Responsive Landing Page Utilizing SCSS/SASS

I notice throughout my solutions that there are very slight differences in typography (such as letter spacing) as well as margin/padding differences. I tried to tinker with these numbers in my code despite the Figma design, but I still struggled to find a solution. I do not want to overuse absolute positioning. I'd prefer to stick with flexbox/grid whenever possible.

If anybody can help me with this or let me know what I'm doing wrong to not achieve pixel perfect, I'd super appreciate it!