[Python] Use CSS for Shiny for Python with ui.tags.style

I want to CSS style my Shiny for Python Input fields, but It somehow doesn't work. I can however style the card headers. Does anyone know, what I am doing wrong? Or can the ui.input* elements not be styled directly?

from shiny import App, render, ui, reactive
from pathlib import Path


app_ui = ui.page_fillable(
ui.panel_title(
ui.row(
ui.column(12, ui.h1("title1")),
)
),
ui.layout_sidebar(
ui.sidebar(
ui.input_text("input_text1", "input_text1", value=""),
ui.input_selectize("input_selectize1", "input_selectize1", choices=["1", "2"]),
ui.input_numeric("input_numeric1", "input_numeric1", value=4),
ui.input_switch("input_switch1", "input_switch1", value=False),
ui.input_action_button("input_action_button1", "input_action_button1"),
width="350px"
),
ui.layout_columns(
ui.card(
ui.card_header("card_header1"),
ui.output_data_frame("card1"),
full_screen=True
),
col_widths=12
)
),
ui.tags.style(
".card-header { color:white; background:#2A2A2A !important; }",
".input-text { color:red; height:0px; }",
".input-numeric { color:red; height:0px; }")
)


def server(input, output, session):

@reactive.event(input.input_action_button1)
def reactive_function1():
pass

@output
@render.data_frame
def card1():
return reactive_function1()

src_dir = Path(__file__).parent / "src"
app = App(app_ui, server, static_assets=src_dir)

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