THANKS, fitnessbodyblog! I found the style.css file in /wp-content/themes/hueman. Is it in that file where I make the edit? (sorry, bit of a newcomer to this).
Also, when I locate “.site-title” the code looks like (and I assume this is where I would change “float: left” to “float: none”?):
.site-title { font-size: 42px; font-weight: 600; letter-spacing: -0.5px; float: left; line-height: 60px; padding: 10px 0; }
.site-title a { display: block; color: #fff; float: left; max-width: 100%; white-space: nowrap; }
.site-title a img { float: left; display: block; max-width: 100%; max-height: 60px; height: auto; padding: 0; margin: 0 auto; -webkit-border-radius: 0; border-radius: 0; }
.site-description { font-size: 16px; font-style: italic; color: #fff; color: rgba(255,255,255,0.5); float: left; margin-left: 20px; line-height: 60px; padding: 10px 0; }
John