Stencil & Tablet demo
Stencil & Tablet

An archaeology-inspired design style pairing bone paper textures and stencil-cut headlines with a saturated six-color earth palette, evoking museum exhibits and ancient tablets.
Category: Cultural & Heritage
Era: 2020s Modern
Prompt: 14.1 KB · 1944 words
**SYSTEM PROMPT — CODING AI BUILD TASK**
**Project: "Stencil & Tablet" — Archival Field-Manual Landing Page**

**Role:** You are a Senior Frontend Engineer and Expert UI Designer. Code a complete, production-grade Landing Page on the first attempt — no questions, no partial output, no "TODO" markers. Every section, state, and interaction specified below must ship in one pass.

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**0. PROJECT BRIEF & CREATIVE DIRECTION (BINDING)**

**0.1 Product & Voice**
* The page sells a fictional product: the **Stencil & Tablet Field Kit** — an archival paper tablet + steel stencil set for designers, archivists, and field researchers.
* Write ALL user-facing copy in **English**, in a confident mid-century catalog voice (e.g., "Printed to last. Built to travel."). **Never use lorem ipsum.**

**0.2 Aesthetic**
* Archival **field manual / museum exhibit guide**: ruled grid lines, mono index codes ("SEC. 01"), catalog-card panels, stencil-cut uppercase display headlines (`letter-spacing: 0.1em`), six-color earth palette, subtle lift shadows, mid-century modern print sharpness.

**0.3 Required Sections (in order)**
Sticky Header (nav + theme toggle) → Hero → Features (3 cards) → How It Works (3 steps) → Testimonials (3 quotes) → Pricing (3 tiers) → FAQ (accordion) → Final CTA (email capture) → Footer (secondary links).

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**1. STRICT RULES & ARCHITECTURE (NON-NEGOTIABLE)**

**1.1 CSS-First Architecture & Zero Inline CSS**
* **No inline CSS:** the `style="..."` attribute is forbidden anywhere in the HTML.
* **Class/ID selectors only:** every design property, layout rule, and state lives in `style.css`.
* **Minimal HTML modifications:** markup stays semantic and style-agnostic — a full retheme must be achievable by editing `style.css` alone.

**1.2 CSS Variables & Theme Tokens**
Define all tokens in `:root` (light) and override in `.dark`:
* **Surfaces & text:** `--bg-primary: #F4EFE0` (Paper), `--bg-secondary: #E2DCC9` (Bone), `--text-primary: #3A2A18` (aged ink), `--text-secondary: #6E5C43`.
* **Brand & state:** `--primary: #A06A3C` (Sienna), `--secondary: #2D7E73` (Teal), `--text-success: #1F5A50` (AA-safe deep teal for body-size text), `--text-error: #A2305F` (AA-safe deep magenta), `--border-default: #C7B99B`, `--border-success: #2D7E73`, `--border-error: #C73B7A`.
* **Raw palette accents** (reserved for large type ≥24px / ≥19px bold, borders, fills, icons): `--ink: #0A0A0A`, `--bone: #E2DCC9`, `--paper: #F4EFE0`, `--sienna: #A06A3C`, `--rust: #A04820`, `--ochre: #C08820`, `--orange: #EE7A2E`, `--teal: #2D7E73`, `--magenta: #C73B7A`. **All six palette colors must appear on the page.** Where the source spec offers two near-identical paper tones, `#F4EFE0` is the canonical surface; `#F0E8D0` may be used only as an alternate panel tone (e.g., hero backdrop texture).
* **Shape & elevation:** `--radius-sm: 2px`, `--radius-md: 4px`, `--radius-lg: 8px` (print-sharp; no pill shapes), `--shadow-sm: 0 1px 2px rgba(58,42,24,0.12)`, `--shadow-md: 0 8px 20px rgba(58,42,24,0.16)`, `--shadow-stamp: 4px 4px 0 var(--ink)` (hard-offset print shadow).
* **Motion & spacing:** `--spacing-gap: 1.5rem`, `--transition-fast: 200ms`, `--transition-normal: 250ms`, `--ease-standard: cubic-bezier(0.4, 0, 0.2, 1)`.
* **Stacking:** `--z-dropdown: 1000`, `--z-modal: 1100`, `--z-toast: 1200`.
* **Typography tokens:** `--font-display: 'Bowlby One', sans-serif`, `--font-stencil: 'Anton', 'Allerta Stencil', sans-serif`, `--font-base: 'Archivo', sans-serif`, `--font-mono: 'Space Mono', monospace`.
* **Contrast pairing:** every light surface token pairs with dark ink text; every dark surface pairs with paper/bone text — enforced in both themes. Never use `#ffffff` anywhere; if a near-white is truly required, use `#fefefe`.

**1.3 Mandatory Dark Mode Support**
* Implement a **"night archive"** dark theme via a `.dark` class on `<html>` **and** a `@media (prefers-color-scheme: dark)` fallback. Dark overrides: `--bg-primary: #17130D`, `--bg-secondary: #262016`, `--text-primary: #F4EFE0`, `--text-secondary: #B9AC8F`, `--primary: #C98F5C`, `--secondary: #4FB3A5`, `--text-success: #57BAA9`, `--text-error: #E57BA8`, `--border-default: #453927`, `--border-success: #4FB3A5`, `--border-error: #E57BA8`, lifted accents (`--rust: #C2603A`, `--ochre: #D2A63E`, `--orange: #F09552`, `--teal: #4FB3A5`, `--magenta: #E57BA8`, `--sienna: #C98F5C`), near-black shadows, and `--shadow-stamp: 4px 4px 0 var(--rust)`.
* Switching must require **zero HTML restructuring** — variable overrides only.
* **Persistence:** store the choice in `localStorage`; first visit falls back to `prefers-color-scheme`. The header carries a visible toggle (Material Symbol `light_mode`/`dark_mode`) with correct `aria-pressed` and `aria-label` ("Toggle dark mode").
* **Explicit exception clause:** the source style spec declared "Dark: None," but dark mode is mandatory under this build standard — implement it regardless.

**1.4 Flexbox Layout & Mobile-First Alignment**
* Build all layout structures with **Flexbox**. **Every flex container defaults to `align-items: center`** unless an exception is explicitly justified in a CSS comment (single allowed exception: card/tier rows use `align-items: stretch` for equal heights).
* Mobile-first: rows collapse to columns at breakpoints; **no horizontal scrolling** at any width; touch targets ≥44×44px.

**1.5 Framework & Naming**
* Use **Tailwind CSS (Play CDN)** for layout utilities only (flex, wrap, gap, responsive prefixes). All colors, typography, and component styling come exclusively from CSS variables and component classes in `style.css` — never Tailwind color utilities.
* **One convention: BEM** (`.card`, `.card__title`, `.card--featured`). Never mix conventions; never invent one-off classes.

**1.6 Typography & Icons (Google Fonts Mandatory)**
* Include Google Fonts via `<link>` with preconnect — families: **Bowlby One** (hero display), **Anton** + **Allerta Stencil** (stencil-cut section headings), **Archivo** (body), **Space Mono** (index codes/labels) — bound to the font tokens in 1.2.
* Icons: **Google Material Symbols (Outlined)** via its official stylesheet. **Raw inline SVGs and local icon files are forbidden.**
* Uppercase + `letter-spacing: 0.1em` applies to display headlines, eyebrows, buttons, and labels only — never to paragraphs.
* **Explicit exception clause:** the source spec named the local font `'Stencil'`, which is not on Google Fonts; substitute **'Allerta Stencil'** to satisfy the Google Fonts mandate, keeping **Anton** as the primary stencil-cut face per the spec.

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**2. COMPONENT DESIGN SPECIFICATIONS — ALL STATES REQUIRED**

**2.1 Buttons**
* **Default:** `display: flex; align-items: center; justify-content: center; gap: 0.5rem;` minimum 44×44px, uppercase, `--radius-sm`.
* **Hover:** brightness/`--shadow-md` shift, `cursor: pointer`, 200–250ms.
* **Focus:** distinct visible ring (`outline`/`box-shadow` from `--primary` or `--secondary`) for keyboard navigation.
* **Active:** `transform: scale(0.97)`.
* **Loading:** blocks pointer events and double-clicks; renders a CSS spinner or animated Material Symbol **without changing button dimensions**; `aria-busy="true"`.
* **Disabled:** `opacity: 0.5`, grayscale, `cursor: not-allowed`.
* **Success/Error:** feedback classes driven by `--text-success` / `--text-error`.
* **Variants:** `.btn` (Ink fill, Paper text), `.btn--outline`, `.btn--accent` (Sienna or Orange fill + Ink text, large/bold only), `.btn--ghost`, `.btn--danger` (magenta family, distinct in both themes — define even if unused).

**2.2 Cards** (Features, Pricing tiers, Testimonials)
* **Default:** flexbox layout, `--bg-secondary` surface, 1px `--border-default`, `--radius-md`, `--shadow-sm`, mono index-code header.
* **Hover:** `transform: translateY(-2px)` + `--shadow-md` (250ms).
* **Focus-within:** border highlight when a child link/button receives focus.
* **Loading:** shimmer skeleton class defined in CSS (no layout jumps).
* **Empty state:** fallback pattern (Material Symbol + guidance text) defined for dynamic slots.

**2.3 Forms & Inputs** (Final CTA email capture)
* **States:** empty, focused (outline ring), filled, valid (teal border + `check` icon), invalid (`--border-error`, error icon, message), disabled, read-only.
* **Structure:** `.input-group` flex container wrapping `<label>`, `<input type="email">`, and a dedicated `.input-group__error` container announced via `aria-live="polite"`. Use `novalidate` + custom JS validation; on submit run Loading → Success (button + inline confirmation) or Error (icon + message). Never signal state by color alone — pair icons and text with every state.

**2.4 Modal / Popup** (Pricing "Plan details" — required)
* Each pricing card exposes a **"Plan details"** control opening one reusable modal with all states: **Opening** (fade + scale via CSS transition), **Open**, **Loading** (brief skeleton state, ~400ms), **Success/Error** feedback class, **Closing** animation.
* **UX:** centered flex overlay (`align-items: center`), backdrop `rgba(10,10,10,0.7)`, close button = Material Symbol `close`, keyboard **focus trap**, focus returns to the trigger on close, closes via `Esc` and overlay click, `role="dialog"`, `aria-modal="true"`, `aria-labelledby`, body scroll locked, layered at `--z-modal` above the sticky header.

**2.5 FAQ Accordion**
* Each item: `<h3><button aria-expanded aria-controls>` + panel (`role="region"`). Panels open/close via CSS transition (250ms); Material Symbol `expand_more` chevron rotates 180°. Fully keyboard operable; visible focus ring; no hover-only interaction.

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**3. CORE UX & MICRO-INTERACTION RULES (GLOBAL)**

* **Responsive by default:** fluid `clamp()` type scale, standard breakpoints, zero horizontal overflow; smooth anchor scrolling with `scroll-margin-top` for the sticky header (disabled under `prefers-reduced-motion`).
* **Smooth animations:** every state change transitions in 200–250ms; fully respect `prefers-reduced-motion` (no transforms, lifts, shimmer, or modal animation).
* **Accessibility:** WCAG AA contrast in **both** themes — body text ≥4.5:1, large text/UI ≥3:1 (the pairings in 1.2/1.3 already comply; verify). Never rely on color alone. Semantic HTML5 (`header`, `main`, `section`, `nav`, `footer`), one `<h1>` (hero), logical heading order, a skip-to-content link as the first focusable element, full keyboard operability, `aria-live` regions for form feedback and dynamic states.
* **Mandatory visual feedback:** every click, hover, and submission triggers a visible state change.
* **Destructive actions:** `.btn--danger` must be visually distinct in both themes (defined even if unused).
* **Theme signature effects (required):** field-manual ruled grid backgrounds via `repeating-linear-gradient` (1px `--border-default` lines, ~36px cells) in Hero and Final CTA; hard-offset "stamp" shadows on display headlines and featured panels; double-rule section dividers; every section header prefixed with a mono index code (e.g., `SEC. 01 — FEATURES`); registration-mark corner accents on the hero panel via pure CSS pseudo-elements.

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**4. DELIVERABLE & OUTPUT FORMAT**

* **Files:** exactly `index.html`, `style.css`, `script.js`. The HTML contains a single deferred entry point (`<script src="script.js" defer>`) plus the external Tailwind/Fonts/Material Symbols links — no inline `<script>` blocks, no inline styles.
* **Naming:** BEM everywhere (per 1.5); one consistent convention across the deliverable.
* **Copy:** all user-facing copy authored in English per 0.1 — no lorem ipsum, no unrequested placeholder content. Footer links without real destinations may use `href="#"` with descriptive labels.
* **JS scope (script.js):** theme toggle + `localStorage` persistence, mobile nav, accordion, modal (open/close, focus trap, `Esc`, overlay click), email form validation + simulated submit states. No other dependencies.

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**5. SECTION-BY-SECTION BUILD SPEC**

1. **Header (sticky):** wordmark "STENCIL & TABLET" (`--font-stencil`), anchor nav (Features / How It Works / Testimonials / Pricing / FAQ), theme toggle (1.3), Material Symbol `menu` button on mobile toggling a `--z-dropdown` panel (column flex; closes on link click and `Esc`). Ruled bottom border.
2. **Hero:** ruled-grid backdrop + registration marks; mono eyebrow `FIELD MANUAL — VOL. 01 / EST. 1958`; Bowlby One stencil-cut headline (e.g., "TOOLS FOR THE FIELD.") with stamp shadow; one-sentence subcopy; CTA row — primary `.btn` "Get the Field Kit" + `.btn--outline` "See How It Works" (full-width on mobile); mono index strip below ("FIG. 01 — SIX EARTH COLORS / ARCHIVAL PAPER / BUILT TO TRAVEL").
3. **Features — `SEC. 01`:** three `.card`s, each with a mono index (`FIG. 01/02/03`), a Material Symbol icon in an accent chip (one accent per card: Sienna, Teal, Orange), an Anton heading, and two sentences of copy; hover lift per 2.2.
4. **How It Works — `SEC. 02`:** three steps with large mono/orange numerals (`01 02 03`), icon, Anton heading, copy; steps joined by a ruled connecting line on desktop, stacked column on mobile.
5. **Testimonials — `SEC. 03`:** three catalog-card quotes (Material Symbol `format_quote`), quote in Archivo italic, then name, role in `--text-secondary`, and a mono registration tag (e.g., `REG. NO. 0117`).
6. **Pricing — `SEC. 04`:** three tiers ("Scout" / "Surveyor" / "Expedition"); middle tier featured with a 2px `--ochre` border + "STANDARD ISSUE" text tag + `--shadow-md`; each card: large Anton price, billing note, feature checklist (Material Symbol `check` in teal), a CTA button with all 2.1 states, and the "Plan details" modal trigger (2.4).
7. **FAQ — `SEC. 05`:** five to six accordion items (2.5) in field-manual voice (paper weight, stencil care, shipping, returns, institutional orders).
8. **Final CTA — `SEC. 06`:** inverted panel — light mode: Ink background + Bone text; dark mode: Bone background + Ink text (swapped via tokens, never hardcoded). Stencil headline ("ISSUE YOURS TODAY."), supporting copy, and the email capture `.input-group` with all 2.3 states; ruled-grid texture on the panel.
9. **Footer:** double-rule top border; wordmark + mono tagline; three groups of secondary links (Kit / Support / Company); bottom row with copyright and mono credit line ("Printed in the field."). Do not duplicate the theme toggle.

Build it now — complete, themed, accessible, and fully interactive in a single pass.