/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
   pre is removed for now
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}

html, body {
	line-height: 1;
	font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
	background: #fdfdfd;
}

.chapter {
  max-width: 1080px;
  margin: 1em auto 0 auto;
}

.line {
  width: 100%;
  height: 2.5em;
  background: #ff7900;
  margin: 3em 0 0 0;
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 5em;
}

.line2 {
  width: 100%;
  height: 2.5em;
  background: #ff7900;
  margin: 3em 0 0 0;
}

ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

html, body {
	line-height: 150%;
}

h1 { font-size: 4em; }
h2 { font-size: 3em; }
h3 { font-size: 2.5em; }
h4 { font-size: 2em; }
h5 { font-size: 1.5em; }

h1, h2, h3 { margin: -2em 0 0.8em 0; padding-top: 3.5em; }
h4 { margin: -3em 0 0.8em 0; padding-top: 4.5em; }
h5, h6 { margin: -4em 0 0.8em 0; padding-top: 5.5em; }

h1, h2, h3, h4, h5, h6 { font-weight: bold; display: inline-block; line-height: 1.15; }

p { margin: 0.5em 0; }

b { font-weight: bold; }

i { font-style: italic; }

hr { margin: 2em 0; }

ul { list-style: square; list-style-position: inside; }

a {
  background:
     linear-gradient(
       to bottom, #ff7900 0%,
       #ff7900 100%
     );
background-position: 0 100%;
background-repeat: repeat-x;
background-size: 10px 2px;
  text-decoration: none;
  transition: background-size .3s;
color: #000;
font-weight: bold;
}

a:hover {
  background-size: 4px 50px;
  color: #000;
}

table a {
  background: none;
}

strong { font-weight: bold; color: #ff7900; }

.orange { color: #ff7900; }
.green { color: ForestGreen; }
.blue { color: MediumBlue; }
.red { color: FireBrick; }
.yellow { color: Gold; }
.pink { color: DeepPink; }

img { max-width: 100%; box-shadow: 3px 3px 10px grey; margin: 1em 0; }

.extra { background-color: DeepSkyBlue; padding: 1em; margin: 1em 0; }

th, td {
  padding: 0 1em 0 0;
}

.topnav {
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 0;
}

.secondnav {
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 2.5em;
}

.thirdnav {
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 5em;
}

.topnav ul, .secondnav ul, .thirdnav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}

.topnav li, .secondnav li, .thirdnav li {
  float: left;
}

.topnav li a, .secondnav li a, .thirdnav li a {
  display: block;
  color: white;
  text-align: center;
  padding: 0.5em;
  text-decoration: none;
}

.topnav li a:hover, .secondnav li a:hover, .thirdnav li a:hover {
  background-color: #ddd;
  color: black;
}

.active {
  background-color: #ff7900;
  color: white;
}

.topnav-right {
  float: right;
}

.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 1em;
  width: 100%;
  border: none;
  font-size: 100%;
  text-align: left;
  outline: none;
  transition: 0.4s;
}

.focused, .accordion:hover {
  background-color: #ccc;
}

.accordion:after {
  content: '\002B';
  color: #777;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.focused:after {
  content: "\2212";
}

.panel {
  padding: 0 18px;
  background-color: #ffead7;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}