:root {
    --font-size: 1.25rem;
    --line-height: 1.54;
    --font-family: "Atkinson Hyperlegible Next", sans-serif;
    --font-family-mono: ui-monospace, monospace;

    --spacing: 1.54rem;
    --spacing-half: calc(var(--spacing) / 2);
    --spacing-double: calc(var(--spacing) * 2);

    --container-max-width: 50rem;
    --container-padding: 1rem;

    --radius: 0;

    --color-bg:          #ffffff;
    --color-bg-dim:      #f8f8f8;
    --color-bg-alt:      #f0f0f0;
    --color-fg:          #000000;
    --color-fg-dim:      #595959;
    --color-link:        #0031a9;
    --color-link-visited:#005e8b;
    --color-link-hover:  #354fcf;
    --color-accent:      #0031a9;
    --color-red:         #a60000;
    --color-green:       #006800;
    --color-yellow:      #6f5500;
    --color-blue:        #0031a9;
    --color-magenta:     #8f0075;
    --color-cyan:        #005e8b;
    --color-warm:        #5d3026;
    --color-cold:        #093060;
    --color-mild:        #184034;
    --color-calm:        #61284f;
    --color-border:      color-mix(in srgb, var(--color-fg) 15%, transparent);

    @media (max-width: 684px) {
        --font-size: 0.95rem;
        --container-padding: 1rem;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg:          #000000;
        --color-bg-dim:      #110b11;
        --color-bg-alt:      #1e1e1e;
        --color-fg:          #ffffff;
        --color-fg-dim:      #989898;
        --color-link:        #2fafff;
        --color-link-visited:#00d3d0;
        --color-link-hover:  #79a8ff;
        --color-accent:      #2fafff;
        --color-red:         #ff5f59;
        --color-green:       #44bc44;
        --color-yellow:      #d0bc00;
        --color-blue:        #2fafff;
        --color-magenta:     #f78fe7;
        --color-cyan:        #00d3d0;
        --color-warm:        #f8dec0;
        --color-cold:        #c6eaff;
        --color-mild:        #bfebe0;
        --color-calm:        #fbd6f4;
    }
}

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

html {
    accent-color: var(--color-accent);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;

    @media (prefers-reduced-motion: no-preference) {
        scroll-behavior: smooth;
    }
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size);
    line-height: var(--line-height);
    background: var(--color-bg);
    color: var(--color-fg);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--container-padding);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin: var(--spacing) 0 var(--spacing-half);
    padding: 0;
    font-weight: 700;
}

h1 { font-size: calc(var(--font-size) * 2.074); }
h2 { font-size: calc(var(--font-size) * 1.728); color: var(--color-warm); }
h3 { font-size: calc(var(--font-size) * 1.44);  color: var(--color-cold); }
h4 { font-size: calc(var(--font-size) * 1.2);   color: var(--color-mild); }
h5 { font-size: calc(var(--font-size) * 1.1);   color: var(--color-calm); }
h6 { font-size: var(--font-size);               color: var(--color-fg-dim); }

p, ul, ol, figure, pre, table, blockquote, dl, details {
    margin: 0 0 var(--spacing);
    text-align: justify;
    text-justify: inter-character;
}

b, strong { font-weight: 700; }
i, em { font-style: italic; }
small { font-size: 0.79rem; }
time { font-variant: tabular-nums; }

hgroup {
    margin-bottom: var(--spacing);
}

hgroup > *:last-child:not(h1):not(h2):not(h3):not(h4):not(h5):not(h6) {
    color: var(--color-fg-dim);
}

hgroup > h1, hgroup > h2, hgroup > h3 {
    margin-bottom: 0;
}

section:not(:last-child) {
    padding-bottom: var(--spacing);
    border-bottom: 1px solid var(--color-border);
}

section:last-child {
    padding-bottom: var(--spacing);
}

strong a,
strong a:visited, 
strong a:hover, 
strong a:active{
    color: inherit;
    text-decoration: none;
}

a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    outline: none;
}

a:visited {
    color: var(--color-link-visited);
}

a:hover, a:focus {
    color: var(--color-link-hover);
}

a:focus-visible {
    outline: 1px solid var(--color-accent);
    outline-offset: 2px;
}

ul, ol {
    padding-left: 2em;
}

ul ul, ul ol, ol ul, ol ol {
    margin-bottom: 0;
}

li + li {
    margin-top: 0.35em;
}

nav li + li {
    margin-top: 0;
}

li::marker {
    color: var(--color-accent);
}

dt {
    font-weight: 700;
    margin-top: var(--spacing-half);
}

dd {
    margin-left: 2em;
    margin-bottom: var(--spacing-half);
}

hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing) 0;
}

blockquote {
    position: relative;
    padding: var(--spacing-half) var(--spacing);
    border-left: 3px solid var(--color-accent);
    color: var(--color-mild);
    font-style: italic;
}

blockquote > *:first-child { margin-top: 0; }
blockquote > *:last-child  { margin-bottom: 0; }

blockquote b, blockquote strong { font-weight: 700; font-style: normal; }
blockquote em, blockquote i { font-weight: 700; }

code, kbd, samp {
    font-family: var(--font-family-mono);
    font-size: 0.889em;
}

:not(pre) > code {
    color: var(--color-magenta);
    background: color-mix(in srgb, var(--color-fg) 5%, transparent);
    border: 1px solid var(--color-border);
    padding: 0.1em 0.35em;
    border-radius: 2px;
}

pre {
    background: var(--color-bg-dim);
    color: var(--color-fg);
    padding: 1rem;
    overflow-x: auto;
    font-size: calc(var(--font-size) * 0.889);
    border-top: 3px solid var(--color-bg-alt);
    border-bottom: 3px solid var(--color-bg-alt);
    white-space: pre;
    word-break: normal;
    tab-size: 4;
}

pre code {
    background: none;
    color: inherit;
    border: none;
    padding: 0;
    font-size: inherit;
}

kbd {
    background: color-mix(in srgb, var(--color-fg) 5%, transparent);
    border: 1px solid var(--color-border);
    border-bottom-width: 3px;
    padding: 0.1em 0.4em;
    border-radius: 3px;
}

table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.889em;
}

thead {
    background-color: var(--color-bg-dim);
}

th {
    border: 2px solid var(--color-bg-alt);
    padding: 0.5rem;
    text-align: start;
    font-weight: 700;
}

tbody {
    border: 2px solid var(--color-bg-alt);
}

td {
    border: 1px solid var(--color-bg-alt);
    padding: 0.5rem;
}

tr:nth-child(even) {
    background-color: var(--color-bg-dim);
}

tr:hover {
    background-color: var(--color-bg-alt);
}

img, video {
    display: block;
    max-width: 100%;
    height: auto;
}

figure {
    padding: 0;
}

figure > img, figure > video {
    margin: 0 auto;
}

figcaption {
    font-size: 0.889em;
    color: var(--color-fg-dim);
    text-align: center;
    margin-top: 0.5em;
}

button, input[type="submit"], input[type="button"] {
    font: inherit;
    font-weight: 700;
    background: transparent;
    color: var(--color-accent);
    padding: 0.4em 1.2em;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s linear;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
    background: color-mix(in srgb, var(--color-accent) 15%, transparent);
}

input, textarea, select {
    font: inherit;
    background: transparent;
    color: var(--color-fg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5em 0.75em;
}

input:focus, textarea:focus, select:focus,
button:focus-visible, input[type="submit"]:focus-visible {
    outline: 1px solid var(--color-accent);
    outline-offset: 2px;
}

details {
    border: 1px solid var(--color-accent);
    padding: 0;
}

summary {
    padding: 0.5em 1em;
    color: var(--color-accent);
    cursor: pointer;
    font-weight: 700;
    transition: background 0.15s linear;
}

summary:hover {
    background: color-mix(in srgb, var(--color-accent) 10%, transparent);
}

details[open] > *:not(summary) {
    padding-left: 1em;
    padding-right: 1em;
}

details[open] > *:last-child {
    margin-bottom: 1em;
}

abbr[title] {
    text-decoration-style: wavy;
    text-decoration-color: var(--color-accent);
    cursor: help;
}

mark {
    background: color-mix(in srgb, var(--color-accent) 40%, transparent);
    color: var(--color-fg);
    padding: 0.05em 0.2em;
}

sub, sup {
    font-size: 85%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}
sub { bottom: -0.25em; }
sup { top: -0.5em; }

header {
    padding-bottom: var(--spacing-half);
    border-bottom: 1px solid var(--color-border);
}

header > nav, footer > nav, nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em 1em;
    list-style: none;
    margin: 0;
    padding: 0;
}

main {
    flex: 1 0 auto;
}

footer {
    padding-top: var(--spacing);
    margin-top: var(--spacing-double);
    font-size: 0.9rem;
    color: var(--color-fg-dim);
    border-top: 1px solid var(--color-border);
}

article {
    margin-bottom: var(--spacing);
}

.footnotes, section[role="doc-endnotes"] {
    font-size: 0.889em;
    margin-top: var(--spacing-double);
    padding-top: var(--spacing);
    border-top: 1px dotted var(--color-fg-dim);
    color: var(--color-fg-dim);
}

@media print {
    :root {
        --color-bg: #fff;
        --color-fg: #000;
        --color-fg-dim: #333;
        --color-link: #000;
        --color-link-visited: #000;
        --color-accent: #000;
    }

    header > nav, footer {
        display: none;
    }

    body {
        font-size: 12pt;
    }

    pre {
        white-space: pre-wrap;
        border: 1px solid #ccc;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.85em;
    }
}