body {

    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;

}


header {

    background: #222;
    color: white;
    padding: 20px;
    text-align: center;

}


nav a {

    color: white;
    text-decoration: none;
    margin: 10px;

}


nav a:hover {

    text-decoration: underline;

}


main {

    padding: 30px;

}


section, article {

    margin-bottom: 20px;

}


form {

    max-width: 400px;

}


input, textarea {

    width: 100%;
    padding: 10px;
    margin: 10px 0;

}


button {

    padding: 10px 20px;
    cursor: pointer;

}


footer {

    background: #222;
    color: white;
    text-align: center;
    padding: 15px;

}