body {
  font-family:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.article-shell {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}

.article-grid {
  display: grid;
  gap: 2rem;
}

.article-copy {
  max-width: 48rem;
}

.article-copy h2 {
  margin-top: 2.5rem;
  font-size: 1.5rem;
  line-height: 1.3;
  font-weight: 700;
  color: #0f172a;
}

.article-copy h3 {
  margin-top: 1.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: #1e293b;
}

.article-copy p,
.article-copy li {
  color: #475569;
  line-height: 1.75;
}

.article-copy p {
  margin-top: 1rem;
}

.article-copy ul,
.article-copy ol {
  margin: 1rem 0 0 1.25rem;
}

.article-copy ul {
  list-style: disc;
}

.article-copy ol {
  list-style: decimal;
}

.article-copy a {
  color: #4f46e5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.fact-box {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border: 1px solid #c7d2fe;
  border-radius: 0.75rem;
  background: #eef2ff;
}

.fact-box p:first-child {
  margin-top: 0;
}

.article-nav {
  display: grid;
  gap: 0.75rem;
}

.article-nav a {
  display: block;
  padding: 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 0.75rem;
  background: white;
  color: #334155;
  font-weight: 600;
}

.article-nav a:hover {
  border-color: #a5b4fc;
  color: #4338ca;
}

@media (min-width: 900px) {
  .article-grid {
    grid-template-columns: minmax(0, 1fr) 17rem;
    align-items: start;
  }

  .article-nav {
    position: sticky;
    top: 1.5rem;
  }
}