Hi bores,
Please use this css to reduce row height on the page title:
#header-meta {
padding: 15px 0 15px; /*You can change value of padding property as per your requirement,[For reference]: http://www.w3schools.com/css/css_padding.asp; */
}
Note: Please use child theme[style.css] to add this css, otherwise your changes will be lost on theme update.
Thanks