:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #555;
  --accent: #c0392b;
  --code-bg: #f4f4f4;
  --border: #e2e2e2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e6e6e6;
    --muted: #9aa0a6;
    --accent: #ff6b5e;
    --code-bg: #22262c;
    --border: #2d3138;
  }
}

* { box-sizing: border-box; }

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

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

h1 {
  margin: 0 0 .25rem;
  font-size: 2.4rem;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 1rem;
}

h2 {
  margin: 2.5rem 0 .75rem;
  font-size: 1.3rem;
}

section { border-top: 1px solid var(--border); padding-top: .5rem; }

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

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .9rem;
}

p code, li code {
  background: var(--code-bg);
  padding: .1rem .35rem;
  border-radius: 4px;
}

ol, ul { padding-left: 1.25rem; }
li { margin: .35rem 0; }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}