/**
 * dmws — the DoMoreWithSlides.com reveal.js theme.
 *
 * Derived from reveal.js' "white" theme by Hakim El Hattab (http://hakim.se),
 * with three deliberate changes and nothing else:
 *
 *   1. The Source Sans Pro @import is gone. We use the same system font stack
 *      as the main site, so the deck makes no webfont request. See
 *      docs/brand-guidelines.md — "no webfont request, no privacy footnote".
 *   2. The :root variables are the brand tokens from assets/css/styles.css,
 *      not the stock greys and blues.
 *   3. A prefers-color-scheme: dark block redefines those same variables, so
 *      the deck follows the OS the way the rest of the site does.
 *
 * Everything below the token blocks is stock reveal.js theme CSS, untouched,
 * and it is all expressed through the --r-* variables. Change a token here,
 * not a rule further down.
 *
 * Brand colours (sampled from logo.png — do not add a third):
 *   blue #4F81BD   purple #8064A2   deep blue #385D8A
 */
section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
  color: #fff;
}

/*********************************************
 * GLOBAL STYLES — light (default)
 *
 * Contrast, checked against --r-background-color #ffffff:
 *   --r-main-color    #24303f  13.0:1  body text        ✓ AA
 *   --r-heading-color #16202e  15.6:1  headings         ✓ AA
 *   --r-link-color    #385d8a   6.4:1  links            ✓ AA
 *   --r-link-color-hover #6b5189 6.6:1 link hover       ✓ AA
 * The raw brand blue #4F81BD is only 4.0:1 on white, so it never carries
 * text here — only borders, rules and decoration.
 *********************************************/
:root {
  --r-background-color: #ffffff;
  --r-main-font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial,
    sans-serif;
  --r-main-font-size: 30px;
  --r-main-color: #24303f;
  --r-block-margin: 20px;
  --r-heading-margin: 0 0 24px 0;
  --r-heading-font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue",
    Arial, sans-serif;
  --r-heading-color: #16202e;
  --r-heading-line-height: 1.15;
  --r-heading-letter-spacing: -0.02em;
  --r-heading-text-transform: none;
  --r-heading-text-shadow: none;
  --r-heading-font-weight: 700;
  --r-heading1-text-shadow: none;
  --r-heading1-size: 2.1em;
  --r-heading2-size: 1.45em;
  --r-heading3-size: 1.05em;
  --r-heading4-size: 0.9em;
  --r-code-font: "Cascadia Code", "SFMono-Regular", Consolas,
    "Liberation Mono", monospace;
  --r-link-color: #385d8a;
  --r-link-color-dark: #28405f;
  --r-link-color-hover: #6b5189;
  --r-selection-background-color: #3e6a9e;
  --r-selection-color: #ffffff;
  --r-overlay-element-bg-color: 0, 0, 0;
  --r-overlay-element-fg-color: 240, 240, 240;

  /* Deck-level tokens. These mirror assets/css/styles.css so slide furniture
     (cards, rules, muted text, markers) matches the web pages. */
  --d-blue: #4f81bd;
  --d-purple: #8064a2;
  --d-bg-alt: #f7f9fb;
  --d-bg-sunken: #eef2f6;
  --d-surface: #ffffff;
  --d-border: #dde3ea;
  --d-border-strong: #c3cad4;
  --d-muted: #566274;
  /* --d-accent is deliberately a step darker than the site's --accent
     (#4F81BD, only 4.03:1 on white): here it is only ever used for text, in the
     background-clip fallbacks. --d-accent-alt does mirror --accent-alt. */
  --d-accent: #3e6a9e;
  --d-accent-alt: #8064a2;
  --d-good: #1f7a52;
  --d-warn: #96601a;
  --d-shadow: 40 64 95;
}

/*********************************************
 * GLOBAL STYLES — dark
 *
 * Same tokens, re-pointed. Contrast against #12171f:
 *   --r-main-color    #dde3ea  13.4:1  ✓ AA
 *   --r-heading-color #f2f5f8  16.4:1  ✓ AA
 *   --r-link-color    #8db0dc   8.0:1  ✓ AA
 * Brand hues step one shade lighter (blue-500 / purple-500), for the reason
 * given in docs/brand-guidelines.md.
 *********************************************/
@media (prefers-color-scheme: dark) {
  :root {
    --r-background-color: #12171f;
    --r-main-color: #dde3ea;
    --r-heading-color: #f2f5f8;
    --r-link-color: #8db0dc;
    --r-link-color-dark: #6d99cd;
    --r-link-color-hover: #b79ed4;
    --r-selection-background-color: #3e6a9e;
    --r-selection-color: #ffffff;
    --r-overlay-element-bg-color: 240, 240, 240;
    --r-overlay-element-fg-color: 0, 0, 0;

    --d-blue: #6d99cd;
    --d-purple: #9a82b6;
    --d-bg-alt: #171d27;
    --d-bg-sunken: #1d242f;
    --d-surface: #1b222c;
    --d-border: #2e3846;
    --d-border-strong: #414d5e;
    --d-muted: #a3aebc;
    --d-accent: #8db0dc;
    --d-accent-alt: #9a82b6;
    --d-good: #5cc699;
    --d-warn: #e0ac62;
    --d-shadow: 0 0 0;
  }
}

.reveal-viewport {
  background: #ffffff;
  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);
  }
}

/*********************************************
 * DARK-MODE PATCHES
 *
 * The stock theme hard-codes a few rgba(0,0,0,…) values that assume a light
 * ground. These are the only rules below the token blocks that aren't stock —
 * they exist because those values can't be expressed as a --r-* variable.
 *********************************************/
@media (prefers-color-scheme: dark) {
  .reveal .progress {
    background: rgba(255, 255, 255, 0.16);
  }

  .reveal blockquote {
    background: rgba(255, 255, 255, 0.06);
    box-shadow: none;
  }

  .reveal pre {
    box-shadow: none;
  }
}