@font-face {
  font-display: fallback;
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 400;
  src: url("/assets/fonts/OpenSans-Regular.ttf");
}

@font-face {
  font-display: fallback;
  font-family: "Open Sans";
  font-style: italic;
  font-weight: 400;
  src: url("/assets/fonts/OpenSans-Italic.ttf");
}

@font-face {
  font-display: fallback;
  font-family: "Open Sans";
  font-style: bold;
  font-weight: 700;
  src: url("/assets/fonts/OpenSans-Bold.ttf");
}

* {
  box-sizing: border-box;
}

html {
  background: #c18b2a;
  background-attachment: fixed;
  background-image: url(/assets/textureGold.jpeg);
}

/*
 * Body
 */

body {
  color: var(--color-text);
  counter-reset: h2;
  display: grid;
  grid-template-columns: 100%;
  justify-content: center;
  margin: 0;
  min-height: 100vh;
  padding: 0;
  --color-canvas-subtle: hsl(47deg 53% 95%);
  --color-rule: #cfc294;
  --color-text: rgb(51, 51, 51);
}

/*
 * Stock elements
 */

h1,
h2,
h3 {
  text-wrap: balance;

  a {
    visibility: hidden;
  }

  &:hover {
    a {
      visibility: visible;
    }
  }
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.8rem;
  margin-top: 2em;
}

h3 {
  font-size: 1.4rem;
  margin-top: 1.5em;
}

.numberHeadings h2:before {
  counter-increment: h2;
  content: counter(h2) ". ";
}

/* .numberHeadings h3:before {
  counter-increment: h3;
  content: counter(h2) "." counter(h3) ". ";
} */

.markdown-body > :first-child,
.markdown-body > p:first-of-type {
  margin-top: 0;
}

.error {
  background: #fff5f7;
  border: 1px solid red;
  margin-bottom: 1em;
  padding: 1em;
  --color-canvas-subtle: transparent;
}

.error pre {
  padding: 0;
  margin: 16px 0 0 0;
}

#logo {
  align-self: start;
  display: none;
}

header {
  align-content: center;
  align-items: center;
  border-bottom: 1px solid var(--color-rule);
  color: #222e3e;
  display: grid;
}

header h1 {
  margin: 0;
}

.supertitle {
  font-weight: bold;
  margin: 0;
}

.subtitle {
  font-style: italic;
  margin-top: 0;
}

/*
 * Design elements
 */
#page {
  background: var(--color-page);
  box-shadow: 0 0 20px rgb(0 0 0 / 50%);
  display: grid;
  grid-template-columns: 100%;
  grid-template-rows: auto 1fr;
  margin: 1rem 0 5rem;
  max-width: 100%;
  --color-page: #fafafa;
  --grid-gap: 1rem;
  --grid-padding-horizontal: 1rem;
  --grid-padding-vertical: 1rem;
  --side-nav-width: 0;
}

#pageContent {
  display: grid;
  gap: var(--grid-gap);
  grid-template-columns: 100%;
  grid-template-rows: repeat(3, auto) 1fr;
  padding: var(--grid-padding-vertical) var(--grid-padding-horizontal);
  --grid-padding-vertical: 2rem;
}

img.origami {
  height: 100px; /* For Safari */
  margin: 0;
  max-height: 100px;
}

/*
 * Navigation
 */

#topNav {
  background: #222e3e;
  background-image: url(/assets/textureIndigo.jpeg);
  box-shadow: 0px 5px 0.5rem 0px rgb(0 0 0 / 25%);
  display: grid;
  grid-column: 1 / span 2;
  grid-template-columns: var(--side-nav-width) 1fr;
  padding: var(--grid-padding-vertical) var(--grid-padding-horizontal);
}

#topNav a {
  color: #eee;
}

#homeContainer {
  visibility: hidden;
}

.optional {
  display: none;
}

#navBar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

#topNav a,
nav a {
  text-decoration: none;
  white-space: nowrap;
}

#topNav a:hover,
nav a:hover {
  text-decoration: underline;
}

#topNav [aria-current] {
  color: white;
  font-weight: bold;
}

#sideBar {
  grid-column: 1; /* Baffled as to why this is necessary. */
}

#sideBar:has(li) {
  border-bottom: 1px solid var(--color-rule);
}

#sideBar > ul {
  display: grid;
  gap: 0 1em;
  grid-template-columns: repeat(auto-fit, minmax(150px, max-content));
  justify-content: space-between;
  padding-left: 0;
}

#sideBar li {
  list-style: none;
  margin-bottom: 0.5rem;
}

#sideBar [aria-current] {
  color: inherit;
}

#sideBar .noLink {
  color: #bbb;
}

/* Styles for markdown body content -- but not inside comic strips */
.markdown-body {
  > :is(img, iframe),
  > :not(comic-strip) :is(img, iframe) {
    max-width: 100%;
  }

  blockquote {
    border: none;
    color: inherit;
    padding: 0.5rem 2rem;
  }

  table {
    /* Try to prevent tables from overflowing page width on mobile */
    display: block;
    max-width: 100%;
    overflow-x: auto;
  }

  tr {
    vertical-align: top;
  }

  td {
    vertical-align: top;
  }

  th, td {
    padding-right: 1em;
  }

  figure {
    display: grid;
    gap: 3rem;
    justify-items: center;
    margin: 3rem 0;
  }

  .constrain {
    max-height: 50vmax;
    max-width: 50vmax;
  }

  figcaption {
    font-size: smaller;
    font-style: italic;
  }

  svg {
    height: inherit;
    max-height: 100%;
    max-width: 100%;
  }

  .video16x9 {
    aspect-ratio: 16 / 9;
    margin-top: 1em;
    margin-bottom: 1em;
    width: 100%;
  }

  /*
   * Code
   *
   * Don't mess with code in comic strips
   */

  > pre,
  > :not(comic-strip) pre {
    background-color: var(--color-canvas-subtle);
    border-radius: 6px;
    font-family: "Consolas", "Menlo", "Courier New", "Courier", monospace;
    font-size: 85%;
    line-height: 1.45;
    overflow: auto;
    padding: 16px;

    &.step {
      color: #555;
    }

    &.step b {
      color: black;
      font-weight: bold;
    }

    .hljs {
      background: inherit;
      color: inherit;
    }

    & code.hljs {
      padding: 0;
    }

    & code {
      white-space: pre-wrap;
    }
  }

  td pre {
    margin: 0;
    padding: 0;
  }

  > code,
  > :not(comic-strip) code {
    /* Approximate more recent GitHub styling for inline code */
    font-family: "Consolas", "Menlo", "Courier New", "Courier", monospace;
    background-color: var(--color-canvas-subtle);
    white-space: nowrap;

    &.hljs {
      padding: 0;
    }

    &.language-console,
    &.language-console .hljs-meta {
      color: #333;
      font-weight: normal;
    }

    &.language-console span {
      color: #222;
      font-weight: bold;
    }

    &:not(pre code) {
      border-radius: 6px;
      font-size: 85%;
      margin: 0;
      padding: .2em .4em;
    }
  }

  p code {
    white-space: break-spaces;
  }

  /*
  * Side-by-side layouts
  */
  .sideBySide {
    align-items: center;
    display: grid;
    gap: 2rem;
    grid-template-areas:
      "figure1"
      "caption1"
      "figure2"
      "caption2"
      "figure3"
      "caption3";
    justify-items: center;
    margin: 3em 0;
  }

  .sideBySide figure:nth-of-type(1) {
    grid-area: figure1;
  }
  .sideBySide figure:nth-of-type(2) {
    grid-area: figure2;
  }
  .sideBySide figure:nth-of-type(3) {
    grid-area: figure3;
  }

  .sideBySide figcaption:nth-of-type(1) {
    grid-area: caption1;
  }
  .sideBySide figcaption:nth-of-type(2) {
    grid-area: caption2;
  }
  .sideBySide figcaption:nth-of-type(3) {
    grid-area: caption3;
  }

  .sideBySide figure {
    margin: 0;
  }

  /*
  * Generated graph SVGs on page
  */
  g.graph polygon[fill="white"] {
    /* fill: transparent; */
  }

  g.node ellipse[fill="none"],
  g.node polygon[fill="none"] {
    fill: white;
  }

  > .screenshot,
  > :not(comic-strip) .screenshot {    border: 1px solid #ddd;
    max-height: 350px;
    max-width: 50%;
  }

  /*
  * Tutorial
  */
  .tutorialStep:before {
    content: "➤";
    color: var(--color-rule);
  }
}

/*
 * Architecture block diagram
 */
.blocks {
  display: grid;
  float: right;
  font-size: smaller;
  gap: 0.25rem;
  grid-template-columns: auto auto;
  margin-bottom: 1rem;
  margin-left: 1rem;
}

.blocks a {
  align-content: center;
  background: var(--color-rule);
  border: 1px solid var(--color-rule);
  color: white;
  display: grid;
  justify-content: center;
  padding: 0.25rem 0.5rem;
  text-decoration: none;
}

.blocks a:hover {
  filter: brightness(1.1);
}

.blocks [aria-current] {
  background: white;
  color: var(--color-text);
  font-weight: bold;
}

.blocks .optional {
  display: none;
}

.blocks a[href="proxy.php?url=https%3A%2F%2Fweborigami.org%2Fasync-tree%2F"],
.blocks a[href="proxy.php?url=https%3A%2F%2Fweborigami.org%2Fbuiltins%2F"],
.blocks a[href="proxy.php?url=https%3A%2F%2Fweborigami.org%2Fpattern%2F"] {
  grid-column: 1 / span 2;
}

/*
 * Responsive queries
 */

@media (min-width: 900px) {
  body {
    grid-template-columns: auto;
  }

  pre {
    white-space: pre-wrap;
  }

  #page {
    grid-template-columns: minmax(100%, 1080px);
    grid-template-rows: auto 1fr;
    --grid-gap: 1rem;
    --grid-padding-horizontal: 2.5rem;
    --side-nav-width: 180px;
  }

  #topNav {
    gap: var(--grid-gap);
  }

  #homeContainer {
    visibility: visible;
  }

  .optional {
    display: contents;
  }
  
  #pageContent {
    /* Given above columns for #page, not sure why we also need to specify 800px here. */
    grid-template-columns: var(--side-nav-width) minmax(auto, 800px);
    grid-template-rows: auto 1fr;
    --grid-padding-vertical: 2rem;
  }

  img.origami {
    align-self: center;
    filter: drop-shadow(0 5px 5px rgba(0, 0, 0, 0.25));
    height: 100px;
    margin: 1rem 0;
    max-width: 90%;
  }

  #navBar a[href="proxy.php?url=https%3A%2F%2Fweborigami.org%2F"],
  #sideBar a[href="proxy.php?url=https%3A%2F%2Fweborigami.org%2F"] {
    display: none;
  }

  #sideBar {
    grid-column: auto;
  }

  #sideBar ul {
    display: block;
  }

  #sideBar:has(li) {
    border-bottom: none;
  }

  header h1 {
    margin-bottom: inherit;
  }

  .blocks {
    grid-template-columns: 1fr 1fr;
    font-size: inherit;
  }
  .blocks a {
    padding: 0.5rem 1rem;
  }

  .sideBySide {
    grid-template-areas:
      "figure1 figure2 figure3"
      "caption1 caption2 caption3";
  }

  .split2to3 {
    grid-template-columns: 2fr 3fr;
  }

  figure {
    margin: 3rem 3rem 3rem 0;
  }

  .fullWidth {
    position: relative;
    left: calc(0px - var(--side-nav-width));
    width: calc(100% + var(--side-nav-width));
  }

  .tutorialStep:before {
    margin-left: -1.5em;
    position: absolute;
  }
}