/* blood-custom.css — the deck theme for slides.nlpia.org.
 *
 * This is the stock reveal.js "blood" theme with a project OVERRIDES block
 * appended at the end. It is wired up via `slides.theme` in mkslides.yml,
 * which is the only CSS path mkslides actually copies into the build.
 * (A `plugins: extra_css:` entry is emitted as a <link> but never copied,
 * which is why the previous slides/custom.css silently 404ed.)
 *
 * Edit the OVERRIDES block at the bottom; leave the theme body untouched so
 * it stays diffable against the upstream blood.css that mkslides ships.
 */

/**
 * Blood theme for reveal.js
 * Author: Walther http://github.com/Walther
 *
 * Designed to be used with highlight.js theme
 * "monokai_sublime.css" available from
 * https://github.com/isagalaev/highlight.js/
 *
 * For other themes, change $codeBackground accordingly.
 *
 */
@import url(https://fonts.googleapis.com/css?family=Ubuntu:300,700,300italic,700italic);
section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
  color: #222;
}

/*********************************************
 * GLOBAL STYLES
 *********************************************/
:root {
  --r-background-color: #222;
  --r-main-font: Ubuntu, sans-serif;
  --r-main-font-size: 40px;
  --r-main-color: #eee;
  --r-block-margin: 20px;
  --r-heading-margin: 0 0 20px 0;
  --r-heading-font: Ubuntu, sans-serif;
  --r-heading-color: #eee;
  --r-heading-line-height: 1.2;
  --r-heading-letter-spacing: normal;
  --r-heading-text-transform: uppercase;
  --r-heading-text-shadow: 2px 2px 2px #222;
  --r-heading-font-weight: normal;
  --r-heading1-text-shadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0, 0, 0, 0.1), 0 0 5px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.3), 0 3px 5px rgba(0, 0, 0, 0.2), 0 5px 10px rgba(0, 0, 0, 0.25), 0 20px 20px rgba(0, 0, 0, 0.15);
  --r-heading1-size: 3.77em;
  --r-heading2-size: 2.11em;
  --r-heading3-size: 1.55em;
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #a23;
  --r-link-color-dark: rgb(144.5, 28.9, 43.35);
  --r-link-color-hover: rgb(214.2, 51, 71.4);
  --r-selection-background-color: #a23;
  --r-selection-color: #fff;
  --r-overlay-element-bg-color: 240, 240, 240;
  --r-overlay-element-fg-color: 0, 0, 0;
}

.reveal-viewport {
  background: #222;
  background-color: var(--r-background-color);
}

.reveal {
  font-family: var(--r-main-font);
  font-size: var(--r-main-font-size);
  font-weight: normal;
  color: var(--r-main-color);
}

.reveal ::selection {
  color: var(--r-selection-color);
  background: var(--r-selection-background-color);
  text-shadow: none;
}

.reveal ::-moz-selection {
  color: var(--r-selection-color);
  background: var(--r-selection-background-color);
  text-shadow: none;
}

.reveal .slides section,
.reveal .slides section > section {
  line-height: 1.3;
  font-weight: inherit;
}

/*********************************************
 * HEADERS
 *********************************************/
.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  margin: var(--r-heading-margin);
  color: var(--r-heading-color);
  font-family: var(--r-heading-font);
  font-weight: var(--r-heading-font-weight);
  line-height: var(--r-heading-line-height);
  letter-spacing: var(--r-heading-letter-spacing);
  text-transform: var(--r-heading-text-transform);
  text-shadow: var(--r-heading-text-shadow);
  word-wrap: break-word;
}

.reveal h1 {
  font-size: var(--r-heading1-size);
}

.reveal h2 {
  font-size: var(--r-heading2-size);
}

.reveal h3 {
  font-size: var(--r-heading3-size);
}

.reveal h4 {
  font-size: var(--r-heading4-size);
}

.reveal h1 {
  text-shadow: var(--r-heading1-text-shadow);
}

/*********************************************
 * OTHER
 *********************************************/
.reveal p {
  margin: var(--r-block-margin) 0;
  line-height: 1.3;
}

/* Remove trailing margins after titles */
.reveal h1:last-child,
.reveal h2:last-child,
.reveal h3:last-child,
.reveal h4:last-child,
.reveal h5:last-child,
.reveal h6:last-child {
  margin-bottom: 0;
}

/* Ensure certain elements are never larger than the slide itself */
.reveal img,
.reveal video,
.reveal iframe {
  max-width: 95%;
  max-height: 95%;
}

.reveal strong,
.reveal b {
  font-weight: bold;
}

.reveal em {
  font-style: italic;
}

.reveal ol,
.reveal dl,
.reveal ul {
  display: inline-block;
  text-align: left;
  margin: 0 0 0 1em;
}

.reveal ol {
  list-style-type: decimal;
}

.reveal ul {
  list-style-type: disc;
}

.reveal ul ul {
  list-style-type: square;
}

.reveal ul ul ul {
  list-style-type: circle;
}

.reveal ul ul,
.reveal ul ol,
.reveal ol ol,
.reveal ol ul {
  display: block;
  margin-left: 40px;
}

.reveal dt {
  font-weight: bold;
}

.reveal dd {
  margin-left: 40px;
}

.reveal blockquote {
  display: block;
  position: relative;
  width: 70%;
  margin: var(--r-block-margin) auto;
  padding: 5px;
  font-style: italic;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
}

.reveal blockquote p:first-child,
.reveal blockquote p:last-child {
  display: inline-block;
}

.reveal q {
  font-style: italic;
}

.reveal pre {
  display: block;
  position: relative;
  width: 90%;
  margin: var(--r-block-margin) auto;
  text-align: left;
  font-size: 0.55em;
  font-family: var(--r-code-font);
  line-height: 1.2em;
  word-wrap: break-word;
  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
}

.reveal code {
  font-family: var(--r-code-font);
  text-transform: none;
  tab-size: 2;
}

.reveal pre code {
  display: block;
  padding: 5px;
  overflow: auto;
  max-height: 400px;
  word-wrap: normal;
}

.reveal .code-wrapper {
  white-space: normal;
}

.reveal .code-wrapper code {
  white-space: pre;
}

.reveal table {
  margin: auto;
  border-collapse: collapse;
  border-spacing: 0;
}

.reveal table th {
  font-weight: bold;
}

.reveal table th,
.reveal table td {
  text-align: left;
  padding: 0.2em 0.5em 0.2em 0.5em;
  border-bottom: 1px solid;
}

.reveal table th[align=center],
.reveal table td[align=center] {
  text-align: center;
}

.reveal table th[align=right],
.reveal table td[align=right] {
  text-align: right;
}

.reveal table tbody tr:last-child th,
.reveal table tbody tr:last-child td {
  border-bottom: none;
}

.reveal sup {
  vertical-align: super;
  font-size: smaller;
}

.reveal sub {
  vertical-align: sub;
  font-size: smaller;
}

.reveal small {
  display: inline-block;
  font-size: 0.6em;
  line-height: 1.2em;
  vertical-align: top;
}

.reveal small * {
  vertical-align: top;
}

.reveal img {
  margin: var(--r-block-margin) 0;
}

/*********************************************
 * LINKS
 *********************************************/
.reveal a {
  color: var(--r-link-color);
  text-decoration: none;
  transition: color 0.15s ease;
}

.reveal a:hover {
  color: var(--r-link-color-hover);
  text-shadow: none;
  border: none;
}

.reveal .roll span:after {
  color: #fff;
  background: var(--r-link-color-dark);
}

/*********************************************
 * Frame helper
 *********************************************/
.reveal .r-frame {
  border: 4px solid var(--r-main-color);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}

.reveal a .r-frame {
  transition: all 0.15s linear;
}

.reveal a:hover .r-frame {
  border-color: var(--r-link-color);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
}

/*********************************************
 * NAVIGATION CONTROLS
 *********************************************/
.reveal .controls {
  color: var(--r-link-color);
}

/*********************************************
 * PROGRESS BAR
 *********************************************/
.reveal .progress {
  background: rgba(0, 0, 0, 0.2);
  color: var(--r-link-color);
}

/*********************************************
 * PRINT BACKGROUND
 *********************************************/
@media print {
  .backgrounds {
    background-color: var(--r-background-color);
  }
}
.reveal p {
  font-weight: 300;
  text-shadow: 1px 1px #222;
}

section.has-light-background p, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4 {
  text-shadow: none;
}

.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  font-weight: 700;
}

.reveal p code {
  background-color: #23241f;
  display: inline-block;
  border-radius: 7px;
}

.reveal small code {
  vertical-align: baseline;
}

/*********************************************
 * PROJECT OVERRIDES
 *
 * The :root and code-block rules below are no-ops matching stock blood.
 * The image rules at the bottom are NOT -- they centre images, which stock
 * blood does not do. Uncomment or change a line to take effect next build.
 *
 * Full variable list: see the :root block near the top of this file.
 *********************************************/

:root {
  /* Body text. Heading sizes are em-based relative to this, so changing it
   * rescales the whole deck proportionally. */
  --r-main-font-size: 40px;   /* previously attempted, never applied: 32px */

  /* Headings. Values below are the stock blood sizes.
   * The old unused custom-blood.css instead wanted: 3em / 2em / 1.65em / 1.25em */
  /* --r-heading1-size: 3.77em; */
  /* --r-heading2-size: 2.11em; */
  /* --r-heading3-size: 1.55em; */
  /* --r-heading4-size: 1em;    */
}

/* Code blocks. Stock blood: font-size 0.55em, max-height 400px, tab-size 2.
 * slides/custom.css wanted max-height 800px; custom-blood.css wanted
 * font-size 1em, max-height 600px, tab-size 4. None of these ever applied. */
/* .reveal pre      { font-size: 0.55em; tab-size: 2; } */
/* .reveal pre code { max-height: 400px; } */

/* Images.
 *
 * On screen reveal leaves images `display: inline`, so they are already centred
 * by the inherited `text-align: center` -- no rule needed for that. The
 * `display:block; margin:15px 0` rule in reveal.css lives inside @media print,
 * where zero horizontal margins would pin images left on PDF export; the rule
 * below restores centring there. Same specificity as reveal's, and this file
 * loads later, so it wins. (Media queries do not affect specificity.)
 *
 * IMPORTANT: attributes from a `<!-- .element: ... -->` comment on its own line
 * attach to the enclosing <p>, NOT the <img>. Putting `width: 70%` there makes
 * the *paragraph* 70% wide and flush left, which reads as a left-shifted image.
 * Size the image through the paragraph (see .half) or use a raw <img> tag. */
html:not(.print-pdf) .reveal section img {
  margin-left: auto;
  margin-right: auto;
}

/* Width helper. Use as:
 *     ![](/diagram.png)
 *     <!-- .element: class="half" -->
 * Matches both the paragraph the class actually lands on and an <img> carrying
 * the class directly (raw HTML). Height stays auto to preserve aspect ratio. */
.reveal section p.half img,
.reveal section img.half { width: 50%; height: auto; }