Hi there!
Thanks for your query.
You can control your logo height from the basic tab of your Template Options. Here is a sample screenshot for your ease: https://prnt.sc/fTyRJOd0oS4R
If you want it with custom code, then here is the code you need to put in yout custom CSS:
.logo-image {
height: 150px !important;
}
If you want you can publish a module with your desired text in the logo position. You can do this with CSS either:
#sp-header .logo a:after {
content: "Website Name";
}
Note: Path towards custom CSS(Joomla 3): Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.
Hope this helps!
Best Regards