Use system UI fonts
In the English version and on some operation systems, unwanted line breaks occur (live feedback).
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
"Oxygen", "Ubuntu", "Helvetica Neue", Arial, sans-serif,
"Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol";
Edited by Klaus-Dieter Quibeldey-Cirkel