Unless required by a custom layout or other example, the site uses your system’s default font selection for heading and body text. Custom fonts are hosted locally to comply with recent GDPR rulings.
The title bar fonts are white and use a text shadow to help with legibility on various backgrounds.
Font weights are managed through CSS since Avada does not have this option for system fonts (yet). The h1 uses light (200), h2 is semibold (600), h3-h6 use medium (500), and the body text is normal (400). Occasionally, for stylistic purposes, other weights are used.