html, body {
  font-family      : Arial, sans-serif;
  min-height       : 100%;
  color            : rgba(0, 0, 0, 0.75);
  line-height      : 1.6;
  background-color : #e0e0e0;
}

body {
  padding          : 2rem 3rem;
  max-width        : 1280px;
  margin           : auto;
  background-color : #f8f8f8;
  box-shadow       : 1px 0 12px -3px rgba(0, 0, 0, .25);
}

#toc-list {
	columns: 12em 3;
}

#note-to-contributors {
	margin: 3em 0;
	line-height: 2;
	background-color: #e1f5fe;
	border-color: #0277bd;
	padding: 1em 0.5em;
	color: rgba(0, 0, 0, 0.9);
}

h1, h2, h3, h4, h5, h6 {
  margin : 0 0 1em;
  color  : rgba(0, 0, 0, 0.9);
}

h2 {
	padding-top : 1em;
	border-top  : 1px solid rgba(0, 0, 0, 0.25);
}

ul {
	padding-inline-start : 2em;
}

blockquote {
	background-color : #e4e4e4;
	padding          : 0.5em;
	border-left      : 5px solid rgba(0, 0, 0, 0.25);
	margin           : 1em;
}

blockquote p {
	margin : 0;
}

blockquote img, li img {
	max-height     : 1em;
	max-width      : 1em;
	vertical-align : text-top;
}