/* Custom Reveal.js theme for Deep Learning Course */
/* University of Iceland Branding */

/*********************************************
 * FONT DECLARATIONS
 *********************************************/

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('../fonts/AtkinsonHyperlegible-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('../fonts/AtkinsonHyperlegible-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('../fonts/AtkinsonHyperlegible-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('../fonts/AtkinsonHyperlegible-BoldItalic.ttf') format('truetype');
  font-weight: 700;
  font-style: italic;
}

/*********************************************
 * GLOBAL STYLES
 *********************************************/

:root {
  /* University of Iceland Colors */
  --ui-primary: #10099F;          /* Main UI Blue */
  --ui-teal: #2DD2C0;            /* Supporting color */
  --ui-mint: #00FFBA;            /* Supporting color */
  --ui-yellow: #FAC55B;          /* Supporting color */
  --ui-coral: #FC8484;           /* Supporting color */
  --ui-orange: #FFA05F;          /* Supporting color */
  --ui-light-gray: #EEEEEE;      /* Supporting color */
  --ui-lighter-gray: #F5F5F5;    /* Supporting color */
  --ui-dark: #262626;            /* Supporting color */
  
  /* Reveal.js theme variables */
  --r-background-color: #FFFFFF;
  --r-main-font: 'Atkinson Hyperlegible', 'Source Sans Pro', Helvetica, sans-serif;
  --r-main-font-size: 30px;
  --r-main-color: var(--ui-dark);
  --r-block-margin: 20px;
  --r-heading-margin: 0 0 20px 0;
  --r-heading-font: 'Atkinson Hyperlegible', 'Source Sans Pro', Helvetica, sans-serif;
  --r-heading-color: var(--ui-primary);
  --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: 700;
  --r-heading1-text-shadow: none;
  --r-heading1-size: 2.2em;
  --r-heading2-size: 1.6em;
  --r-heading3-size: 1.2em;
  --r-heading4-size: 1em;
  --r-code-font: 'Source Code Pro', monospace;
  --r-link-color: var(--ui-primary);
  --r-link-color-dark: #0A066A;
  --r-link-color-hover: var(--ui-teal);
  --r-selection-background-color: var(--ui-primary);
  --r-selection-color: #fff;
}

.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);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 95%;
  margin-left: auto;
  margin-right: auto;
}

.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 var(--ui-light-gray);
}

.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 .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(--ui-primary);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}

.reveal a .r-frame {
  transition: all .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(--ui-primary);
}

/*********************************************
 * PROGRESS BAR
 *********************************************/

.reveal .progress {
  background: var(--ui-light-gray);
  color: var(--ui-primary);
}

/*********************************************
 * PRINT BACKGROUND
 *********************************************/

@media print {
  .backgrounds {
    background-color: var(--r-background-color);
  }
}

/*********************************************
 * CUSTOM CLASSES FOR DEEP LEARNING COURSE
 *********************************************/

/* Title slide styling */
.reveal .title-slide {
  position: relative;
}

.reveal .title-slide h1 {
  font-size: 3em;
  margin-bottom: 0.2em;
  color: var(--ui-primary);
}

.reveal .title-slide h2 {
  font-size: 1.5em;
  color: var(--ui-dark);
  margin-top: 0;
}

.reveal .title-slide p {
  font-size: 0.8em;
  color: var(--ui-dark);
}

/* University of Iceland Logo */
.ui-logo {
  position: absolute;
  top: 30px;
  right: 30px;
  width: 180px;
  height: auto;
  opacity: 0.9;
}

/* Mobile adjustments */
@media (max-width: 768px) {
  .ui-logo {
    width: 120px;
    top: 20px;
    right: 20px;
  }
}

/* Code highlighting improvements */
.reveal .hljs {
  background: var(--ui-lighter-gray);
  color: var(--ui-dark);
  padding: 1em;
  border-radius: 4px;
  border: 1px solid var(--ui-light-gray);
}

/* Custom fragment animations */
.reveal .fragment.fade-in-then-semi-out {
  opacity: 0;
  visibility: hidden;
  will-change: opacity;
}

.reveal .fragment.fade-in-then-semi-out.visible {
  opacity: 0.5;
  visibility: inherit;
}

.reveal .fragment.fade-in-then-semi-out.current-fragment {
  opacity: 1;
}

/* Two-column layout */
.reveal .columns {
  display: flex;
  gap: 2em;
  align-items: flex-start;
}

.reveal .column {
  flex: 1;
}

/* Emphasis box */
.reveal .emphasis-box {
  background: rgba(16, 9, 159, 0.05);
  border-left: 4px solid var(--ui-primary);
  padding: 1em;
  margin: 1em 0;
  border-radius: 0 4px 4px 0;
}

/* Learning objectives */
.reveal .learning-objectives {
  background: rgba(45, 210, 192, 0.1);
  border: 2px solid var(--ui-teal);
  border-radius: 8px;
  padding: 1em;
  margin: 1em 0;
}

.reveal .learning-objectives h3 {
  color: var(--ui-teal);
  margin-top: 0;
  font-size: 1.2em;
}

.reveal .learning-objectives ul {
  margin: 0.5em 0;
}

/*********************************************
 * TOOLTIP STYLES
 *********************************************/

.reveal .tooltip {
  position: relative;
  display: inline-block;
  cursor: help;
}

/* Hide original tooltiptext elements - they're now handled by JavaScript */
.reveal .tooltip .tooltiptext {
  display: none;
}

/* Media query for smaller screens */
@media (max-width: 1024px) {
  .reveal h2 {
    font-size: 1.4em;
  }
}