@media(max-width:1000px) {
    nav {
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;

    }

    nav a {

        border: 2px solid turquoise;
        border-radius: 5px;
        background-color: aqua;
    }

    section {
        display: flex;
        flex-direction: column;
    }

    img {
        width: 30%;
        margin-left: 40%;
    }

    h1 {
        text-align: center;
    }

    body {
        background-color: aquamarine;
    }
}

@media (min-width:1001px) {
    nav {
        display: flex;
        flex-direction: row;
        justify-content: center;

    }

    nav a {
        text-decoration: none;
        padding: 3px;
        color: black;
        font-size: 19px;
        margin: 5px;
        border: 2px solid #00b7ff;
        border-radius: 5px;
        background-color: #DDF2FD;
        transition: 0.7s;
    }

    nav a:hover {

        border-color: rgb(136, 136, 203);
        transition: 0.7s;
    }

    body {
        background-image: url(Images1/footprints-309158_1280.png);
        background-color: paleturquoise;
        background-repeat: repeat-y;

    }

    h1 {
        text-align: center;
    }

    section {
        display: flex;
        flex-direction: row;
        justify-content: center;
    }

    section article {
        margin: 10px;
        width: 43%;
        border: 1px solid black;

    }

    img {
        max-width: 80%;
    }

    article img {
        margin-left: 10%;
        
    }
}