Theming

<CSVImporter
  darkMode={true}
  primaryColor="#8B5CF6"
/>

<CSVImporter
  customStyles={{
    // Typography
    'font-family': 'Inter, sans-serif',
    'font-size': '14px',
    'base-spacing': '1rem',
    
    // Shape
    'border-radius': '8px',
    
    // Primary colors
    'color-primary': '#3B82F6',
    'color-primary-hover': '#2563EB',
    
    // Secondary colors  
    'color-secondary': '#10B981',
    'color-secondary-hover': '#059669',
    
    // Tertiary colors
    'color-tertiary': '#8B5CF6',
    'color-tertiary-hover': '#7C3AED',
    
    // Text colors
    'color-text': '#111827',
    'color-text-soft': '#6B7280',
    'color-text-on-primary': '#FFFFFF',
    'color-text-on-secondary': '#FFFFFF',
    
    // Backgrounds
    'color-background': '#FFFFFF',
    'color-background-modal': '#F9FAFB',
    'color-input-background': '#F3F4F6',
    'color-input-background-soft': '#F9FAFB',
    'color-background-menu-hover': '#F3F4F6',
    
    // Borders
    'color-border': '#E5E7EB',
    
    // Misc
    'color-importer-link': '#3B82F6',
    'color-progress-bar': '#10B981'
  }}
/>

// Minimal
const minimal = {
  'border-radius': '0px',
  'color-primary': '#000000',
  'color-border': '#000000'
};

// Gradient
const gradient = {
  'border-radius': '16px',
  'color-primary': '#667EEA',
  'color-primary-hover': '#5A67D8',
  'color-secondary': '#ED64A6'
};

// Corporate
const corporate = {
  'font-family': 'Arial, sans-serif',
  'border-radius': '4px',
  'color-primary': '#0066CC',
  'color-border': '#CCCCCC'
};