Hi there,
You have the following CSS in Customize > Additional CSS:
.gbp-section__tagline {
text-transform: uppercase;
letter-spacing: .14em;
font-weight: 700;
font-size: 14px;
color: var(--contrast-3);
margin-bottom: 1rem;
}
This CSS overrides the .gbp-section__tagline Global Style on the frontend. That’s why any changes you make to the Global Style are not taking effect.
You’ll need to either update or remove this custom CSS so the Global Style can be applied correctly.