* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
}

header {
  padding: 20px 0;
  border-bottom: 1px solid #eee;
  margin-bottom: 30px;
}

header nav {
  font-size: 0.9rem;
}

header nav a {
  color: #555;
  text-decoration: none;
}

header nav a:hover {
  color: #000;
  text-decoration: underline;
}

header nav .sep {
  margin: 0 8px;
  color: #ccc;
}

main h1 {
  margin-bottom: 10px;
  font-size: 2rem;
}

main p {
  margin-bottom: 16px;
}

main ul {
  margin: 20px 0;
  padding-left: 24px;
}

main ul li {
  margin-bottom: 8px;
}

main ul .date {
  color: #888;
  font-size: 0.85rem;
}

main .post-date {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 24px;
}

main a {
  color: #0366d6;
  text-decoration: none;
}

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

main h2, main h3, main h4 {
  margin-top: 24px;
  margin-bottom: 12px;
}

main pre {
  background: #f6f8fa;
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

main code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.9em;
}

main :not(pre) > code {
  background: #f0f0f0;
  padding: 2px 6px;
  border-radius: 3px;
}

main blockquote {
  border-left: 4px solid #dfe2e5;
  padding-left: 16px;
  margin: 16px 0;
  color: #6a737d;
}

main table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
}

main table th, main table td {
  border: 1px solid #dfe2e5;
  padding: 8px 12px;
  text-align: left;
}

main table th {
  background: #f6f8fa;
  font-weight: 600;
}

main img {
  max-width: 100%;
  height: auto;
}

main input[type="checkbox"] {
  margin-right: 6px;
}

footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #eee;
  text-align: center;
  font-size: 0.85rem;
  color: #888;
}