:root {
    /* Configurable variables: https://github.com/hakimel/reveal.js/blob/master/css/theme/template/exposer.scss */
    /* --r-main-font: Helvetica; */
    --primary-color: rgb(106, 0, 182);
    --selection-color: rgb(106, 0, 182);
    --r-main-font-size: 26px;
    --r-link-color: var(--primary-color);
    --r-link-color-hover: rgb(129, 0, 221);
    --r-block-margin: 1.3em 0;
    --r-heading-margin: .5em 0 1em;
}

.reveal {
    font-weight: 300;
    color: #444;
}

.reveal .slides {
    text-align:left;
}

.reveal .slides section,
.reveal .slides section > section,
.reveal p {
  line-height: 1.4;
}

#title-slide {
    display: flex !important;
    flex-direction: column;
    justify-content: center;
    height: 100%;
}

h1.title {
    margin-top: 0;
}

/* QR code to the slides and paper, in the free space right of the title. */
#title-slide::after {
    content: "";
    background-image: url('qr-code.svg');
    background-size: contain;
    background-repeat: no-repeat;
    position: absolute;
    display: block;
    top: 13.5em;
    right: 0rem;
    width: 8em;
    height: 8em;
}

.reveal pre {
    box-shadow: none;
    line-height: 1.5;
    font-size: 1em;
    width: auto;
}

.reveal code {
    background-color: #f4f4f4;
    font-size: 0.8em;
}

.reveal pre code {
    max-height: none;
    display: block;
    width: auto;
}

.reveal pre.small {
    font-size: 0.9em;
}

:not(pre) code {
    display: inline-block;
    padding: 0.1em 0.3em;
    border-radius: 6px;
}

.reveal small,
.reveal small * {
    vertical-align: inherit;
}

.reveal ul ul {
    margin: 0;
}

.reveal li {
    margin-bottom: 0.25em;
}

pre code.hljs {
    border-radius: 6px;
    padding: 0;
}

code {
    background-color: #fafafa;
}

:not(pre) code {
    background-color: #fafafa;
    display: inline-block;
    padding: 0.1em 0.3em;
    border-radius: 6px;
}

.katex {
    font-size: 1em;
}

.reveal h1 {
    margin-bottom: 0.5em;
    line-height: 1.1;
}

.reveal h1::after {
    content: "";
    display: block;
    width: 3em;
    height: 0.3em;
    background-color: var(--primary-color);
}

.reveal h2 {
    font-size: 1.4em;
}

.reveal h2::after {
    content: "";
    display: block;
    width: 2em;
    height: 0.2em;
    background-color: var(--primary-color);
}

.reveal h3 {
    margin-bottom: 1em;
}

.reveal h3::after {
    content: "";
    display: block;
    width: 1.5em;
    height: 0.15em;
    background-color: var(--primary-color);
}

.reveal ul, .reveal ol {
    display: block;
    margin: var(--r-block-margin);
    padding-left: 1em;
}

.reveal .slides section .fragment {
    opacity: 0.1;
    visibility: visible;
}

.reveal .slides section .fragment.visible {
    opacity: 1;
}

.reveal ::selection {
    background-color: var(--selection-color);
}

#TOC ul {
    columns: 2;
}

.reveal .references {
    margin: 0;
}

.reveal .slide-number {
    font-size: 3vh;
    padding: 0.5vh 1vh;
    right: 1.5vh;
    bottom: 1.5vh;
}

.katex-display {
    margin: 0;
}

/* Display math that is narrower than its column, such as the value grammar,
   sits flush left instead of centered. Apply with `<div class="math-left">`. */
.math-left .katex-display > .katex {
    text-align: left;
}

.hljs {
    background-color: transparent !important;
}

.column {
    scrollbar-width: none;
}

.column > *:first-child,
.column > div:first-child > *:first-child {
    margin-top: 0;
}

.paper {
    box-shadow: 0 0 16px rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

.reveal .progress {
    height: 4px;
    bottom: 4px;
}

.hljs-comment {
    color: #888888;
}

.hljs-keyword, .hljs-built_in  {
    color: var(--primary-color);
}

/* highlight.js tags Haskell's `let` as a title, which the theme paints like a
   function name. Show it as a keyword instead. */
.language-haskell .hljs-title {
    color: var(--primary-color);
}

.hljs-function .hljs-title {
    color: #3462c5;
}

.hljs-type, .hljs-class .hljs-title {
    color: #bd8100;
}

.fragment {
    outline-offset: 0;
}

.fragment.visible {
    /*outline: 1px solid #982f962f;*/
    outline-offset: 8px;
    border-radius: 6px;
}

.fragment.visible.current-fragment {
    outline: 1px solid rgb(106, 0, 182);
}

.column, .columns {
    overflow: visible !important;
}

div.column {
    flex: 1 0 0;
}

/* Dense slides: scale the whole slide down a notch, for code- and math-heavy
   content that cannot be trimmed further. Apply with `## Title {.dense}`. */
.reveal section.dense {
    font-size: 0.85em;
}