:root {
  /* Color System */
  --primary: #1E5F74;      /* Prairie Blue */
  --secondary: #F5A623;    /* Sunset Orange */
  --accent: #4CAF50;       /* Prairie Green */
  --bg-sky: #E8F4F8;       /* Sky White */
  --bg-grass: #F0F7F0;     /* Grass Green White */
  --text-primary: #2D3436;
  --text-secondary: #636e72;
  --text-light: #ffffff;
  --border-color: #dfe6e9;
  
  /* Gradients */
  --gradient-prairie: linear-gradient(180deg, #1E5F74 0%, #4CAF50 100%);
  --gradient-sky: linear-gradient(135deg, #E8F4F8 0%, #ffffff 100%);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Font Sizes */
  --font-size-small: 0.9rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 2rem;

  /* Fonts */
  --font-family-base: "Source Han Sans CN", "Microsoft YaHei", sans-serif;
  --font-family-mongol: "Mongolian Baiti", serif; /* Decorative */
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
  
  /* Transitions */
  --transition-base: all 0.3s ease;

  /* Extended Color Tokens used in HTML inline styles */
  --color-primary: var(--primary);
  --color-secondary: var(--secondary);
  --color-accent: var(--accent);
  --color-text-dark: #2d3436;
  --color-text-light: #ffffff;
  --color-background-light: #ffffff;
  --color-background-soft: #f6f9fb;
  --color-border: #dfe6e9;
  --color-danger: #e74c3c;
}