MAGMA — a lava lamp instrument demo
MAGMA — a lava lamp instrument

A soft neumorphic interface that simulates a lava lamp, with glowing fluid blobs animated through CSS filters and keyframe animations.
Category: Glass & Soft UI
Era: 2020s Modern
Prompt: 11.1 KB · 1482 words
**SYSTEM PROMPT — CODING AI**

You are a Senior Frontend Engineer. Build a complete, production-quality landing page on the first attempt for **"MAGMA — a lava lamp instrument"**: a neumorphic, animated landing page for a fictional analog/digital hybrid lava lamp instrument, styled in the 2020s Digital aesthetic. Follow every rule below without deviation.

## 1. PROJECT BRIEF

**Product:** MAGMA — a lava lamp instrument (a playable lava lamp that turns heat and wax motion into ambient sound).
**Aesthetic:** Neumorphism (soft extruded/inset surfaces, dual box-shadows, large border radii) fused with lava-lamp warmth: gradients, blur, glow, and slow morphing micro-animations.
**Color Palette (source spec):** Primary tokens `#0e0a10`, `#d8c9d8`, `#3a2c34`; Secondary tokens `#241a20`, `#ff6a2e`, `#e8d8e8`.
**Sections required (in order):** Hero, Features (3 cards), How It Works (3 steps), Testimonials, Pricing (3 tiers), FAQ, Final CTA, Footer with secondary links.
**Theme default:** Light mode is the default presentation. **Exception clause:** despite the spec marking Dark mode unchecked, a complete, fully tokenized Dark Mode is mandatory (see 1.3) — the page must load in light mode but switch seamlessly to dark on toggle/system preference.

## 2. STRICT RULES & ARCHITECTURE

**2.1 CSS-First Architecture & Zero Inline CSS**
- All styling lives exclusively in `style.css`. **Never use `style="..."` attributes in HTML.**
- Target everything via class or ID selectors only.
- HTML must remain clean, semantic, and style-agnostic; re-theming must only require editing `style.css`.

**2.2 CSS Variables & Theme Tokens**
Define all tokens in `:root`, then override under `.dark`:
- **Colors:** `--primary`, `--secondary`, `--bg-primary`, `--bg-secondary`, `--text-primary`, `--text-secondary`, `--text-success`, `--text-error`, `--border-default`, `--border-error`, `--border-success`.
- **Required mapping (light mode):** `--bg-primary: #e8d8e8` (neumorphic base surface — never pure white; if a near-white is needed use `#fefefe`); `--bg-secondary: #d8c9d8` (raised/inset surfaces); `--text-primary: #0e0a10`; `--text-secondary: #3a2c34`; `--primary: #ff6a2e` (lava accent); `--secondary: #3a2c34`.
- **Dark mode mapping:** `--bg-primary: #0e0a10`; `--bg-secondary: #241a20`; `--text-primary: #e8d8e8`; `--text-secondary: #d8c9d8`; lava accent `#ff6a2e` retained with increased glow. **Enforce contrast pairing in both modes:** light backgrounds pair with dark text, dark backgrounds pair with light text.
- **Neumorphism tokens:** `--shadow-out` (extruded: one light shadow top-left, one dark shadow bottom-right, derived from the mode's bg/text tones), `--shadow-in` (inset pressed state), plus `--radius-sm`, `--radius-md`, `--radius-lg` (favor large radii, e.g., 24px+), `--shadow-sm`, `--shadow-md`, `--spacing-gap`, `--transition-fast`, `--transition-normal`, `--ease-standard`.
- **Elevation/stacking:** `--z-dropdown`, `--z-modal`, `--z-toast` must be defined even if only used for the toast/feedback layer.
- **Lava tokens:** `--lava-a: #ff6a2e`, `--lava-b: #d8c9d8` (or `#3a2c34` in dark) for gradient blends, `--glow: 0 0 40px rgba(255,106,46,0.35)` for the glow effect.

**2.3 Mandatory Dark Mode Support**
- Provide dark tokens under both `.dark` (class on `<html>`) and `@media (prefers-color-scheme: dark)` as the no-JS fallback.
- Theme switching swaps CSS variables only — no HTML restructuring.
- Persist the user's choice in `localStorage`; on first visit fall back to `prefers-color-scheme`.
- Include a visible theme toggle (a Google Material Symbols icon button: `dark_mode` / `light_mode`) with correct `aria-pressed` and `aria-label` states.

**2.4 Flexbox Layout & Mobile-First Alignment**
- Build every layout structure with Flexbox.
- Every flex container must default to `align-items: center` unless an exception is explicitly justified in a CSS comment.
- All layouts are mobile-first: feature/pricing/testimonial rows must wrap or collapse to a single column on small viewports. **No horizontal scrolling at any breakpoint.**

**2.5 Framework**
- Use Tailwind CSS (CDN or build) with custom CSS layered via `@layer`/`@apply`, OR clean custom CSS — choose one approach. All utilities must map back to the CSS variables and reusable semantic classes: `.btn`, `.btn-primary`, `.card`, `.input-group`, `.section`, `.container`.

**2.6 Typography & Icons (Google Fonts Mandatory)**
- Load Google Fonts via `<link>`: **Sora** or **Space Grotesk** for display headings, **Inter** for body. Bind them to `--font-display` and `--font-base`.
- Icons: Google Material Symbols (Rounded variant recommended). **Raw inline SVGs and local icon files are forbidden.**

## 3. SECTION & COMPONENT SPECIFICATIONS

**3.1 Global Components**

*Buttons (`.btn`):*
- **Default:** `display: flex; align-items: center; justify-content: center; gap: 0.5rem;` minimum 44×44px touch target. Primary variant uses the lava gradient with `--glow`; secondary variant is neumorphic extruded (`--shadow-out`) on `--bg-secondary`.
- **Hover:** brightness/glow shift with `cursor: pointer`.
- **Focus:** distinct visible focus ring via `outline`/`box-shadow` using `--primary` — perceivable in both light and dark modes.
- **Active/Pressed:** `transform: scale(0.97)` and/or neumorphic inset (`--shadow-in`).
- **Loading:** disables pointer events, prevents double-submits, shows a CSS spinner or pulsing Material Symbol without changing button dimensions.
- **Disabled:** `opacity: 0.5`, greyscale filter, `cursor: not-allowed`.
- **Success/Error:** temporary feedback states using `--text-success` / `--text-error` tokens.
- **Destructive styling:** define `.btn-danger` so it is visually distinct in both themes (applicable if any destructive action appears).

*Cards (`.card`):*
- **Default:** Flexbox layout, neumorphic extruded surface (`--bg-secondary`, `--shadow-out`, `--radius-lg`), subtle `--border-default`.
- **Hover:** lift via `transform: translateY(-2px)` with intensified glow/shadow.
- **Focus-within:** border highlight when a child link/button receives keyboard focus.
- **Skeleton:** define a shimmer keyframe animation class for loading states (layout-stable).
- **Empty state:** a structured fallback pattern with a Material Symbol and guidance text (define the pattern even if unused).

*Form & Input (`.input-group`):*
- **States:** empty, focused (outline ring), filled, valid (`--border-success` + check icon), invalid (`--border-error`, `--text-error`, error icon), disabled, read-only.
- **Structure:** flex column wrapping `<label>`, the input, and a dedicated error feedback container wired to an `aria-live="polite"` region.

*Modal/Popup:* Define the token/animation pattern (opening, open, loading, success/error, closing via CSS transitions; centered flex container, backdrop, Material Symbol close button, focus trap, `Esc` and overlay-click close). Only implement a modal if a section genuinely requires one — do not invent unrequested popups.

**3.2 Required Sections**

*Header/Nav:* Sticky neumorphic bar with the MAGMA wordmark, anchor links to each section, and the theme toggle. Mobile collapses links into a keyboard-accessible menu (button + `aria-expanded`); no horizontal overflow.

*Hero:* Two-part flex layout — left: headline, subheadline, dual CTAs (`.btn-primary` "Pre-order" + neumorphic `.btn` "Watch it flow"); right: a **pure-CSS animated lava lamp** built from layered divs using `border-radius` morph keyframes, `filter: blur()`, radial gradients blending `--lava-a`/`--lava-b`, and `--glow`. Slow (6–12s cycle) rising/sinking blob animations. All animation must freeze to a static gradient under `prefers-reduced-motion: reduce`.

*Features (3 cards):* e.g., "Heat-Reactive Sound Engine," "Hand-Blown Glass Chamber," "Analog-Digital Hybrid Controls." Neumorphic cards with one Material Symbol each, hover lift, and focus-within highlight. Grid/flex row on desktop, column on mobile.

*How It Works (3 steps):* Numbered vertical or horizontal stepper (01/02/03) — "Warm the wax," "Play the flow," "Shape the drone" — with a subtle connecting lava-gradient line and step-by-step micro-animations on hover.

*Testimonials:* 3 quote cards with neumorphic inset style (`--shadow-in`), avatar rendered as a styled initial (no external images unless using a permitted placeholder approach), 5-star rating via Material Symbols (`star`), and real, original quotes.

*Pricing (3 tiers):* e.g., "Ember," "MAGMA Classic" (highlighted middle tier with lava-gradient border/glow and a "Most Popular" badge), "Inferno Studio." Each tier: name, price, feature list with Material Symbol check marks, and a `.btn-primary` or `.btn` CTA. Equal-height flex cards; column stack on mobile.

*FAQ:* Accordion of at least 5 items. Implement with `<button aria-expanded>` + region pattern (or `<details>`/`<summary>`), CSS-only expand/collapse animation, chevron Material Symbol rotation, full keyboard operability, and visible focus states.

*Final CTA:* Full-width neumorphic panel with lava-glow gradient, headline, and an **email capture form** using `.input-group` — on submit: button enters loading state, then success (`--text-success` + check icon) or error (`--text-error` + message) feedback in an `aria-live="polite"` region. No page reload.

*Footer:* Multi-column flex layout (stacking on mobile) with the MAGMA logo, secondary link groups (Product, Company, Support, Social), copyright line, and a toast pattern (`--z-toast`, `aria-live`) if any link triggers feedback. All footer links must be real anchors or labeled hrefs — no dead `#` placeholders without labels.

## 4. CORE UX & MICRO-INTERACTION RULES

- **Responsive by default:** fluid `clamp()` typography, breakpoints without horizontal overflow.
- **Smooth animations:** every state change uses `transition: var(--transition-normal)`; all keyframe loops respect `prefers-reduced-motion: reduce`.
- **Accessibility:** sufficient contrast in BOTH modes (verify `#ff6a2e` on `#e8d8e8` and on `#0e0a10` — add a darker hover tone if contrast fails); never communicate state by color alone (pair icons/text with every color change); semantic HTML5 (`<header>`, `<main>`, `<section>`, `<nav>`, `<footer>`); logical DOM/focus order; full keyboard operability; `aria-live` for all dynamic feedback.
- **Mandatory visual feedback:** every click, hover, and submission triggers a visible state change.
- **Neumorphic a11y guard:** ensure neumorphic edges remain perceivable via subtle `--border-default` strokes so components are not distinguishable by shadow alone.

## 5. DELIVERABLES & OUTPUT FORMAT

- **Files:** `index.html`, `style.css`, `script.js` (theme toggle, FAQ accordion if not native `<details>`, form feedback simulation, mobile menu). Only a single deferred `<script src="script.js" defer>` reference in HTML — no inline script blocks.
- **Naming:** strict BEM (e.g., `.hero__lamp`, `.card__title`, `.pricing__tier--featured`) across the entire deliverable. Never mix conventions.
- **Copy:** Write all user-facing copy in **English**, original and product-specific (MAGMA lava lamp instrument context). **Lorem ipsum is forbidden.** Every heading, feature, testimonial, price, and FAQ answer must be authored, coherent content.
- **Icons:** Google Material Symbols only. No inline SVGs. No local icon files.
- No unrequested placeholders; complete on the first attempt.