:root {
    --color-bg: hsl(5, 5%, 95%);
    --color-text: hsl(5, 5%, 5%);
    --color-hover: hsl(5, 5%, 90%);
    --color-border: hsl(5, 5%, 85%);
    --border: 0.1rem solid var(--color-border);
}

* {
    margin: 0;
    padding: 0;
}

body {
    display: grid;
    grid-template-columns: 1fr minmax(min-content, 40rem) 1fr;
    gap: 0 min(10rem, 10vw);
    background-image: url(images/grain.png);
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: STIX Two Text Regular;
    overflow-y: scroll;
}

nav {
    position: sticky;
    display: flex;
    flex-direction: column;
    top: 0;
    height: 100vh;
}

nav.ot {
    grid-column: 1;
    justify-self: end;
    border-right: var(--border);
}

nav.nt {
    grid-column: 3;
    justify-self: start;
    border-left: var(--border);
}

nav ol {
    padding: 1rem 0;
    border-top: var(--border);
    overflow-y: auto;
    scrollbar-width: thin;
}

nav li {
    white-space: nowrap;
}

nav a {
    padding: 0 1rem;
    display: block;
    color: var(--color-text);
    text-decoration: none;
}

nav a:hover {
    background: var(--color-hover);
}

main {
    grid-column: 2;
    width: 100%;
    justify-self: center;
}

main section {
    padding-bottom: 1rem;
    border-bottom: var(--border);
}

main section:last-child {
    padding-bottom: 2rem;
    border-bottom: none;
}

main p {
    position: relative;
    padding: 0 2rem;
    text-align: justify;
    hyphens: auto;
}

main i {
    font-family: STIX Two Text Italic;
    font-style: normal;
}

main sup {
    position: absolute;
    padding-right: 0.5rem;
    box-sizing: border-box;
    left: 0;
    width: 2rem;
    text-align: right;
}

main img {
    margin: 0 auto;
    display: block;
    width: 4rem;
}

h1, h2, h3 {
    padding: 0.5rem 0;
    text-align: center;
    font-weight: normal;
    font-size: 1rem;
}

h2 {
    position: sticky;
    top: 0;
    z-index: 1;
    background-image: url(images/grain.png);
    background-color: var(--color-bg);
    border-bottom: var(--border);
}

h3 {
    padding: 1rem;
}

@font-face {
    font-family: STIX Two Text Regular;
    src: url(fonts/STIXTwoText-Regular.woff2) format(woff2);
}

@font-face {
    font-family: STIX Two Text Italic;
    src: url(fonts/STIXTwoText-Italic.woff2) format(woff2);
}

@media only screen and (max-width: 800px) {
    html {
        scrollbar-width: thin;
    }

    body {
        grid-template-columns: auto;
        gap: 0;
    }

    nav {
        display: none;
    }

    body.index {
        overflow-y: auto;
    }

    body.index nav {
        display: flex;
        width: 100%;
    }

    body.index nav.nt {
        grid-column: 2;
        border-left: none;
    }

    body.index main {
        display: none;
    }
}