:root {
  --color-bg: #fafafa;
  --color-text: #333;
  --color-text-muted: #666;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e5e5;
  --max-width: 720px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
}

.site-header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-title:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Homepage */
.intro {
  margin-bottom: 3rem;
}

.intro h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.intro p {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

.posts-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.post-list {
  list-style: none;
}

.post-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.post-list li:first-child {
  border-top: 1px solid var(--color-border);
}

.post-list a {
  font-size: 1.125rem;
  font-weight: 500;
}

.post-list time {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Post page */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.post-header time {
  color: var(--color-text-muted);
}

.post-content h2 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

.post-content h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.post-content code {
  background: var(--color-border);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

.post-content pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

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

.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}