Problem Solving & Design 90

Polished brutalist single-page design tightly fits the brief; responsive across mobile/desktop/short viewports with strong typographic hierarchy, though color choices for score bands use raw red/orange/green without nuance.

• +Viewport meta tag present; three distinct `@media` breakpoints (min-width:760px, max-height:670px, max-height:590px) cover mobile, desktop, and compact screens
• +Strong typographic hierarchy using three distinct font families (Archivo Black, Space Mono, Work Sans) for display, mono data, and body
• +Score badge is prominent in the hero block with `aria-live="polite"` for accessibility; history panel uses `<ol>` with semantic column headers
• +Live hours calculation and quality value update on input events give immediate feedback before form submission
• +`aria-labelledby` on `<main>` and `<aside>`, semantic `<label>` wrapping all inputs, `<button type="button">` for clear
• -History panel on mobile stacks below the form in a fixed `minmax(128px,0.58fr)` row — very little vertical space for 7 entries on small screens
• -Score badge color for 'fair' (`--warning: #ffa500`) uses black text which may have contrast issues against orange at small font sizes

Completeness 90

All brief-required features are implemented and wired end-to-end: bedtime/wake inputs, auto hours calculation, quality slider, disruptions count, optional note, scored submission, color-coded badge, and localStorage history with clear button.

• +All five required inputs (bedtime, wake time, quality slider 1–10, disruptions, note) are present and wired in `index.html` + `app.js`
• +Score calculation in `calculateScore()` uses weighted duration factor, quality factor, and disruption penalty — matches brief's formula requirement
• +Color-coded badge (red/yellow/green) rendered via `getScoreBand()` and `score-poor/fair/great` CSS classes
• +localStorage history stores up to 7 entries with date, hours, score; `clearHistory` button resets and re-renders
• +Empty state rendered in `renderHistory()` when no entries exist

Technical Craft 82

Solid vanilla JS/CSS implementation with clean separation of concerns, defensive localStorage parsing, and thoughtful CSS custom-property-driven slider; no secrets or injection risks found.

• +`readHistory()` wraps `JSON.parse` in try/catch and validates `Array.isArray` — defensive localStorage handling
• +`clamp()` utility used consistently for score, quality, disruptions, and hours; edge cases like overnight sleep handled via `wakeOffset` logic
• +CSS slider styled with `--quality-progress` custom property updated via JS `setProperty`, avoiding layout thrash
• +`requestAnimationFrame` used for pulse animation class toggling — avoids forced reflow
• +No build step, no dependencies, no committed secrets; `vercel.json` is minimal and correct
• -No input validation feedback to user if bedtime equals wake time (would produce 0H with no warning)
• -Disruptions input accepts typed values beyond `max=20` via programmatic or paste input; only clamped silently in JS
• -No tests of any kind; purely manual verification required
• -CSS is minified into a single line with no comments, making maintenance difficult