# Adaptive Repository Grid Design

**Date:** 2026-04-28
**Branch:** `feature/adaptive-repo-grid`
**Worktree:** `.worktrees/adaptive-repo-grid`

## Context

The repository page (`themes/danix-xyz-hacker/layouts/repository/single.html`) has a hardcoded `grid-cols-1 md:grid-cols-2 lg:grid-cols-3` layout for Slackware package repo cards. The card data lives in `data/repos.yaml`. When only 1 repo is defined, the card stretches full width — visually poor. When 2 repos are defined, the 3-col grid leaves an empty slot. Maintainability: adding or removing repos from the YAML file requires manual CSS adjustment.

**Goal:** Grid adapts automatically to however many repos are in `data/repos.yaml`. No Hugo template logic required for N > 1. Single-repo edge case handled by CSS `:only-child`.

## Design

### Approach: CSS `auto-fit/minmax` + `:only-child`

Replace the fixed Tailwind grid with a semantic CSS class backed by a custom rule:

**Grid container** (`auto-fit` handles 2+ repos automatically):
```css
.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
```

**Single-card centering** (fires only when exactly 1 card is in the grid):
```css
.repo-card:only-child {
  max-width: 50%;
  margin-inline: auto;
}
```

The `:only-child` rule fires only when the element has no siblings inside the grid — safe for 2, 3, N repos. If a non-card element is ever added inside `.repo-grid`, this rule still works correctly as long as there is only one `.repo-card`.

### Responsive behaviour by count

| Repos | Result |
|-------|--------|
| 1 | Card centered, 50% container width |
| 2 | Two equal columns (each ~50%) |
| 3 | Three equal columns (~33% each) |
| 4+ | Wraps to new rows, min 280px per card |

On small screens `minmax(280px, 1fr)` collapses to a single column naturally — no breakpoint overrides needed.

## Files to Modify

**Theme repo** (`/home/danix/Programming/GIT/danix2-hugo-theme/`):

1. `layouts/repository/single.html` — replace `grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6` class on wrapper div with `repo-grid`; add `repo-card` class to each card div
2. `assets/css/main.css` — add `.repo-grid` and `.repo-card:only-child` rules

**Content repo** (`/home/danix/Programming/GIT/danix.xyz-hacker-theme/`):

3. After CSS change: run `npm run build` to recompile `main.min.css`
4. Commit theme changes, push theme repo, bump submodule pointer in content repo

## Verification

1. `data/repos.yaml` — test with 1 entry: card should be centered at ~50% width
2. `data/repos.yaml` — test with 2 entries: two equal-width columns
3. `data/repos.yaml` — test with 3 entries: three equal-width columns (current default)
4. Resize viewport to mobile: all counts collapse to single column
5. `hugo server` from worktree root (after `git submodule update --init`) to preview live