/* This is the main CSS file for window decoration and Motif menus.
 *
 * Some of this is derived from CoW's CSS
 */

/* Shared defaults. */
:root {
  --desktop: #b8b8b8;
  --frame-dark: #003600;
  --frame: #006400;
  --frame-light: #3a963a;
  --frame-shine: #78c478;
  --title-highlight: #fff;
  --title-shadow: #606060;
  --paper: #f1eedf;
  --ink: #202426;
  --white: #fff;
  --amber: #d79921;
  --accent: #285e60;
  --accent-paper: #dfe9e3;
  --mono: "DejaVu Sans Mono", "Liberation Mono", monospace;
  --sans: "DejaVu Sans", "Liberation Sans", Arial, sans-serif;
}


/* Green is also the fallback when JavaScript is unavailable. */
:root[data-window-palette="blue"] {
  --frame: #244c78;
  --frame-dark: #142c48;
  --frame-light: #527ba7;
  --frame-shine: #96b4d4;
  --title-shadow: var(--frame-dark);
}
:root[data-window-palette="teal"] {
  --frame: #235f62;
  --frame-dark: #123638;
  --frame-light: #4b9091;
  --frame-shine: #92c5c1;
  --title-shadow: var(--frame-dark);
}
:root[data-window-palette="plum"] {
  --frame: #654468;
  --frame-dark: #39263d;
  --frame-light: #946d98;
  --frame-shine: #c6a5c9;
  --title-shadow: var(--frame-dark);
}
:root[data-window-palette="burgundy"] {
  --frame: #7b3548;
  --frame-dark: #481e2a;
  --frame-light: #ae6377;
  --frame-shine: #d6a0ac;
  --title-shadow: var(--frame-dark);
}
:root[data-window-palette="ochre"] {
  --frame: #76521e;
  --frame-dark: #45300f;
  --frame-light: #a78243;
  --frame-shine: #d4b778;
  --title-shadow: var(--frame-dark);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background-color: var(--desktop);
  font-family: var(--sans);
  line-height: 1.6;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.6rem 0.9rem;
  color: var(--white);
  background: var(--frame);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

code,
pre {
  font-family: var(--mono);
}

/* CoW window chrome. */
.window {
  --window-frame: var(--frame);
  --window-frame-dark: var(--frame-dark);
  --window-frame-shine: var(--frame-shine);
  --window-title-ink: #fff;
  --window-title-highlight: var(--title-highlight);
  --window-title-shadow: var(--title-shadow);
  position: relative;
  margin: 0 0 1rem;
  padding: 6px;
  outline: 1px solid #111d1e;
  background: var(--window-frame);
  box-shadow:
    inset 2px 2px 0 var(--window-frame-shine),
    inset -2px -2px 0 var(--window-frame-dark);
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 0;
  height: 22px;
  margin-bottom: 0;
  color: var(--window-title-ink);
  background: var(--window-frame);
  font-family: "Bitstream Vera Sans", "DejaVu Sans", sans-serif;
  font-size: 11pt;
  font-weight: 700;
  line-height: 1;
}

.window-title {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: none;
  min-width: 0;
  height: 22px;
  margin: 0;
  padding: 0 0.4rem;
  overflow: hidden;
  flex: 1;
  font: inherit;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
  box-shadow:
    inset 1px 1px 0 var(--window-title-highlight),
    inset -1px -1px 0 var(--window-title-shadow);
}

.titlebar-button {
  position: relative;
  width: 22px;
  height: 22px;
  padding: 0;
  flex: 0 0 22px;
  border: 0;
  border-radius: 0;
  appearance: none;
  background: transparent;
  cursor: pointer;
  box-shadow:
    inset 1px 1px 0 var(--window-title-highlight),
    inset -1px -1px 0 var(--window-title-shadow);
}

.titlebar-button:hover,
.titlebar-button:focus-visible {
  z-index: 1;
  outline: 1px solid var(--amber);
  outline-offset: -3px;
}

.titlebar-button:active {
  box-shadow:
    inset 1px 1px 0 var(--window-title-shadow),
    inset -1px -1px 0 var(--window-title-highlight);
}

.titlebar-button.shade:active::before,
.titlebar-button.shade[aria-expanded="false"]::before {
  border-top-color: var(--window-title-shadow);
  border-right-color: var(--window-title-highlight);
  border-bottom-color: var(--window-title-highlight);
  border-left-color: var(--window-title-shadow);
}

.titlebar-button.minimise:active::before,
.titlebar-button.minimise[aria-expanded="false"]::before {
  border-top-color: var(--window-title-shadow);
  border-right-color: var(--window-title-highlight);
  border-bottom-color: var(--window-title-highlight);
  border-left-color: var(--window-title-shadow);
}

.titlebar-button.maximise:active::before,
.titlebar-button.maximise[aria-pressed="true"]::before {
  border-top-color: var(--window-title-shadow);
  border-right-color: var(--window-title-highlight);
  border-bottom-color: var(--window-title-highlight);
  border-left-color: var(--window-title-shadow);
}

.titlebar-button.shade::before {
  position: absolute;
  top: 9px;
  left: 6px;
  width: 10px;
  height: 4px;
  border-top: 1px solid var(--window-title-highlight);
  border-right: 1px solid var(--window-title-shadow);
  border-bottom: 1px solid var(--window-title-shadow);
  border-left: 1px solid var(--window-title-highlight);
  content: "";
}

.titlebar-button.minimise::before {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 6px;
  height: 6px;
  border-top: 1px solid var(--window-title-highlight);
  border-right: 1px solid var(--window-title-shadow);
  border-bottom: 1px solid var(--window-title-shadow);
  border-left: 1px solid var(--window-title-highlight);
  content: "";
}

.titlebar-button.maximise::before {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 14px;
  height: 14px;
  border-top: 1px solid var(--window-title-highlight);
  border-right: 1px solid var(--window-title-shadow);
  border-bottom: 1px solid var(--window-title-shadow);
  border-left: 1px solid var(--window-title-highlight);
  content: "";
}

.window-content {
  min-width: 0;
  overflow-wrap: anywhere;
  background: var(--paper);
  box-shadow:
    inset 2px 2px 0 #aaa697,
    inset -2px -2px 0 #fff;
}

/* Motif application client. */
.xm-demo-page {
  min-height: 100vh;
}
.xm-main {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0.75rem 0 1rem;
}
.xm-window {
  margin: 0 auto 2rem;
}
.xm-client {
  background: #bdbdb3;
  font-size: 10pt;
}

.xm-menubar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1px;
  min-height: 32px;
  padding: 3px 7px;
  border: 0;
  border-bottom: 2px solid #77766e;
  background: #bdbdb3;
  font-family: var(--sans);
}
.xm-menubar a,
.xm-menu summary {
  padding: 5px 10px;
  color: #151515;
  text-decoration: none;
}
.xm-menu-help {
  margin-inline-start: auto;
}
.xm-menubar a:hover,
.xm-menubar a:focus-visible,
.xm-menu summary:hover,
.xm-menu summary:focus-visible,
.xm-menu[open] > summary {
  color: #fff;
  outline: 0;
  background: var(--frame);
  box-shadow:
    inset 2px 2px 0 var(--frame-light),
    inset -2px -2px 0 var(--frame-dark);
}
.xm-menu {
  position: relative;
}
.xm-menu summary {
  cursor: pointer;
  list-style: none;
}
.xm-menu summary::-webkit-details-marker {
  display: none;
}
.xm-menu-items {
  position: absolute;
  z-index: 20;
  inset-inline-start: 0;
  top: 100%;
  width: 250px;
  max-width: calc(100vw - 40px);
  margin: 0;
  padding: 4px;
  list-style: none;
  background: #bdbdb3;
  border: 2px solid #77766e;
  box-shadow: inset 1px 1px #fff, 3px 3px #77766e;
}
.xm-menu-items a {
  display: block;
}
.xm-menu-items a[aria-current="page"] {
  font-weight: bold;
  text-decoration: underline;
}
.xm-menu:last-of-type .xm-menu-items {
  inset-inline-start: auto;
  inset-inline-end: 0;
}
.xm-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px;
  border-bottom: 2px solid #77766e;
  background: #bdbdb3;
}
.xm-button {
  display: inline-block;
  padding: 0.42rem 0.8rem;
  border: 2px solid #858279;
  color: #202426;
  background: #ddd8c6;
  font-family: var(--mono);
  font-size: 9.25pt;
  font-weight: 700;
  text-decoration: none;
  box-shadow:
    inset 2px 2px 0 #fff,
    inset -2px -2px 0 #6f6c63;
}
.xm-button:hover,
.xm-button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.xm-button:active {
  box-shadow:
    inset 2px 2px 0 #5d625e,
    inset -2px -2px 0 #fff;
  transform: translate(1px, 1px);
}
.xm-default {
  outline: 2px solid #303030;
  outline-offset: 2px;
}
.xm-location {
  min-width: 0;
  flex: 1;
  padding: 0.42rem 0.65rem;
  overflow: hidden;
  white-space: nowrap;
  color: #202426;
  background: #f1eedf;
  border: 2px solid;
  border-color: #77766e #fff #fff #77766e;
  font-family: var(--mono);
  font-size: 9.25pt;
}
.xm-workarea {
  min-height: 560px;
  padding: clamp(1rem, 3vw, 2rem);
  color: #202426;
  background: #f1eedf;
  box-shadow:
    inset 2px 2px 0 #aaa697,
    inset -2px -2px 0 #fff;
}
.xm-status {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0.55rem;
  border-top: 2px solid #fff;
  background: #bdbdb3;
  font-family: var(--mono);
  font-size: 9.25pt;
}
.xm-content {
  font-size: 12pt;
  max-width: 900px;
  margin: 0 auto;
}
.xm-hero,
.xm-card,
.xm-group {
  border: 2px solid #aaa697;
  background: #e6e2d2;
  box-shadow:
    inset 2px 2px 0 #fff,
    inset -2px -2px 0 #8c887c;
}
.xm-hero {
  padding: clamp(1.3rem, 3vw, 2.2rem);
}
.xm-kicker {
  margin: 0 0 0.55rem;
  color: #376d70;
  font-family: var(--mono);
  font-size: 8.5pt;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.xm-content h1 {
  color: var(--accent);
  max-width: 780px;
  letter-spacing: -0.045em;
  margin: 0 0 0.8rem;
  font-size: 16.5pt;
  line-height: 1.2;
}
.xm-content h2 {
  margin-top: 1.8rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
  font-size: 13.5pt;
}
.xm-content h3 {
  font-size: 12.75pt;
}
.xm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.25rem;
}
.xm-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin: 1rem 0;
}
.xm-topic .xm-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
}
/* Muted section colours keep the raised Motif surfaces distinct. */
.xm-topic[data-topic="learn"],
.xm-document[data-topic="learn"] {
  --accent: #285e60;
  --accent-paper: #dfe9e3;
}
.xm-topic[data-topic="toolkits"],
.xm-document[data-topic="toolkits"] {
  --accent: #354f79;
  --accent-paper: #e0e6ee;
}
.xm-topic[data-topic="projects"],
.xm-document[data-topic="projects"] {
  --accent: #674660;
  --accent-paper: #ebe1e7;
}
.xm-topic[data-topic="resources"],
.xm-document[data-topic="resources"] {
  --accent: #745321;
  --accent-paper: #eee4cf;
}
.xm-topic > p {
  margin-top: 8px;
}
.xm-home-about {
  margin-top: 24px;
}
.xm-card {
  display: grid;
  gap: 0.3rem;
  padding: 1rem;
  color: #202426;
  background: var(--accent-paper);
  border-top: 5px solid var(--accent);
  text-decoration: none;
}
.xm-card b {
  color: var(--accent);
}
.xm-card:hover,
.xm-card:focus-visible {
  color: #fff;
  background: var(--accent);
  box-shadow:
    inset 2px 2px 0 #ffffff80,
    inset -2px -2px 0 #00000050;
}
.xm-card:hover b,
.xm-card:focus-visible b {
  color: inherit;
}
.xm-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.xm-card span {
  font-size: 12pt;
}
.xm-group {
  padding: 1rem;
}
.xm-group legend {
  padding: 0 0.45rem;
  background: #e6e2d2;
  font-weight: 700;
}
.xm-session {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.xm-session span {
  display: grid;
  gap: 0.2rem;
}
.xm-dochead {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 0.6rem;
  margin-bottom: 24px;
  padding: 18px;
  background: var(--accent-paper);
  border: 2px solid #aaa697;
  border-inline-start: 6px solid var(--accent);
  box-shadow:
    inset 1px 1px 0 #fff,
    inset -1px -1px 0 #8c887c;
}
.xm-dochead > span {
  color: var(--accent);
  font-size: 13.5pt;
}
.xm-dochead > div {
  min-width: 0;
}
.xm-section-label {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 9.25pt;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.xm-document h2 {
  padding: 8px 12px;
  border: 0;
  border-inline-start: 4px solid var(--accent);
  background: var(--accent-paper);
}
.xm-document h3 {
  color: var(--accent);
}
.xm-document li::marker {
  color: var(--accent);
}
.xm-document :not(pre) > code {
  padding: 1px 4px;
  background: var(--accent-paper);
}
.xm-lede {
  margin: 0;
  color: #596164;
  font-style: italic;
}
.xm-document a,
.xm-hero > p a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.xm-document a:hover,
.xm-hero > p a:hover {
  color: #674660;
}
.xm-document a:focus-visible,
.xm-hero > p a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.xm-document pre {
  overflow: auto;
  padding: 1rem;
  color: #24292e;
  /* Override the background emitted inline by Zola's highlighter. */
  background-color: #f1eedf !important;
  border: 1px solid #aaa697;
  border-inline-start: 4px solid var(--accent);
  font-family: var(--mono);
  line-height: 1.6;
}
.xm-document code {
  font-family: var(--mono);
}
.giallo-l {
  display: inline-block;
  min-height: 1lh;
  width: 100%;
}
.toolkit-example {
  margin: 20px 0;
}
.toolkit-example img {
  display: block;
  max-width: 100%;
  height: auto;
}
.toolkit-example figcaption {
  max-width: 650px;
  margin-top: 8px;
  font-size: 11pt;
  line-height: 1.5;
}
.xm-document .toolkit-example img {
  outline: 1px solid #aaa697;
  box-shadow: 3px 3px 0 #00000018;
}
.xm-document figcaption {
  padding: 10px 12px;
  border-inline-start: 3px solid var(--accent);
  background: var(--accent-paper);
}
.stack-diagram {
  margin: 20px 0;
}
.stack-diagram-scroll {
  overflow-x: auto;
  border: 1px solid #aaa697;
  background: #f2efdf;
}
.stack-diagram-scroll:focus-visible {
  outline: 2px solid var(--frame);
  outline-offset: 2px;
}
.stack-diagram img {
  display: block;
  width: 100%;
  min-width: 600px;
  height: auto;
}
.stack-diagram figcaption {
  margin-top: 8px;
  font-size: 11pt;
  line-height: 1.5;
}
.xm-document table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
.xm-document th,
.xm-document td {
  padding: 0.55rem;
  border: 1px solid #8c887c;
  text-align: left;
}
.xm-document th {
  color: var(--accent);
  background: var(--accent-paper);
}
.xm-document tbody tr:nth-child(even) {
  background: #f8f5e9;
}
.book-catalogue {
  max-width: 100%;
  overflow-x: auto;
}
.book-catalogue:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}
.book-catalogue table {
  min-width: 600px;
}
.book-catalogue td {
  vertical-align: top;
}
.book-catalogue th:first-child,
.book-catalogue td:first-child {
  width: 110px;
  text-align: center;
}
.book-catalogue th:nth-child(2) {
  width: 45%;
}
.book-cover {
  display: block;
  width: 90px;
  height: auto;
  max-height: 145px;
  object-fit: contain;
  margin: 0 auto 6px;
}
.xm-document blockquote {
  margin: 1rem 0;
  padding: 0.6rem 1rem;
  border-left: 6px solid var(--accent);
  background: var(--accent-paper);
}
@media (max-width: 650px) {
  .xm-main {
    width: min(100% - 1rem, 1180px);
  }
  .xm-grid,
  .xm-session {
    grid-template-columns: 1fr;
  }
  .xm-toolbar {
    flex-wrap: wrap;
  }
  .xm-location {
    flex-basis: 100%;
  }
  .xm-menu {
    position: static;
  }
  .xm-menubar .xm-menu .xm-menu-items {
    inset-inline-start: 7px;
    inset-inline-end: 7px;
    width: auto;
    max-width: none;
  }
  .xm-menubar a,
  .xm-menu summary {
    padding: 5px 7px;
  }
}

@media (max-width: 590px) {
  .window {
    box-shadow:
      inset 2px 2px 0 var(--frame-shine),
      inset -2px -2px 0 var(--frame-dark);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}