If you care about first load time, then the web font will have a significant impact. However there are no "web safe fonts" eg. fonts that exist on The top 95% m

If you care about first load time, then the web font will have a significant impact. However there are no "web safe fonts" eg. fonts that exist on The top 95% most common systems. You can choose between sans-serif or serif (non fancy, or fancy), and monospace... but you can't really know what font your web page will be displayed in, so better use font-settings (size, etc) that works for most fonts. Never assume an element will have a static with. 800x600 used to be the standard, but now with so many devices the width of the page can be anything... What I usually do is resize the window width using the mouse back and forth, as well as zooming in and out, to see if there are nay issues anywhere, like things looking bad. Assuming the user can use anything from a smartwatch to an 80 inch wide TV.