System Requirements Document for tshirts-landing-page

1. Introduction

Product intent. tshirts-landing-page is a single public web landing page that presents a stylish t-shirt showcase. The page exists to make a strong, confident first impression of a t-shirt brand through an oversized, quoted, industrial-style headline composition and continuous animated scrolling/slide motion, populated entirely with dummy (placeholder) product data.

Audience. The audience is a young, style-literate shopper who scrolls fast, reads labels and tags as content, and treats a t-shirt as a statement rather than a basic. The emotional register is confident, ironic, industrial and energetic — closer to a drop announcement than a friendly shopfront.

Scope of this document. This SRD specifies exactly the accepted current behavior: one anonymous public landing page, a stylish visual treatment, animated scroll/slide motion, and dummy data. It does not specify purchase, checkout, accounts, inventory, or live commerce, none of which were requested.

2. System Overview

The product is a single-page, first-party, anonymously reachable web landing page. It is delivered as a custom UI owned by the application. There is no authentication, no account, no session continuity, and no protected destination: the page's only supported human goal is browsing a stylish t-shirt showcase and being drawn in by animated scrolling/slide motion.

Actors.

• Shopper (active human persona, required inference): scrolls through the animated t-shirt sections, views the dummy product data (names, images, prices, sizes, quoted descriptions), and reaches a confident impression of the brand's style.
• Application / page runtime (non-persona system actor): renders the page, drives the marquee, scroll-linked runway, scroll-triggered reveals, and ticker, and serves the bundled dummy product data.

Accepted behavior. A stylish landing page; animation on scroll or slide motion; dummy data throughout. These four accepted requirements are the complete current product commitment.

Ownership. All accepted human-facing behavior is owned by the single first-party page Landing. No provider surface, external destination, or headless delivery is involved. No system-only capability carries a persona-facing requirement.

Narrow exclusions. No purchase, cart, checkout, payment, order, account creation, login, wishlist, search, filtering, real inventory, or live commerce data is part of this product. Product data is dummy/placeholder data only, never real inventory or live commerce data.

2a. Product Interpretation and Delivery Boundary

The product is a public, anonymous, single-page marketing surface. A visitor arrives at the Landing page directly with no gate, no sign-in, and no prior state; everything the page shows is available immediately on load. Because the page holds no durable actor-specific state, no commitment, no entitlement, and no value transfer, no application-owned identity is established or required, and no protected destination exists. This is a deliberate boundary, not an omission: the accepted requirement is a stylish showcase with animated scrolling/slide motion over dummy data, and nothing in the accepted behavior needs a returning, identified visitor.

The current delivery boundary is therefore: one first-party custom page, rendered in the browser, with all product content bundled as dummy data. There is no backend commerce service, no provider-owned surface, and no external destination in the current scope. Anything resembling a storefront transaction — buying, paying, tracking an order, managing an account — sits outside this boundary and is not implemented here.

2b. Source Content Inventory

Not applicable. No reference directive in this project declares content_source authority, so no source content inventory is produced. All product content on the page is dummy/placeholder data as explicitly required.

2c. Page Content and Component Coverage

Landing

Purpose and access. The anonymous public entry surface and the only page in the product. Reachable directly with no authentication and no prior state; no protected state exists behind it.

Information and state.

• Brand headline composition: three stacked, all-caps display lines — line 1 “TSHIRTS” in off-white, line 2 FOR THE in off-white at reduced size, line 3 “NEXT DROP” in safety orange — with the words TSHIRTS and NEXT DROP wrapped in literal quotation marks in safety orange.
• Dummy product dataset: 6 t-shirts, each with a name, a price, a size run, a one-line quoted description, a front image, and a back-print image.
• Section sequence: (1) hero with oversized quoted headline and horizontal product marquee, (2) full-width RUNWAY slide section with scroll-linked horizontal motion, (3) product grid of 6 dummy tees with tag labels, (4) hazard-stripe divider band with a scrolling ticker of drop copy, (5) two-column spec sheet block (fabric, fit, care) styled as a garment care label, (6) footer with a marquee of the brand name.
• Persistent state: none beyond transient in-page interaction state (hover, scroll position, active slide indicator).

Primary actions.

• Scroll the page to advance through the animated sections.
• Hover a product card to swap the image to the back-print view and flip the tag label to orange.
• Hover the hero marquee to pause its drift.
• Scroll the RUNWAY section to translate its slides horizontally.
• Under prefers-reduced-motion, scroll the wrapped/scrollable product row horizontally to reach further items.

Supporting actions.

• Read tag labels for price, size run, and quoted description.
• Read the spec-sheet block for fabric, fit, and care.
• Read the ticker copy in the hazard-stripe band.

Domain entities.

• Tee (dummy product): name, price, sizeRun, quotedDescription, frontImage, backImage.
• Spec sheet entry: fabric, fit, care.
• Drop copy line: short ticker strings used in the hazard-stripe band and footer marquee.

Component responsibilities.

• Hero headline block: renders the three stacked quoted display lines, left-aligned on the exposed grid, never centred.
• Hero product marquee: a 96px-tall horizontal ticker of 6 sharp-cornered tee cards (each 260px wide, 1px off-white border) drifting left continuously; pauses on hover; becomes a wrapped, scrollable row under prefers-reduced-motion. Carries a small orange SCROLL tag pinned to the right edge.
• Runway section: full-width slide/section whose slides translate horizontally on scroll (scroll-linked, not autoplay), with an active slide indicator in safety orange.
• Product grid: 6 dummy tees with tag labels; scroll-triggered reveal slides each card up 24px with a 60ms stagger and no bounce.
• Tag-label component: small sharp-cornered rectangle with a punched hole and a thin zip-tie line holding price, size run, and quoted one-line description; flips to orange on hover.
• Hazard-stripe band: 16px repeating 45deg orange/black construction-tape stripe separating major sections, doubling as the top edge of the footer, and carrying a marquee of drop copy.
• Spec-sheet block: two-column garment-care-label-styled block for fabric, fit, and care.
• Footer: brand-name marquee above the hazard-stripe top edge.
• Exposed grid rules: thin off-white hairline rules marking the 12 columns and section boundaries, visible at all breakpoints.

States.

• Loading: the page is a static bundle; no network fetch is required for product data. If images are still decoding, each card frame holds its sharp-cornered 1px off-white border with the surface #151515 fill so layout does not shift.
• Empty: not reachable in normal operation because the dummy dataset is bundled and fixed at 6 tees. If the dataset were ever empty, the hero marquee, runway, and product grid render their section frames and hairline rules with the tag labels omitted, and the page remains readable rather than collapsing.
• Success: all six dummy tees render with names, prices, size runs, quoted descriptions, and front images; marquee drifts; runway translates on scroll; reveals stagger in; ticker scrolls.
• Error: if a product image fails to load, the card keeps its border and surface fill and shows the tee name and tag label so the item remains identifiable; the marquee and runway continue with the remaining cards.
• Recovery: a failed image is retried on the next page load; no user-facing retry control is required. Under prefers-reduced-motion, all continuous motion stops and the marquee content wraps into rows or a horizontally scrollable row so every item becomes fully readable.

3. Functional Requirements

Each requirement below is a distinct story point with provenance, lifecycle facts, and observable acceptance. Provenance labels: explicit (source-stated), basic_default (accepted default), required_inference (indispensable inferred mechanics).

FR-1 — Stylish t-shirt landing page (explicit) As a Shopper, I should land on a stylish t-shirt landing page so that I immediately get a confident impression of the brand's style.

• Trigger/input: navigating to the page URL.
• Observable result: a full-bleed black hero renders with the oversized quoted headline and the product marquee, using the specified palette, typography, and hard-edged industrial shape language.
• Access state: anonymous, no authentication, no prior state.
• Failure/recovery: if a font or image asset fails, the page still renders readable text and identifiable product cards; assets retry on next load.
• Continuation: the Shopper scrolls into the runway section.

FR-2 — Animated scrolling and slide motion (explicit) As a Shopper, I should experience animation on scroll and slide motion so that browsing the showcase feels energetic and drop-like rather than static.

• Trigger/input: page load and vertical scroll.
• Observable result: the hero marquee drifts left continuously; the RUNWAY section translates horizontally on scroll; product cards slide up 24px with a 60ms stagger on scroll-triggered reveal; the hazard-stripe band carries a scrolling ticker of drop copy; the footer carries a brand-name marquee.
• Access state: anonymous.
• Failure/recovery: under prefers-reduced-motion, all continuous motion stops and content wraps into rows or a horizontally scrollable row so every item becomes fully readable.
• Continuation: the Shopper continues scrolling to the next section.

FR-3 — Dummy product data (explicit) As a Shopper, I should see six dummy t-shirts with names, prices, size runs, and quoted descriptions so that the showcase looks populated and complete.

• Trigger/input: page load.
• Observable result: 6 tees render — QUOTED TEE 001, TAPE LOGO TEE, GRID PRINT TEE, HAZARD STRIPE TEE, BLANK CANVAS TEE, OFF-WHITE REFERENCE TEE — each with a price, a size run, and a one-line quoted description.
• Access state: anonymous.
• Failure/recovery: a card whose image fails keeps its border and surface fill and still shows its name and tag label.
• Continuation: the Shopper reads tag labels and continues scrolling.

FR-4 — Product card hover interaction (explicit) As a Shopper, I should hover a product card and see its back-print view and an orange tag label so that I can inspect the garment's detail.

• Trigger/input: pointer hover over a product card.
• Observable result: the card image swaps to the back-print view and the tag label flips to orange.
• Access state: anonymous.
• Failure/recovery: if no back-print image is available, the front image remains and the tag label still flips to orange.
• Continuation: the Shopper moves to the next card or scrolls on.

FR-5 — Hero marquee pause on hover (explicit) As a Shopper, I should be able to pause the hero marquee by hovering it so that I can read a specific card as it passes.

• Trigger/input: pointer hover over the hero marquee.
• Observable result: the marquee drift pauses; on pointer exit it resumes.
• Access state: anonymous.
• Failure/recovery: under prefers-reduced-motion the marquee does not drift at all and instead wraps or scrolls horizontally.
• Continuation: the Shopper resumes scrolling.

FR-6 — Spec sheet block (explicit) As a Shopper, I should read a garment-care-label-styled spec sheet so that I understand fabric, fit, and care.

• Trigger/input: scrolling to the spec-sheet section.
• Observable result: a two-column block renders fabric, fit, and care content styled as a garment care label.
• Access state: anonymous.
• Failure/recovery: if content is missing, the block renders its frame and hairline rules without collapsing the layout.
• Continuation: the Shopper scrolls to the footer.

FR-7 — Reduced-motion fallback (required_inference) As a Shopper who prefers reduced motion, I should see the same content without continuous animation so that the page remains readable and usable.

• Trigger/input: the operating system/browser prefers-reduced-motion setting.
• Observable result: the hero marquee stops and shows whole items wrapped into rows or in a horizontally scrollable row (overflow-x: auto); the runway and ticker stop; reveals appear without translation.
• Access state: anonymous.
• Failure/recovery: not applicable; this is itself the recovery path for motion.
• Continuation: the Shopper reads and scrolls normally.

FR-8 — Readable text and controls at every viewport (explicit) As a Shopper on any device, I should see headlines, labels, prices, and controls whole inside their container so that nothing readable is cropped or covered.

• Trigger/input: viewport widths of 375px, 768px, and 1280px.
• Observable result: headlines, wordmarks, labels, numbers, card text, and controls stay entirely inside the viewport and their container, wrapping or scaling (for example font-size: clamp(...) with its mobile size) to fit; no other element covers any part of them.
• Access state: anonymous.
• Failure/recovery: if a line would overflow, it wraps or scales down rather than clipping.
• Continuation: the Shopper continues browsing.

4. User Personas

Shopper

Product context. The Shopper is a young, style-literate visitor who arrives at the landing page directly, with no account and no prior relationship with the brand. They scroll fast, read labels and tags as content, and treat a t-shirt as a statement rather than a basic. They are evaluating the brand's point of view in seconds, not shopping a catalogue.

Primary goal. Browse a stylish t-shirt showcase and be drawn in by animated scrolling/slide motion, reaching a confident impression of the brand's style.

Distinct accepted responsibilities. The Shopper is the only active human actor, and their work is entirely perceptual and exploratory: scroll the page to advance through the animated sections, hover product cards to inspect back-print views and orange tag labels, pause the hero marquee to read a passing card, read tag labels for price, size run, and quoted description, read the spec sheet for fabric, fit, and care, and read the ticker copy. They make no commitment, no purchase, and no decision that changes durable state.

Relevant inputs or decisions. The Shopper's inputs are scroll position and pointer hover. Their only "decision" is whether the brand's style reads as credible — an impression, not a transaction. They supply no data and create no record.

Interactions with other accepted participants. There are no other accepted human participants. The Shopper interacts only with the page runtime, which drives the marquee, runway, reveals, and ticker and serves the bundled dummy data. No handoff, counterparty, or recipient exists in this product.

Observable success. The Shopper has seen all six dummy tees with their names, prices, size runs, and quoted descriptions; has experienced the scroll and slide motion (or its reduced-motion equivalent); and leaves with a clear sense of the brand's style. Nothing is cropped, covered, or unreadable at 375px, 768px, or 1280px.

What makes this role different. The Shopper's work is passive consumption of a designed surface, not operation of a system. There is no state to own, no record to resume, and no permission to hold — which is precisely why this product needs no identity, no account, and no protected destination.

5. Core User Flows

Flow 1 — Shopper arrives and takes in the hero

1. The Shopper navigates to the landing page URL. No sign-in, gate, or prior state is involved.
2. The Landing page renders a full-bleed black hero (#0B0B0B) with the three stacked quoted display lines left-aligned on the exposed 12-column grid: “TSHIRTS” in off-white, FOR THE in off-white at reduced size, “NEXT DROP” in safety orange.
3. Beneath the headline, the 96px-tall hero marquee drifts left continuously, showing sharp-cornered tee cards with 1px off-white borders, with a small orange SCROLL tag pinned to the right edge.
4. A 16px hazard-stripe band runs across the very bottom of the hero.
5. Observable result: the Shopper sees an oversized quoted headline over a moving runway of garments.
6. Continuation: the Shopper scrolls down.

Flow 2 — Shopper pauses the marquee to read a card

1. From the hero, the Shopper moves the pointer over the drifting marquee.
2. The marquee drift pauses.
3. The Shopper reads the card's name, price, size run, and quoted description from its tag label.
4. The Shopper moves the pointer away; the marquee resumes drifting.
5. Failure/recovery: if the Shopper has prefers-reduced-motion enabled, the marquee never drifts; instead the cards wrap into rows or sit in a horizontally scrollable row, and the Shopper scrolls that row to reach further items.
6. Continuation: the Shopper continues scrolling into the runway section.

Flow 3 — Shopper scrolls the runway

1. The Shopper scrolls into the full-width RUNWAY section.
2. The section's slides translate horizontally in a scroll-linked manner (not autoplay) as the Shopper scrolls.
3. The active slide indicator, in safety orange, marks the current slide.
4. Observable result: the Shopper moves through the runway slides under their own scroll control.
5. Failure/recovery: under prefers-reduced-motion, the runway does not translate; slides are presented without scroll-linked motion.
6. Continuation: the Shopper scrolls on to the product grid.

Flow 4 — Shopper browses the product grid and inspects a tee

1. The Shopper scrolls to the product grid of 6 dummy tees.
2. Each card slides up 24px with a 60ms stagger and no bounce as it enters the viewport.
3. The Shopper reads the tag labels: price, size run, and a one-line quoted description for each of QUOTED TEE 001, TAPE LOGO TEE, GRID PRINT TEE, HAZARD STRIPE TEE, BLANK CANVAS TEE, and OFF-WHITE REFERENCE TEE.
4. The Shopper hovers a card. The image swaps to the back-print view and the tag label flips to orange.
5. Observable result: the Shopper has inspected the garment's front and back detail and its label data.
6. Failure/recovery: if a card's image fails to load, the card keeps its border and surface fill and still shows the tee name and tag label, so the item remains identifiable.
7. Continuation: the Shopper scrolls to the hazard-stripe band.

Flow 5 — Shopper reads the ticker and spec sheet

1. The Shopper scrolls into the hazard-stripe divider band, where a ticker of drop copy scrolls continuously.
2. The Shopper reads the drop copy as it passes.
3. The Shopper scrolls into the two-column spec sheet block, styled like a garment care label, and reads fabric, fit, and care.
4. Observable result: the Shopper has the brand's drop messaging and the garment specification.
5. Failure/recovery: under prefers-reduced-motion, the ticker stops and its copy is shown whole.
6. Continuation: the Shopper scrolls to the footer.

Flow 6 — Shopper reaches the footer and completes the visit

1. The Shopper scrolls to the footer, whose top edge is the hazard-stripe band.
2. A marquee of the brand name runs in the footer.
3. Observable result: the Shopper has traversed the full page — hero, runway, product grid, ticker band, spec sheet, footer — and formed a confident impression of the brand's style.
4. Failure/recovery: under prefers-reduced-motion, the footer marquee stops and the brand name is shown whole.
5. Continuation: the Shopper may scroll back up to revisit any section; no state is lost because none is stored.

6. Visuals, Colors and Theme

The creative direction is authoritative for this section. Muse: Virgil Abloh. Headline: Remixed familiarity — streetwear labels, quotation marks and a moving runway for t-shirts.

Mode. Dark mode only.

Color tokens (exact hex by role).

All body text is #F5F2EC on #0B0B0B or #151515 for AA+ contrast.

Typography.

• Headings: Archivo Black, all-caps, tight tracking -0.02em, oversized display sizes with wide letterspacing on small label lines. Headline lines are stacked and each line is a separate block of colour or quotation.
• Body: Space Grotesk (400/500/700), with uppercase micro-labels at 0.18em tracking to read as garment tags.
• Scale: 1.5 modular display / 1.25 body.
  • Display: clamp(44px, 9vw, 128px) hero; clamp(32px, 5vw, 72px) section titles; clamp(22px, 3vw, 34px) product names.
  • Body: 18px desktop / 16px mobile, line-height 1.5.
  • Labels: 11px–13px uppercase, 0.18em tracking.

Shape language. Hard edges and industrial rectangles. Sharp corners everywhere (0 radius on cards, buttons, and image frames), 1px off-white hairline borders, exposed grid lines drawn as thin rules, and a repeating diagonal hazard stripe (orange/black, 45deg, 12px repeat) used as a 16px-tall band separating sections. Tag-shaped elements are small 0-radius rectangles with a punched hole and a thin zip-tie line, used as price and size labels. No soft shadows, no glass, no large radii.

Layout. 12-column exposed grid with visible column rules at 1280px, collapsing to 6 columns at 768px and a single column at 375px. Page order: (1) hero with the oversized quoted headline and a horizontal product marquee, (2) a full-width RUNWAY slide/section with scroll-linked horizontal motion, (3) product grid of 6 dummy tees with tag labels, (4) a hazard-stripe divider band with a scrolling ticker of drop copy, (5) a two-column spec sheet block (fabric, fit, care) styled like a garment care label, (6) footer with a marquee of the brand name. Every section is separated by a hairline rule, not by whitespace alone.

Imagery style. Product-on-concrete: each dummy tee photographed flat or on a mannequin against a raw grey concrete or black studio ground, with visible garment detail (stitching, tag, print). Overlaid with industrial textures — gaffer tape, zip ties, exposed grid lines, halftone grain. No stock people, no lifestyle photography; the garment is the subject.

Dummy data. 6 tees: QUOTED TEE 001, TAPE LOGO TEE, GRID PRINT TEE, HAZARD STRIPE TEE, BLANK CANVAS TEE, OFF-WHITE REFERENCE TEE — each with a price, a size run, and a one-line quoted description.

Avoid. Any blue or indigo primary/accent (#0057FF, #007BFF, #2563EB, #3B82F6, #4F46E5, #6366F1, #7C3AED); Inter, Roboto, Arial, Helvetica, Open Sans, Lato, Poppins, or system-ui for headings or body; gradient-blob heroes, glassmorphism panels, soft drop shadows, and large border radii; a grid of identical hover-lift cards; centred headline + subtext + button SaaS hero composition; lifestyle or stock-people photography; bouncy or elastic easing.

7. Signature Design Concept

The quoted runway. The public entry is a full-bleed black hero (#0B0B0B) whose headline is set as three stacked, all-caps Archivo Black lines that each span the viewport edge-to-edge, left-aligned on the exposed 12-column grid rather than centred:

• Line 1: “TSHIRTS” in off-white #F5F2EC
• Line 2: FOR THE in off-white #F5F2EC at 60% size
• Line 3: “NEXT DROP” in safety orange #FF5A00

The words TSHIRTS and NEXT DROP are wrapped in literal quotation marks in safety orange — the muse's language of quoted labels applied directly to the product name. Beneath the headline, a 96px-tall horizontal marquee of 6 product cards (each 260px wide, sharp-cornered, 1px off-white border) drifts left continuously, with a small orange SCROLL tag pinned to the right edge. A 16px hazard-stripe band runs across the very bottom of the hero.

There is no centred subtext, no blue button, and no gradient blob. The composition is an oversized quoted headline over a moving runway of garments — the tee is the hero, and the page reads as a tagged, industrial layout rather than a clean template. This concept recomposes only accepted content, states, and controls: the headline text, the six dummy tees, the marquee, the SCROLL tag, and the hazard-stripe band.

8. Interaction Model & Motion Direction

Interaction Model: Animated Motion Tempo: expressive Hero Dimensionality: flat

Landing Hero Motion Brief.

• Focal subject: the oversized quoted headline (“TSHIRTS” / FOR THE / “NEXT DROP”) sitting above the drifting runway of six sharp-cornered tee cards.
• Input → transformation → outcome thesis: on load, the marquee begins drifting left continuously; as the Shopper scrolls, the runway section translates horizontally and product cards slide up 24px with a 60ms stagger; hovering a card swaps its image to the back-print view and flips its tag label to orange, and hovering the marquee pauses its drift. The outcome is a page that reads as a live drop announcement rather than a static shopfront.
• Motion vocabulary: expressive, snappy, and label-like. Continuous marquee drift; scroll-linked horizontal runway translation (not autoplay); scroll-triggered reveals with 60ms stagger and no bounce; hazard-stripe ticker of drop copy; footer brand-name marquee. All transitions 120–220ms with cubic-bezier(0.2, 0.8, 0.2, 1). No bouncy or elastic easing, no overshoot.
• Composed first frame: full-bleed #0B0B0B; three stacked all-caps Archivo Black lines left-aligned on the exposed grid, with “TSHIRTS” and “NEXT DROP” in safety-orange quotation marks; the 96px marquee already in motion beneath; the orange SCROLL tag pinned right; the 16px hazard-stripe band across the bottom edge.
• Reduced-motion state: all continuous motion stops. The hero marquee shows whole items wrapped into rows or in a horizontally scrollable row (overflow-x: auto) whose further items are reached by scrolling; the runway and ticker stop; reveals appear without translation. Every item becomes fully readable.

No user-requested 3D/WebGL scene is present, and the direction's hero dimensionality is flat, so no Canvas/R3F/Drei hero is required.

9. Non-Functional Requirements

NFR-1 — Responsive integrity (explicit) Readable text and controls stay whole at every viewport. Headlines, wordmarks, labels, numbers, card text, and controls stay entirely inside the viewport and their container at 375px, 768px, and 1280px, wrapping or scaling (for example font-size: clamp(...) with its mobile size) to fit, and no other element covers any part of them. Imagery, decoration, and motion may be cropped, bled off an edge, rotated, overlapped, or cut exactly as the direction asks, as long as they cover no readable text or control. Rationale: the direction's oversized display type and full-bleed composition create real overflow risk at narrow widths.

NFR-2 — Moving content readability (explicit) Moving and scrollable content (marquees, tickers, carousels, horizontally scrollable rows) may cross the viewport or container edge by design and is judged by whether it actually moves or scrolls and whether every item becomes fully readable as it passes — never by the item cut at the edge in a still frame. Rationale: the product's core requirement is animated scrolling/slide motion, which inherently crosses edges.

NFR-3 — Reduced-motion accessibility (required_inference) Under prefers-reduced-motion, all continuous motion stops and shows whole items: they wrap into rows, or sit in a horizontally scrollable row (overflow-x: auto) whose further items are reached by scrolling. Rationale: the accepted motion requirement must remain usable for visitors who cannot tolerate continuous animation.

NFR-4 — Color contrast (explicit) All body text is #F5F2EC on #0B0B0B or #151515, meeting AA+ contrast. Rationale: the direction specifies this pairing as the readable baseline.

NFR-5 — Dummy data only (explicit) Product data must be dummy/placeholder data, not real inventory or live commerce data. Rationale: explicit hard constraint in the authoritative source.

NFR-6 — No backend dependency for content (required_inference) The page renders its six dummy tees from bundled data with no network fetch required, so the showcase is complete on first paint. Rationale: the accepted product is a static landing page with dummy data; a content fetch would introduce a failure mode the source never accepted.

10. Tech Stack

• React — the page is a custom UI surface; React provides the component model for the hero, marquee, runway, product grid, tag labels, spec sheet, and footer.
• CSS with clamp() and prefers-reduced-motion media queries — carries the responsive type scale, the exposed grid rules, the hazard-stripe band, and the reduced-motion fallback.
• Bundled dummy data module — the six tee records (name, price, sizeRun, quotedDescription, frontImage, backImage) and the spec-sheet and drop-copy strings, shipped with the page rather than fetched.

No backend service, database, container orchestration, or deployment platform is required by any accepted requirement. Python/FastAPI, Docker/docker-compose, and Kubernetes are not included because nothing in the accepted scope needs a server, persistence, or orchestration.

11. Assumptions and Constraints

Constraints (binding).

• Product data must be dummy/placeholder data, not real inventory or live commerce data. (explicit)
• The page must be stylish and must include animation on scroll or slide motion. (explicit)
• The palette is black, off-white, and safety orange only; no blue or indigo primary/accent. (explicit, creative direction)
• Headings use Archivo Black; body uses Space Grotesk; Inter, Roboto, Arial, Helvetica, Open Sans, Lato, Poppins, and system-ui are excluded for headings and body. (explicit, creative direction)
• No gradient-blob heroes, glassmorphism panels, soft drop shadows, or large border radii. (explicit, creative direction)
• No lifestyle or stock-people photography; the garment is the only subject. (explicit, creative direction)
• No bouncy or elastic easing; motion is snappy, 120–220ms, no overshoot. (explicit, creative direction)
• Readable text and controls stay whole at 375px, 768px, and 1280px. (explicit)

Assumptions (narrow, labeled).

• The six dummy tee names, prices, size runs, and quoted descriptions are placeholder content supplied by the direction and may be replaced with other dummy values without changing any requirement. (basic_default)
• Product imagery is placeholder studio imagery of garments on concrete or black ground; no real product photography is available. (basic_default)
• The page is served as a static bundle with no runtime content API. (required_inference)
• No analytics, tracking, or third-party embeds are included, since none were requested. (basic_default)

Explicit exclusions. No purchase, cart, checkout, payment, order, account creation, login, wishlist, search, filtering, real inventory, or live commerce data. No application-owned identity, session continuity, or protected destination. No RBAC or differentiated permissions, because no shared product state or differentiated control exists.

Future (not current). Any commerce capability — buying, paying, order tracking, or account management — is outside the current delivery horizon and is not implemented, specified, or reachable in this product.

12. Glossary

• Dummy data — placeholder product content (names, prices, size runs, quoted descriptions, images) used to populate the showcase; explicitly not real inventory or live commerce data.
• Hero — the full-bleed black opening section containing the oversized quoted headline, the product marquee, and the bottom hazard-stripe band.
• Marquee — a continuous horizontal ticker of content that drifts in one direction; pauses on hover and stops under prefers-reduced-motion.
• Runway — the full-width slide section whose slides translate horizontally in a scroll-linked manner, not on autoplay.
• Hazard-stripe band — a 16px repeating 45deg orange/black construction-tape stripe that separates major sections and doubles as the top edge of the footer.
• Tag label — a small sharp-cornered rectangle with a punched hole and a thin zip-tie line holding a tee's price, size run, and quoted one-line description; flips to orange on hover.
• Spec sheet — the two-column block styled as a garment care label, covering fabric, fit, and care.
• Exposed grid — thin off-white hairline rules marking the 12 columns and section boundaries, visible at all breakpoints.
• prefers-reduced-motion — the browser/OS setting under which all continuous motion stops and content is shown whole, wrapped or horizontally scrollable.
• Shopper — the single accepted active human persona: an anonymous visitor browsing the stylish t-shirt showcase.