:root {
  --bg: #ffffff;
  --fg: #0b0b0b;
  --muted: #5a5a5a;
  --hairline: #e7e7e7;
  --card: #fafafa;

  --max: 1100px;
  --content: 74ch;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --fg: #f2f2f2;
    --muted: #b5b5b5;
    --hairline: #262626;
    --card: #141414;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
a:hover { opacity: 0.9; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
}

.card {
  border: 1px solid var(--hairline);
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
}

.small { font-size: 0.92rem; color: var(--muted); }
.kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  font-size: 0.85rem;
  padding: 2px 6px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--card);
}

.hr { border: 0; border-top: 1px solid var(--hairline); margin: 18px 0; }

.btnRow { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-block;
  padding: 10px 12px;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  text-decoration: none;
  background: var(--card);
}
.btn:hover { opacity: 0.9; }

h1, h2, h3 { line-height: 1.2; }
h1 { font-size: 2.1rem; margin: 0 0 10px; }
h2 { font-size: 1.5rem; margin: 30px 0 10px; }
h3 { font-size: 1.15rem; margin: 22px 0 8px; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
}
pre {
  overflow: auto;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  background: var(--card);
}

blockquote {
  margin: 16px 0;
  padding: 8px 14px;
  border-left: 3px solid var(--hairline);
  color: var(--muted);
}