/**
 * DARC Theme based on:
 * A simple theme for reveal.js presentations, similar
 * to the default theme. The accent color is darkblue.
 *
 * This theme is Copyright (C) 2012 Owen Versteeg, https://github.com/StereotypicalApps. It is MIT licensed.
 * reveal.js is Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
 */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    src: url("font/Inter.ttf");
}

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
  *********************************************/
:root {
    --r-background-color: #fff;
    --r-main-font: Inter, sans-serif;
    --r-main-font-size: 40px;
    --r-main-color: #000;
    --r-block-margin: 20px;
    --r-heading-margin: 0 0 20px 0;
    --r-heading-font: Inter, Impact, sans-serif;
    --r-heading-color: #000;
    --r-heading-line-height: 1.2;
    --r-heading-letter-spacing: normal;
    --r-heading-text-transform: none;
    --r-heading-text-shadow: none;
    --r-heading-font-weight: bold;
    --r-heading1-text-shadow: none;
    --r-heading1-size: 2.11em;
    --r-heading2-size: 1.55em;
    --r-heading3-size: 1.2em;
    --r-heading4-size: 1em;
    --r-code-font: monospace;
    --r-link-color: #2aa6da;
    --r-link-color-dark: #2aa6da;
    --r-link-color-hover: #2aa6da;
    --r-selection-background-color: rgba(0, 0, 0, 0.99);
    --r-selection-color: #fff;
    --r-overlay-element-bg-color: 0, 0, 0;
    --r-overlay-element-fg-color: 240, 240, 240;
}

.reveal-viewport {
    background: #fff;
    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;
    overflow-wrap: break-word;
    hyphens: auto;
}

.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: normal;
    font-weight: 600;
    color: #2AA6DA;
}

.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: square;
}

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

.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 ul li::marker {
  color: #2aa6da;
}

.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);
    }
}

/*********************************************
  * OWN ADDITIONS TO DARC THEME
  *********************************************/

/* Scalable Logo on bottom left */
body:after {
    background-image: url(images/50ohm_rus.svg);
    background-size: 8.5em 5em;
    position: fixed;
    bottom: 1em;
    left: 2em;
    width: 8.5em;
    height: 5em;
    content: "";
}

/* Handling bubbles around QSO */
.qso_own,
.qso_other {
    background: #ddd;
    display: inline-block;
    position: relative;
    width: 80%;
    padding: 1ex;
    margin-bottom: 1ex;
}

.qso_own {
    margin-left: 40px;
}

.qso_other {
    margin-left: calc(40px + 10%);
}

.qso_own:after {
    content: ' ';
    position: absolute;
    width: 0;
    height: 0;
    left: -20px;
    right: auto;
    top: 0px;
    bottom: auto;
    border: 22px solid;
    border-color: #ddd transparent transparent transparent;
}

.qso_other:after {
    content: ' ';
    position: absolute;
    width: 0;
    height: 0;
    left: auto;
    right: -20px;
    top: 0px;
    bottom: auto;
    border: 20px solid;
    border-color: #ddd transparent transparent transparent;
}

/* table settings */
.table_label {
    font-style: italic;
}

.table_inner {
    padding: 1ex;
    background: #ddd;
    font-size: 0.7em;
}

/* questions will be shown in landscape and need special treatment */
.question {
    background: #2aa6da;
    color: #fff;
}

.question p {
    padding: 5px;
    margin: 5px;
    border-radius: 4px;
    font-weight: 400;
    text-align: left;
    color: #000;
    background: #fff;
}

.question .question-text {
    font-weight: 600;
    margin: 1ex 1em 1.5ex 1em;
}

.question .question-picture {
    max-width: 100%;
    border-radius: 4px;
    padding: 5px;
    margin: 5px;
    margin-bottom: 1em;
    background: #fff;
}

.question .question-picture img {
    max-width: 100%;
    max-height: 30vh;
}

.question .answers {
    margin-top: 1ex;
    display: grid;
    grid-template-columns: repeat(1, 100%);
    grid-gap: 4px;
    align-items: start;
}

.question.layout-2 .answers,
.question.layout-6 .answers,
.question.layout-8 .answers {
    grid-template-columns: repeat(2, calc(50% - 4px/2));
}

.question .answers img {
    max-width: 100%;
    max-height: 25vh;
}

/* photos and pictures */
.photo,
.picture {
    margin-bottom: 6ex;
}

.photo img,
.picture img {
    display: block;
    max-width: min(89%, 800px);
    max-height: 60vh;
    object-fit: fill;
    margin-left: auto;
    margin-right: auto;
}

.photo figcaption,
.picture figcaption {
    font-style: italic;
    font-size: 0.5em;
    text-align: center;
}

/* Overwrite list style */
ul.list {
    list-style: none;
    /* Remove default bullets */
}

ul.list li::before {
    content: "▪";
    color: #2aa6da;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

ol li {
    margin-bottom: 1ex;
}

/* Show morse code */
span.morse {
    font-size: 33%;
    position: relative;
    bottom: 1.7ex;
    display: inline-block;
}

span.morse_char {
    padding-right: 1.6ex;
    letter-spacing: -0.05ex;
}

span.morse_char:last-child {
    padding-right: 0;
}

/* Center Formulars */
span.formula {
    display: block;
    text-align: center;
}

/* Two column mode on slides */
#left {
    margin: 10px 0 15px 20px;
    text-align: left;
    float: left;
    z-index: -10;
    width: 48%;
    font-size: 0.85em;
    line-height: 1.5;
}

#right {
    margin: 10px 0 15px 0;
    float: right;
    text-align: left;
    z-index: -10;
    width: 48%;
    font-size: 0.85em;
    line-height: 1.5;
}