Mobile first site using SASS and HTML

Thank you for previewing my solution and code!

To better improve my frontend development skills, I would appreciate feedback on the following:

• if there is anything I could do to align to SASS best practices
• background images in CSS, on smaller screen sizes my background images aligns with the photo, but on larger screen sizes the background image (particularly the bottom image) does not align with the photo
• any other feedback that can help me improve my code

Thank you!