:root {
  --nodes-primary: #1C6E8E;
  --nodes-primary-light: #5093AB;
  --nodes-primary-dark: #176A8B;
  --nodes-secondary: #9D9D9D;
  --nodes-secondary-dark: #757575;
  --nodes-accent: #99B8C5;
  --nodes-white: #FFFFFF;
  --nodes-black: #232323;
  --nodes-bg: #F4F7F9;
  --nodes-surface: #FFFFFF;
  --nodes-border: #E2E8EE;
  --nodes-text: #232323;
  --nodes-text-muted: #757575;
  --nodes-header-gradient: linear-gradient(135deg, #176A8B 0%, #1C6E8E 45%, #5093AB 100%);
}