add this to your css (css module or child theme)
.site-description h2 {
font-size: 18px;
font-style: italic;
}
Add this to your css file (css plugin or child theme)
/* remove the hover effcet from the title */
.site-title h1 a:hover {
text-decoration: none !important;
color: inherit !important;
}
From my point of view it is better to make changes through css than by editing the functions file.
