Spacing scale · 8px base

space-0-54px
space-18px
space-216px
space-324px
space-432px
space-648px
space-864px
space-1080px
space-1296px

Page · max width 1120px content, 680px reading column

reading-max 680px — paragraphs, FAQ

page-max 1120px · 24px side padding (desktop) · 20px (mobile)

Desktop grid · 12 columns · 24px gutter (≥1024px)

Tablet grid · 8 columns · 24px gutter (768–1023px)

Mobile grid · 4 columns · 16px gutter · 20px margins (<768px)

Section rhythm: 96px top/bottom on desktop (space-12), 64px on mobile (space-8), a 1px border rule between sections.