*,
    *>* {
        box-sizing: border-box;
    }

    body {
        display: flex;
        flex-direction: column;
        flex-wrap: wrap;
        gap: 5rem;
        justify-content: center;
    }

    main,
    header {
        width: 90%;
        margin-left: auto;
        margin-right: auto;
    }

    h2,
    footer {
        text-align: center;
    }

    nav {
        padding: 2rem;
        border-radius: 5px;
    }

    nav>ul {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        align-content: center;
        align-items: center;
        justify-content: space-evenly;
        gap: 1rem;
        height: 95%;
    }

    nav li {
        list-style-type: none;
        background-color: white;
        width: 25%;
        border-radius: 5px;
        box-shadow: 3px 3px 5px rgba(0, 0, 0, .3);
    }

    nav li:hover {
        box-shadow: 1px 1px 3px rgba(0, 0, 0, .3);
    }

    nav>ul a {
        display: block;
        text-decoration: none;
        border: 2px solid blue;
        padding: 1rem;
        height: 100%;
        width: 100%;
    }

    picture img {
        display: block;
        width: 100%;
    }

    @media screen and (max-width:1325px) {

        main,
        header {
            width: 100%;
        }

        nav>ul {
            flex-direction: column;
        }

        nav li {
            width: 100%;
        }
    }