style.css

@import url(//fonts.googleapis.com/css?family=Lato:400,700,900);

html {
  background: #FCD53A;
}

body {
  font-family: 'Lato', sans-serif;
  line-height: 1.4;
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto;
  padding: 0.5rem;
}

h1, h2 {
  font-weight: 900;
  color: #414066;
  margin: 2rem 0 0 0;
  line-height: 1.1;
}
li {
  margin: 0 0 0.5rem 0;
}
ul ul, ol ol, ul ol, ol ul {
  margin-top: 0.5rem;
}
pre code {
  display: block;
  background: #222;
  font: 12px Monaco;
  color: white;
  padding: 1rem;
  overflow: auto;
}
pre code span {
  color: #888;
}

header {
  background: rgba(255, 255, 255, 0.25);
  padding: 2rem;
  margin: 0 0 1rem 0;
}
header p {
  font-size: 0.9rem;
}
header :last-child {
  margin-bottom: 0;
}
header h1 {
  margin: 0 0 0.5rem 0;
}

.final {
  text-align: center;
  padding: 5rem 0;
}

.which {
  text-align: center;
  background: #222;
  padding: 0.5rem 1rem;
  color: white;
  margin: 0 0 1rem 0;
}
.which-warning {
  display: none;
}