/* UPG factor card — minimal brand token (Improve #8). No redesign system. */
:root {
  --upg-ink: #1a1a1a;
  --upg-muted: #4a5568;
  --upg-border: #e2e8f0;
  --upg-bg: #fafbfc;
  --upg-accent: #0f4c81;
  --upg-max: 42rem;
  --upg-pad: 1.25rem;
  --upg-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --upg-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  font-family: var(--upg-font);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--upg-ink);
  background: var(--upg-bg);
}

.wrap {
  max-width: var(--upg-max);
  margin: 0 auto;
  padding: var(--upg-pad) var(--upg-pad) 2.5rem;
}

header .crumb {
  font-size: 0.9rem;
  color: var(--upg-muted);
  margin: 0 0 0.75rem;
}

header .crumb a { color: var(--upg-accent); }

h1 {
  font-size: 1.55rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  font-weight: 650;
}

.meta-line {
  font-size: 0.9rem;
  color: var(--upg-muted);
  margin: 0 0 1.25rem;
}

.meta-line code {
  font-family: var(--upg-mono);
  font-size: 0.85em;
}

main section {
  margin: 0 0 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--upg-border);
}

main section:last-of-type { border-bottom: 0; }

h2 {
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
  letter-spacing: 0.01em;
  color: var(--upg-accent);
}

section p { margin: 0.35rem 0; }

.citations ol {
  margin: 0.4rem 0 0;
  padding-left: 1.25rem;
}

.citations li { margin: 0 0 1rem; }

.citations blockquote {
  margin: 0.4rem 0 0.25rem;
  padding: 0.55rem 0.75rem;
  border-left: 3px solid var(--upg-border);
  background: #fff;
  color: var(--upg-muted);
  font-size: 0.95rem;
}

.citations small {
  display: block;
  color: var(--upg-muted);
  font-size: 0.8rem;
}

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

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

.integrity {
  font-weight: 600;
  color: var(--upg-ink);
}