* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: #222;
  background: #fafafa;
  margin: 0;
  padding: 0;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.5rem;
}

header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #ddd;
}

header a {
  color: #333;
  text-decoration: none;
  font-weight: 600;
}

header a:hover {
  text-decoration: underline;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

/* Index page - post list */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  margin-bottom: 1.25rem;
}

.post-list a {
  color: #333;
  text-decoration: none;
  font-weight: 500;
}

.post-list a:hover {
  text-decoration: underline;
}

.post-list .date {
  font-size: 0.875rem;
  color: #666;
  margin-top: 0.25rem;
}

/* Post page - article content */
article {
  margin-top: 0;
}

article h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

article h2 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

article p {
  margin: 0 0 1rem;
}

article code {
  background: #eee;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

article pre {
  background: #222;
  color: #eee;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
}

article pre code {
  background: none;
  padding: 0;
  color: inherit;
}

article ul, article ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

@media (max-width: 480px) {
  main {
    padding: 1rem;
  }
}