text-transform capitalize

Hi

no matter what I try I cannot transform the logo to capital letters; for sure I have done the settings in the customizer. I also have added this code to the custom CSS:

.header h1{color:#c30606!important;
font-weight: 600;
font-size: 30px;
letter-spacing: 3.9px;
line-height:22px;padding-top:25px;
text-transform:capitalize!important;}
Everything else works – color, font-weight, etc.

Same thing with the “readmore” at the end of posts.
Any hint?
Reagrds
Hans