Ole-Morten Duesund
44c8fe26bf
Interactive salary gap calculator (public/lonn/) showing how percentage-based raises amplify absolute salary differences over time. Includes landing page, README, and CLAUDE.md. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
38 lines
1.7 KiB
Markdown
38 lines
1.7 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project Overview
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Interactive web application that visualizes how percentage-based salary increases amplify absolute salary differences over time. Norwegian-language UI ("Lønnsforskjellen vokser" = "The salary gap grows").
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## Architecture
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Hosted at `forskjeller.naiv.no`. Static site in `public/` — no build system, no package manager. Serve `public/` as the site root. Each topic gets its own subdirectory (e.g. `public/lonn/`).
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- `public/lonn/index.html` — Page structure: header, 4 range-slider controls, 4 stat cards, 4 chart canvases, explainer section
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- `public/lonn/style.css` — CSS custom properties in `:root`, CSS Grid layouts, responsive breakpoints at 560px/480px/360px
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- `public/lonn/app.js` — All logic:
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- `fmtKr(n)` / `fmtShort(n)` — Norwegian locale number formatting (nb-NO)
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- `getData()` — Computes compound growth arrays from slider values
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- `baseOpts()` — Shared Chart.js config factory for all 4 charts
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- `update()` — Reads sliders, recalculates, updates DOM and charts (called on every `input` event)
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**External dependencies** (loaded via CDN, no install needed): Chart.js 4.4.1, Google Fonts (Fraunces + DM Sans).
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### Key Design Decisions
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- All 4 charts share `baseOpts()` — modify this for consistent chart styling changes
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- Charts update with `'none'` animation mode for responsive slider interaction
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- Mathematical model: gap = `(B₀ − A₀) × (1 + r)ⁿ`
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## Development
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```bash
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python3 -m http.server 8000 -d public
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# open http://localhost:8000/lonn/
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```
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## Language
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All user-facing text is in Norwegian Bokmål (nb-NO). Use Norwegian for UI strings and `nb-NO` locale for number formatting.
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