Building a Custom Shopify Theme from Scratch – What Pitfalls Should I Watch

Hey everyone! I’m currently developing a custom Shopify theme for a client instead of using pre-built templates. While I’ve worked with Shopify before, this is my first time building a theme from the ground up. I’d love to hear from others who’ve done this – what common challenges or mistakes should I be aware of? Any advice or must-do practices would be super helpful. I appreciate any help you can provide.