inst/reveal.js-5.1.0/css/theme/source/ids.scss

/**
 * IDS theme for reveal.js
 *
 * By Marc Kupietz
 */


// Default mixins and settings -----------------
@import "../template/mixins";
@import "../template/settings";
// ---------------------------------------------


// Include theme-specific fonts
// NB: https://korap.ids-mannheim.de/font/{fira-condensed,libertinus}.css both
// return 404, so the condensed and bold faces never loaded and headings fell
// back to a regular-width, regular-weight face. Google Fonts serves the real
// Fira Sans Condensed incl. weights 700/800 (this is where the IDS reference
// decks get it from too); the others are kept for locally installed copies.
@import url('https://fonts.googleapis.com/css2?family=Fira+Sans+Condensed:wght@300;400;700;800&family=Fira+Sans:wght@200;300;400;700&family=Fira+Sans+Extra+Condensed:wght@300;700&display=swap');
@import url('https://code.cdn.mozilla.net/fonts/fira.css');
@import url('https://korap.ids-mannheim.de/font/libertinus.css');

$idsOrange: #f6a800;

// Override theme settings (see ../template/settings.scss)
$backgroundColor: #fff;

$mainColor: #222;
$headingColor: $idsOrange;

$mainFontSize: 42px;
$mainFont: 'Libertinus Serif', Helvetica, sans-serif;
$headingFont: 'Fira Sans Extra Condensed', 'Fira Sans Condensed', 'Fira Sans', Helvetica, sans-serif;
$headingTextShadow: none;
$headingLetterSpacing: 0.05ex;
$headingTextTransform: uppercase;
$headingFontWeight: 700;
$linkColor: #2a76dd;
$linkColorHover: lighten( $linkColor, 15% );
$selectionBackgroundColor: lighten( $linkColor, 25% );

$heading1Size: 2em;
$heading2Size: 1.35em;
$heading3Size: 0.9em;
$heading4Size: 0.7em;

$listBulletColor: $idsOrange;

// Change text colors against dark slide backgrounds
@include dark-bg-text-color(#fff);


// Theme template ------------------------------
@import "../template/theme";
// ---------------------------------------------

// Bar/logo sizes, expressed as fractions of the slide's own height (reveal.js
// exposes the configured slide size as --slide-width / --slide-height custom
// properties). Sizing relative to the slide rather than the raw viewport (vh
// units) keeps things pinned to the true slide edges instead of drifting
// into the letter-/pillarboxed margins when the window's aspect ratio
// doesn't exactly match the configured one.
$idsBarWidthRatio: 0.05;
$idsLogoWidthRatio: 0.25;
$idsBarWidth: calc(var(--slide-height) * #{$idsBarWidthRatio});
$idsHeadingGap: 24px;

// Vertical gap between the title and the subtitle. The subtitle's bar segment
// reaches up by this much to bridge it, so the two segments read as one bar.
$idsHeadingSpacing: 8px;

// Rendered height of one subtitle line. Slides without a subtitle reserve
// exactly this much, so the bar and the start of the body content stay put
// from slide to slide instead of jumping. Must stay in sync with
// $heading3Size (0.9em) and $headingLineHeight (1.2, from template/settings).
$idsSubtitleHeight: 0.9 * $mainFontSize * 1.2;

// The two bar segments abut at a fractional pixel, which browsers round into a
// visible hairline. Overlapping them slightly makes the join seamless.
$idsBarOverlap: 2px;

// reveal.js centres the scaled slide in the viewport, so whenever the window's
// aspect ratio does not match the deck's, an empty band is left beside (or
// above) the slide and the bar would not reach the window's physical edge.
// Working out how wide that band is needs viewport / scale, and CSS cannot
// divide a length by a length -- which is why the hand-written IDS decks solve
// this in JavaScript. revealjs_presentation()'s template therefore publishes
// the band widths, in slide coordinates, as --ids-band-left / --ids-band-top,
// and the bar simply shifts out by that much. Falling back to 0px keeps this
// correct whenever the aspect ratios do match, and if the script never runs.
$idsBandLeft: var(--ids-band-left, 0px);

// revealjs_presentation() sets reveal.js' own `margin` option to 0, so that the
// slide box is the whole viewport and the orange bar can sit flush in its top
// left corner. That would otherwise leave the body content running edge to
// edge, so the breathing room reveal.js' margin used to provide is added back
// here as slide padding; the bar and the headings reach back out to the edge
// with matching negative margins below. The inset is the bar plus its gap, so
// body content lines up with the heading text rather than with the bar.
$idsContentInset: calc(#{$idsBarWidth} + #{$idsHeadingGap});

.reveal .slides section:not(.stack) {
  box-sizing: border-box !important;
  padding-left: #{$idsContentInset} !important;
  padding-right: #{$idsContentInset} !important;
}

// Body content is left aligned with the headings; the title frame keeps its
// own centered layout.
.reveal .slides section:not(.stack):not(.title-frame) {
  text-align: left !important;
}

// reveal.js centers lists by making them inline-block; make them ordinary
// blocks so they line up with the headings.
//
// The markers are NOT native ::marker glyphs: browsers anchor outside-position
// markers at slightly different offsets per engine (and per scale), and even
// ::before font glyphs carry font-specific side bearings, so a padding(text)-
// based alignment of the bullet column with the heading text can never be
// pixel-exact everywhere. Instead we DRAW the markers as CSS boxes in
// absolutely positioned li::before rules. Geometry (all values in the item's
// own font size, so the hierarchy scales with the 0.8em per-level sizing from
// the NESTED LISTS section below):
//
//   - item text starts at (list left edge) + 0.65em
//   - the marker box starts exactly at the list's left edge; on content
//     slides that edge coincides with the heading text's left edge, i.e. the
//     bullet column is flush with the slide title, deterministically in every
//     browser and at every window size
//
// For nested lists the ::before offset has to be divided by the 0.8 font-size
// factor, because the list's padding is computed in the PARENT item's font
// size while the ::before offset is computed in the (smaller) child size.
$idsListIndent: 0.65em;
$idsListShrink: 0.8;
$idsMarkerSize: 0.22em;
$idsMarkerTop: calc((1.3em - #{$idsMarkerSize}) / 2);

.reveal .slides section:not(.title-frame) ul,
.reveal .slides section:not(.title-frame) ol {
  display: block !important;
  text-align: left !important;
  margin-left: 0 !important;
  padding-left: $idsListIndent !important;
  list-style: none !important;
}

.reveal .slides section:not(.title-frame) li {
  position: relative !important;
}

.reveal .slides section:not(.title-frame) li::before {
  position: absolute !important;
  left: calc(-1 * #{$idsListIndent}) !important;
  color: var(--r-list-bullet-color) !important;
}

.reveal .slides section:not(.title-frame) li li::before {
  left: calc(-1 * #{$idsListIndent} / #{$idsListShrink}) !important;
}

// Unordered-list markers: drawn boxes (round dot, square, ring for deeper
// levels), vertically centered on the item's first line.
.reveal .slides section:not(.title-frame) ul > li::before {
  content: "" !important;
  top: $idsMarkerTop !important;
  width: $idsMarkerSize !important;
  height: $idsMarkerSize !important;
  box-sizing: border-box !important;
  border-radius: 50% !important;
  background: var(--r-list-bullet-color) !important;
}

.reveal .slides section:not(.title-frame) ul ul > li::before {
  border-radius: 0 !important;              // square
}

.reveal .slides section:not(.title-frame) ul ul ul > li::before {
  background: transparent !important;       // ring
  border: 0.055em solid var(--r-list-bullet-color) !important;
  border-radius: 50% !important;
}

// Ordered lists: the CSS list-item counter honours the HTML start/value
// attributes, so pandoc's `start`/`value` lists keep their numbers. Numbers
// are right-aligned into the indent, ending just before the item text.
.reveal .slides section:not(.title-frame) ol > li::before {
  content: counter(list-item, decimal) "." !important;
  width: calc(#{$idsListIndent} - 0.12em) !important;
  text-align: right !important;
}

// Checkbox (pandoc task) lists keep their checkboxes, no markers on top.
.reveal .slides section:not(.title-frame) ul.task-list li::before {
  content: none !important;
}

// reveal.js centres code blocks (width: 90%; margin: auto); make them fill the
// slide's text column so they start on the same left edge as the headings.
.reveal .slides section:not(.title-frame) pre {
  width: auto !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
}

// The IDS logo stays a slide-wide watermark (top right of every slide,
// including the title page). The top offset is chosen so the logo's cap line
// meets the top of the heading text rather than sitting below it; the SVG
// carries a little transparent padding of its own, which this accounts for.
$idsLogoTop: 10px;
$idsLogoRight: 8px;

.reveal .slides {
  background-image: url('https://corpora.ids-mannheim.de/slides/reveal.js.ids/images/IDS-Logo-2019.svg');
  background-repeat: no-repeat;
  background-position: top #{$idsLogoTop} right #{$idsLogoRight};
  background-size: calc(var(--slide-height) * #{$idsLogoWidthRatio}) auto;
}

// The orange bar is drawn as a ::before on the headings rather than on the
// slide, in two segments: one behind the title and one behind the subtitle.
// Because each segment is sized as a percentage of its own heading's box, the
// bar always ends exactly at the bottom of the last heading -- it follows a
// subtitle when there is one, stops at the title when there isn't, and grows
// by itself when a heading wraps onto a second line. No fixed heights, and no
// JavaScript. Headings carry no vertical padding, so they sit as high on the
// slide as the bar does. Every rule is !important because this theme has to
// win against plugin- and document-level CSS loaded after it.
.reveal .slides section:not(.title-frame) > h1:first-child,
.reveal .slides section:not(.title-frame) > h2:first-child {
  position: relative !important;
  display: block !important;
  text-align: left !important;
  margin: 0 calc(-1 * #{$idsContentInset}) #{$idsHeadingSpacing} calc(-1 * #{$idsContentInset}) !important;
  padding: 0 0 0 #{$idsContentInset} !important;
  font-weight: var(--r-heading-font-weight) !important;
}

.reveal .slides section:not(.title-frame) > h1:first-child::before,
.reveal .slides section:not(.title-frame) > h2:first-child::before,
.reveal .slides section:not(.title-frame) > h2:first-child + h3::before {
  content: "" !important;
  position: absolute !important;
  width: #{$idsBarWidth} !important;
  // A flat fill rather than orange_bar.png: that image is two-toned (a lighter
  // band across its top), so stretching it over each segment separately left a
  // pale seam where the two met. The IDS reference decks draw a flat #f6a800.
  background: #{$idsOrange} !important;
}

// Title segment: pulled out to the window's physical left edge.
.reveal .slides section:not(.title-frame) > h1:first-child::before,
.reveal .slides section:not(.title-frame) > h2:first-child::before {
  top: 0 !important;
  left: calc(-1 * #{$idsBandLeft}) !important;
  height: 100% !important;
}

// A slide without a subtitle reserves the room one would have taken, so the
// bar keeps the same height and the body content starts at the same place on
// every slide. :has() is what lets us ask "is a subtitle coming?" in CSS; where
// it is unsupported such slides simply keep a title-height bar.
.reveal .slides section:not(.title-frame) > h1:first-child:not(:has(+ h3)),
.reveal .slides section:not(.title-frame) > h2:first-child:not(:has(+ h3)) {
  margin-bottom: calc(#{$idsHeadingSpacing} + #{$idsSubtitleHeight} + #{$blockMargin}) !important;
}

.reveal .slides section:not(.title-frame) > h1:first-child:not(:has(+ h3))::before,
.reveal .slides section:not(.title-frame) > h2:first-child:not(:has(+ h3))::before {
  height: calc(100% + #{$idsHeadingSpacing} + #{$idsSubtitleHeight}) !important;
}

// The subtitle sits in the slide's normal text column, so its segment has to
// reach back out to the slide edge, and up over the gap to the title.
.reveal .slides section:not(.title-frame) > h2:first-child + h3 {
  position: relative !important;
  text-align: left !important;
  margin-top: 0 !important;
  margin-left: 0 !important;
  margin-bottom: $blockMargin !important;
}

.reveal .slides section:not(.title-frame) > h2:first-child + h3::before {
  top: calc(-1 * (#{$idsHeadingSpacing} + #{$idsBarOverlap})) !important;
  left: calc(-1 * (#{$idsContentInset} + #{$idsBandLeft})) !important;
  height: calc(100% + #{$idsHeadingSpacing} + #{$idsBarOverlap}) !important;
}

// Section-divider slides: a level 1 heading alone on a slide (pandoc marks
// these .level1). The IDS reference decks centre that title on the slide while
// the bar stays in its usual top left corner, so here the bar cannot hang off
// the heading -- it is painted on the slide itself, at the height it has on
// every other slide, and the heading gets none of the top-left treatment.
$idsTitleHeight: 1.35 * $mainFontSize * 1.2;
$idsBarBlockHeight: $idsTitleHeight + $idsHeadingSpacing + $idsSubtitleHeight;

.reveal .slides section.level1:not(.title-frame) {
  height: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
}

.reveal .slides section.level1:not(.title-frame)::before {
  content: "" !important;
  position: absolute !important;
  top: 0 !important;
  left: calc(-1 * #{$idsBandLeft}) !important;
  width: #{$idsBarWidth} !important;
  height: #{$idsBarBlockHeight} !important;
  background: #{$idsOrange} !important;
}

.reveal .slides section.level1:not(.title-frame) > h1:first-child {
  text-align: center !important;
  margin: 0 !important;
  padding: 0 !important;
}

.reveal .slides section.level1:not(.title-frame) > h1:first-child::before {
  content: none !important;
}

// Define additional color effects based on Dracula spec
// https://spec.draculatheme.com/
:root {
  --r-bold-color: #{$idsOrange};
  --r-list-bullet-color: #{$listBulletColor};
}

.reveal {
  strong, b {
          color: var(--r-bold-color);
  }

  // Dracula colored list bullets and numbers
  ul, ol {
          li::marker {
                  color: var(--r-list-bullet-color) !important;
          }
  }
}

// Nested list items are set progressively smaller, both to emphasise the
// hierarchy and to keep deeply nested lists from visually competing with the
// first level. The em size compounds down the nesting levels, so each deeper
// level is 80% of its parent (level 2: 80%, level 3: 64%, level 4: 51%).
// Markers and the hanging indentation (padding-left: 0.7em above) scale with
// the text automatically.
.reveal li li {
  font-size: 0.8em;
}


/*********************************************
 * FOOTER
 *********************************************/
 #ids-footer:not(title-slide) {
  opacity: 1;
  background: white;
  color: #444444;
  border-top: dotted orange 2px;
  transition: opacity 800ms ease-in-out;
  position: fixed;
  height: 6%;
  line-height: 6%;
  z-index: -20;
  width: 100%;
  letter-spacing: 0em;
  text-align: center;
  display: table;
}

#ids-footer span {
  height: 100%;
  line-height: 100%;
  z-index: -20;
  font-size: 1.8vh;
  font-family: "Fira Sans Condensed", "Fira Sans", "Roboto Condensed", "League Gothic", Impact, sans-serif;
  display: inline-block;
  display: table-cell;
  vertical-align: middle;
}

/* Bottom position for the IDS-Footer footer when both progress bar and TOC-Progress are visible */
div.progress[style="display: block;"] ~ #ids-footer {
  bottom: calc(3px + 0vh);
}

/* Bottom position for the IDS-Footer footer when TOC-Progress is visible */
#ids-footer {
  bottom: 3px;
}

#ids-footer a {
  color: #555555;
}

/* Bottom position for the IDS-Footer footer when progress bar is visible */
div.progress[style="display: block;"] ~ footer:last-of-type#ids-footer {
  bottom: 3px;
}

/* Bottom position for the IDS-Footer footer when neither progress bar nor TOC-Progress are visible */
footer:last-of-type#ids-footer {
  bottom: 0px;
}

/* Make IDS-Footer invisible if explicitly indicated */
.no-ids-footer #ids-footer {
  opacity: 0;
  transition: opacity 800ms ease-in-out;
}

.title-frame #ids-footer {
  opacity: 0;
  transition: opacity 800ms ease-in-out;
}

.no-toc-progress #ids-footer {
  opacity: 0;
  transition: opacity 800ms ease-in-out;
}

/* Make IDS-Footer invisible in overview mode */
.overview #ids-footer {
  opacity: 0;
  transition: opacity 800ms ease-in-out;
}

// Like the orange bar/IDS logo above, this is painted on the slide itself
// (rather than on .slide-background-content, which spans the raw,
// unscaled viewport) so it stays pinned to the title slide's true
// bottom-right corner instead of the browser window's.
.reveal .slides section.title-frame {
  background-image: url("https://corpora.ids-mannheim.de/slides/reveal.js.ids/images/Mitglied_WGL_transparent.svg");
  background-repeat: no-repeat;
  background-position: right 15px bottom 5px;
  background-size: calc(var(--slide-height) * 0.07) auto;
}

@media only screen {
  .reveal .slides section.title-frame {
    background-position: right 45px bottom 5px;
  }
}


.slide-menu-items, .slide-menu-toolbar {
  font-family: "Fira Sans" !important;
}

/*
 * Menu controls
 */
body .reveal .slide-menu-button {
  color: #aaaaaa !important;
  position: fixed;
  left: 30px;
  bottom: 2%;
  vertical-align: middle;
  z-index: 30;
  font-size: 2vh;
}

#customcontrols > ul {
  color: #aaaaaa !important;
  position: fixed;
  left: 50px;
  bottom: 2% !important;
  vertical-align: middle;
  z-index: 30;
  font-size: 2vh;
}

@media only screen and (min-width: 500px) {
  #customcontrols > ul {
    bottom: 2% !important;
  }
}

.reveal .controls .controls-arrow {
  position: relative;
  width: 3.6em;
  height: 3.6em;
  bottom: -12px;
  right: -4px;
}

.reveal h3, h4, h5, h6 {
  text-transform: none !important;
}

.reveal h3, h4, h5, h6 {
  text-transform: none !important;
}

.reveal h2 + h3 {
  margin-top: -0.5em !important;
}

.title-frame h1,
.title-frame h2 {
    margin: 0 0 0 0;
    background: rgb(246, 168, 0);
    color: white;
    font-family: "Fira Sans Condensed", "Roboto Condensed", Impact, sans-serif;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 0.05ex;
    text-transform: uppercase;
    width: 100%;
    margin-top: .5em;
    padding-top: .5em;
    font-size: 1.75em;
    margin-left: 0;
    text-align: center;
    text-shadow: none;
    word-wrap: break-word;
}


.title-frame .author {
  font-family: "Fira Sans Condensed", sans-serif;
  font-weight: 400;
  color: #657b83;
  margin-top: 10vh;
}

.title-frame .place {
  font-family: "Fira Sans Condensed", sans-serif;
  margin-top: 40px;
  font-weight: 400;
  color: #657b83;
}

.title-frame h2 {
  margin-top: -3px;
  margin-bottom: 1em;
  padding-bottom: .5em;
  font-size: 1em;
}

/*********************************************
 * TABLES
 *********************************************/

 th {
  color: rgb(246, 168, 0);
}

table {
  font-family: 'Fira Sans Condensed', sans-serif;
  font-weight: 400;
  font-size: 16px;
}

.reveal table.dataTable {
  border: #aaaaaa 1px solid;
  border-collapse: collapse;
}

.reveal table.dataTable td {
  border: #aaaaaa 1px solid;
  border-collapse: collapse;
}

.dataTables_wrapper .dataTables_length, .dataTables_wrapper .dataTables_filter, .dataTables_wrapper .dataTables_info, .dataTables_wrapper .dataTables_processing, .dataTables_wrapper .dataTables_paginate, table.dataTable thead > tr > th.sorting::before, table.dataTable thead > tr > th.sorting::after, table.dataTable thead > tr > th.sorting_asc::before, table.dataTable thead > tr > th.sorting_asc::after, table.dataTable thead > tr > th.sorting_desc::before, table.dataTable thead > tr > th.sorting_desc::after, table.dataTable thead > tr > th.sorting_asc_disabled::before, table.dataTable thead > tr > th.sorting_asc_disabled::after, table.dataTable thead > tr > th.sorting_desc_disabled::before, table.dataTable thead > tr > th.sorting_desc_disabled::after, table.dataTable thead > tr > td.sorting::before, table.dataTable thead > tr > td.sorting::after, table.dataTable thead > tr > td.sorting_asc::before, table.dataTable thead > tr > td.sorting_asc::after, table.dataTable thead > tr > td.sorting_desc::before, table.dataTable thead > tr > td.sorting_desc::after, table.dataTable thead > tr > td.sorting_asc_disabled::before, table.dataTable thead > tr > td.sorting_asc_disabled::after, table.dataTable thead > tr > td.sorting_desc_disabled::before, table.dataTable thead > tr > td.sorting_desc_disabled::after {
  display: none;
}

.caption {
  font-family: 'Fira Sans Condensed', sans-serif;
  font-weight: 400;
  font-size: 16px;
	text-align: center;
}

/*
table.display td { white-space: nowrap; }
*/

.dt-buttons, .dataTables_filter {
  margin-top: 10pt;
}

/* Sort Arrows in DataTables */
table.dataTable thead>tr>th.sorting:before, table.dataTable thead>tr>th.sorting:after, table.dataTable thead>tr>th.sorting_asc:before, table.dataTable thead>tr>th.sorting_asc:after, table.dataTable thead>tr>th.sorting_desc:before, table.dataTable thead>tr>th.sorting_desc:after, table.dataTable thead>tr>th.sorting_asc_disabled:before, table.dataTable thead>tr>th.sorting_asc_disabled:after, table.dataTable thead>tr>th.sorting_desc_disabled:before, table.dataTable thead>tr>th.sorting_desc_disabled:after, table.dataTable thead>tr>td.sorting:before, table.dataTable thead>tr>td.sorting:after, table.dataTable thead>tr>td.sorting_asc:before, table.dataTable thead>tr>td.sorting_asc:after, table.dataTable thead>tr>td.sorting_desc:before, table.dataTable thead>tr>td.sorting_desc:after, table.dataTable thead>tr>td.sorting_asc_disabled:before, table.dataTable thead>tr>td.sorting_asc_disabled:after, table.dataTable thead>tr>td.sorting_desc_disabled:before, table.dataTable thead>tr>td.sorting_desc_disabled:after {
  right: 0 !important;
  line-height: 80% !important;
}

/*********************************************
 * BIBLIOGRAPHY
 *********************************************/

.reveal .references {
  font-family: "Fira Sans Condensed", sans-serif;
  font-size: 16px;
  text-align: left;
  margin-top: 35px;
  max-height: 540px;
  font-weight: 400;
  color: #253b43;
  overflow-y: auto;
}

.hanging-indent > .csl-entry {
  padding-left: 22px ;
  text-indent: -22px ;
}

.csl-entry::first-line {
  color: #253b43;
}

.csl-entry {
  color: #888888;
}

/* Add line break after authors and year*/
.csl-entry :first-child::before {
  content: "\a";
  white-space: pre;
}

.reveal code.sourceCode:last-child + pre {
  height: 800px !important;
}


/*********************************************
 * ARROWS and SLIDE NUMBERS
 *********************************************/

 .reveal .controls .controls-arrow:after, .reveal .controls .controls-arrow:before {
  width: 13px !important; /* size */
  height: 4px; /* line width */
}

.reveal .controls {
  display: none;
  position: absolute;
  top: auto;
  bottom: -8px;
  right: 16px;
  left: auto;
  z-index: 11;
  /* color: #000;*/
  pointer-events: none;
  font-size: 8px;
}

.reveal .controls .controls-arrow {
  position: relative;
  height: 3.6em;
  width: 1.2em; /* distance betwee arrows */
  bottom: 0;
  right: 0;
}

.reveal div.slide-number {
  text-align: center;
  width: 2em;
  position: absolute;
  display: block;
  right: 29px;
  bottom: 22px;
  z-index: 31;
  font-family: "Fira Sans Condensed", sans-serif;
  font-size: 18px;
  line-height: 1;
  background-color: white;
  color: #666;
  padding: 0;
}