body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f8ff;
    color: #333;
}

header {
    background-color: #1e90ff;
    color: white;
    text-align: center;
    padding: 1em;
}

nav {
    background-color: #4169e1;
    padding: 0.5em;
}

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

        nav ul li {
            margin: 0 1em;
        }

            nav ul li a {
                color: white;
                text-decoration: none;
            }

main {
    max-width: 800px;
    margin: 2em auto;
    padding: 0 1em;
}
footer {
    background-color: #4169e1;
    color: white;
    text-align: center;
    padding: 1em;
    /* position: fixed;*/
    /*  bottom: 0;*/
    width: 100%;
}