:root {
  --bg-base: #0a0a0c;
  --bg-raised: #141418;
  --bg-sunken: #050507;
  --accent: #f97316;
  --accent-hover: #fb923c;
  --accent-glow: rgba(249, 115, 22, 0.15);
  --text-primary: #f0f0f0;
  --text-secondary: #a8a8b0;
  --text-tertiary: #606068;
  --border-subtle: #1e1e24;
  --border-default: #2a2a34;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --blue: #60a5fa;
  --font-sans: system-ui, -apple-system, 'Inter', 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}
* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--bg-raised);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--accent);
}
pre {
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-secondary);
}
pre code { background: transparent; padding: 0; color: inherit; }

.page { min-height: 100vh; display: flex; flex-direction: column; }
.container { max-width: 720px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* Nav */
.site-nav {
  border-bottom: 1px solid var(--border-subtle);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
}
.site-nav-brand { font-weight: 800; letter-spacing: -0.02em; color: var(--text-primary); }
.site-nav-brand a { color: inherit; text-decoration: none; }
.site-nav-brand a:hover { color: var(--accent); }
.site-nav-dot { display: inline-block; width: 8px; height: 8px; background: var(--accent); border-radius: 2px; margin-right: 8px; vertical-align: middle; }
.site-nav-links { display: flex; gap: 24px; color: var(--text-secondary); align-items: center; }
.site-nav-links a { color: var(--text-secondary); }
.site-nav-links a:hover { color: var(--text-primary); text-decoration: none; }
.site-nav-links select.lang-toggle {
  background: var(--bg-raised); color: var(--text-secondary);
  border: 1px solid var(--border-default); border-radius: var(--radius-sm);
  padding: 4px 8px; font-size: 11px; font-family: inherit; cursor: pointer;
}

/* Header */
.page-header {
  padding: 72px 20px 36px;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
}
.page-eyebrow {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.page-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  margin: 12px 0 10px;
  letter-spacing: -0.02em;
}
.page-sub {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto;
}

/* Post list */
.post-list { padding: 48px 20px; flex: 1; }
.post-list-grid { display: flex; flex-direction: column; gap: 0; max-width: 720px; margin: 0 auto; }
.post-card {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
  text-decoration: none;
  color: inherit;
}
.post-card:hover { text-decoration: none; }
.post-card:hover .post-card-title { color: var(--accent); }
.post-card-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  display: flex;
  gap: 14px;
}
.post-card-title {
  font-size: 24px;
  font-weight: 700;
  margin: 8px 0 6px;
  color: var(--text-primary);
  transition: color 0.15s;
  letter-spacing: -0.01em;
}
.post-card-teaser { color: var(--text-secondary); font-size: 15px; }

/* Post article */
.post-article { padding: 56px 20px 72px; flex: 1; }
.post-article article { max-width: 680px; margin: 0 auto; }
.post-article-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  display: flex;
  gap: 14px;
  align-items: center;
}
.post-article h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.post-article .post-sub {
  color: var(--text-secondary);
  font-size: 18px;
  margin: 0 0 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}
.post-article h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 44px 0 14px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.post-article h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 32px 0 10px;
  color: var(--text-primary);
}
.post-article p { color: var(--text-secondary); margin: 0 0 18px; }
.post-article ul, .post-article ol {
  color: var(--text-secondary);
  padding-left: 22px;
  margin: 0 0 18px;
}
.post-article li { margin: 8px 0; }
.post-article li strong { color: var(--text-primary); }
.post-article strong { color: var(--text-primary); }
.post-article hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 40px 0;
}

.post-back { display: inline-flex; align-items: center; gap: 8px; color: var(--text-tertiary); font-size: 13px; text-decoration: none; margin-bottom: 28px; }
.post-back:hover { color: var(--accent); text-decoration: none; }
.post-footer {
  max-width: 680px;
  margin: 48px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.post-footer a { color: var(--text-tertiary); }
.post-footer a:hover { color: var(--accent); text-decoration: none; }

/* Site footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 28px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
}
.site-footer-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.site-footer a { color: var(--text-tertiary); }
.site-footer a:hover { color: var(--accent); text-decoration: none; }

@media (max-width: 640px) {
  .page-header { padding: 48px 20px 28px; }
  .post-article { padding: 32px 20px 56px; }
  .site-nav-links { gap: 14px; }
}