/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563eb;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --border: #e5e7eb;
  --code-bg: #f3f4f6;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header and Navigation */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--primary);
}

/* Main content */
main {
  padding: 3rem 0;
  min-height: calc(100vh - 200px);
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: 1rem;
}

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

a:hover {
  text-decoration: underline;
}

/* Post list */
.post-list {
  list-style: none;
}

.post-preview {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

.post-preview:last-child {
  border-bottom: none;
}

.post-preview h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
}

.post-preview h2 a {
  color: var(--text);
}

.post-preview h2 a:hover {
  color: var(--primary);
  text-decoration: none;
}

.post-preview time {
  color: var(--text-light);
  font-size: 0.9rem;
}

.post-preview p {
  margin-top: 0.75rem;
  color: var(--text-light);
}

/* Post page */
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.post-header h1 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.post-meta {
  color: var(--text-light);
  font-size: 0.9rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.post-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.post-content img {
  max-width: 100%;
  height: auto;
  margin: 2rem 0;
  border-radius: 4px;
}

.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

/* Tags */
.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.tag {
  background: var(--bg-alt);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.85rem;
  color: var(--text-light);
  text-decoration: none;
}

.tag:hover {
  background: var(--border);
  text-decoration: none;
}

/* Archive */
.archive-list {
  list-style: none;
  margin-bottom: 2rem;
}

.archive-list li {
  padding: 0.5rem 0;
  display: flex;
  gap: 1rem;
}

.archive-list time {
  color: var(--text-light);
  min-width: 60px;
  font-size: 0.9rem;
}

/* Code blocks */
code {
  background: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
  font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  padding: 0;
}

/* Blockquotes */
blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--text-light);
  font-style: italic;
}

/* Footer */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 640px) {
  nav ul {
    gap: 1rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .post-preview h2 {
    font-size: 1.5rem;
  }
  
  .post-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}