change css style of menu bar(Vuforia studio)

To change font properties you should use this classes:

.list > .item > .button {
 font-size: 20px; 
 font-family: Poppins-ExtraLight;
}

"Poppins" font is not a default font, so you need to import it into Vuforia Studio. To do that, you should do the following steps:

1. Create a "Fonts" folder in "..\PROJECT_NAME\src\phone\resources" folder
2. Import all the .ttf files of the font
3. Add this CSS code:

@font-face {
 font-family: Poppins-ExtraLight;
 src: url('#{$resources}/Fonts/Poppins-ExtraLight.ttf');
}​

In my example I selected the "ExtraLight" font version