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SKILL.md
npx skills add arnavpuri/designskills --skill layout-composition
Grid systems, visual hierarchy, whitespace, and modern CSS layout patterns (grid, flexbox, bento, container queries) for web pages and UI. Use when arranging content on a page or screen. For spacing/radius tokens themselves use design-system; for slide layouts use presentation-design. Trigger phrases: "layout", "grid", "bento grid", "visual hierarchy", "page layout", "flexbox layout", "whitespace", "responsive layout", "composition", "css grid", "container queries"
npx skills add arnavpuri/designskills --skill layout-composition
Build structured, visually compelling layouts using modern CSS.
.agents/design-context.md (see design-context) for Spacing System (4px/8px base), Border Radius, style archetype, and platform priority. Spacing tokens below follow the design-system scale (--space-N = N × 4px); colors use the shared --brand-* / --gray-* primitives from color-palette.Same scale as the design-system skill: --space-N = N × 4px. Do not redefine it if the project already has one.
Ranked by impact (strongest to weakest):
Users scan across the top, partway across the middle, then down the left. Place key info in first two paragraphs, start sections with bold keywords, use left-aligned headings.
Users scan: top-left logo > top-right nav > diagonal to center CTA > bottom. Build landing pages along this diagonal.
Place focal points at 1/3 intersections, not dead center. Slightly off-center placement feels more dynamic.
| Content type | Recommended layout |
|---|---|
| Landing page | Single column + full-width sections |
| Blog / article | Centered single column, max 65ch |
| Dashboard | 12-column grid or sidebar + main |
| Feature showcase | Bento grid |
| Card listing | Auto-fit grid |
| Portfolio | Masonry or offset grid |
| Documentation | Sidebar nav + centered content |
| E-commerce product | 2-col asymmetric (image + details) |
Never ship a layout you haven't looked at. Render the page and screenshot it at three widths, then view each image with Read:
Check each screenshot for: one clear focal point per section, consistent left edges and gutters, no horizontal overflow (in the browser: document.documentElement.scrollWidth > innerWidth must be false), sensible stacking order on mobile (DOM order = reading order; don't reorder visually with order/grid placement in a way that breaks keyboard tab order), and no orphaned single card on the last grid row. Fix and re-screenshot until clean.
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }.page-layout {
display: grid; grid-template-columns: 250px 1fr 300px;
grid-template-rows: auto 1fr auto; min-height: 100dvh;
grid-template-areas: "header header header" "sidebar main aside" "footer footer footer";
}
.header { grid-area: header; } .sidebar { grid-area: sidebar; }
.main { grid-area: main; } .aside { grid-area: aside; } .footer { grid-area: footer; }
@media (max-width: 1024px) {
.page-layout { grid-template-columns: 1fr; grid-template-areas: "header" "main" "sidebar" "aside" "footer"; }
}.navbar { display: flex; align-items: center; justify-content: space-between; padding: 1rem 2rem; gap: 2rem; }.centered-page { display: flex; flex-direction: column; align-items: center; min-height: 100dvh; }
.centered-page main { flex: 1; width: 100%; max-width: 65ch; padding: 2rem; }.card-row { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.card-row > * { flex: 1 1 260px; display: flex; flex-direction: column; } /* wraps instead of squashing on mobile */
.card-row .card-footer { margin-top: auto; }.bento { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 200px; gap: 1rem; }
.bento-large { grid-column: span 2; grid-row: span 2; }
.bento-wide { grid-column: span 2; }
.bento-tall { grid-row: span 2; }.bento-showcase {
display: grid; grid-template-columns: repeat(6, 1fr);
grid-template-rows: repeat(4, 180px); gap: 1rem; padding: 1rem;
}
.bento-showcase > :nth-child(1) { grid-column: 1 / 4; grid-row: 1 / 3; }
.bento-showcase > :nth-child(2) { grid-column: 4 / 7; grid-row: 1 / 2; }
.bento-showcase > :nth-child(5) { grid-column: 1 / 3; grid-row: 3 / 5; }
.bento-showcase > * { border-radius: 1rem; padding: 1.5rem; overflow: hidden; background: var(--gray-100); }
@media (max-width: 768px) {
.bento-showcase { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
.bento-showcase > * { grid-column: auto !important; grid-row: auto !important; }
}.bento-card { border-radius: 1.25rem; padding: 2rem; overflow: hidden; position: relative; display: flex; flex-direction: column; justify-content: space-between; }
.bento-card--gradient { background: linear-gradient(135deg, var(--brand-100), var(--brand-50)); }
.bento-card--dark { background: var(--gray-900); color: var(--gray-50); }:root {
--space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
--space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
--space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;
}
section { padding-block: clamp(4rem, 8vw, 8rem); }
.hero { padding-block: clamp(6rem, 12vw, 12rem); }.section-header { max-width: 600px; margin-inline: auto; text-align: center; margin-bottom: var(--space-16); }
.section-label { font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--brand-600); margin-bottom: var(--space-3); } /* 600: small text needs 4.5:1 */
.section-title { font-size: var(--text-4xl); font-weight: 800; line-height: 1.1; color: var(--gray-900); margin-bottom: var(--space-4); }
.section-description { font-size: var(--text-lg); color: var(--gray-500); line-height: 1.6; }.hero-content { display: grid; grid-template-columns: 2fr 1fr; align-items: center; min-height: 80vh; }.asymmetric { display: grid; grid-template-columns: 1.5fr 1fr; gap: 4rem; align-items: center; }
.asymmetric--reversed { grid-template-columns: 1fr 1.5fr; }.offset-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.offset-grid > :nth-child(3n+2) { transform: translateY(3rem); }
.offset-grid { padding-bottom: 3rem; } /* transform doesn't reserve space */
@media (max-width: 768px) { .offset-grid { grid-template-columns: 1fr; } .offset-grid > * { transform: none; } }.layout { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 350px), 1fr)); gap: 1.5rem; }.reflow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .reflow { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .reflow { grid-template-columns: 1fr; } }.card-container { container-type: inline-size; container-name: card; }
.card { display: flex; flex-direction: column; }
@container card (min-width: 500px) {
.card { flex-direction: row; align-items: center; gap: 2rem; }
.card-image { flex: 0 0 200px; }
}.thumbnail { aspect-ratio: 16 / 9; object-fit: cover; border-radius: 0.75rem; width: 100%; }
.avatar { aspect-ratio: 1; object-fit: cover; border-radius: 50%; }
/* Common ratios: 1:1 avatars, 4:3 cards, 16:9 video, 3:2 photos, 21:9 cinematic */for w in 375 768 1440; do
npx playwright screenshot --full-page --viewport-size=$w,900 "file://$PWD/index.html" layout-$w.png
done