* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  min-height: 1280px;
  color: #3b3b3b;
  font-size: 24px;
}

p,
h1,
h2,
h3,
h4,
a {
  margin: 0;
  font-weight: 400;
}

a,
a:visited,
a:hover {
  color: teal;
  text-decoration: none;
  border-bottom: 2px solid currentColor;
}

nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: baseline;
  -ms-flex-align: baseline;
  align-items: baseline;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  background: #f3f3f3;
  padding: 1rem;
  padding-right: 5rem;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.nav__examples {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: baseline;
  -ms-flex-align: baseline;
  align-items: baseline;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.nav__examples > * {
  margin-right: 0.5rem;
}

#intro {
  max-width: 40rem;
  margin: 1rem auto;
  text-align: center;
}

.intro__hed {
  font-size: 2em;
  margin: 2rem auto 0.5rem auto;
}

.intro__dek {
  color: #8a8a8a;
}

#intro {
  margin-bottom: 320px;
}

#outro {
  height: 80vh;
}

@media (min-width: 840px) {
  .nav__examples {
    margin-top: 0;
    margin-left: 2rem;
  }
}

#scrolly {
  position: relative;
  background-color: #f3f3f3;
  padding: 1rem;
}

article {
  position: relative;
  padding: 0;
  max-width: 20rem;
  margin: 5%;
}

.sticky-thing {
  position: -webkit-sticky;
  position: sticky;
  left: 0;
  width: 100%;
  margin: 0;
  background-color: #8a8a8a;
  z-index: 0;
  top: 12.5vh;
  height: 75vh;
  /* Center everything inside */
  display: flex;
  align-items: center;
  justify-content: center;
}

.sticky-thing p {
  font-size: 8rem;
  font-weight: 900;
  color: #fff;
}

.step_intro {
  margin: 0 auto 12rem auto;
}

.step {
  margin: 0 auto 12rem auto;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.1);
}

.step:last-child {
  margin-bottom: 50rem;
}

.step.is-active p {
  background-color: goldenrod;
  color: #3b3b3b;
  opacity: 0.8;
}

.step p {
  text-align: center;
  padding: 1rem;
  font-size: 1.5rem;
  background-color: #3b3b3b;
  opacity: 0.2;
}