:root {
  --bg: #0a0a0a;
  --text: #e0e0e0;
  --text-muted: #888;
  --accent: #3b82f6;
  --border: #222;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

html {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
a:hover { opacity: 0.8; }

h1, h2, h3 {
  font-family: var(--font-mono);
  font-weight: 500;
  margin-bottom: 1rem;
  color: #fff;
}

h1 { font-size: 1.8rem; letter-spacing: -0.02em; }
h2 { font-size: 1.4rem; margin-top: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
h3 { font-size: 1.1rem; color: var(--text-muted); }

p { margin-bottom: 1rem; color: var(--text-muted); }

ul { list-style: none; padding-left: 0; }
li { margin-bottom: 0.5rem; position: relative; padding-left: 1.2rem; }
li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}

nav {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
nav a { color: var(--text-muted); }
nav a:hover, nav a.active { color: var(--accent); }

.card {
  background: #111;
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}
.card h3 { margin-bottom: 0.5rem; color: #fff; }
.card p { margin-bottom: 0; font-size: 0.9rem; }

.tag {
  display: inline-block;
  background: #1a1a1a;
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  border: 1px solid #333;
}

footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: #555;
  text-align: center;
}

@media (max-width: 600px) {
  body { padding: 1rem; }
  nav { flex-wrap: wrap; gap: 1rem; }
}