@import url('https://fonts.googleapis.com/css2?family=Baloo+Chettan+2&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Ubuntu+Mono&display=swap');

:root {
  --dark-grey: #444;
	--light-grey: #bbb;
	--dark-pink: #909;
	--light-cyan: #399;
	--dark-cyan: #066;
	--dark-green: #044;
}

html {
	overflow: hidden;
}
body {
	background-color: var(--dark-grey);
	margin: 0;
	font-family: "Baloo Chettan 2", sans-serif;
	overflow: hidden;
	color: var(--light-grey);
	width: 100%;
	display: flex;
	flex-direction: column;
}
h1, h2, h3, h4 {
	line-height: 1em;
	margin: 0.75em 0;
}
h1, h2, h3, h4, figure, .center {
	text-align: center;
}
h2:first-child {
	margin: 0 0 0.5em 0;
}
section h1 { font-size: 3em; }
section h2 { font-size: 2em; }
section h3 { font-size: 1.7em; }
section h4 { font-size: 1.4em; }
iframe {
	position: relative;
	border: 2px solid var(--dark-pink);
	width: 100%;
}
img {
	max-width: 100%;
	max-height: 50vh;
}
figcaption {
	font-size: 90%;
	margin-top: 0.25em;
	color: var(--dark-grey);
}
pre {
	margin: 0;
	tab-size: 0.5em;
}
figure {
	margin: 1em auto;
}
pre + figure {
	margin: 0 auto 1em auto;
}
figure img {
	max-height: 40vh;
}
pre + h1 {
	margin-top: 0.5em;
}
em, strong {
	color: var(--dark-pink);
}
button {
	padding: 0 0.25em;
  font-size: 0.7em;
}
body > nav {
	display: flex;
	justify-content: space-between;
	align-items: center;
	height: 2em;
	padding: 0 1em;
	box-sizing: border-box;
}
body > nav a {
	color: inherit;
	padding: 0.25em 0;
	text-decoration: none;
}
body > nav a:hover {
	color: #fff;
}
body > nav button {
	border: none;
	border-radius: 0.5em;
	color: inherit;
	background-color: transparent;
	font-size: 120%;
}
blockquote {
  margin: 0 3em;
  font-size: 65%;
  border-style: solid;
  border-width: 2px 0;
  border-color: #bbb;
}
ul, ol {
	padding-left: 1em;
  margin: 0.5em 0;
  text-align: left;
}
footer {
	height: 2em;
	padding: 0.25em 1em;
	box-sizing: border-box;
	user-select: none;
	display: flex;
	justify-content: center;
	align-items: center;
}
footer small {
	display: none;
}
code {
	font-family: "Ubuntu Mono", "courier", monospace;
	border-radius: 0.25em;
	color: var(--light-cyan);
}
code.hljs {
	position: relative;
	background-repeat: no-repeat;
	background-position: top 0 right 0.25em;
	background-size: 1.5em;
}
code.hljs.xml, code.hljs.html {
	background-image: url('../images/html.svg');
}
code.hljs.css {
	background-image: url('../images/css.svg');
}
code.hljs.js {
	background-image: url('../images/js.svg');
}
img.short {
	max-height: 10vh;
}
img.tall {
  min-height: 50vh;
}
input {
  font-size: 0.7em;
}
.intro > img {
	max-width: 20%;
	max-height: 20vh;
}
.intro > figure {
  margin: 1em 0;
  width: 20%;
}
.flex {
	display: flex;
}
.flex-col {
	display: flex;
  flex-direction: column;
}
.flex-center {
	display: flex;
	justify-content: center;
	align-items: center;
}
.flex-around {
	display: flex;
	justify-content: space-around;
	align-items: center;
	flex-wrap: wrap;
}
.d-column {
  flex-direction: column;
}
.j-end {
  justify-content: flex-end;
}
.j-between {
  justify-content: space-between;
}
.j-around {
  justify-content: space-around;
}
.j-center {
  justify-content: center;
}
.a-start {
  align-items: flex-start;
}
.a-end {
  align-items: flex-end;
}
.a-center {
  align-items: center;
}
.wrap {
  flex-wrap: wrap;
}
.expendable {
  display: none;
}
.shy {
  margin: 1em;
}
.reference {
	position: absolute;
	bottom: 0em;
	right: 0.25em;
	font-size: 0.8em;
}
.hero {
  display: block;
	margin: 1em;
	padding: 2em;
	box-sizing: border-box;
	background-color: var(--dark-green);
	color: #fff;
	border-radius: 0.5em;
}
.hero strong, .hero em {
  color: yellow;
}
#slideDeck section .hero a {
  color: white;
}
.modal {
  position: absolute;
	transition: opacity 0.4s;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0,0,0,0.9);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  padding: 1em;
  text-align: center;
  opacity: 0;
  z-index: -1;
}
.modal.active {
	opacity: 1;
  z-index: 1;
}
.modal p { max-width: 400px; }
.modal #dismiss { padding: 0.5em 1.5em; }


body.clean > nav, body.clean footer {
	opacity: 0;
  transition: opacity 0.4s;
}
body.clean > nav:hover, body.clean footer:hover {
	opacity: 1;
}
iframe {
	height: calc(100vh - 14em);
}
#bar {
  height: 0.25em;
  position: relative;
}
#progress {
  height: 0.5em;
  left: -100%;
  width: 100%;
  background-color: #777;
  position: absolute;
  transition: transform 1s;
}
#slideDeck {
	position: relative;
	height: calc(100vh - 4.25em);
	box-sizing: border-box;
	overflow-y: auto;
	overflow-x: hidden;
}
#slideDeck:focus {
	outline: none;
}
#slideDeck section {
	position: absolute;
	top: 0;
	overflow: hidden;
	background-color: #fff;
	padding: 1em;
	box-sizing: border-box;
	color: var(--dark-grey);
	width: 100%;
	min-height: 100%;
	margin: 0;
	opacity: 0;
	transition: opacity 1s;
	animation: toLeft 1s forwards;
}
#slideDeck section.current {
	opacity: 1;
	animation: fromRight 1s forwards;
}
#slideDeck.backwards section {
	animation: toRight 1s forwards;
}
#slideDeck.backwards section.current {
	animation: fromLeft 1s forwards;
}
#slideDeck section a {
	color: var(--dark-cyan);
	white-space: nowrap;
}

#slideDeck.map {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: center;
	scroll-behavior: smooth;
}
#slideDeck.map section {
	font-size: 60%;
	padding: 0.5em;
	transform: scale(0.9);
	width: 300px;
	margin: 0.25em;
	min-height: auto;
	height: 300px;
	opacity: 1;
	position: relative;
	overflow: auto;
	animation: none;
	border: 3px solid white;
}
#slideDeck.map section.current {
	animation: none;
	border: 3px solid red;
}
#slideDeck.map section figure {
	max-width: 65%;
}

#toolbar {
	display: flex;
	justify-content: center;
}
#current {
	font-size: 1.2em;
	margin: 0 0.25em;
}

@media (min-width: 420px) {
	footer small {
		display: inline;
	}
	footer {
		justify-content: space-between;
	}
}

@media (min-width: 500px) {
  .expendable {
    display: block;
  }
	#slideDeck section {
		font-size: 110%;
		padding: 1em 2em;
		border-radius: 0.5em;
		width: 98%;
		margin: 0 1%;
    max-height: 100%;
    /* overflow-y: auto; */
	}

	.reference {
		right: 0.5em;
	}

}
@media (min-width: 600px) {
  #slideDeck section a:hover {
  	text-decoration: underline;
    color: var(--light-cyan);
  }

	#slideDeck {
		height: calc(100vh - 6.25em);
		margin: 1em 0;
	}
	#slideDeck section {
		font-size: 120%;
		border-radius: 1em;
		width: 94%;
		margin: 0 3%;
	}
	.reference {
		right: 1em;
	}
}
@media (min-width: 800px) {
	#slideDeck section {
		font-size: 140%;
		width: 90%;
		margin: 0 5%;
	}
}

@media (min-width: 1100px) {
  .narrow {
    max-width: 55%;
  }
}

@media (min-width: 1200px) {
	#slideDeck section {
		font-size: 150%;
    padding: 1em 4em;
	}
	h1, h2 {
		margin: 0.5em 0;
	}

	#slideDeck section .large ~ * {	font-size: 120%; }
	#slideDeck section .larger ~ * {	font-size: 140%; }
  #slideDeck section .space {	height: 3em; }
  #slideDeck section .smallest ~ * {	font-size: 60%; }
  #slideDeck section .smaller ~ * {	font-size: 80%; }
	#slideDeck section .small ~ * {	font-size: 90%; }
  #slideDeck section .flex-list ~ ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    font-size: 1.6em;
  }
  #slideDeck section .flex-list ~ ul li {
    padding: 0.25em 0.5em;
    margin: 0.125em;
    border-radius: 0.25em;
    background-color: #252;
  }
  #slideDeck section .flex-list ~ ul li a { color: white; }
  #slideDeck section .flex-list ~ ul li a:visited { color: #bfb; }
}

@media (min-width: 1200px) and (min-height: 900px) {
  #slideDeck section {
		font-size: 180%;
	}
}

@keyframes fromRight {
	from { transform: translateX(100vw); }
	to { transform: translateX(0); }
}
@keyframes toLeft {
	from { transform: translateX(0); }
	to { transform: translateX(-100vw); }
}
@keyframes fromLeft {
	from { transform: translateX(-100vw); }
	to { transform: translateX(0); }
}
@keyframes toRight {
	from { transform: translateX(0); }
	to { transform: translateX(100vw); }
}