body {
  background: #000;
  color: #ddd;
  font-family: BlinkMacSystemFont, -apple-system, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  font-weight: 200;
}

a:link, a:visited {
  color: #aaa;
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 200;
  font-size: 1rem;
  margin: 0;
}

p {
  line-height: 1.5;
}

.heading-1 {
  font-size: 2rem;
}

.heading-2 {
  font-size: 1.5rem;
}

.small {
  font-size: 80%;
}

.app {
  display: flex;
  width: 100vw;
  min-height: 100vh;
  align-items: stretch;
  flex-direction: column;
  justify-content: space-between;
}

.app-head, .app-foot {
  display: block;
  flex-grow: 0;
  flex-shrink: 0;
  padding: 3rem;
  text-align: center;
}

.app-body {
  display: flex;
  flex-grow: 1;
  flex-shrink: 0;
  align-items: center;
}

.container {
  display: block;
  margin: auto;
}

.centered {
  text-align: center;
}

.button {
	display: inline-block;
	padding: 1rem 2rem;
	border: 1px #ddd solid;
  border-radius: 0.5rem;
	background: none;
	color: inherit;
  transition: all 500ms 0s ease;
}

.button:disabled {
  opacity: 0.0;
}

.button:focus {
	outline: none;
}

.button:active {
	background: #ddd;
	color: #000;
}

.button > span {
	vertical-align: middle;
}

#wireframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
}