html {
    margin: 0;
    display: flex;
    flex-direction: row;
    justify-content: center;
    background-color: white;
}
body {
    flex: 1;
    display: flex;
    flex-direction: column;

    margin: 0;
    max-width: 80vw;
    min-height: 100vh;

    background-color: lightgrey;
    box-shadow: 0px 0px 20px 0px gray;
}
header {
    flex: 0;
    text-align: center;
}
main {
    flex: 1;

    section {
        margin: 2em 7.5%;
    }
}
footer {
    flex: 0;
    text-align: center;
}
h1, h2, h3, h4, h5, h6{
    font-family: cascadia-code, Arial, Sans-serif;
}
pre, code {
    font-weight: 500;
}