:root {
  --black: #0f0f0f;
  --white: WhiteSmoke;
  --ac: MediumPurple;

  --fg: var(--black);
  --bg: var(--white);

  --body-spacing: 45px;
  --body-line-height: 1.3;
  --body-inline-padding: 15px;

  color-scheme: light dark;
}

::selection {
  background: var(--ac);
  opacity: 1.0;
  color: var(--black);
  padding: 10px;
}

a {
  color: var(--fg);

}

a:hover {
  background: color-mix(in srgb, var(--ac) 40%, transparent);
}

body {
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
  font-family: var(--ff, sans-serif);
  padding: var(--body-spacing);
  margin: 0;
}

body>*+* {
  margin-top: var(--body-spacing);
}

header {
  float: left;
  margin: 0 var(--body-spacing) 0 0;
}

header a {
  text-decoration: none;
}

header a img {
  max-height: 55px;
  vertical-align: bottom;
}

header+nav {
  margin-top: 0;
}

nav section {
  display: inline-block;
  line-height: var(--body-line-height);
  vertical-align: top;
}

nav section+* {
  margin-left: 1rem;
}

nav ul {
  margin: 0px;
  padding: 0px;
}

main {
  clear: both;
  max-width: 700px;
}

main>* {
  margin-bottom: 30px
}

main blockquote {
  margin-left: 0;
  border-left: 1px dashed var(--fg);
  padding-left: 1rem;
}

main>h1 {
  font-size: 1.5rem;
  text-transform: capitalize;
}

main>h2 {
  font-size: 1.3rem;
  text-transform: capitalize
}

main>h3 {
  font-size: 1.2rem;
  text-transform: capitalize
}

main>h4 {
  font-size: 1.1rem;
  text-transform: capitalize
}

main p {
  line-height: var(--body-line-height);
  margin-top: 0px;
}

figure {
  margin: 0;
  padding-bottom: var(--body-inline-padding);
}

figcaption {
  text-align: end;
  font-size: smaller;
  padding: 2px
}

main hr {
  border-color: color-mix(in srgb, var(--fg) 20%, var(--bg));
  clear: both;
}

main img {
  max-width: 100%;
  object-fit: contain;
}

main>q {
  max-width: 500px;
  display: block;
  margin-left: 30px;
}

main>pre {
  background: color-mix(in srgb, var(--bg) 95%, var(--fg));
  border: 1px dashed color-mix(in srgb, var(--bg) 80%, var(--fg));
  font-family: monospace;
  padding: var(--body-inline-padding);
}

main>code {
  font-family: monospace;
  margin-bottom: 30px;
  display: block;
  background: var(--fg);
  color: var(--bg);
  padding: var(--body-inline-padding);
  white-space: pre
}

main>code comment {
  color: #777
}

main ol,
main ul {
  margin-top: 0;
  margin-bottom: 30px;
  line-height: var(--body-line-height);
}

/*main ol li+*,*/
/*main ul li+* {*/
/*  margin-top: 1ex;*/
/*}*/

main ol li>p,
main ul li>p {
  margin: 0;
}

main ol {
  list-style-type: decimal-leading-zero;
}

main ul {
  list-style-type: square;
}

/* task list */

main ul.task-list li {
  list-style-type: none;
  padding: 5px;
}

main ul.task-list li+* {
  margin-top: 1ex;
}

main ul.task-list li:has(label:hover) {
  padding: 4px;
  background: color-mix(in srgb, var(--fg) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--fg) 10%, transparent);
}

main ul.task-list li:has(input:checked) {
  padding: 4px;
  background: color-mix(in srgb, var(--ac) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--ac) 20%, transparent);
}

main ul.task-list input {
  margin: 0 1em 0 -2em;
}

/* table */

main table img {
  max-width: 100%;
  display: block;
  margin: 20px 0;
}

main table tr th {
  text-align: start;
  font-weight: bold
}

main table tr>* {
  padding: 5px 15px;
  vertical-align: top;
}

/* date */

main span.date {
  font-family: monospace;
  display: inline-block;
  width: 100%;
  text-align: end;
}

/* toc */

main nav.table-of-contents {
  /*max-width: 30ch;*/

  position: sticky;
  top: 1rem;

  float: right;
  margin-right: -22ch;
}

main nav.table-of-contents>ol {
  list-style: inside disclosure-closed;
}

main nav.table-of-contents>ol>:first-child {
  text-transform: none;
  line-height: 2.0;
}

/* footnotes */

main section#footnotes {
  margin-bottom: 0;
  font-size: smaller;
}

main section#footnotes hr {
  display: none;
}

main .footnote-back {
  margin-left: 1ch;
}

/* footer */

footer {
  font-size: 0.9rem;
  border-top: 1px solid color-mix(in srgb, var(--fg) 20%, var(--bg));
  padding-top: var(--body-spacing);
  line-height: var(--body-line-height);
  clear: both;
}

body>a[href="#top"]:last-child {
  float: right;
  margin-top: -2rem;
}

details[open]>*:not(summary) {
  margin: 1ex 0 0 0;
}

/* modular */

.col2 {
  columns: 2
}

.capital {
  text-transform: capitalize
}

.nocapital {
  text-transform: unset !important;
}

.notice {
  padding: var(--body-inline-padding);
  border: 1px solid var(--ac);
  background-color: color-mix(in srgb, var(--ac) 10%, var(--bg));
  color: color-mix(in srgb, var(--fg) 90%, var(--bg));
}

.notice,
.notice>* {
  font-size: 0.8rem;
}

.notice h1 {
  text-align: end;
  font-size: 0.9rem;
  text-transform: capitalize;
}

ul.nobull li {
  list-style-type: none
}

.hidden {
  display: none
}

.fullpage {
  /*
   * NOTE: 7rem = the height of header + footer, then the spacing between
   *       header and content and footer and line and content
   */
  --header-and-footer-max-height: calc(7rem + (var(--body-spacing) * 3));

  width: calc(100vw - (var(--body-spacing) * 2));
  height: calc(100vh - (var(--body-spacing) * 2) - var(--header-and-footer-max-height));
}

.center {
  display: grid;
  place-items: center;
}

.size-s {
  max-height: 150px;
}

.size-m {
  max-height: 220px;
}

.size-l {
  max-height: 400px;
}

.float-l {
  float: left;
  padding-right: var(--body-inline-padding);
}

.float-r {
  float: right;
  padding-left: var(--body-inline-padding);
}

:is(div, p):has(>.i) {
  display: flex;
  flex-flow: row wrap;
  grid-gap: var(--body-inline-padding);
}

:is(div, p)>.i {
  max-width: 100%;
}

/* theme */

@media (prefers-color-scheme: dark) {
  :root {
    --fg: var(--white);
    --bg: var(--black);
  }

  .mono {
    filter: invert(1)
  }
}

/* mobile */

@media (max-width: 768px) {
  :root {
    --body-spacing: 25px;
  }

  main ul,
  main ol {
    padding-left: 1rem;
  }

  main ul a,
  main ol a {
    line-height: 1.8;
  }

  main img {
    max-width: 100%;
  }

  main nav.table-of-contents {
    float: unset;
    margin-right: unset;
    position: unset;
  }

  main nav.table-of-contents>ol {
    columns: 2;
    list-style: outside disclosure-closed;
  }

  main nav.table-of-contents>ol>:first-child {
    display: none;
  }
}

@media (max-width: 320px) {}

/* typography */

:root {
  --vf-grad: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --vf-grad: -50;
  }
}

html {
  font-synthesis: none;
  font-variation-settings: "GRAD" var(--vf-grad, 0);

  text-size-adjust: none;
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;

  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;

  text-align: justify;
  text-justify: inter-word;
  text-decoration-skip-ink: auto;
}

main {
  margin-block-start: var(--body-spacing);
}

main pre,
main code,
main var,
main samp,
main kbd,
main h1,
main h2,
main h3,
main h4,
main h5,
main h6 {
  -webkit-hyphens: manual;
  hyphens: manual;
}

h1 {
  font-variant-numeric: lining-nums;
  font-variant-ligatures: discretionary-ligatures;
}

td,
math,
time[datetime*=":"] {
  font-variant-numeric: tabular-nums lining-nums slashed-zero;
}