Agent Skills: UI Typography and Spacing

UI Typography and Spacing

Design-DNA override: When a project has design-dna.json or equivalent design tokens, those values override ALL defaults below.

Typography Hierarchy

Size and Weight Scale

| Element | Size | Weight | Line Height | Letter Spacing | |---------|------|--------|-------------|----------------| | H1 (page title) | 2.25-3rem | 700-800 | 1.1-1.2 | -0.02em | | H2 (section) | 1.5-2rem | 600-700 | 1.2-1.3 | -0.01em | | H3 (subsection) | 1.25-1.5rem | 600 | 1.3 | 0 | | Body | 1rem (16px min) | 400 | 1.5-1.6 | 0 | | Small/caption | 0.875rem | 400-500 | 1.4 | 0.01em | | Label | 0.75-0.875rem | 500-600 | 1.3 | 0.05em |

Typography Rules

• Max line length: 65-75 characters for body text readability (max-width: 65ch to 75ch)
• Heading-to-body size ratio: At least 1.5x between H1 and body text
• Font weight limit: Never use more than 3 font weights on a single page
• Contrast between levels: Ensure sufficient visual distinction between heading levels (size, weight, or both must differ noticeably)
• Body text minimum: Never smaller than 1rem (16px) for primary body content

Visual Rhythm / Spacing

Spacing Scale

| Level | Desktop | Mobile | CSS Example | |-------|---------|--------|-------------| | Section-to-section | 64-96px | 48-64px | py-16 to py-24 / gap-16 to gap-24 | | Component-to-component | 24-32px | 16-24px | gap-6 to gap-8 | | Element-to-element | 8-16px | 8-16px | gap-2 to gap-4 |

The 2x Rule

Section gaps should be approximately 2x component gaps. Component gaps should be approximately 2x element gaps.

This creates natural visual grouping: elements within a component feel connected, components within a section feel related, sections feel distinct.

Example: If element gaps are 12px, component gaps should be ~24px, section gaps ~48-64px.

Consistency Rule

The same gap value MUST be used for the same element type across ALL sections of a page. If card-to-card spacing is 24px in one section, it must be 24px in every section.