GPT 6 Astra for Computer Use

Create a complete, single-file interactive HTML webpage titled “Midnight Letterpress Accident Laboratory.” Output only the finished HTML document, with all CSS and JavaScript inline. It must open and work directly in a modern browser with no external dependencies, CDNs, libraries, fonts, image links, SVG files, or other assets. This is a responsive webpage, not a fixed 16:9 image or canvas composition; it must adapt gracefully to desktop, tablet, and mobile screens. Build a tactile experimental letterpress simulator in which the user composes a print by dragging individual lead type blocks onto a central sheet, rotating and repositioning them, then tuning ink amount, press pressure, and paper humidity before pulling a huge mechanical impression lever. The printed result must procedurally respond to those parameters: excess ink causes bleeding and clogged counters, low ink creates dry broken edges, pressure changes indentation and deformation, humidity increases feathering and paper-fiber damage, imperfect type placement creates misregistration, and repeated impressions produce offset shadows and ghost images. Allow multiple color passes using only vermilion red, ultramarine blue, and acid yellow, with realistic overprint blending, visible layer ordering, per-layer visibility, step-by-step undo/redo, and the ability to lift the paper corner to reveal the evolving print beneath. Freeze the main visual drama around the instant when the press roller has just risen and the finished print is about to be revealed. The central paper must feel like a theatrical stage. Arrange type blocks, ink rollers, tweezers, registration pins, scraps, gauges, and controls in an asymmetric ring around it. Use an off-white bone-paper and lead-gray foundation, illuminated by a warm-white work lamp shining diagonally from the upper left. Render everything through CSS, HTML elements, Canvas, and procedural textures in a rough physical screen-print and handmade collage style: torn edges, fibrous paper grain, uneven pigment, halftone flecks, scratched metal, ink smears, tape fragments, slight perspective, imperfect registration, and layered shadows. Avoid glossy gradients, sterile SaaS styling, generic cards, neon cyberpunk colors, photorealistic imagery, emoji, stock illustrations, and perfectly clean vector geometry. Include a substantial movable type inventory with letters, punctuation, numerals, and several decorative blocks. Users must be able to drag blocks from the inventory onto the composing area, select multiple blocks, rotate them with handles or keyboard shortcuts, nudge them with arrow keys, delete or duplicate them, and edit textual content without losing the physical block appearance. Add snapping guides that can be toggled, but preserve small manual irregularities. Provide clear hover, active, selected, disabled, and focus states. Support pointer and touch interaction, sensible keyboard controls, accessible labels, and visible focus indicators. Create three tactile controls for ink amount, pressure, and humidity whose values update the paper preview, texture simulation, gauges, warning labels, and ambient machine behavior in real time. The system should reveal playful accident states at extreme combinations, such as violent ink blooms, doubled letters, slipped type, ragged fiber cracks, roller chatter, and splattered registration marks, while still keeping the composition legible. Add a compact experiment log that records each impression and its parameters. Users must be able to select a pass color, press the lever by dragging it through a convincing arc, watch a short but detailed press cycle, and then peel back the paper. The animation should include lever resistance, machine vibration, roller movement, paper compression, dust motes, slight lamp flicker, and a suspenseful pause before reveal. Respect prefers-reduced-motion. Make undo and redo genuinely functional across placement, rotation, parameter changes, printing, color passes, and reveal actions. Include Reset, Random Accident, Re-ink, Add Pass, Undo, and Redo controls, plus a concise onboarding hint that disappears after interaction. Seed the page with an intriguing partially composed poster so the first view is visually rich, but let every important element remain editable. Add subtle sound-like visual feedback without using audio assets. Ensure deterministic procedural texture where practical so undo restores the same appearance. The experience should feel ceremonial, handmade, tense, and mischievously uncontrollable rather than merely decorative. Prioritize polished interaction details, convincing parameter coupling, layered procedural printing artifacts, refined animation timing, and excellent responsive composition. Use semantic HTML and clean, well-structured vanilla JavaScript. The final response must contain only the complete executable HTML document.

Create a complete, polished, single-file interactive HTML webpage titled “Midnight Ramen Soundscape Theater.” Output only the final HTML document with all CSS and JavaScript inline. It must run directly in a modern browser with no build step and no external dependencies, libraries, fonts, images, audio files, CDN resources, network requests, or linked assets. Build an expressive interactive scene set inside a surreal midnight ramen shop. The central object is one continuous bundle of elastic noodles rendered with Canvas, SVG, or a carefully integrated combination of both. The noodle bundle should travel diagonally across the foreground and feel physically tangible: users can grab it anywhere with the mouse or touch, drag it, stretch it, whip it, fold it over itself, and release it. Implement convincing spring physics with inertia, damping, gravity, multiple connected segments, collision response, and visible secondary motion. Keep the simulation stable even during aggressive dragging, rapid direction changes, viewport resizing, or repeated interactions. Arrange at least three distinct ramen bowls and several ingredients along a sweeping arc through the composition, creating a strong visual rhythm around the diagonal noodle. Each bowl should have its own illustrated broth pattern, color identity, label, and sound character. When the noodle touches or falls into a bowl, trigger a synchronized audiovisual response: a unique percussive beat synthesized with the Web Audio API, a rising steam burst, scallion-green particle sprays, broth ripples, small droplets, screen-print registration jitter, and animated handwritten Japanese-style onomatopoeia such as “ZURU!”, “PON!”, “JUU!”, or “BASHAN!” created from styled text rather than external fonts. Collision intensity must affect volume, pitch, particle count, ripple size, lettering scale, and animation force. Audio must begin only after the user’s first interaction and include a clear mute/unmute control. The climactic visual state should evoke a freeze-frame in which the noodle is stretched dramatically through the air while broth is suspended just before splashing. Support this with a “FREEZE THE SPLASH” control and the Space key: entering freeze mode should apply a brief punchy transition, suspend the physical scene without losing its state, emphasize airborne droplets and stretched noodle tension, display bold poster-like kinetic typography, and preserve subtle procedural line shimmer so the page still feels alive. Pressing Space or the control again should resume seamlessly. Add a reset control, a compact sound status indicator, and a restrained live “tempo/impact” readout driven by recent collisions. Keyboard controls must be discoverable in a small integrated help panel: Space toggles freeze, R resets, M mutes, and arrow keys apply directional impulses to the noodle. Use a visually sophisticated hybrid of vintage silkscreen poster design and procedural line animation. A deep indigo background should dominate, cut by localized stove-fire warmth around bowls and collision points. Use layered spot colors—vermilion red, ginger yellow, scallion green, warm cream, and near-black—with halftone textures, rough ink edges, slight color misregistration, bold graphic shadows, and animated contour lines. The result should feel handmade and theatrical rather than glossy or photorealistic. Include subtle ambient steam, flickering stove glow, drifting grain, and moving linework, but preserve strong contrast and readable controls. Avoid generic neon cyberpunk styling. Make the composition responsive across wide desktop, tablet, and mobile screens; this is a webpage, so do not force a fixed 16:9 aspect ratio. Adapt bowl placement, typography, controls, simulation bounds, and touch targets fluidly without cropping essential content. Use pointer events for unified mouse, pen, and touch handling. Prevent page scrolling only while the noodle is actively being manipulated. Respect prefers-reduced-motion by reducing ambient animation while keeping the core interaction functional. Maintain smooth performance through efficient particle pooling or strict particle limits, requestAnimationFrame, device-pixel-ratio-aware rendering with a sensible resolution cap, and resize-safe coordinate handling. Content and finish requirements: include an atmospheric title treatment, a short one-line invitation to interact, three or more labeled bowls, multiple visually distinct toppings, contextual handwritten sound words, polished control states, clear focus styles, accessible button labels, and an unobtrusive interaction hint that fades after first use. The opening scene should already look like a finished collectible poster before any interaction, while the active state should become a lively rhythmic toy with layered feedback and surprising emergent motion. Negative constraints: no external assets or dependencies; no image URLs; no prerecorded audio; no frameworks; no unfinished placeholders; no TODO comments; no broken controls; no fixed 16:9 canvas; no plain default UI; no generic gradient-only background; no emoji used as primary artwork; no excessive explanatory text; no autoplay audio; no uncontrolled particle growth; no fragile physics that explodes or produces NaN values; no interaction that works only with a mouse; and no output outside the single complete HTML document.