“min-device-width” did not work.

functions.php in adventure-child:

if ( get_theme_mod(‘title_size_setting’) != ‘4.0’ ) echo ‘    @media only screen and (min-width: 361px) {.header h1 {font-size:’ . get_theme_mod(‘title_size_setting’) . ‘em;}}’ . “\n”;
worked O.K.