s;
}

nav ul li a:hover {
    background-color: #555;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

nav ul li a:active {
    background-color: #444;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

main {
    padding: 2rem;
}

section {
    margin-bottom: 2rem;
}

h2 {
    border-bottom: 2px solid #333;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

/* Responsive design */
@media (max-width: 768px) {
    #menu-toggle {
        display: block;
    }

    nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        text-align: center;
    }

    nav ul li {
        margin: 0.5rem 0;
    }

    nav ul.active {
        display: flex;
    }
}