custom css applied to a calendar widget

Site URL: https://holidaynerium.com/apartments

hello!

could someone help me apply custom css to the 3 calendar widgets visible +here?

i tried targeting the specific block and even the widget and changing the font and background in css but nothing i did managed to change the font from Lato to Karla (the rest of the site is formatted in Karla), change font size or change the background from #f9f9f9 to #f2f2f2 (the latter is the background colour of the entire site) - these three things are the ones i would most like to be able to change, but if i could also be able to fiddle with the pink colour that's used for showing when the apartments are occupied that would also be grand.

(the widgets are provided by smoobu which is a booking tool, and i unfortunately wasn't able to figure out if there was any way to change the widget within smoobu)

thank you in advance!

Add to Design > Custom CSS

/* Calendar widget */
div#block-yui_3_17_2_1_1648740771065_12292 * {
    font-family: 'Karla' !important;
    font-size: 26px;
}
div#block-yui_3_17_2_1_1648740771065_12292 td.normal {
    background-color: #f2f2f2 !important;
}

@tuanphan thank you so much for your help! with your template i also figured out how to change other stuff in the calendars 😄