:root {
  --text-primary: #24292f;
  --text-secondary: #57606a;
  --accent-color: #0070c9;
  --border-color: #e1e4e8;
  --font-ui:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono",
    monospace;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-ui);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 17px;
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

a {
  color: var(--accent-color);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  font-size: 14px;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-secondary);
}

.site-nav a:hover {
  color: var(--accent-color);
}

.site-nav .subscribe-link {
  color: var(--accent-color);
  font-weight: 600;
}

.archive-note {
  margin-top: 32px;
  padding: 16px;
  background: #f6f8fa;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

.post-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.post-header h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 8px;
}

.post-header .subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin: 0 0 16px;
}

.post-header .byline {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 4px;
}

.post-header .post-links {
  font-size: 14px;
  margin: 0;
}

.post-body img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.post-body figure {
  margin: 24px 0;
}

.post-body figcaption {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

.post-body pre {
  background: #f6f8fa;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.45;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #f6f8fa;
  padding: 0.1em 0.3em;
  border-radius: 4px;
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-body blockquote {
  margin: 16px 0;
  padding-left: 16px;
  border-left: 3px solid var(--border-color);
  color: var(--text-secondary);
}

.post-body hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 32px 0;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 14px;
}

.post-nav a {
  text-decoration: none;
  max-width: 45%;
}

.post-nav a span {
  display: block;
  color: var(--text-secondary);
  margin-top: 2px;
}

.post-nav .newer {
  margin-left: auto;
  text-align: right;
}