/* Operon — shared stylesheet for simple standalone pages (/404, /privacy/).
   Tokens mirror diagnostic.css so these pages sit in the same visual system.
   Deliberately external, never inline: the site CSP is `style-src 'self'`,
   which blocks inline style attributes and <style> blocks. */
:root {
  --surface: #f6f7f9; --sheet: #fcfcfd; --inset: #eef0f4;
  --ink: #16181d; --ink-2: #555b66; --ink-3: #676d78;
  --accent: #4650c8; --accent-wash: #e8eafb;
  --line: #e3e5ea;
  --on-accent: #ffffff;
  --r-card: 12px; --r-sm: 9px; --r-pill: 999px;
  --measure: 40em;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --surface: #08090b; --sheet: #0e0f11; --inset: #191b1f;
    --ink: #f4f5f7; --ink-2: #9c9fa5; --ink-3: #86898e;
    --accent: #7b87ff; --accent-wash: #181b2d;
    --line: #1e1f21;
    --on-accent: #0a0a14;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding: 0 20px;
  background: var(--surface);
  color: var(--ink);
  font: 16px/1.65 var(--sans);
}
.wrap { max-width: var(--measure); margin: 0 auto; padding: 72px 0 96px; }

.mark {
  font: 600 13px/1 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 40px;
}
.mark:hover { color: var(--accent); }

h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 16px; }
h2 { font-size: 19px; line-height: 1.3; letter-spacing: -.01em; margin: 40px 0 10px; }
p { margin: 0 0 16px; color: var(--ink-2); }
p.lead { font-size: 18px; color: var(--ink-2); }
ul { margin: 0 0 16px; padding-left: 20px; color: var(--ink-2); }
li { margin-bottom: 8px; }
strong { color: var(--ink); font-weight: 600; }
a { color: var(--accent); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; }
.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: var(--r-sm);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-ghost { border-color: var(--line); color: var(--ink); }
.btn:hover { opacity: .9; }

.note {
  background: var(--inset);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 16px 18px;
  margin: 24px 0;
}
.note p:last-child { margin-bottom: 0; }

.updated { font-size: 13px; color: var(--ink-3); margin-top: 48px; }

footer.page-footer {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--ink-3);
}
footer.page-footer a { color: var(--ink-3); }