:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #162032;
  --text-main: #f1f5f9;
  --text-dim: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --border: #223147;
  --success: #10b981;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg-primary); color: var(--text-main); font-family: var(--font-family); line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }
header { background: var(--bg-secondary); border-bottom: 1px solid var(--border); padding: 1rem 2rem; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.brand { font-size: 1.25rem; font-weight: 700; color: var(--accent); text-decoration: none; display: flex; align-items: center; gap: 0.5rem; }
.nav-links { display: flex; gap: 1.25rem; align-items: center; list-style: none; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 0.95rem; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-main); }
.btn-nav { background: var(--accent); color: #000 !important; font-weight: 600; padding: 0.4rem 1rem; border-radius: 6px; }
.btn-nav:hover { background: var(--accent-hover); }
main { max-width: 1200px; margin: 2rem auto; padding: 0 1.5rem; flex: 1; width: 100%; }
footer { background: var(--bg-secondary); border-top: 1px solid var(--border); padding: 1.5rem; text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: auto; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; margin-bottom: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
h1, h2, h3 { color: #fff; margin-bottom: 0.75rem; }
p { color: var(--text-dim); margin-bottom: 1rem; }
code, pre { font-family: 'Consolas', 'Courier New', monospace; background: #080d14; border: 1px solid var(--border); border-radius: 4px; }