demo.css

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
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: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
  font-family: 'sans-serif';
  background: #FFF;
  color: #111;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

h1, h3 {
  font-weight: 600;
  margin: 1rem 0;
}

h1 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

.title {
  margin: 4rem 0;
}

.subtitle {
  color: #363636;
}

.container {
  padding: 1rem;
  max-width: 720px;
  margin: auto;
}

.demo {
  display: flex;
}

.demo > :first-child {
  margin: auto;
}

.demo .s-checkbox {
  margin: .3rem 0;
}

hr {
  background: none;
  border: 1px solid #EEE;
  margin: 2rem 0;
}

.center {
  text-align: center;
}

.btn {
  padding: .5rem 1rem;
  color: #FFF;
  background-color: #324EFF;
  border: 1px solid #324EFF;
  text-decoration: none;
  font-weight: 600;
}

.btn:hover {
  background-color: #2940d3;
}

.btn.secondary {
  color: #324EFF;
  background-color: #FFF;
}

.btn.secondary:hover {
  color: #2940d3;
  border-color: #2940d3;
}