/* orior - Copyright (C) 2026 Douglas Quigg (dstroy0) <dquigg123@gmail.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-Commercial OR LicenseRef-Educational
 *
 * The site's palette, its type and the landing page. mkdocs.yml names the palette "custom", and
 * these variables are what custom resolves to, one set per scheme. mkdocs.yml loads the faces.
 */

/* Ink is the header and the hero, signal marks what is exact, the link colour is the one colour a
 * reader acts on, and in the dark scheme violet answers the pointer. */
:root {
  --orior-ink: #1d1850;
  --orior-ink-2: #261f5e;
  --orior-signal: #6fdcb4;
  --orior-signal-deep: #0f7a53;
  --orior-head-font: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --orior-radius: 0.5rem;
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #fbfbfe;
  --md-default-fg-color: #17163a;
  --md-default-fg-color--light: rgba(23, 22, 58, 0.68);
  --md-default-fg-color--lighter: rgba(23, 22, 58, 0.36);
  --md-default-fg-color--lightest: rgba(23, 22, 58, 0.1);
  --md-primary-fg-color: var(--orior-ink);
  --md-primary-fg-color--light: var(--orior-ink-2);
  --md-primary-fg-color--dark: #100d30;
  --md-primary-bg-color: #f3f2fb;
  --md-accent-fg-color: #0f7a53;
  --md-typeset-a-color: #3346d3;
  --md-code-bg-color: #f0eff8;
  --md-code-fg-color: #262356;
  --orior-tint: #efeef9;
}

[data-md-color-scheme="slate"] {
  --md-hue: 245;
  --md-default-bg-color: #131331;
  --md-default-fg-color: #e4e3f5;
  --md-default-fg-color--light: rgba(228, 227, 245, 0.7);
  --md-default-fg-color--lighter: rgba(228, 227, 245, 0.4);
  --md-default-fg-color--lightest: rgba(228, 227, 245, 0.1);
  --md-primary-fg-color: var(--orior-ink);
  --md-primary-fg-color--light: var(--orior-ink-2);
  --md-primary-fg-color--dark: #0a0822;
  --md-accent-fg-color: #b49cff;
  --md-typeset-a-color: #8ab8ff;
  --md-code-bg-color: #1b1b3d;
  --md-code-fg-color: #e0dff5;
  --orior-tint: #1c1940;
}

/* Header and tabs: one ink band, with a signal rule under it. */
.md-header {
  border-bottom: 2px solid var(--orior-signal);
  box-shadow: none;
}

.md-header[data-md-state="shadow"],
.md-header--shadow {
  box-shadow: 0 0.6rem 1.2rem -1rem rgba(16, 13, 48, 0.6);
}

.md-tabs {
  background-color: var(--md-primary-fg-color);
}

.md-tabs__link {
  font-family: var(--orior-head-font);
  font-weight: 500;
  letter-spacing: 0.01em;
  opacity: 0.72;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  opacity: 1;
  color: #ffffff;
}

.md-tabs__link--active {
  box-shadow: inset 0 -2px 0 var(--orior-signal);
}

.md-header__title {
  font-family: var(--orior-head-font);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.md-search__form {
  border-radius: var(--orior-radius);
}

/* Where the page links show as a row, they sit in the header row itself, centered on the page, and
 * the bar is one line. The page title in the header gives up its place to them and keeps its width,
 * which holds the search at the right, and the repository link there is its mark alone. */
@media screen and (min-width: 76.25em) {
  .md-header {
    position: sticky;
  }

  .md-tabs {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2.4rem;
    background-color: transparent;
    pointer-events: none;
  }

  /* The row spans the bar, so it takes no clicks itself: only the page links in it do, and the logo,
   * the scheme toggle, the search and the repository link under it stay reachable. */
  .md-tabs__list {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 2.4rem;
    margin: 0;
    pointer-events: none;
  }

  .md-tabs__item {
    height: auto;
    padding: 0 0.6rem;
    pointer-events: auto;
  }

  .md-tabs__link {
    margin-top: 0;
    padding: 0.3rem 0;
  }

  .md-header__title {
    visibility: hidden;
  }

  .md-header__source {
    width: auto;
    margin-left: 0.4rem;
  }

  .md-header__source .md-source__repository {
    display: none;
  }
}

/* The foot of the page: one centered line, the copyright, the credit and the repository link. */
.md-footer-meta {
  background-color: var(--md-primary-fg-color--dark);
}

.md-footer-meta__inner {
  justify-content: center;
  align-items: center;
  column-gap: 0.8rem;
  padding: 0.15rem 0;
}

.md-footer-meta .md-copyright {
  width: auto;
  margin: 0;
  padding: 0.25rem 0;
  font-size: 0.55rem;
  text-align: center;
}

.md-footer-meta .md-copyright__highlight {
  display: inline;
  margin-right: 0.4rem;
}

.md-footer-meta .md-social {
  display: flex;
  align-items: center;
  padding: 0;
}

.md-footer-meta .md-social__link {
  display: flex;
  align-items: center;
  width: 0.8rem;
  height: 0.8rem;
}

.md-footer-meta .md-social__link svg {
  vertical-align: baseline;
}

/* Body type: a serif for reading at length, set beside the serif of the math. */
.md-typeset {
  font-size: 0.84rem;
  line-height: 1.72;
  font-feature-settings: "kern", "liga", "onum";
}

/* Headings in the sans, tight and heavy. The page heading and each section heading are centered. */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  font-family: var(--orior-head-font);
  color: var(--md-default-fg-color);
}

.md-content .md-typeset h1,
.md-content .md-typeset h2 {
  text-align: center;
}

.md-content .md-typeset h1 {
  font-size: 2.1em;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.md-content .md-typeset h2 {
  margin-top: 2.2em;
  font-size: 1.45em;
  font-weight: 650;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

/* The rule under a section heading is short and centered under it, in the signal colour. */
.md-content .md-typeset h2::after {
  content: "";
  display: block;
  width: 2.2rem;
  height: 2px;
  margin: 0.55rem auto 0;
  background-color: var(--orior-signal);
}

.md-typeset h3 {
  font-size: 1.12em;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.md-typeset a {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, currentColor 35%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: text-decoration-color 0.15s ease;
}

.md-typeset a:hover {
  text-decoration-color: currentColor;
}

.md-typeset .headerlink,
.md-typeset .md-button,
.md-typeset .grid.cards a,
.md-typeset .md-content__button {
  text-decoration: none;
}

.md-typeset :focus-visible,
.md-header :focus-visible,
.md-nav :focus-visible {
  outline: 2px solid var(--orior-signal);
  outline-offset: 2px;
  border-radius: 2px;
}

.md-typeset code {
  border-radius: 0.25rem;
  font-size: 0.82em;
}

.md-typeset pre > code {
  border-radius: var(--orior-radius);
}

.md-typeset blockquote {
  border-left: 3px solid var(--orior-signal);
  color: var(--md-default-fg-color--light);
}

/* The side navigation and the table of contents, in the heading face. */
.md-nav {
  font-family: var(--orior-head-font);
}

.md-nav__title {
  font-weight: 700;
  color: var(--md-default-fg-color);
}

.md-nav__link--active {
  font-weight: 600;
}

.md-nav--secondary .md-nav__link--active {
  color: var(--md-typeset-a-color);
}

/* Tables: an ink rule above and below, a quiet head, readable rows. */
.md-typeset table:not([class]) {
  border: none;
  border-top: 2px solid var(--md-default-fg-color);
  border-bottom: 2px solid var(--md-default-fg-color);
  border-radius: 0;
  font-size: 0.74rem;
}

.md-typeset table:not([class]) th {
  font-family: var(--orior-head-font);
  font-weight: 600;
  background-color: transparent;
  border-bottom: 1px solid var(--md-default-fg-color--lighter);
}

.md-typeset table:not([class]) td {
  border-top: 1px solid var(--md-default-fg-color--lightest);
}

.md-typeset table:not([class]) td:first-child code {
  white-space: nowrap;
}

.md-typeset table:not([class]) tr:hover {
  background-color: var(--orior-tint);
  box-shadow: none;
}

/* Admonitions take the page's palette. */
.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--orior-radius);
  box-shadow: none;
  font-size: 0.78rem;
}

/* The landing page. The hero is the ink band the header opens into, and orior.js draws a lattice
 * across it: in order at the left, shuffled more and more toward the right. */
.orior-hero {
  position: relative;
  margin: 0 0 2.6rem;
  padding: 4rem 2.5rem 3.4rem;
  border-radius: 0.9rem;
  color: #f3f2fb;
  background-color: var(--orior-ink);
  background-image: radial-gradient(70% 90% at 50% 45%, var(--orior-ink) 35%, rgba(29, 24, 80, 0) 100%);
  overflow: hidden;
  isolation: isolate;
}

/* On the dark page the hero sits a step darker than the page, inside a hairline. */
[data-md-color-scheme="slate"] .orior-hero {
  background-color: #0f0d2e;
  background-image: radial-gradient(70% 90% at 50% 45%, #0f0d2e 35%, rgba(15, 13, 46, 0) 100%);
  box-shadow: inset 0 0 0 1px rgba(228, 227, 245, 0.09);
}

.orior-hero > * {
  position: relative;
  z-index: 1;
}

.md-typeset .orior-hero > .orior-lattice {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* The hero reads centered: the name and the lede on one line, the text and the buttons under them. */
.md-typeset .orior-hero {
  text-align: center;
}

.orior-title {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  column-gap: 1.1rem;
  margin: 0 0 1.1rem;
}

/* While the line beside the name comes together, each letter is its own box, and the beam is a thin
 * rule brightest at its head. orior.js adds both and takes both away when the line is home. */
.orior-word {
  white-space: nowrap;
}

/* The name and the line are held unseen from the first paint until orior.js takes them, so the page
 * never shows them plain and then hides them. Where the script does not run they appear when the
 * hold runs out. */
@keyframes orior-hold {
  from {
    visibility: hidden;
  }

  to {
    visibility: visible;
  }
}

.md-typeset .orior-title h1,
.md-typeset .orior-title .orior-lede {
  animation: orior-hold 0s linear 1.6s both;
}

/* A letter in its own box is set without the kerning or the ligatures of the text around it, so the
 * line is set the same way throughout: the letters land where the plain text puts them. */
.md-typeset .orior-title .orior-lede {
  font-kerning: none;
  font-variant-ligatures: none;
  font-feature-settings: "kern" 0, "liga" 0, "clig" 0, "calt" 0;
}

.orior-part {
  display: inline-block;
  will-change: transform;
}

.orior-beam {
  position: absolute;
  height: 2px;
  margin-top: -1px;
  border-radius: 1px;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, rgba(111, 220, 180, 0), #6fdcb4 70%, #ffffff);
  box-shadow: 0 0 10px 1px rgba(111, 220, 180, 0.7);
  pointer-events: none;
}

.md-typeset .orior-hero .orior-title h1,
.md-typeset .orior-hero .orior-title .orior-lede {
  margin: 0;
}

.md-typeset .orior-title .orior-lede::before {
  content: "";
  display: inline-block;
  width: 2px;
  height: 1.1em;
  margin-right: 1.1rem;
  vertical-align: -0.18em;
  background-color: var(--orior-signal);
}

.md-typeset .orior-hero h1 {
  margin: 0 0 0.8rem;
  font-size: 4.2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.055em;
  color: #ffffff;
}

.md-typeset .orior-hero h1::after {
  display: none;
}

.md-typeset .orior-hero .headerlink {
  display: none;
}

.md-typeset .orior-lede {
  max-width: 36rem;
  font-family: var(--orior-head-font);
  font-size: 1.2rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: #e8e6f7;
}

.md-typeset .orior-hero p:not(.orior-lede) {
  max-width: 34rem;
  margin: 0 auto 1.6rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: #bcb8e0;
}

.md-typeset .orior-hero .md-button {
  margin: 0.35rem 0.25rem 0;
  padding: 0.5em 1.1em;
  border: 1px solid rgba(230, 233, 245, 0.28);
  border-radius: 0.4rem;
  font-family: var(--orior-head-font);
  font-size: 0.72rem;
  font-weight: 600;
  color: #e8e6f7;
  background-color: rgba(29, 24, 80, 0.55);
  backdrop-filter: blur(2px);
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.md-typeset .orior-hero .md-button:hover {
  border-color: var(--orior-signal);
  background-color: rgba(111, 220, 180, 0.1);
  color: #ffffff;
}

.md-typeset .orior-hero .md-button--primary {
  border-color: var(--orior-signal);
  color: var(--orior-ink);
  background-color: var(--orior-signal);
}

.md-typeset .orior-hero .md-button--primary:hover {
  color: var(--orior-ink);
  background-color: #9ae8cb;
}

/* What came back: one measured number per tile, the number large and what it counts under it. The
 * tiles are columns of a table more than cards, so they share rules and no box. */
.orior-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 1.6rem;
  row-gap: 1.4rem;
  margin: 1.4rem 0 2.4rem;
}

.orior-stats > div {
  padding: 0.7rem 0 0;
  border-top: 2px solid var(--md-default-fg-color);
}

.md-typeset .orior-stats strong {
  display: block;
  font-family: var(--orior-head-font);
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--md-default-fg-color);
}

.md-typeset .orior-stats span {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--md-default-fg-color--light);
}

/* Cards: a tinted panel, the title in the heading face, and the whole panel is the link. The link's
 * box is stretched over the card, so a click anywhere on it goes where the link goes; the border
 * takes the signal colour under the pointer and around the focused link. */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  position: relative;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: var(--orior-radius);
  background-color: var(--orior-tint);
  box-shadow: none;
  transition: border-color 0.15s ease;
}

.md-typeset .grid.cards > ul > li:has(a):hover,
.md-typeset .grid.cards > ul > li:has(a:focus-visible),
.md-typeset .grid > .card:has(a):hover {
  border-color: var(--orior-signal);
  box-shadow: none;
}

.md-typeset .grid.cards > ul > li a::after,
.md-typeset .grid > .card a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.md-typeset .grid.cards > ul > li a:focus-visible,
.md-typeset .grid > .card a:focus-visible {
  outline: none;
}

/* The links in a card read as part of it: the title in the ink of the text, the link under it in
 * the heading face, quieter, with its arrow in the signal colour. */
.md-typeset .grid.cards a,
.md-typeset .grid.cards a:hover {
  color: var(--md-default-fg-color);
  text-decoration: none;
}

/* A title set on two lines, its second line centered under its first. */
.md-typeset .grid.cards a.orior-stacked {
  display: inline-block;
  vertical-align: top;
  text-align: center;
}

.md-typeset .grid.cards > ul > li > p:last-child > a:only-child {
  font-family: var(--orior-head-font);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--md-default-fg-color--light);
  transition: color 0.15s ease;
}

.md-typeset .grid.cards > ul > li:hover > p:last-child > a:only-child {
  color: var(--md-default-fg-color);
}

.md-typeset .grid.cards > ul > li > p:last-child > a:only-child .twemoji {
  color: var(--orior-signal-deep);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li > p:last-child > a:only-child .twemoji {
  color: var(--orior-signal);
}

.md-typeset .grid.cards > ul > li > hr {
  margin: 0.6rem 0;
  border-bottom-color: var(--md-default-fg-color--lightest);
}

.md-typeset .grid.cards strong {
  font-family: var(--orior-head-font);
  font-weight: 650;
  letter-spacing: -0.01em;
}

.md-typeset .grid.cards .lg {
  color: var(--orior-signal-deep);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards .lg {
  color: var(--orior-signal);
}

/* The landing page opens on the hero, with no source button beside it. */
.md-content__inner:has(.orior-hero) > .md-content__button {
  display: none;
}

@media screen and (max-width: 44.9375em) {
  .orior-hero {
    padding: 2.6rem 1.2rem 2.2rem;
    border-radius: 0.6rem;
  }

  .md-typeset .orior-hero h1 {
    font-size: 3rem;
  }

  .md-typeset .orior-title .orior-lede::before {
    display: none;
  }

  .orior-stats {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .md-typeset .orior-title h1,
  .md-typeset .orior-title .orior-lede {
    animation: none;
  }

  .md-typeset a,
  .md-typeset .orior-hero .md-button,
  .md-typeset .grid.cards > ul > li {
    transition: none;
  }
}