header
{
    text-align: center;
}

ul
{
    list-style: none;
    padding-left: 0px;
    text-align: center;
}

li
{
    border-bottom: 3px solid blue;
}

img
{
    max-width: 100%;
    max-height: 40em;
    height: auto;
}

article
{
    background-color: antiquewhite;
    max-width: 100%;
    max-height: 40em;
    height: auto;
}

article h2
{
    padding: 5%;
}
article p
{
    padding: 5%;
}

footer
{
    font-size: 80%;
    text-align: center;

}

@media screen and (min-width: 600px)
{
    nav ul {
        display: flex;
        flex-wrap: nowrap;
        justify-content: space-around;
        border-bottom: 3px solid blue;
    }

    li{
        border: none;
    }

    main{
        display: flex;
    }

    article{
        box-shadow: 5px 5px black;
        border-radius: 15px;
    }
}