/* Derives from Simple.css at https://raw.githubusercontent.com/kevquirk/simple.css */

@font-face {
  font-family: plex;
  src: url(font/plex.woff2);
}

/* Global variables. */
:root {
  /* Set sans-serif & mono fonts */
  --sans-font: plex, -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir,
    "Nimbus Sans L", Roboto, "Noto Sans", "Segoe UI", Arial, Helvetica,
    "Helvetica Neue", sans-serif;
  --mono-font: Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
  --standard-border-radius: 5px;
  --border-width: 1px;
}

/* Dark theme */
:root,
body > header,
body > footer {
  color-scheme: dark;
  --bg: #212121;
  --accent-bg: #2b2b2b;
  --text: white;
  --text-light: #ababab;
  --accent: #ffb300;
  --accent-hover: #ffe099;
  --accent-text: var(--bg);
  --border: hsl(0, 0%, 30%);
  --preformatted: #ccc;
  --disabled: #111;
}

/* Light theme */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #fff;
    --accent-bg: #f5f7ff;
    --text: black;
    --text-light: hsl(0, 0%, 50%);
    --accent: #c48900;
    --accent-hover: #feb200;
    --accent-text: var(--bg);
    --border: hsl(0, 0%, 80%);
    --preformatted: #444;
    --marked: #ffdd33;
    --disabled: #efefef;
  }
}

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

/* Reset default appearance */
textarea,
select,
input,
progress {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

html {
  /* Set the font globally */
  font-family: var(--sans-font);
  scroll-behavior: smooth;
}

/* Make the body a nice central block */
body {
  color: var(--text);
  background-color: var(--bg);
  font-size: 1.15rem;
  line-height: 1.5;
  display: grid;
  grid-template-columns: 1fr min(70ch, 90%) 1fr;
  margin: 0;
}
body > * {
  grid-column: 2;
}

main {
  padding: 4rem 0;

  > article:first-of-type > h3 {
    font-weight: 300;
  }
}

body > footer {
  padding: 1rem;
  grid-column: 1 / span 3;
  display: grid;
  grid-template-columns: subgrid;

  background-color: black;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.2rem;

  nav {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
  }
}

/* Format headers */
h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2.6rem;
  margin-top: 3rem;
}

h3 {
  font-size: 1.8rem;
  margin-top: 3rem;
}

h4 {
  font-size: 1.44rem;
}

h5 {
  font-size: 1.15rem;
}

h6 {
  font-size: 0.96rem;
}

p {
  margin: 0 0 1.5rem 0;
}

b {
  font-weight: 600;
}

/* Prevent long strings from overflowing container */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* Fix line height when title wraps */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: 1.5rem;
  line-height: 1.3;
  font-weight: 500;
}

/* Reduce header size on mobile */
@media only screen and (max-width: 720px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2.1rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  h4 {
    font-size: 1.25rem;
  }
}

/* Format links & buttons */
a,
a:visited {
  color: var(--accent);
  text-decoration: none;
}

button,
.button,
a.button, /* extra specificity to override a */
input[type="submit"],
input[type="reset"],
input[type="button"] {
  border: var(--border-width) solid var(--accent);
  background-color: var(--accent);
  color: var(--accent-text);
  padding: 0.5em;
  text-decoration: none;
  line-height: normal;
}

.button[aria-disabled="true"],
input:disabled,
textarea:disabled,
select:disabled,
button[disabled] {
  cursor: not-allowed;
  background-color: var(--disabled);
  border-color: var(--disabled);
  color: var(--text-light);
}

input[type="range"] {
  padding: 0;
}

/* Set the cursor to '?' on an abbreviation and style the abbreviation to show that there is more information underneath */
abbr[title] {
  cursor: help;
  text-decoration-line: underline;
  text-decoration-style: dotted;
}

button:enabled:hover,
.button:not([aria-disabled="true"]):hover,
input[type="submit"]:enabled:hover,
input[type="reset"]:enabled:hover,
input[type="button"]:enabled:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  cursor: pointer;
}

.button:focus-visible,
button:focus-visible:where(:enabled),
input:enabled:focus-visible:where(
    [type="submit"],
    [type="reset"],
    [type="button"]
  ) {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Format navigation */
body > header {
  position: sticky;
  top: 0;
  padding: 0.5rem 0;

  grid-column: 1 / span 3;
  display: grid;
  grid-template-columns: subgrid;

  color: var(--text);
  background-color: black;
  box-shadow: 0 0 0.2rem #0000001a, 0 0.2rem 0.4rem #0003;

  > * {
    grid-column: 2;
    grid-row: 1;
  }

  nav {
    font-size: 1rem;
    line-height: 2;
    display: flex;
    gap: 1rem;
    align-items: center;

    img {
      width: 2rem;
      height: 2rem;
      margin: auto 2px;
    }

    div {
      display: flex;
      flex-direction: row;
    }

    h2 {
      margin: 0;
      font-weight: 300;
    }

    ul {
      margin: 0 auto;
      align-content: space-around;
      align-items: center;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      list-style-type: none;
      gap: 1rem;
      padding: 0;
    }
  }
}

/* List items are inline elements, make them behave more like blocks */
header nav ul li {
  display: inline-block;
}

header nav a,
header nav a:visited {
  margin: 0;
  border: var(--border-width) solid var(--border);
  border-radius: var(--standard-border-radius);
  color: var(--text);
  display: inline-block;
  padding: 0 1rem;
  text-decoration: none;
}

header nav a:hover,
header nav a.primary,
header nav a[aria-current="page"],
header nav a[aria-current="true"] {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
  cursor: pointer;
}

/* Reduce nav side on mobile */
@media only screen and (max-width: 850px) {
  body > header nav {
    gap: 0.25rem;

    ul {
      gap: 0.25rem;
    }

    a {
      padding: 0 0.5rem;
    }

    h2,
    #stars {
      display: none;
    }
  }
}

header nav a.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: black;
}

header nav a.chat {
  margin-left: calc(-1 * var(--standard-border-radius));
  background: var(--bg);
  border-radius: 0 var(--standard-border-radius) var(--standard-border-radius) 0;
  border-color: var(--accent);
  color: var(--accent);
}

header nav #stars {
  margin-left: 0.5rem;
  color: white;
}

header nav a:has(img) {
  padding: 0;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Consolidate box styling */
details,
pre,
progress {
  margin-bottom: 1rem;
}

fieldset,
dialog {
  border: var(--border-width) solid var(--border);
  padding: 1rem;
  border-radius: var(--standard-border-radius);
  margin-bottom: 1rem;
}

section {
  margin: 0 0 4rem 0;
}

/* Don't double separators when chaining sections */
section + section,
section:first-child {
  border-top: 0;
  padding-top: 0;
}

section + section {
  margin-top: 0;
}

section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

article {
  margin-bottom: 3rem;
}

/* Aside in article */
@media only screen and (min-width: 850px) {
  article:has(aside) {
    display: grid;
    grid-template-columns: 1fr 40%;
    column-gap: 1rem;

    > * {
      grid-column: 1;
    }

    > aside {
      grid-column: 2;
    }
  }
}

details {
  padding: 0.7rem 1rem;
}

summary {
  cursor: pointer;
  font-weight: bold;
  padding: 0.7rem 1rem;
  margin: -0.7rem -1rem;
  word-break: break-word;
}

details[open] > summary + * {
  margin-top: 0;
}

details[open] > summary {
  margin-bottom: 0.5rem;
}

details[open] > :last-child {
  margin-bottom: 0;
}

/* Format tables */
table {
  border-collapse: collapse;
  margin: 1.5rem 0;
}

figure > table {
  width: max-content;
  margin: 0;
}

td,
th {
  border: var(--border-width) solid var(--border);
  text-align: start;
  padding: 0.5rem;
}

th {
  background-color: var(--accent-bg);
  font-weight: bold;
}

tr:nth-child(even) {
  /* Set every other cell slightly darker. Improves readability. */
  background-color: var(--accent-bg);
}

table caption {
  font-weight: bold;
  margin-bottom: 0.5rem;
}

/* Format forms */
textarea,
select,
input,
button,
.button {
  font-size: inherit;
  font-family: inherit;
  padding: 0.5em;
  margin-bottom: 0.5rem;
  border-radius: var(--standard-border-radius);
  box-shadow: none;
  max-width: 100%;
  display: inline-block;
}
textarea,
select,
input {
  color: var(--text);
  background-color: var(--bg);
  border: var(--border-width) solid var(--border);
}
label {
  display: block;
}
textarea:not([cols]) {
  width: 100%;
}

/* Add arrow to drop-down */
select:not([multiple]) {
  background-image: linear-gradient(45deg, transparent 49%, var(--text) 51%),
    linear-gradient(135deg, var(--text) 51%, transparent 49%);
  background-position: calc(100% - 15px), calc(100% - 10px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-inline-end: 25px;
}
*[dir="rtl"] select:not([multiple]) {
  background-position: 10px, 15px;
}

/* checkbox and radio button style */
input[type="checkbox"],
input[type="radio"] {
  vertical-align: middle;
  position: relative;
  width: min-content;
}

input[type="checkbox"] + label,
input[type="radio"] + label {
  display: inline-block;
}

input[type="radio"] {
  border-radius: 100%;
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
  background-color: var(--accent);
}

input[type="checkbox"]:checked::after {
  /* Creates a rectangle with colored right and bottom borders which is rotated to look like a check mark */
  content: " ";
  width: 0.2em;
  height: 0.4em;
  border-radius: 0;
  position: absolute;
  top: 0.04em;
  left: 0.18em;
  background-color: transparent;
  border-right: solid var(--bg) 0.08em;
  border-bottom: solid var(--bg) 0.08em;
  font-size: 1.8em;
  transform: rotate(45deg);
}
input[type="radio"]:checked::after {
  /* creates a colored circle for the checked radio button  */
  content: " ";
  width: 0.3em;
  height: 0.3em;
  border-radius: 100%;
  position: absolute;
  top: 0.125em;
  background-color: var(--bg);
  left: 0.125em;
  font-size: 1.8em;
}

/* Makes input fields wider on smaller screens */
@media only screen and (max-width: 720px) {
  textarea,
  select,
  input {
    width: 100%;
  }
}

/* Set a height for color input */
input[type="color"] {
  height: 2.5rem;
  padding: 0.2rem;
}

/* do not show border around file selector button */
input[type="file"] {
  border: 0;
}

/* Misc body elements */
hr {
  border: none;
  height: var(--border-width);
  background: var(--border);
  margin: 1rem auto;
}

mark {
  padding: 2px 5px;
  border-radius: var(--standard-border-radius);
  background-color: var(--marked);
  color: black;
}

mark a {
  color: var(--accent);
}

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

figure {
  margin: 0;
  display: block;
  overflow-x: auto;
}

figure > img,
figure > picture > img {
  display: block;
  margin-inline: auto;
}

figcaption {
  position: sticky;
  left: 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-block: 1rem;
}

blockquote {
  margin-inline-start: 2rem;
  margin-inline-end: 0;
  margin-block: 2rem;
  padding: 0.4rem 0.8rem;
  border-inline-start: 0.35rem solid var(--accent);
  color: var(--text-light);
  font-style: italic;
}

cite {
  font-size: 0.9rem;
  color: var(--text-light);
  font-style: normal;
}

dt {
  color: var(--text-light);
}

/* Use mono font for code elements */
pre,
pre span,
kbd,
samp {
  font-family: var(--mono-font);
}

code.hljs {
  max-width: 70ch;
  background-color: black;
  border-radius: var(--standard-border-radius);
  font-family: var(--mono-font);
  font-size: 0.9rem;
}

kbd {
  color: var(--preformatted);
  border: var(--border-width) solid var(--preformatted);
  border-bottom: 3px solid var(--preformatted);
  border-radius: var(--standard-border-radius);
  padding: 0.1rem 0.4rem;
}

/* Progress bars */
/* Declarations are repeated because you */
/* cannot combine vendor-specific selectors */
progress {
  width: 100%;
}

progress:indeterminate {
  background-color: var(--accent-bg);
}

progress::-webkit-progress-bar {
  border-radius: var(--standard-border-radius);
  background-color: var(--accent-bg);
}

progress::-webkit-progress-value {
  border-radius: var(--standard-border-radius);
  background-color: var(--accent);
}

progress::-moz-progress-bar {
  border-radius: var(--standard-border-radius);
  background-color: var(--accent);
  transition-property: width;
  transition-duration: 0.3s;
}

progress:indeterminate::-moz-progress-bar {
  background-color: var(--accent-bg);
}

dialog {
  background-color: var(--bg);
  color: var(--text);
  max-width: 40rem;
  margin: auto;
}

dialog::backdrop {
  background-color: var(--bg);
  opacity: 0.8;
}

@media only screen and (max-width: 720px) {
  dialog {
    max-width: calc(100vw - 2rem);
  }
}

/* Superscript & Subscript */
/* Prevent scripts from affecting line-height. */
sup,
sub {
  vertical-align: baseline;
  position: relative;
}

sup {
  top: -0.4em;
}

sub {
  top: 0.3em;
}

/* Classes for notices */
.notice {
  background: var(--accent-bg);
  border: var(--border-width) solid var(--border);
  border-radius: var(--standard-border-radius);
  padding: 1.5rem;
  margin: 2rem 0;
}

div.notice p:first-of-type {
  margin-top: 0;
}

div.notice p:last-of-type {
  margin-bottom: 0;
}

/* Layouts */
.lists {
  display: flex;
  gap: 2rem;
  justify-content: space-around;
  font-size: 0.9rem;

  > div {
    display: flex;
    flex-direction: column;
  }
}

div.group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2rem;

  > div {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
}

nav.tabs {
  display: flex;
  gap: 2px;

  a {
    padding: 0 1rem;
    border-bottom: 2px solid var(--border);
    color: var(--text);
  }

  a.target {
    border-bottom: 2px solid var(--accent);
  }
}

nav.tabs,
p.details {
  padding: 0 1rem;
}

p.details {
  display: none;

  &.target {
    display: inherit;
  }
}

.doc-page {
  border: 1px solid var(--border);
  box-shadow: 2px 2px 5px hsl(0, 0%, 85%);
}