System Requirements Document for chatgpt-6-astra

1. Introduction

chatgpt-6-astra is a single, self-contained HTML file delivered as the product itself. The user (Cristian Cruz) asked for "algo que me sorprenda" — something that surprises — and then confirmed the delivery shape: one HTML file that can be opened directly in a browser. There is no product category, no data model, no forms, and no backend. The entire product is an experience: an immersive, architectural, motion-led web page whose hero is the product.

The audience is a single anonymous visitor who opens the file in a browser and expects to be surprised. Success is simple and total: the file opens, works, and delivers wonder. The intent is closer to an art installation or a cultural-venue landing than to a SaaS page — the page must not be mistakable for a template.

2. System Overview

The current delivery is one self-contained HTML file. It runs entirely in the browser with no server, no build step required to view it, and no external data. All styling, markup, and motion live inside the single file so it can be opened by double-clicking or dragging into a browser.

Actors

• Visitante / Cristian — the single active human persona. Opens the file, experiences the page, scrolls through its sections, and leaves having been surprised.
• Browser (system actor) — renders the file, executes its CSS/JS motion, and honors prefers-reduced-motion.

Accepted behavior

• Deliver a self-contained HTML file as the product.
• The content must surprise the visitor; no functions, audience, or theme were specified beyond that.
• The visitor opens the file in a browser and experiences it.

Ownership and boundaries

• The experience is owned by the single first-party page, Landing, which is the public anonymous entry surface. Access requirement is none — no account, no identity, no session.
• There is no backend, no API, no persistence, and no external service. Nothing is stored or transmitted.
• Excluded: any account system, any data collection, any multi-page navigation, any server-side behavior, any product category (shop, dashboard, SaaS) not requested by the user.

2a. Product Interpretation and Delivery Boundary

The user's request is deliberately open-ended: make something surprising, delivered as an HTML file. The correct interpretation is therefore not to invent a product domain, but to treat the page itself as the deliverable experience. Everything the visitor sees is the product.

Current horizon: one self-contained HTML file, one page, anonymous access, no identity, no persistence, no network calls.

Future horizon: none stated by the user. Any expansion (additional pages, interactivity beyond the experience, data) is out of scope for this generation and must not be built.

Access ownership: the Landing page is public and anonymous. No login, signup, invitation, or provisioning exists or is needed, because no durable actor-specific state, commitment, or value transfer is created.

2b. Source Content Inventory

Not applicable — no reference directive in this project declares content_source. No inventory is included.

2c. Page Content and Component Coverage

Landing

The single page of the product. A full-bleed, dark, immersive experience that opens directly in the browser and delivers the surprise through an architectural, motion-led composition.

Information and state

• No data is loaded, fetched, or stored. The page is fully static in content and fully dynamic in motion.
• State is purely presentational: scroll position drives parallax and section reveals; hover drives waypoint expansion; prefers-reduced-motion switches the page to a static arrangement.

Primary actions

• Open the file in a browser (the only required action).
• Scroll through the page to move between the hero and the three editorial sections.
• Hover or activate a waypoint in the left rail to jump to its section.

Supporting actions

• Horizontal scroll (or drag/swipe) through the five-moment gallery.
• Reduced-motion users scroll the gallery row horizontally to bring each moment fully into view.

Domain entities

• None. There is no domain model, no records, no users, no transactions.

Component responsibilities

• Wordmark inscription — ASTRA set top-left as a 13px uppercase letterspaced inscription in gold (#C8A96B). It is an inscription, not a logo lockup.
• Hero void — a 100vh dark field (#0B0D10) that dominates the viewport.

• Parametric ribbon of light — the hero subject: a sweeping form entering bottom-left and exiting top-right, built from three stacked bezier strokes in ice-cyan (#7FD6E8) fading to transparent, with a soft radial glow (#7FD6E8 at 12% opacity) behind its midpoint. Oversized, bleeding off both viewport edges. Drifts continuously on a 24-second loop with scroll-linked rotation of up to 8 degrees over the first 100vh, and opacity breathing between 0.6 and 1.0.
• Topographic line pattern — a faint 1px pattern at 6% opacity behind the hero, giving the void a sense of architectural scale.
• Floating caption panel — glass-like surface (#16191E at 88% opacity) with a 1px gold (#C8A96B) border and asymmetric radii (48px on one corner, 4px on the opposite), anchored in the lower-left quadrant. Contains a wide-tracked micro-label A SELF-CONTAINED EXPERIENCE in muted grey (#8A9099) and one line of pearl-white type Something that surprises you. at 40px Josefin Sans Light.
• Left waypoint rail — a fixed thin vertical rail on the left edge with five small circular waypoints, each carrying a rotated 90° micro-caption. Hovering a waypoint expands a 1px cyan line across the viewport edge; activating it scroll-jumps to its section.
• Section 1 — editorial split — a two-column layout on a curved diagonal baseline: a tall pearl-white type stack on the left, and on the right a slow parallax of the same ribbon frozen at a different angle.
• Section 2 — moments gallery — a horizontal scroll gallery of five full-bleed dark frames, each carrying a single luminous curve at a different angle and a numbered index in gold (01–05). Scrolls past the viewport edge by design; wraps into a static row under prefers-reduced-motion.
• Section 3 — closing statement — a full-viewport statement with the wordmark ASTRA set at clamp(56px, 10vw, 128px) in Josefin Sans Thin with +0.24em tracking, centered over a faint radial glow, acting as a typographic monument rather than a footer.
• Gold hairline rules — occasional measurement marks used as architectural accents.

States

• Loading — none. The file renders immediately; no async content exists.
• Empty — not applicable; the page has no collections that can be empty.
• Success — the page renders, the ribbon animates, sections reveal on scroll, waypoints respond, and the closing statement resolves.
• Error — the only material failure is the file not opening or rendering in the browser. Recovery is to open the file in a current browser; no in-page error state is required because there is no runtime dependency that can fail.
• Recovery — for reduced-motion users, the ribbon becomes a static SVG curve, all reveals appear without transition, and the moments gallery becomes a horizontally scrollable static row so every moment can be brought fully into view.

3. Functional Requirements

FR-1 — Deliver a self-contained HTML file As the Visitante / Cristian, I should receive a single self-contained HTML file as the product, so that I can open it directly in a browser and experience it without any setup.

• Provenance: explicit
• Trigger/input: the file is delivered.
• Observable result: one HTML file containing all markup, styles, and motion; it opens and renders with no external dependencies required to view it.
• Access state: none — no account, no server.
• Failure/recovery: if the file does not open, the visitor opens it in a current browser.
• Continuation: the visitor experiences the page.

FR-2 — Surprise the visitor As the Visitante / Cristian, I should be surprised by what the page does, so that the experience feels like something made for me rather than a template.

• Provenance: explicit
• Trigger/input: the visitor opens the file and begins to scroll.
• Observable result: an immersive, architectural, motion-led composition — a full-bleed dark hero dominated by a sweeping parametric ribbon of light, a floating caption panel, a left waypoint rail, three asymmetric editorial sections, and a closing typographic monument — that does not read as a generic SaaS page.
• Access state: none.
• Failure/recovery: if motion is reduced, the page still delivers the surprise through composition, scale, and typography rather than animation.
• Continuation: the visitor scrolls through the sections and reaches the closing statement.

FR-3 — Open the file in a browser As the Visitante / Cristian, I should be able to open the HTML file in a browser, so that the experience begins.

• Provenance: required_inference
• Trigger/input: the visitor opens the file (double-click, drag into a browser, or open via file path).
• Observable result: the Landing page renders full-viewport with the hero void, ribbon, caption panel, and waypoint rail visible.
• Access state: anonymous, no identity required.
• Failure/recovery: if the browser is outdated, the visitor uses a current browser; the page degrades gracefully to static composition under reduced motion.
• Continuation: the visitor scrolls into the editorial sections.

FR-4 — Navigate the sections via the waypoint rail As the Visitante / Cristian, I should be able to move between the page's sections using the left rail, so that I can explore the experience at my own pace.

• Provenance: required_inference
• Trigger/input: hovering or activating one of the five circular waypoints in the fixed left rail.
• Observable result: hovering expands a 1px cyan line across the viewport edge; activating scroll-jumps to the corresponding section.
• Access state: none.
• Failure/recovery: if motion is reduced, waypoints still scroll-jump without the expanding line animation.
• Continuation: the visitor arrives at the chosen section and continues scrolling.

FR-5 — Browse the five moments As the Visitante / Cristian, I should be able to move through the five moments in the gallery, so that I can see each luminous curve and its numbered index.

• Provenance: required_inference
• Trigger/input: horizontal scroll, drag, or swipe across the moments gallery.
• Observable result: each of the five full-bleed dark frames passes through the viewport, each carrying a single luminous curve at a different angle and a gold index (01–05), and each becomes fully readable as it passes.
• Access state: none.
• Failure/recovery: under prefers-reduced-motion, the gallery becomes a static horizontally scrollable row so every moment can be brought fully into view.
• Continuation: the visitor reaches the closing statement.

FR-6 — Reach the closing statement As the Visitante / Cristian, I should arrive at a closing full-viewport statement, so that the experience resolves as a typographic monument.

• Provenance: required_inference
• Trigger/input: scrolling to the end of the page.
• Observable result: the wordmark ASTRA appears at clamp(56px, 10vw, 128px) in Josefin Sans Thin with +0.24em tracking, centered over a faint radial glow.
• Access state: none.
• Failure/recovery: under reduced motion, the statement appears without transition.
• Continuation: the experience ends; the visitor may scroll back or close the file.

4. User Personas

Visitante / Cristian

Product context. Cristian is the person who asked for something surprising and specified only the delivery shape: an HTML file. He is not shopping, not managing data, and not signing in. He opens a file on his own machine and expects the page itself to be the event.

Primary goal. To open the file and be genuinely surprised — to see something that feels crafted and unexpected rather than a template with his name on it.

Distinct accepted responsibilities.

• Open the HTML file in a browser.
• Experience the hero: the dark void, the sweeping ribbon of light, the floating caption panel, and the wordmark inscription.
• Scroll through the three editorial sections.
• Use the left waypoint rail to move between sections.
• Browse the five moments in the horizontal gallery.
• Reach the closing ASTRA statement.

Relevant inputs or decisions.

• Which browser to open the file in.
• Whether to scroll linearly or jump via the waypoint rail.
• Whether to browse the gallery by scrolling, dragging, or swiping.
• Whether his system requests reduced motion, in which case the page presents a static arrangement.

Interactions with other accepted participants. None. There is no other human participant, no counterparty, no recipient, and no external service. The only other actor is the browser, which renders and animates the page.

Observable success. The file opens, the ribbon drifts, the sections reveal, the waypoints respond, the five moments are each fully readable as they pass, and the closing statement resolves. Cristian closes the file having been surprised.

Constraints carried from source. The deliverable is an HTML file; no other technologies, audiences, or functions were specified. No account, no data, no backend.

5. Core User Flows

Flow 1 — Open the file and meet the hero

1. Cristian receives the self-contained HTML file.
2. He opens it in a browser (double-click, drag into the window, or open via file path).
3. The Landing page renders full-viewport: a 100vh dark void (#0B0D10) with the topographic line pattern faintly behind it.
4. The parametric ribbon of light sweeps from the bottom-left corner to the top-right, bleeding off both edges, built from three stacked ice-cyan bezier strokes fading to transparent, with a soft radial glow behind its midpoint.
5. The ribbon drifts continuously on its 24-second loop, its opacity breathing between 0.6 and 1.0.
6. The floating caption panel sits anchored in the lower-left quadrant — glass-like surface, 1px gold border, asymmetric radii — carrying the micro-label A SELF-CONTAINED EXPERIENCE and the line Something that surprises you.
7. The wordmark ASTRA sits top-left as a 13px uppercase letterspaced gold inscription.
8. The left waypoint rail is visible with five circular nodes and their rotated micro-captions.
9. Result: Cristian is looking at an architectural void whose subject is the ribbon itself — no centered headline, no subtext stack, no button.
10. Continuation: he scrolls, and the ribbon rotates up to 8 degrees over the first 100vh as parallax.

Flow 2 — Scroll into the editorial sections

1. From the hero, Cristian scrolls down.
2. Section 1 appears as a crossfade with a 1.2s cubic-bezier(0.16, 1, 0.3, 1) easing: a two-column split on a curved diagonal baseline.
3. The left column carries a tall pearl-white type stack; the right column carries a slow parallax of the same ribbon, frozen at a different angle.
4. Cristian continues scrolling.
5. Section 2 appears: the horizontal scroll gallery of five moments.
6. Result: the page reads as a continuous architectural composition rather than a stack of blocks.
7. Continuation: he moves into the gallery.

Flow 3 — Browse the five moments

1. In Section 2, Cristian scrolls horizontally (or drags/swipes) across the gallery.
2. Each of the five full-bleed dark frames passes through the viewport, carrying a single luminous curve at a different angle and a gold numbered index (01–05).
3. Each moment becomes fully readable as it passes; the row scrolls past the viewport edge by design.
4. Result: Cristian has seen all five moments.
5. Failure/recovery: if his system requests reduced motion, the gallery becomes a static row he can scroll horizontally to bring each moment fully into view.
6. Continuation: he scrolls on to the closing statement.

Flow 4 — Navigate by waypoint rail

1. At any point, Cristian hovers a circular waypoint in the fixed left rail.
2. A 1px cyan line expands across the viewport edge.
3. He activates the waypoint.
4. The page scroll-jumps to that section.
5. Result: he lands directly in the chosen section.
6. Failure/recovery: under reduced motion, the jump still works without the expanding line animation.
7. Continuation: he continues from that section.

Flow 5 — Reach the closing statement

1. Cristian scrolls to the end of the page.
2. Section 3 appears as a full-viewport statement.
3. The wordmark ASTRA resolves at clamp(56px, 10vw, 128px) in Josefin Sans Thin with +0.24em tracking, centered over a faint radial glow.
4. Result: the experience closes as a typographic monument rather than a footer.
5. Failure/recovery: under reduced motion, the statement appears without transition.
6. Continuation: the experience ends; Cristian may scroll back or close the file.

6. Visuals, Colors and Theme

Muse: Zaha Hadid. Headline direction: Fluid parametric grandeur for a self-contained surprise.

The direction is authoritative for this section. It translates into the following concrete tokens.

Palette (dark mode)

Typography

• Headings: Josefin Sans — Light (300) at large scale, generous tracking (+0.04em), mixed case; occasional uppercase micro-labels at +0.24em tracking. The wordmark ASTRA is set in Josefin Sans Thin (100) at display scale, letterspaced like an architectural inscription.
• Body: Jost.
• Scale: 1.333 modular — 128 / 96 / 64 / 40 / 24 / 16 / 13. Mobile hero headline clamps to 56px, desktop to 128px. Body copy 17px / 1.65; micro-labels 12px uppercase with wide tracking.

Shape language

• Sweeping parametric curves as the organizing geometry; section boundaries are gentle arcs that slice the layout diagonally.
• The hero subject is a continuous flowing form — a ribbon of light curving through the viewport.
• Cards and panels use asymmetric rounded corners (one corner 48px, the opposite 4px) so nothing reads as a default rounded box.
• Buttons are pill-shaped but elongated, like architectural wayfinding.
• Thin 1px luminous strokes trace the edges of the parametric form.

Layout

• Full-bleed immersive hero at 100vh: dark void, a single flowing parametric ribbon sweeping bottom-left to top-right, a floating caption panel anchored lower-left.
• Below the hero, three asymmetric editorial sections on a curved diagonal baseline: (1) two-column split with a tall pearl-white type stack and a slow parallax of the ribbon frozen at a different angle; (2) a horizontal scroll gallery of five moments, each a full-bleed dark frame with a single luminous curve and a gold numbered index; (3) a closing full-viewport statement with ASTRA at 128px, letterspaced, centered over a faint radial glow.
• Navigation is a fixed thin vertical rail on the left edge with five small circular waypoints that scroll to each section, each labelled with a rotated micro-caption.

Imagery

• No photography. The imagery is the parametric form itself: a single crafted SVG/CSS ribbon of light built from stacked bezier paths with a cyan-to-transparent gradient stroke, plus a soft radial glow behind it.
• A faint topographic line pattern (1px, 6% opacity) sits behind the hero to give the void a sense of scale, like an architectural blueprint.
• Occasional gold hairline rules act as measurement marks.

Avoid

• Centered headline + subtext + CTA button stacked in the middle of the hero.
• Any blue–indigo primary (#0057FF, #2563EB, #4F46E5, #6366F1, #7C3AED and neighbours) on a white ground.
• Inter, Roboto, Arial, Helvetica, Open Sans, Lato, Poppins, or system-ui for headings or body.
• Gradient-blob heroes or a grid of identical hover-lift cards.
• Bright saturated multi-colour palettes; keep the void dark and the accents rare (gold + one cyan).
• Photography of people, stock imagery, or clip art.
• Bouncy or springy motion; Hadid's motion is slow, architectural, continuous.
• Straight-edged section boundaries or uniform border-radius boxes.

Readability rule (takes precedence). Headlines, wordmarks, labels, numbers, and 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 as the direction asks, as long as they cover no readable text or control. The moments gallery may cross the viewport edge by design because it actually scrolls and every item becomes fully readable as it passes.

7. Signature Design Concept

The ribbon is the hero. The public entry is a 100vh dark void (#0B0D10) whose single dominant element is a sweeping parametric ribbon of light entering from the bottom-left corner and exiting at the top-right. It is built from three stacked bezier strokes in ice-cyan (#7FD6E8) fading to transparent, with a soft radial glow (#7FD6E8 at 12% opacity) behind its midpoint. The ribbon is oversized — it spans the full viewport diagonally and bleeds off both edges.

A floating caption panel (surface #16191E at 88% opacity, 1px #C8A96B border, asymmetric radii 48px/4px) sits anchored in the lower-left quadrant, containing the wide-tracked micro-label A SELF-CONTAINED EXPERIENCE in muted grey and a single line of pearl-white type Something that surprises you. at 40px Josefin Sans Light.

The wordmark ASTRA sits top-left as a 13px uppercase letterspaced inscription in gold — not a logo lockup. A thin vertical waypoint rail runs down the left edge. There is no centered headline, no subtext stack, and no button: the ribbon and the caption panel are the entire first impression.

This concept recomposes only accepted content, states, and controls. It introduces no new behavior, page, or destination.

8. Interaction Model & Motion Direction

Interaction Model: Animated Motion Tempo: cinematic Hero Dimensionality: webgl

Landing Hero Motion Brief

• Focal subject: the parametric ribbon of light — a continuous flowing form built from three stacked ice-cyan bezier strokes fading to transparent, with a soft radial glow behind its midpoint, sweeping diagonally across the full 100vh hero and bleeding off both viewport edges.
• Input → transformation → outcome thesis: as the visitor opens the page, the ribbon drifts continuously on a 24-second loop; as the visitor scrolls the first 100vh, the ribbon rotates up to 8 degrees and its opacity breathes between 0.6 and 1.0 — so the void itself responds to the visitor's presence and movement, and the page reads as a spatial experience rather than a document.
• Motion vocabulary: cinematic and slow. Continuous drift, scroll-linked parallax, crossfade section entrances with a 1.2s cubic-bezier(0.16, 1, 0.3, 1) easing, opacity breathing, and a 1px cyan line expanding across the viewport edge on waypoint hover. No bouncy or springy motion.
• Composed first frame: a dark void (#0B0D10) with the faint topographic line pattern behind it; the ribbon already mid-sweep from bottom-left to top-right; the floating caption panel anchored lower-left with its micro-label and single line of pearl-white type; the ASTRA inscription top-left in gold; the five-node waypoint rail down the left edge.
• Reduced-motion state: the ribbon becomes a static SVG curve, all reveals appear without transition, and the moments gallery becomes a static horizontally scrollable row so every moment can be brought fully into view.

Landing Hero 3D Scene Brief — DIRECTION-DERIVED

The direction specifies webgl hero dimensionality, so a real-time WebGL hero subject is expected. One crafted object: a single continuous parametric ribbon rendered as a flowing surface of light, built from stacked bezier paths with a cyan-to-transparent gradient, drifting on a 24-second loop and rotating up to 8 degrees with scroll over the first 100vh. A soft radial glow sits behind its midpoint. The scene shows the product's defining state — a luminous architectural form occupying a dark void — and nothing else. Under prefers-reduced-motion, the scene is replaced by a static SVG curve of the same form.

9. Non-Functional Requirements

NFR-1 — Self-contained delivery The product is one HTML file. All markup, styles, and motion live inside it. Provenance: explicit. Rationale: the user asked for an HTML file and specified no other technologies.

NFR-2 — No backend, no persistence, no network dependency The page requires no server, no API, no database, and no external service to function. Nothing is stored or transmitted. Provenance: explicit constraint ("no se especificaron otras tecnologías, audiencias ni funciones") plus required_inference from the delivery shape. Rationale: a self-contained file opened directly in a browser has no runtime dependency that can fail.

NFR-3 — Anonymous access The Landing page requires no account, identity, or session. Provenance: required_inference. Rationale: no durable actor-specific state, commitment, entitlement, or value transfer is created, so no identity continuity is needed.

NFR-4 — Reduced-motion support Under prefers-reduced-motion, the ribbon becomes a static SVG curve, all reveals appear without transition, and the moments gallery becomes a static horizontally scrollable row. Provenance: explicit (creative direction). Rationale: the experience must remain usable and complete without motion.

NFR-5 — Readable text and controls stay whole Headlines, wordmarks, labels, numbers, and card text and controls stay entirely inside the viewport and their container at 375px, 768px, and 1280px, wrapping or scaling to fit, with no other element covering them. Provenance: explicit (creative direction). Rationale: accessibility and legibility take precedence over decorative cropping.

NFR-6 — Performance of the hero The hero motion runs continuously without degrading the experience; the ribbon drifts on a 24-second loop and responds to scroll. Provenance: required_inference. Rationale: the hero is the product, so its motion must remain smooth.

10. Tech Stack

• Single self-contained HTML file — the deliverable. Contains all markup, CSS, and JavaScript inline. Provenance: explicit.
• CSS — for layout, the parametric ribbon (stacked bezier strokes with gradient), the topographic line pattern, asymmetric radii, typography, and reduced-motion handling. Provenance: explicit (creative direction).
• JavaScript / WebGL — for the real-time hero subject and scroll-linked parallax, as required by the direction's webgl hero dimensionality. Provenance: explicit (creative direction).
• Fonts — Josefin Sans (headings, wordmark) and Jost (body), as specified by the direction. Provenance: explicit (creative direction).

No backend, framework, build system, container, or deployment infrastructure is required or included. The file is opened directly in a browser.

11. Assumptions and Constraints

Assumptions

• The visitor has a current browser capable of rendering CSS gradients, SVG, and WebGL. [Assumption — not specified by user]
• The visitor opens the file locally; no hosting is required. [Assumption — not specified by user]
• The page is viewed on viewports of at least 375px width. [Assumption — not specified by user]

Constraints

• The deliverable is an HTML file; no other technologies, audiences, or functions were specified. (Explicit)
• The content must surprise the visitor; no functions, audience, or theme were specified beyond that. (Explicit)
• No account system, data collection, multi-page navigation, server-side behavior, or product category is in scope. (Explicit by omission and by the delivery shape)
• The creative direction's palette, typography, shape language, layout, motion, and imagery are authoritative for the visual and interaction design. (Explicit)
• The generic indigo/blue-on-white SaaS template is forbidden for this project. (Explicit)

Future requirements

• None stated by the user. Any expansion beyond the single self-contained HTML file is out of scope for this generation.

12. Glossary

• ASTRA — the wordmark of the experience, set as an architectural inscription rather than a logo lockup.
• Parametric ribbon — the hero subject: a continuous flowing form of light built from stacked bezier strokes with a cyan-to-transparent gradient, sweeping diagonally across the viewport.
• Void — the dark background field (#0B0D10) that dominates the viewport.
• Waypoint rail — the fixed thin vertical rail on the left edge with five circular nodes that scroll-jump to each section.
• Moments — the five full-bleed dark frames in the horizontal gallery, each carrying a single luminous curve and a gold numbered index (01–05).
• Reduced motion — the prefers-reduced-motion browser setting, under which the page presents a static arrangement.
• Self-contained — the property of the HTML file that all markup, styles, and motion live inside it, with no external dependency required to view it.