:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #388bfd;
  --code-bg: #1c2128;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

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

header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span { color: var(--accent); }

.nav-links { display: flex; gap: 24px; font-size: 14px; }
.nav-links a { color: var(--text-dim); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

main { padding: 48px 0 80px; }

.hero { margin-bottom: 48px; }
.hero h1 { font-size: 28px; margin-bottom: 8px; }
.hero p { color: var(--text-dim); font-size: 15px; }

.post-list { display: flex; flex-direction: column; gap: 4px; }

.post-item {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 14px;
  transition: border-color 0.15s;
}

.post-item:hover {
  border-color: var(--accent-dim);
  text-decoration: none;
}

.post-meta {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
}

.tag {
  background: var(--code-bg);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--accent);
}

.post-item h2 {
  font-size: 19px;
  color: var(--text);
  margin-bottom: 6px;
}

.post-item p { color: var(--text-dim); font-size: 14px; }

article h1 { font-size: 30px; margin-bottom: 10px; }

.article-meta {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

article h2 { font-size: 22px; margin: 36px 0 14px; }
article h3 { font-size: 18px; margin: 28px 0 10px; }
article p { margin-bottom: 16px; color: var(--text); }
article ul, article ol { margin: 0 0 16px 20px; }
article li { margin-bottom: 6px; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 20px;
  font-size: 13px;
}

code {
  font-family: "SF Mono", Consolas, Monaco, monospace;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

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

blockquote {
  border-left: 3px solid var(--accent-dim);
  padding-left: 16px;
  color: var(--text-dim);
  margin: 20px 0;
}

.back-link { display: inline-block; margin-top: 40px; font-size: 14px; }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 600px) {
  .nav-links { gap: 14px; font-size: 13px; }
  .hero h1 { font-size: 24px; }
}