* {
  box-sizing: border-box;
}

:root {
  --text: #1a1a1a;
  --text-muted: #555;
  --bg: #fff;
  --border: #e0e0e0;
  --link: #0066cc;
  --link-hover: #004499;
  --code-bg: #f5f5f5;
  --code-border: #ddd;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e0e0e0;
    --text-muted: #aaa;
    --bg: #1a1a1a;
    --border: #333;
    --link: #66b3ff;
    --link-hover: #99ccff;
    --code-bg: #2a2a2a;
    --code-border: #444;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.cta {
  padding: 0.35rem 0.75rem;
  background: var(--link);
  color: white;
  text-decoration: none;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.cta:hover {
  background: var(--link-hover);
}

main {
  max-width: 48rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.125rem;
  margin: 1.5rem 0 0.75rem;
}

p {
  margin: 0 0 1rem;
}

ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

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

a:hover {
  text-decoration: underline;
}

code {
  font-family: "SF Mono", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 0.25rem;
  border: 1px solid var(--code-border);
}

pre {
  margin: 0 0 1rem;
  overflow-x: auto;
}

pre code {
  display: block;
  padding: 1rem;
  border-radius: 0.25rem;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  background: var(--code-bg);
}

tr:hover td {
  background: var(--code-bg);
}

footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

@media (max-width: 640px) {
  header h1 {
    font-size: 1.5rem;
  }

  .tagline {
    font-size: 1.1rem;
  }

  main {
    padding: 1.5rem 1rem;
  }

  th, td {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  pre code {
    font-size: 0.85rem;
    padding: 0.75rem;
  }
}