Key stats टेबल की स्टाइलिंग

from dash import Dash, dcc, html, Input, Output, callback
import plotly.express as px
import pandas as pd
from dash_ag_grid import AgGrid
ecom_sales = pd.read_csv('/usr/local/share/datasets/ecom_sales.csv')
logo_link = 'https://assets.datacamp.com/production/repositories/5893/datasets/fdbe0accd2581a0c505dab4b29ebb66cf72a1803/e-comlogo.png'
key_stats_tb = ecom_sales.groupby(['Country','Major Category', 'Minor Category'])['OrderValue'].agg(['sum', 'count', 'mean']).reset_index().rename(columns={'count':'Sales Volume', 'sum':'Total Sales ($)', 'mean':'Average Order Value ($)'})

money_fmt = {"function": ("params.value.toLocaleString('en-US', {style: 'currency', currency: 'USD'})")}
column_defs = [
  {"field": "Country"},
  {"field": "Major Category"},
  {"field": "Minor Category"},
  {"field": "Total Sales ($)", "valueFormatter": money_fmt},
  {"field": "Average Order Value ($)", "valueFormatter": money_fmt},
  {"field": "Sales Volume"},
]

grid = AgGrid(
  columnDefs=column_defs,
  rowData=key_stats_tb.to_dict("records"),
  defaultColDef={
    # Apply styling to all cells
    "____": {
      # Style content aligned left
      "____": "____",
      # Style background color and text color
      "____": "____",
      "____": "____"}}
)

app = Dash()
app.layout = [
  html.Img(src=logo_link, style={'margin':'30px 0px 0px 0px' }),
  html.H1('Sales Aggregations'),
  html.Div([
    html.H2('Key Aggregations'),
    grid],
    style={'width':'850px', 'height':'750px', 'margin':'0 auto'}
    )
]

if __name__ == '__main__':
    app.run(debug=True)