html,body{
    width: 100%;
    height: 100%;
    margin: 0;
    margin: 0;
    background-image: url('images/bg.jpg');
    font-family: "Poppins", sans-serif; /*see emebd code in HTML from google fonts*/
}

main {
    width: 70%;
    max-width: 640px;
    min-width: 600px;
    min-height: 100%;
    border: .2em solid LightSlateGray;
    margin: auto;
    background-color: WhiteSmoke;
    padding: 1em 2em;
}

main nav {
    background-color: DarkGray;
    border: .2em solid DarkSlateGray;
}


main nav ul {
    
    display: flex;
    padding: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}
main nav ul li {
    margin: 0 1em 
}

main nav ul li a {
    padding: 0 1em;
    color: black;
    text-decoration: none;
}
main nav ul li a:hover {
    background-color: LightGray;
}
section {
 
}

section img {
    margin: 1em;
    border: 1px solid LightGray;
}

pre {
    background-color: white;
    padding: 1em;
    border: .2em solid LightGray;
    font-size: 110%;
}
code {
    font-family: monospace;
}

.highlight {
    background-color: white;
    padding: 1em;
    border: .2em solid LightGray;
    font-size: 110%;
    font-weight: bold;
}