html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  width: 100%;
  font-family: 'Helvetica Neue', sans-serif;
  background: black;
  color: white;
}

body {
  box-sizing: border-box;
  padding: 48px 24px 80px;
}

main {
  max-width: 760px;
  margin: 0 auto;
}

a {
  color: white;
}

.site {
  display: inline-block;
  margin-bottom: 56px;
  text-decoration: none;
  font-size: 1.1em;
  opacity: 0.7;
}

.site:hover,
.article-list a:hover {
  opacity: 1;
}

h1 {
  font-size: 2.6em;
  margin: 0 0 0.35em;
  letter-spacing: 1px;
}

h2 {
  font-size: 1.35em;
  margin: 2.2em 0 0.65em;
}

p {
  font-size: 1.08em;
  line-height: 1.65;
  margin: 0 0 1.2em;
}

.article-list {
  list-style: none;
  padding: 0;
  margin: 2.5em 0 0;
}

.article-list li {
  margin: 0 0 1.4em;
}

.article-list a {
  text-decoration: none;
  font-size: 1.25em;
  opacity: 0.8;
}

.series {
  opacity: 0.65;
  margin-bottom: 0.5em;
}

.date {
  display: block;
  margin-top: 0.35em;
  font-size: 0.95em;
  opacity: 0.55;
}

article > .date {
  margin-top: 0;
  margin-bottom: 2.5em;
}

.series-title {
  font-size: 1.35em;
  margin: 2.5em 0 0.85em;
  letter-spacing: 0.2px;
}

.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.article-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  text-decoration: none;
  font-size: 1.05em;
  line-height: 1.35;
  opacity: 0.7;
}

.article-nav .previous {
  grid-column: 1;
  padding-right: 24px;
  justify-content: flex-start;
  text-align: left;
}

.article-nav .next {
  grid-column: 2;
  padding-left: 24px;
  justify-content: flex-end;
  text-align: right;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.article-nav .arrow {
  flex: 0 0 auto;
  font-size: 1.25em;
}

@media (max-width: 600px) {
  .article-nav {
    grid-template-columns: 1fr;
  }

  .article-nav .previous,
  .article-nav .next {
    grid-column: 1;
    padding: 18px 0;
  }

  .article-nav .next {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }
}