:root {
  background-color: hsl(222, 15%, 10%);
}

ck-app {
  background-color: hsl(222, 15%, 10%);
  color: hsl(222, 15%, 75%);
  line-height: 1.5;
}

header,
section {
  min-width: 800px;
  max-width: 1200px;
  box-sizing: border-box;
  padding: 3em 2em 3em 20em;
}

header {
  padding-top: 4.5em;
}

header p {
  font-size: 24px;
}

h1 {
  color: hsl(0, 0%, 100%);
}

section {
  border-top: 1px dotted hsl(222, 15%, 35%);
}

section:after {
  content: '\0020';
  height: 0;
  clear: both;
  overflow: hidden;
  display: block;
}

section h2 {
  font-weight: normal;
  color: hsl(222, 10%, 60%);
}

section ul {
  padding: 0;
  margin: 0 0 1.5em 0;
  list-style-type: square;
}

p {
  margin: 0;
}

h1 {
  font-weight: 400;
  font-size: 2.5em;
  line-height: 1em;
  text-transform: uppercase;
}

h2 {
  text-transform: uppercase;
  margin: 0 0 .5em 0;
}

h2,
h3 {
  font-size: 24px;
  line-height: 1.5em;
}

#media {
  float: left;
  padding: 0 1.5em 0 0;
}

#article {
  padding: 1.5em 0 0 0;
}

#article p {
  margin-bottom: 1.5em;
}

li.icon {
  list-style-type: none;
  margin: 0 0 0 -16px;
  padding: 0 0 0 16px;
  background-position: left 50%;
  background-repeat: no-repeat;
}

/*li.icon.external {

}

li.icon.wikipedia {

}

li.icon.youtube {

}*/

li.icon.wikipedia a::before {
  content: 'Wikipedia: ';
}

li.icon.youtube a::before {
  content: 'Youtube: ';
}

#video {
  width: 640px;
  height: 390px;
  display: block;
  border: 16px solid hsl(222, 15%, 0%);
  margin-left: -216px;
  margin-bottom: 2.75em;
}

a {
  color: hsl(0, 0%, 100%);
  border-bottom: 1px dotted hsl(0, 0%, 100%);
  text-decoration: none;
}

a:hover {
  border-bottom: 1px solid hsl(0, 0%, 100%);
}

a.back {
  font-size: 24px;
  line-height: 1.5em;
  text-decoration: none;
  border: none;
  text-transform: uppercase;
}

a.back:hover {
  background-color: hsl(0, 0%, 100%);
  text-decoration: none;
  border: none;
}

a.back::after {
  content: '\2190';
  padding: 0 6px 0 0;
}

a.back:hover::after {
  color: hsl(0, 0%, 0%);
}