body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    color: #333;
    text-align: center;
}
    header {
        text-align: center;
        padding: 2em 0;
        background-color: #ffffff; 
        color: #000000;
    }
    header h1 {
        font-size: 2.5em;
        font-weight: bold;
        margin: 0;
    }
    h2 {
        font-size: 2em;
        font-weight: bold;
        margin-top: 30px;
        margin-bottom: 15px;
    }
    
    h3 {
        font-size: 1.5em;
        font-weight: bold;
        margin-top: 20px;
        margin-bottom: 10px;
    }
    p {
        font-size: 1em;
        line-height: 1.6;
        text-align: justify;
        margin-bottom: 20px;
    }
    ul {
        list-style-type: none;
        padding: 0;
    }
    
    ul li {
        margin: 10px 0;
    }
    a {
        color: #000000;
        text-decoration: none;
        font-weight: bold;
    }
    
    a:hover {
        text-decoration: underline;
    }