New update, changed all my pages

I logged into my wordpress webpage today and all the fonts, size of writing on my pages had changed, the spacing between paragraphs and blocks had changed, the height of my navigation menu changed, my pictures on my pages changed size, ive tried to changed them, but for some reason I cant, on my edit page they can be changed, but when I view the actual website nothing chnages

The page I need help with: [log in to see the link]