:root {
  --fg: #0d0f12;
  --bg: #ffffff;
  --muted: #5b6472;
  --accent: #1e7dff;
  --accent-hover: #0066ee;
  --border: #eaeef3;
  --code-bg: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6edf3;
    --bg: #0d1117;
    --muted: #7d8590;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --border: #30363d;
    --code-bg: #161b22;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

header h1 {
  margin: 0 0 8px 0;
  font-size: 2.5rem;
  font-weight: 700;
}

.lead {
  color: var(--muted);
  margin: 8px 0;
  font-size: 1.25rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 8px 0;
}

nav {
  margin-top: 16px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

main section {
  margin-bottom: 48px;
}

h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1.875rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

code {
  background: var(--code-bg);
  padding: 3px 6px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  padding: 16px;
  border-radius: 8px;
  overflow: auto;
  border: 1px solid var(--border);
}

pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

ul {
  line-height: 1.8;
}

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

a:hover {
  text-decoration: underline;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  background: var(--accent);
  color: #ffffff;
  border-radius: 6px;
  font-weight: 500;
  text-decoration: none;
  margin-right: 12px;
  margin-top: 12px;
  transition: background 0.2s;
}

.button:hover {
  background: var(--accent-hover);
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
}

.button.secondary:hover {
  background: var(--code-bg);
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

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

footer a {
  color: var(--muted);
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  
  header h1 {
    font-size: 2rem;
  }
  
  .lead {
    font-size: 1.1rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  nav {
    gap: 16px;
  }
}