*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #efefef;
  color: #666666;
  line-height: 1.6;
}

.page {
  max-width: 56rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
}

@media (min-width: 640px) {
  .page {
    padding: 2rem 1.5rem 2.5rem;
  }
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: #191919;
}

@media (min-width: 640px) {
  h1 {
    font-size: 1.875rem;
  }
}

.lead {
  margin: 0;
  font-size: 1rem;
  color: #666666;
}

@media (min-width: 640px) {
  .lead {
    font-size: 1.125rem;
  }
}

section {
  margin-top: 1.75rem;
}

h2 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 500;
  color: #191919;
}

@media (min-width: 640px) {
  h2 {
    font-size: 1.25rem;
  }
}

p {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  color: #666666;
}

@media (min-width: 640px) {
  p {
    font-size: 1rem;
  }
}

.subtitle {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #191919;
}

@media (min-width: 640px) {
  .subtitle {
    font-size: 1rem;
  }
}

ul {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: #666666;
}

@media (min-width: 640px) {
  ul {
    font-size: 1rem;
  }
}

li + li {
  margin-top: 0.5rem;
}

ul.plain {
  list-style: none;
  padding-left: 0;
}

ul.plain li + li {
  margin-top: 1rem;
}

a {
  color: #df3234;
  font-weight: 500;
  text-underline-offset: 2px;
}

.back {
  display: inline-block;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  text-decoration: none;
}

.back:hover {
  text-decoration: underline;
}