Hi,
The header title’s font size is relative to the configurable general font size. If, however, you want to customize those elements separately you’ll need to apply some custom CSS:
body #header-page-title .entry-title {
font-size: 5em; /* failsafe for IE */
font-size: clamp(2.5em, 5vw, 5em );
}
body #header-page-title .byline {
font-size: 1em;
}
These are the default values – adjust them as necessary.
And to remove the italic from the footer text use:
body #site-copyright {
font-style: normal;
}