:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #555;
  --accent: #0f766e;
  --accent-hover: #115e59;
  --border: #e5e7eb;
  --code-bg: #f3f4f6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --fg: #f3f4f6;
    --muted: #a1a1aa;
    --accent: #2dd4bf;
    --accent-hover: #5eead4;
    --border: #27272a;
    --code-bg: #1a1a1a;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

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

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
}

header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}

header nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

header nav a {
  color: var(--muted);
  text-decoration: none;
}

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

h1, h2, h3 {
  letter-spacing: -0.02em;
  line-height: 1.25;
}

h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.75rem;
}

h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

p {
  margin: 0.5rem 0 1rem;
}

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

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

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

li {
  margin: 0.25rem 0;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  background: var(--code-bg);
  border-radius: 4px;
  font-size: 0.9em;
}

code {
  padding: 0.15em 0.35em;
}

pre {
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.4;
}

blockquote {
  margin: 1rem 0;
  padding: 0.25rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: 0.7rem 1.25rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  margin: 0.5rem 0;
}

.cta:hover {
  background: var(--accent-hover);
  color: var(--bg);
}

.muted {
  color: var(--muted);
}

.badge {
  display: inline-block;
  background: var(--code-bg);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.8rem;
  margin-right: 0.4rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

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