Single product content layout issue

Dear Sir or Madam,

Our product content displayed quite weird in last 3 days. The layout is changed and it does not look right now. The short description and add to cart button is no longer on the right side next to the product image.. and all product thumbnail under the featured image become really big.. Please help with this issue.

for example:
https://www.jewelboks.com/product/pearl-with-sunray-ear-jackets/