andronics/layout-builder

Layout Builder Skill

This skill helps you create modern CSS layouts using Flexbox and CSS Grid through an interactive process. I'll guide you through layout requirements and generate production-ready, responsive code.

What I Can Help With

Flexbox Layouts

• Horizontal and vertical navigation bars
• Card grids with flexible wrapping
• Holy grail layouts (header, footer, sidebar, main content)
• Centered content (horizontal, vertical, or both)
• Equal-height columns
• Space distribution patterns
• Flexible forms and button groups

CSS Grid Layouts

• Responsive grid systems
• Dashboard layouts with named grid areas
• Magazine-style layouts
• Asymmetric grids
• Sidebar + content layouts
• Card masonry layouts
• Complex multi-column designs

Responsive Patterns

• Mobile-first responsive layouts
• Container query-based layouts
• Fluid grids with auto-fit/auto-fill
• Breakpoint-based layout changes
• Responsive navigation patterns

How To Use This Skill

I'll ask you questions about your layout needs and generate the CSS code. Here's what I need to know:

1. Layout Type: Flexbox, Grid, or combination?
2. Purpose: What are you building? (navigation, card grid, page layout, etc.)
3. Responsiveness: Mobile-first? Desktop-first? Specific breakpoints?
4. Constraints: Fixed widths, minimum/maximum sizes, gaps/spacing?
5. Content: Number of items, variable content lengths?

Example Interactions

Example 1: Card Grid

You: "I need a responsive card grid that shows 1 column on mobile, 2 on tablet, and 3 on desktop"

I will provide:

/* Responsive card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 1rem;
}

/* Card styling */
.card {
  display: flex;
  flex-direction: column;
  background: white;
  border-radius: 0.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  overflow: hidden;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

Example 2: Navbar

You: "Create a responsive navbar with logo on left, nav items in center, and button on right"

I will provide:

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar__logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.navbar__nav {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar__nav a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

.navbar__nav a:hover {
  color: #0066cc;
}

.navbar__button {
  padding: 0.5rem 1.5rem;
  background: #0066cc;
  color: white;
  border: none;
  border-radius: 0.25rem;
  cursor: pointer;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
  }

  .navbar__nav {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }
}

Layout Patterns I Know

Flexbox Patterns

Center Anything

.center {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

Sidebar Layout

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  flex: 0 0 250px;
}

.main {
  flex: 1;
}

Card Row

.card-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.card {
  flex: 1 1 300px;
}

Grid Patterns

Holy Grail Layout

.layout {
  display: grid;
  grid-template-areas:
    "header header header"
    "nav main aside"
    "footer footer footer";
  grid-template-columns: 200px 1fr 200px;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  gap: 1rem;
}

.header { grid-area: header; }
.nav { grid-area: nav; }
.main { grid-area: main; }
.aside { grid-area: aside; }
.footer { grid-area: footer; }

Dashboard Grid

.dashboard {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.widget-large {
  grid-column: span 8;
}

.widget-small {
  grid-column: span 4;
}

Best Practices I Follow

✓ Mobile-first approach - Start with mobile layout, enhance for larger screens ✓ Semantic HTML - Use appropriate HTML elements with layout CSS ✓ Flexible units - Use relative units (rem, %, fr) over fixed pixels ✓ Gap instead of margins - Use gap property for consistent spacing ✓ Logical properties - Support RTL languages with logical properties ✓ Container queries - Use when available for truly responsive components ✓ Fallbacks - Provide fallbacks for older browsers when needed ✓ Accessibility - Maintain logical DOM order, ensure keyboard navigation works

When To Use Which Layout System

Use Flexbox When:

• Creating one-dimensional layouts (rows or columns)
• Items need to wrap and reflow
• Content size should drive layout
• Building navigation, toolbars, or button groups
• Centering content
• Distributing space between items

Use Grid When:

• Creating two-dimensional layouts (rows AND columns)
• Items need precise placement
• Creating responsive layouts without media queries
• Building page layouts with defined areas
• Creating complex asymmetric layouts
• Need alignment in both directions

Use Both When:

• Grid for overall page structure
• Flexbox for components within grid cells
• Complex layouts requiring both approaches

Just Ask!

Tell me what layout you need, and I'll guide you through creating it with modern, responsive CSS. I'll ask clarifying questions if needed and provide complete, production-ready code.

Example requests:

• "I need a 3-column responsive layout"
• "Create a centered modal dialog"
• "Build a sticky footer layout"
• "Make a magazine-style grid"
• "Design a responsive navigation menu"
• "Create a dashboard layout with widgets"