:root {
  --sec-bg: #ffffff;
  --sec-surface: #ffffff;
  --sec-ink: #1c303e;
  --sec-muted: #405464;
  --sec-primary: #174c65;
  --sec-accent: #dcecf2;
  --sec-dark: #193a4d;
  --sec-border: #c6d7df;
  --sec-panel: #eff5f8;
  --sec-focus: #174c65;
  --sec-button-ink: #ffffff;
  --sec-font: 'Segoe UI', Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --sec-bg: #193a4d;
    --sec-surface: #24323b;
    --sec-ink: #f2f5f7;
    --sec-muted: #d2dce2;
    --sec-primary: #dcecf2;
    --sec-border: #81939e;
    --sec-panel: #24323b;
    --sec-focus: #dcecf2;
    --sec-button-ink: #193a4d;
  }
}