/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #24292e;
  background: #fafafa;
}

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

/* Layout */
.site-header {
  background: #fff;
  border-bottom: 1px solid #e1e4e8;
  padding: 1rem 0;
}
.site-header .inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #24292e;
}
.site-nav a {
  margin-left: 1.5rem;
  color: #586069;
  font-size: 0.9rem;
}
.site-nav a:hover { color: #0366d6; text-decoration: none; }

.page-content {
  max-width: 800px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

footer {
  text-align: center;
  padding: 2rem 0;
  color: #586069;
  font-size: 0.85rem;
  border-top: 1px solid #e1e4e8;
  margin-top: 3rem;
}

/* Post list */
.post-list { list-style: none; }
.post-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid #e1e4e8;
}
.post-list li:last-child { border-bottom: none; }
.post-meta { font-size: 0.85rem; color: #586069; margin-top: 0.25rem; }
.post-title { font-size: 1.15rem; font-weight: 600; }

.category-tag {
  display: inline-block;
  background: #f1f8ff;
  color: #0366d6;
  border: 1px solid #c8e1ff;
  border-radius: 3px;
  padding: 0.1rem 0.5rem;
  font-size: 0.78rem;
  margin-left: 0.5rem;
}

/* Post page */
.post-header { margin-bottom: 2rem; }
.post-header h1 { font-size: 2rem; line-height: 1.3; }
.post-header .post-meta { margin-top: 0.5rem; }

.post-content h1, .post-content h2, .post-content h3 {
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
}
.post-content p { margin-bottom: 1rem; }
.post-content ul, .post-content ol { margin: 0.75rem 0 1rem 1.5rem; }
.post-content li { margin-bottom: 0.25rem; }
.post-content code {
  background: #f6f8fa;
  border: 1px solid #e1e4e8;
  border-radius: 3px;
  padding: 0.1em 0.35em;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, monospace;
}
.post-content pre {
  background: #f6f8fa;
  border: 1px solid #e1e4e8;
  border-radius: 6px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1.25rem 0;
}
.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.88em;
}
.post-content blockquote {
  border-left: 4px solid #dfe2e5;
  padding-left: 1rem;
  color: #6a737d;
  margin: 1rem 0;
}

/* Categories page */
.category-section { margin-bottom: 2.5rem; }
.category-section h2 { font-size: 1.3rem; margin-bottom: 1rem; padding-bottom: 0.4rem; border-bottom: 2px solid #e1e4e8; }

/* Page heading */
.page-heading { font-size: 1.8rem; margin-bottom: 1.5rem; }