:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-elevated: #18181b;
  --bg-card: #141416;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --accent: #f59e0b;
  --accent-dim: #d97706;
  --accent-glow: rgba(245, 158, 11, 0.15);
  --accent-subtle: rgba(245, 158, 11, 0.08);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --font-display: 'Inter', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Nav */
.blog-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  color: var(--bg-primary);
}

.logo-text {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Blog Index */
.blog-hero {
  padding: 80px 0 48px;
  text-align: center;
}

.blog-hero h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.blog-hero p {
  font-size: 18px;
  color: var(--text-secondary);
}

.blog-list {
  padding: 0 0 96px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.blog-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: all 200ms ease;
}

.blog-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.4);
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.blog-card-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
}

.blog-card-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-subtle);
  color: var(--accent);
}

.blog-card h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.blog-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Blog Post */
.post-header {
  padding: 80px 0 48px;
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: none;
  margin-bottom: 32px;
  transition: color var(--transition-fast);
}

.post-back:hover { color: var(--accent); }

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-tertiary);
}

.post-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-subtle);
  color: var(--accent);
}

.post-header h1 {
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.post-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Post Content */
.post-content {
  padding: 0 0 96px;
}

.post-content h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 48px 0 16px;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 12px;
}

.post-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.post-content strong {
  color: var(--text-primary);
}

.post-content em {
  color: var(--accent);
  font-style: normal;
}

.post-content ul, .post-content ol {
  margin: 0 0 20px 24px;
  color: var(--text-secondary);
}

.post-content li {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 8px;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 16px 24px;
  margin: 24px 0;
  background: var(--accent-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.post-content blockquote p {
  color: var(--text-primary);
  font-size: 15px;
  margin-bottom: 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

.post-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 24px 0;
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Footer */
.blog-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.blog-footer p {
  font-size: 13px;
  color: var(--text-tertiary);
}

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

/* Responsive */
@media (max-width: 768px) {
  .blog-hero h1 { font-size: 36px; }
  .blog-card { padding: 24px; }
  .blog-card h2 { font-size: 18px; }
  .nav-links { display: none; }
}