Customize Twenty Twenty One Theme

Header

Change Header Color Size

header#masthead {
max-width: 100% !important;
padding-left: 10%;
padding-right: 10%;
background: red !important;
padding-bottom: 2%;
padding-top: 2%;
}

Change Header Font Color

Subjects	URL
CSS Tricks	https://allaboutbasic.com/2021/01/05/wordpress-theme-twenty-twenty-one-modifications-and-customizations-of-headers-fonts-styles-and-more/
CSS Tricks	sevenspark.com/docs/ubermenu-3/theme-integration/twenty-twenty-one
Theme Customization	kinsta.com/blog/twenty-twenty-one-theme/#customizing-a-template-file
Review	torquemag.io/2021/01/twenty-twenty-one-review/
Child Theme	blog.hubspot.com/website/wordpress-create-child-theme