body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 2em;
    color: #333;
}

h2 {
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.5em;
    color: #333;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 5px;
}

p {
    margin-bottom: 15px;
    font-size: 1em;
    color: #666;
}

ul {
    margin-left: 20px;
    margin-bottom: 15px;
    color: #666;
}

li {
    margin-bottom: 10px;
}

ul ul {
    margin-left: 20px;
}

a {
    color: #007BFF;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.5em;
    }

    h2 {
        font-size: 1.2em;
    }

    ul {
        margin-left: 15px;
    }

    ul ul {
        margin-left: 15px;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 1.2em;
    }

    h2 {
        font-size: 1em;
    }
}