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

header {
    background-color: #333;
    color: #fff;
    padding: 10px;
    text-align: left;
}

   ul {
        list-style: ;

    }

    li {
        margin: 1px;
        padding: 10px;
    }
    
nav {
    ul {
        list-style: none;
        padding: 0;
        display: flex;
        justify-content: center;
        background-color: #444;
        margin: 0;
    }

    li {
        margin: 1px;
        padding: 10px;
    }

    a {
        text-decoration: none;
        color: #fff;
    }
}

main {
    padding: 20px;
}

section {
    color: #000;
    background-color: #444;
    padding: 20px;
    margin: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: left;
    padding: 10px;
    background-color: #333;
    color: #fff;
}