Loopstudio landing page with HTML and SCSS

Hello everyone while working on this project I've had some questions.

• What is the best or better way for creating navigation both for mobile and desktop?
• With SCSS is there a better way of organizing files, how do you separate the code? Do you make style blocks for full sections like header and footer or do you go even smaller and create smaller blocks and just combine them in one SCSS folder?
• In case you have any suggestions on how to improve this code I would love to hear them.

Happy codding ^^