:root {
  --sec-bg: #f8fafc;
  --sec-surface: #ffffff;
  --sec-ink: #182b45;
  --sec-muted: #435267;
  --sec-primary: #244f79;
  --sec-accent: #d8e8f6;
  --sec-dark: #172d48;
  --sec-border: #c9d5e0;
  --sec-panel: #edf3f9;
  --sec-focus: #244f79;
  --sec-button-ink: #ffffff;
  --sec-font: 'Segoe UI', Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --sec-bg: #172d48;
    --sec-surface: #24323b;
    --sec-ink: #f2f5f7;
    --sec-muted: #d2dce2;
    --sec-primary: #d8e8f6;
    --sec-border: #81939e;
    --sec-panel: #24323b;
    --sec-focus: #d8e8f6;
    --sec-button-ink: #172d48;
  }
}