:root {
  --bg: #ffffff;
  --text: #444444;
  --heading: #1a1a1a;
  --accent: #2563eb;
  --border: #e5e5e5;
  --code-bg: #f5f5f5;
  --mono: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 540px;
  margin: 0 auto;
  padding: 8rem 1.5rem 4rem;
  text-align: center;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.tagline {
  color: var(--text);
  margin-bottom: 1.2rem;
}

.badge {
  margin-bottom: 2rem;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  text-align: left;
  display: inline-block;
}

code {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
}

nav {
  margin-bottom: 3rem;
}

nav a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

nav a:hover { color: var(--heading); }

.sep {
  color: var(--border);
  margin: 0 0.4rem;
}

h2 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

ul {
  list-style: none;
  display: inline-block;
}

ul li { margin-bottom: 0.3rem; }

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

ul a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .container { padding: 5rem 1.2rem 3rem; }
  h1 { font-size: 1.6rem; }
}