:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --fg-muted: #525252;
  --accent: #0a0a0a;
  --border: #e5e5e5;
  --code-bg: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --fg: #f5f5f5;
    --fg-muted: #a3a3a3;
    --accent: #f5f5f5;
    --border: #262626;
    --code-bg: #171717;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Helvetica,
    Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
}

header .brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--fg);
  font-size: 1rem;
}

header nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.875rem;
  margin-left: 1.5rem;
}

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

h1 {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
  color: var(--fg);
}

p.muted,
.lede {
  color: var(--fg-muted);
}

.lede {
  font-size: 1.125rem;
  line-height: 1.55;
  margin-bottom: 2rem;
}

a {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--fg-muted);
}

ul,
ol {
  padding-left: 1.25rem;
  margin: 0 0 1rem;
}

li {
  margin: 0.25rem 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

.meta {
  color: var(--fg-muted);
  font-size: 0.875rem;
  margin: -0.5rem 0 2rem;
}

.cta {
  display: inline-block;
  background: var(--fg);
  color: var(--bg);
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  margin-top: 1rem;
}

.cta:hover {
  opacity: 0.85;
  color: var(--bg);
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  max-width: 1080px;
  margin: 4rem auto 0;
  color: var(--fg-muted);
  font-size: 0.8125rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

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