:root {
  --bg: #0a0a0a;
  --text: #e0e0e0;
  --muted: #888;
  --accent: #4fc3f7;
  --accent-hover: #81d4fa;
  --card-bg: #151515;
  --border: #2a2a2a;
  --code-bg: #1a1a1a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  text-align: center;
  padding: 3rem 0 2rem;
}

h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

h2 {
  font-size: 1.4rem;
  margin: 2.5rem 0 1rem;
  color: var(--accent);
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

section { margin-bottom: 2rem; }

.hero p {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.cta {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s;
}

.btn.primary {
  background: var(--accent);
  color: #000;
}

.btn.primary:hover { background: var(--accent-hover); }

.btn.secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.secondary:hover { background: #222; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

p code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.card p { color: var(--muted); font-size: 0.9rem; }

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}