body {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

header {
    background-color: bisque;
    text-align: center;
    height: 60px;
    font-size: 2em;
}

main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

main img {
    width: 650px;
    height: auto;
    min-height: 300px;
    padding: 20px;
    padding-bottom: 40px;
    border: 1px solid gainsboro;
    -webkit-box-shadow: 0px 0px 29px 0px rgba(0, 0, 0, 0.75);
    -moz-box-shadow: 0px 0px 29px 0px rgba(0, 0, 0, 0.75);
    box-shadow: 0px 0px 29px 0px rgba(0, 0, 0, 0.75);
}

main nav{

}

main nav ul{
    list-style: none;
    padding: 0px;
    margin: 0px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

main nav ul li a{
    display: block;
    padding: 10px;
    margin: 15px;
    font-size: 2em;
    text-decoration: none;
    color: rgb(88, 88, 88);
}

@media (max-width: 670px) {
    main img {
        width:96%;
        height: auto;
        padding: 10px;
        padding-bottom: 20px;
    }
}