Tabulator : tooltips

[symelmu]

Hello all,

ALL software version info

MacOs with Chrome, Safari or FireFox
bokeh 3.6.1 and panel >= 1.5.2

Description of expected behavior and the observed behavior

The issue occurs in Tabulator when using header_tooltips with a FastListTemplate. The background and font colors of the tooltips are both dark, making the text unreadable.

I couldn't find the CSS responsible for the background color.

Complete, minimal, self-contained example code that reproduces the issue

import pandas as pd
import panel as pn
import random
import numpy as np

pn.extension('tabulator')

n = 100
data = {
    "ID": range(1, n + 1),  
    "Name": [f"Name_{i}" for i in range(1, n + 1)],  
    "Age": [random.randint(18, 70) for _ in range(n)],  
    "Score": [round(random.uniform(50, 100), 2) for _ in range(n)], 
    "Category": [random.choice(["A", "B", "C"]) for _ in range(n)], 
    "Active": [random.choice([True, False]) for _ in range(n)], 
    "Date": pd.date_range("2023-01-01", periods=n), 
    "Comment": [f"Comment_{i}" for i in range(1, n + 1)], 
    "Rating": [round(random.uniform(1, 5), 1) for _ in range(n)], 
    "Value": np.random.randint(100, 500, size=n)}
df = pd.DataFrame(data)

htt = {x: x for x in data.keys()}

tabulator = pn.widgets.Tabulator(df, page_size=10, sizing_mode='stretch_width', header_tooltips=htt)
# app = tabulator  # OK

template = pn.template.FastListTemplate(title="Tabulator test", main=[tabulator])  # bug 

# template = pn.template.BootstrapTemplate(title="Tabulator test", main=[tabulator])  # OK
# template = pn.template.MaterialTemplate(title="Tabulator test", main=[tabulator])  # OK
# template = pn.template.MaterialTemplate(title="Tabulator test", main=[tabulator])  # OK

app = template

app.servable()  
app.show() 

Screenshots or screencasts of the bug in action