/* Light theme. */
:root {
    --bg: #dbc9ba;
    --fg: #111111;
    --accent: #af3b2c;
    --on-accent: var(--fg);
    --gray: darkgray;
}
* {
    font-palette: ligth;
}
/* Dark theme. */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111111;
        --fg: #dbc9ba;
        --accent: #d05443;
        --on-accent: var(--fg);
        --gray: lightgray;
    }
    * {
        font-palette: dark;
    }
}

/* Increased accessibility mode. */
@media (forced-colors: active) {
    --bg: Canvas;
    --fg: CanvasText;
    --accent: AccentColor;
    --on-accent: AccentColorText;
}

:root {
    box-sizing: border-box;
    /* https://kilianvalkhof.com/2022/css-html/your-css-reset-needs-text-size-adjust-probably/ */
    -moz-text-size-adjust: none;
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
}
/* Special pseudo-elements. */
::selection, mark, ::target-text {
    background-color: var(--accent);
    color: var(--on-accent);
    border-radius: 0.2em;
    padding: 0 0.1em;
}
::backdrop {
    opacity: 0.7;
    background-color: var(--fg);
}
::marker {
    color: var(--accent);
}

* {
    box-sizing: border-box;
    border-spacing: 0;
    font-family: sans-serif;
    scrollbar-color: var(--accent) rgba(0, 0, 0, 0);
    caret-color: var(--accent);
    accent-color: var(--accent);
}

*, *::before, *::after {
    box-sizing: inherit;
}

html {
    font-size: large;
    min-height: 100%;
    padding: 0;
    margin: 0;
}

body {
    margin: 0;
    padding: 1em;
    background: var(--bg);
    color: var(--fg);
    min-height: 100%;
    font-size: max(1em, 16px, 1rem);
}

@media (min-device-width: 500px) {
    main {
        margin: 0 auto;
        max-width: 70em;
    }
}

section {
    padding: 0 0.3em;
}

form {
    padding: 1em 0;
}

p {
    line-height: 1.5;
}

q {
    padding: 0.2em;
    display: inline-block;
}

a {
    color: inherit;
    font-family: inherit;
    font-style: italic;
    padding: 0.1em;
    border-radius: 0.2em;
}
a:hover {
    background-color: var(--accent);
    color: var(--on-accent);
}
a:active {
    background-color: var(--fg);
    color: var(--bg);
}

img {
    display: block;
    max-width: 100%;
    min-width: 20%;
    height: auto;
    max-height: 90vh;
    margin: 0 auto;
}
img:not(figure img):not(a img) {
    margin: 1em auto;
}
a:has(img) {
    display: block;
    margin: 0;
    padding: 0;
}
a img {
    border: 0.1em solid var(--bg);
    border-radius: 0.2em;
    margin: 0 auto;
}
a img:hover {
    border-color: var(--accent);
}

hr {
    border: 0.1em solid var(--accent);
}

h1 {
    font-size: 2em;
    word-break: break-word;
    overflow-wrap: anywhere;
}
h2 {
    font-size: 1.5em;
    word-break: break-word;
    overflow-wrap: anywhere;
}
h3 {
    font-size: 1.3em;
}
h4 {
    font-size: 1.2em;
}
h5 {
    font-size: 1.1em;
}
h6 {
    font-size: 1em;
}
h2 a[href^="#"],
h3 a[href^="#"],
h4 a[href^="#"],
h5 a[href^="#"],
h6 a[href^="#"] {
    display: none;
}
h2:hover a[href^="#"],
h3:hover a[href^="#"],
h4:hover a[href^="#"],
h5:hover a[href^="#"],
h6:hover a[href^="#"] {
    display: inline;
}
/* non-clashing headings */
h1+h2, h2+h3, h3+h4, h4+h5, h5+h6 {
    margin-top: .5em;
    padding-top: 0;
}

li {
    padding: 0.3em;
}

dt, dd {
    padding: 0.2em;
}
dt {
    color: var(--accent);
    font-weight: bold;
}

ul, ol {
    padding-left: 1em;
}

pre, blockquote {
    margin: 0px;
    padding: 0.7em;
    overflow-x: auto;
}
pre {
    font-family: monospace;
}

table {
    margin: 1em auto;
    border-collapse: collapse;
    border: 0.1em solid var(--fg);
    font-size: 1em;
}
.scrollable table {
    margin: 0 auto;
}
.scrollable {
    margin: 1em auto;
}
td, th {
    border: 1px solid var(--fg);
    background-color: var(--bg);
    text-align: left;
    font-family: monospace;
    padding: 0.2em;
}
th {
    font-weight: bold;
}
thead, tfoot {
    font-weight: bold;
}

figure {
    margin: 1em 0;
    border-left: 0.2em solid var(--fg);
    border-top-left-radius: 0.2em;
    border-bottom-left-radius: 0.2em;
}
caption, figcaption {
    background-color: var(--fg);
    color: var(--bg);
    text-align: left;
    padding: 0.5em;
}
figcaption {
    border-bottom-right-radius: 0.2em;
    border-bottom: 0.1em solid var(--fg);
}

code, kbd, samp, output {
    border-radius: 0.3em;
    border: 1px solid var(--accent);
    padding: 0.05em;
    font-family: monospace;
}
kbd {
    background-color: var(--gray);
    border: 1px solid var(--fg);
}
output {
        border: 1px solid var(--gray);
}

details {
    margin-top: 1em;
    border-radius: 0.2em;
    border-color: var(--fg);
    border-style: solid;
    border-width: 0 0 3px 3px;
}
details summary::marker {
    color: var(--bg);
}
details > :not(summary) {
    margin-left: 1em;
}
summary {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

/* Notes tangentially related to the content,
 * but slightly interrupting the narrative.
 * I might at some point split these into Example and other categories.
 * But there was no need for that yet. */
.note {
    border-width: 0.1em 0 0.1em 0.1em;
    border-top-left-radius: 0.2em;
    border-bottom-left-radius: 0.2em;
    border-color: var(--accent);
    border-style: solid;
    padding: 0 1em;
    margin: 1em 0;
}

/* Scrollable containers, as in table-wrapping boxes.
 * Tables are not scrollable nor overflowable,
 * thus the <div class=scrollable> hack. */
.scrollable {
    overflow-x: auto;
    overscroll-behavior: contain;
}

/* https://www.a11yproject.com/posts/how-to-hide-content/ */
.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

@view-transition {
    navigation: auto;
}