/* readable.css 1.1.0, licensed 0BSD */

/* Font family support */
html,
html[data-font-family="serif"] {
    --font-family: serif;
}
html[data-font-family="sans-serif"] {
    --font-family: sans-serif;
}
html[data-font-family="monospace"] {
    --font-family: monospace;
}

/* Color scheme support */
html,
html[data-theme="light"] {
    --background-color: snow;
    --color: #000;
}
html[data-high-contrast="on"],
html[data-theme="light"][data-high-contrast="on"] {
    --background-color: #fff;
}

html[data-theme="dark"] {
    --background-color: #1f272d;
    --color: #fff;
}
html[data-theme="dark"][data-high-contrast="on"] {
    --background-color: #000;
}

@media (prefers-color-scheme: dark) {
    html {
        --background-color: #222830;
        --color: #fff;
    }
    html[data-high-contrast="on"] {
        --background-color: #000;
    }
}

@media (prefers-contrast: more) {
    :is(html, html[data-theme="light"]):not([data-high-contrast="off"]) {
        --background-color: #fff;
    }

    html[data-theme="dark"]:not([data-high-contrast="off"]) {
        --background-color: #000;
    }
}

/* Generic styles */
:root {
    --column-width: 67ch;
    --form-width: 50ch;
    --line-width: 0.125rem;
    --line-height: 1.5;

    --one-line: calc(var(--line-height) * 1rem);
    --half-line: calc(var(--one-line) * 0.5);

    font-family: var(--font-family);

    background-color: var(--background-color);
    color: var(--color);
}

a {
    color: inherit;
}

a:active {
    color: red;
}

header,
footer,
h1,
h2 {
    text-align: center;
}

footer:not(.exclude) {
    border-top: var(--line-width) solid;
}

summary {
    cursor: pointer;
}

blockquote:not(.exclude) {
    padding-left: var(--one-line);
    border-left: var(--line-width) solid;
}

ul,
ol {
    padding-left: calc(var(--line-height) * 2rem);
}

:is(body, article, main, figure) > :is(img, video):not(.exclude) {
    max-width: 100%;
}

figure:not(.exclude) {
    text-align: center;
}

figure:not(.exclude) > * + figcaption {
    margin-top: 0;
    font-style: italic;
}

article aside:not(.exclude) {
    border: var(--line-width) solid;
    padding: 0 var(--one-line);
    border-radius: var(--half-line);
}

pre {
    max-width: 100%;
    overflow: auto;
}

hr {
    color: inherit;
    border: 0;
    border-top: var(--line-width) solid;
}

/* Vertical Rhythm */
p,
ul,
ol,
figcaption,
nav,
td,
th,
label {
    line-height: var(--line-height);
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
hr,
footer,
header,
nav,
figure,
figcaption,
:is(ul, ol):not(li > *),
:is(body, article, main) > :is(img, video, details):not(.exclude),
table,
article > aside,
article > aside {
    margin: var(--one-line) 0;
}

/* Headings */

header h1 {
    font-weight: normal;
}

h1,
h2 {
    line-height: calc(var(--line-height) * 2rem);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 1.75rem;
}

h3,
h4,
h5,
h6 {
    line-height: var(--one-line);
    padding-top: calc(var(--line-height) * 0.75rem);
    margin-bottom: calc(var(--line-height) * 0.25rem);
}

:is(h3, h4, h5, h6) + * {
    margin-top: 0;
}

/* Navbar */
nav:not(.exclude:not([data-style]), [data-style="none"]) {
    /* This styling only affects the first nav element that is the direct child of the body */
    text-align: center;
    border-width: var(--line-width) 0;
    border-style: solid;
    line-height: var(--line-height);
    display: flex;
    flex-flow: row wrap;
}

nav:not(.exclude:not([data-style]), [data-style="none"]) > * {
    flex-grow: 1;
    margin: calc((var(--line-height) * 0.5rem) - var(--line-width))
        var(--half-line); /* Put half a line's height on both top and bottom, then remove the width of the border */
    text-transform: uppercase;
}

nav[data-style="blockout"],
nav:is([data-style="boxes"], [data-style="roundesque"]) a:is(:hover, :focus) {
    background-color: var(--color);
    color: var(--background-color);
}

nav[data-style="blockout"] a {
    text-decoration: none;
}

nav[data-style="blockout"] a:is(:hover, :focus) {
    background-color: var(--background-color);
    color: var(--color);
}

nav[data-style]:is([data-style="boxes"], [data-style="roundesque"]) {
    border: 0;
}

nav:is([data-style="boxes"], [data-style="roundesque"]) a {
    text-decoration: none;
    border: var(--line-width) solid;
}

nav[data-style="roundesque"] a {
    border-radius: calc(0.25 * var(--one-line));
}

@media (prefers-reduced-motion: no-preference) {
    nav[data-style="classy"] span > a {
        text-decoration: none;
        display: inline-block;
    }

    nav[data-style="classy"] span > a::after {
        content: "";
        width: 0;
        height: var(--line-width);
        display: block;
        background: var(--color);
        transition: 150ms;
    }

    nav[data-style="classy"] span > a:is(:hover, :focus)::after {
        width: 100%;
    }
}

/* Column */
body {
    margin: 0 auto;
    width: min(95%, var(--column-width));
}

/* Justification (default off; use data-justify="on" on <html> to enable) */
/* 67ch (var(--column-width) / 95% (column max-width) === 70.526315789ch */
@media (min-width: 70.5ch) {
    [data-justify="on"] body {
        text-align: justify;
        text-justify: inter-character;
    }
}

/* Tables */
table:not(.exclude) {
    display: block;
    width: 100%;
    overflow: auto;
    border-collapse: collapse;
}

table:not(.exclude) :is(td, th) {
    padding: calc(var(--line-height) * 0.25rem);
    border: var(--line-width) solid;
}

table:not(.exclude) td {
    word-wrap: break-word;
}

/* Forms */
form {
    max-width: var(--form-width);
}

form:not(.exclude)
    :is(
        label:not(input:is([type="checkbox"], [type="radio"]) + label),
        input:not([type="checkbox"], [type="radio"]),
        textarea,
        select
    ) {
    display: block;
    margin: var(--half-line) 0;
}

form:not(.exclude)
    :is(input:not([type="checkbox"], [type="radio"]), textarea, select),
button {
    box-sizing: border-box;
    padding: var(--half-line);
    background: transparent;
    border: var(--line-width) solid;
    color: inherit;
    font: inherit;
    width: 100%;
}

button {
    width: initial;
}

form:not(.exclude)
    label:not(input:is([type="checkbox"], [type="radio"]) + label) {
    font-weight: bold;
}