html {
	box-sizing: border-box;
  font-size: calc(112.5% + 0.5vw);
}

*, *:before, *:after {
  box-sizing: inherit;
}

* {
	margin: 0;
	padding: 0;
}

body, html {
	width: 100%;
	height: 100%;
  overflow: hidden;
}

body {
	color: #000;
  background: #FCFBF0;
	line-height: 1;
}


body {
  font-family: "Avenir", -apple-system, BlinkMacSystemFont, 
    "Segoe UI", "Roboto", "Oxygen", 
    "Ubuntu", "Cantarell", "Fira Sans", 
    "Droid Sans", "Helvetica Neue", sans-serif;
}

a {
	text-decoration: none;
	color: #00f;
}

h1 {
	font-size: 10vh; /*3em;*/
}

h2 {
	font-size: 7vh;/*1.75em;*/
  margin-top: 2.1rem; /* 1.5 baselines */
	/*margin: 0.25em 0;*/
}

h3 {
	font-size: 4vh; /*1.25em;*/
  margin-top: 0.7rem; /* 0.5 baselines */
	/*margin: 0.25em 0;*/
}

h1, h2, h3 {
	font-weight: normal;
}

p {
	font-size: 2em;
  margin: 1.05rem; /* 0.75 baselines  */
}

ul {
	list-style-position: inside;
	font-size: 5vh;
	margin: 2vh 0;
}

ul ul {
	padding-left: 3vw;
}

nav {
	position: absolute;
	right: 2vh;
	top: 2vh;
	font-size: 4vh;
	color: #666;
	background: #fff;
	z-index: 20;
}

section {
  visibility: hidden;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	padding: 4vw;
  background: #FCFBF0;
}

section.active {
	visibility: visible;
}

section.intro {
	display: flex;
	flex-flow: column;
	justify-content: center;
	font-size: 1.5em;
}

section.splash {
	font-size: 1.25em;
	display: flex;
	flex-flow: column;
	justify-content: center;
}

section.megabig {
	font-size: 2em;
}

section.warning {
	background: #ff0;
	border: 1vw solid red;
}

/* don't crop image to center - basically makes sure vertical fits */
section.background-image-contain {
  background-attachment: fixed;
	background-repeat: no-repeat;
  background-position: center center;
  -webkit-background-size: contain;
  -moz-background-size: contain;
  -o-background-size: contain;
  background-size: contain;
}

/* crop image as needed to fit into exact center of viewport */
section.background-image {
  /*background: url(images/bg.jpg) no-repeat center center fixed;*/
	background-repeat: no-repeat;
  background-position: 50% 50%;
  background-attachent: fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

section.mozilla {
	color: #fff;
	background-color: #000;
}

.mozilla > img {
	border: none;
	image-rendering: -moz-crisp-edges;
	image-rendering: crisp-edges;
	width: 100%;
	height: auto;
	max-height: 100%;
}

section.absolute-centered {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  -moz-box-pack: center;">
}

section.background-image > * {
	background: rgba(255, 255, 255, 0.7);
	color: #000;
	text-shadow: 1px 1px 0px #fff;
	padding: 0.1rem;
}


section.two-columns {
	display: flex;
	flex-flow: row;
}

section.two-columns > * {
	flex-grow: 1;
	width: 50%;
}

section.two-columns > div {
	display: flex;
}

section.two-columns > div > * {
	width: 100%;
	height: 100%;
}

section.two-rows {
	display: flex;
	flex-flow: column;
}

section.two-rows > * {
	flex-grow: 1;
	height: 50%;
}

section.two-rows > div {
	display: flex;
}

section.two-rows > div > * {
	width: 100%;
	height: 100%;
}

section.fullscreen-demo {
	display: flex;
	background: #000;
  padding: 0;
  margin: 0;
}

section.fullscreen-demo > div {
	width: 100%;
	height: 100%;
}

section.fullscreen-demo > div iframe {
	width: 100%;
	height: 100%;
}

/* Not interested in Prism's stylistic choices with regards to code blocks */
pre[class*="language-"] {
	margin: 0;
	border-radius: 0;
}

iframe {
	border: none;
}

ins {
	color: green;
	text-decoration: none;
}

/*
img {
	max-width: 80%;
	height: auto;
	max-height: 70%;
}
*/

tt {
	font-weight: bold;
}

.fragment {
	opacity: 0.02;
	transition: opacity 0.2s ease-in;
}

.fragment.visible {
	opacity: 1;
}


.me {
  background-color: #00FFFF;
}

/*

printing
fix any absolute positioning?

*/
@media print {
  @page {
    /* UNSUPPORTED https://developer.mozilla.org/en-US/docs/Web/CSS/@page/size */
    size: landscape;
  }
  body {
    height: auto;
    width: auto;
  }
  section {
    visibility: visible;
    position: relative;
    display: block;
    break-before: always;
    page-break-before: always;
    page-break-inside: avoid;
    height: 600px;
    width: auto;
  }
  html, body, main, section, div {
    float: none !important;
    position: relative !important;
    display: inline;
    box-sizing: content-box !important;
  }

}

/*
@media screen and (max-device-width: 480px) {
  h1 {
    font-size: 2em;
  }
  h2 {
    font-size: 1.5em;
  }
  h3 {
    font-size: 1.25em;
  }
}
*/

/* INDIVIDUAL SLIDES */

.flow-physical-icons {
  height: 7vh;
}