{
  "id": "aurora-background",
  "kind": "element",
  "title": "Aurora background",
  "summary": "Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.",
  "url": "https://enrichr.dev/elements/aurora-background.html",
  "section": "background",
  "techniques": [
    "webgl",
    "pointer-interaction"
  ],
  "stack": [
    "Vanilla JS",
    "WebGL",
    "CSS"
  ],
  "frameworks": [
    "React",
    "Next.js",
    "Vanilla"
  ],
  "mood": [
    "calm",
    "soft",
    "immersive"
  ],
  "intents": [
    "aurora background",
    "northern lights hero",
    "animated gradient ribbons",
    "soft glowing background",
    "pointer reactive shader background"
  ],
  "status": "tested",
  "params": [
    {
      "key": "accent",
      "label": "Accent colour",
      "type": "color",
      "value": "#e6ff55"
    },
    {
      "key": "speed",
      "label": "Drift speed",
      "type": "range",
      "min": 0.1,
      "max": 2,
      "step": 0.05,
      "value": 0.6
    },
    {
      "key": "intensity",
      "label": "Glow intensity",
      "type": "range",
      "min": 0.3,
      "max": 1.5,
      "step": 0.05,
      "value": 1
    },
    {
      "key": "pull",
      "label": "Pointer pull",
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.05,
      "value": 0.6
    },
    {
      "key": "pieces",
      "label": "Puzzle pieces",
      "type": "select",
      "options": [
        [
          "on",
          "Show"
        ],
        [
          "off",
          "Hide"
        ]
      ],
      "value": "on"
    }
  ],
  "license": "Free to use in personal and client projects during the preview. Final licence terms will be published here before any paid tier starts; ask before reselling the code as a collection.",
  "contract": "function mount(root, opts) -> { update(partialOpts), destroy() }; root must contain the element markup",
  "exports": {
    "claude": "Add the \"Aurora background\" element to this project.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nSteps:\n1. Look at the project first to see its framework and where components, styles and static files live. Follow its conventions.\n2. Fetch https://enrichr.dev/elements/aurora-background.json if you can read URLs (fields: source.markup, source.css, source.js, params); otherwise use the source at the end of this message.\n3. Add the files, mount it where I tell you (default: the top of the home page), and pass the settings below as the opts.\n4. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n5. Run the dev server and check it. with reduced motion on, nothing moves; it works at 375px wide and with touch only; there are no console errors; scrolling stays smooth; destroy() is called when it unmounts.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}",
    "chatgpt": "I want the \"Aurora background\" element on my website. Below is its complete source. Please:\n1. Build one self-contained index.html that I can open locally to see it working (put the CSS in a <style> tag and the JavaScript in a <script> tag, with the markup in the body).\n2. Then explain, step by step, which parts go where in my own site, and how to mount it. My stack is: [tell me yours, or say \"plain HTML\"].\n3. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}\n\nVerify: with reduced motion on, nothing moves; it works at 375px wide and with touch only; there are no console errors; scrolling stays smooth; destroy() is called when it unmounts.",
    "cursor": "Add the \"Aurora background\" element to this codebase.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nUse Composer / agent mode. First search the repo for how components, styles and scripts are organised, then add the files in the matching places, mount it on the page I name, and run the app to confirm it works. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}\n\nVerify: with reduced motion on, nothing moves; it works at 375px wide and with touch only; there are no console errors; scrolling stays smooth; destroy() is called when it unmounts.\n\nOptional: save this as .cursor/rules/enrichr-aurora-background.mdc so the rule stays with the project:\n---\ndescription: How to use the Enrichr Aurora background element\nalwaysApply: false\n---\nmount(root, opts) expects the element markup inside root and returns { update, destroy }. Always call destroy() on unmount and never edit the ef- class names.",
    "v0": "Create a Next.js (App Router) client component for the \"Aurora background\" element. Tailwind is available but this component needs no utility classes.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nFiles to create:\n- aurora-background.js : the JavaScript below, with one line appended at the end: export { mount };  (and the markup exported as: export const markup = \"<the markup string>\";). If the project uses TypeScript and does not allow JS imports, put // @ts-nocheck on the first line.\n- the CSS below goes in your global stylesheet (or a plain .css file imported once at the app root). The class names are global and start with ef-.\n\nUse this component as the wrapper (adjust the import paths):\n```tsx\n\"use client\";\nimport { useEffect, useRef } from \"react\";\nimport { markup, mount } from \"./aurora-background\"; // markup is the HTML string; mount is the JavaScript's mount function\n\nexport default function AuroraBackground(props: Record<string, unknown>) {\n  const ref = useRef<HTMLDivElement>(null);\n  const fx = useRef<{ update: (o: object) => void; destroy: () => void } | null>(null);\n  useEffect(() => {\n    const root = ref.current;\n    if (!root) return;\n    root.innerHTML = markup;\n    fx.current = mount(root, props);\n    return () => { fx.current?.destroy(); fx.current = null; root.innerHTML = \"\"; };\n  }, []);\n  useEffect(() => { fx.current?.update(props); }, [JSON.stringify(props)]);\n  return <div ref={ref} />;\n}\n```\n\nRender it on the home page so I can see it. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}",
    "lovable": "Add the \"Aurora background\" element to this React + Vite + TypeScript + Tailwind project. Do not install any packages.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nFiles to create:\n- aurora-background.js : the JavaScript below, with one line appended at the end: export { mount };  (and the markup exported as: export const markup = \"<the markup string>\";). If the project uses TypeScript and does not allow JS imports, put // @ts-nocheck on the first line.\n- the CSS below goes in your global stylesheet (or a plain .css file imported once at the app root). The class names are global and start with ef-.\n\nWrapper component (src/components/AuroraBackground.tsx):\n```tsx\n\"use client\";\nimport { useEffect, useRef } from \"react\";\nimport { markup, mount } from \"./aurora-background\"; // markup is the HTML string; mount is the JavaScript's mount function\n\nexport default function AuroraBackground(props: Record<string, unknown>) {\n  const ref = useRef<HTMLDivElement>(null);\n  const fx = useRef<{ update: (o: object) => void; destroy: () => void } | null>(null);\n  useEffect(() => {\n    const root = ref.current;\n    if (!root) return;\n    root.innerHTML = markup;\n    fx.current = mount(root, props);\n    return () => { fx.current?.destroy(); fx.current = null; root.innerHTML = \"\"; };\n  }, []);\n  useEffect(() => { fx.current?.update(props); }, [JSON.stringify(props)]);\n  return <div ref={ref} />;\n}\n```\n\nRemove the \"use client\" line if it is not needed. Show it on the home page. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}",
    "bolt": "Create a small Vite project (vanilla JavaScript, no framework unless I already have one) that shows the \"Aurora background\" element.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nFiles: index.html (a container element, then a script tag), style.css (the CSS below), aurora-background.js (the JavaScript below) and main.js that sets the container's innerHTML to the markup and calls mount(container, opts) with the settings below. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}\n\nVerify: with reduced motion on, nothing moves; it works at 375px wide and with touch only; there are no console errors; scrolling stays smooth; destroy() is called when it unmounts.",
    "replit": "Create a new HTML, CSS and JavaScript Repl that shows the \"Aurora background\" element. No packages, no server code.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nFiles: index.html (a container element, link style.css, load aurora-background.js and then main.js), style.css (the CSS below), aurora-background.js (the JavaScript below), main.js (sets the container's innerHTML to the markup, then calls mount(container, opts) with the settings below). Press Run to preview. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}",
    "figma": "Designer handoff notes for the \"Aurora background\" element (Enrichr Library). Figma cannot run this JavaScript inside a design file, so use it as a motion reference and hand the code to a developer.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nWhat it does: One full-screen triangle is drawn with a fragment shader. Four ribbons each follow a sine curve bent by fractal value noise; a Gaussian across the ribbon gives a bright core, an exponential fall-off gives the hanging curtain, and a high-frequency noise term multiplies in the vertical rays. The pointer adds a smooth bump that pulls nearby ribbon centres toward it, eased over time in JavaScript. The canvas renders at about 60 percent of CSS pixels because the effect is soft anyway. Inline SVG puzzle pieces float above with a CSS keyframe drift.\nAccessibility: The background is decorative: the canvas and pieces are aria-hidden and take no focus. Put your own text on top and check contrast against the brightest ribbon. With prefers-reduced-motion the shader draws one still frame and the pieces stop floating. If WebGL is unavailable or the context is lost, a static CSS gradient in the same greens is shown.\n\nTunable settings:\n- Accent colour: color, default #e6ff55\n- Drift speed: range 0.1 to 2, step 0.05, default 0.6\n- Glow intensity: range 0.3 to 1.5, step 0.05, default 1\n- Pointer pull: range 0 to 1, step 0.05, default 0.6\n- Puzzle pieces: select (Show / Hide), default on\n\nCurrent settings:\n{{SETTINGS}}\n\nFor the developer: Element contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\nIn Figma:\n- Draw the resting state as a frame and the end state as a second frame; link them with Smart Animate to show the motion in a prototype.\n- Put the settings above in the frame's notes or Dev Mode annotations so the developer matches them.\n- Link https://enrichr.dev/elements/aurora-background.html in the handoff: the live demo and the copy-ready code are there. Developers can paste the prompts for Claude, Cursor or v0 from the Export menu.\nNothing is copied from another designer's file; this is original code from Enrichr.",
    "framer": "Add the \"Aurora background\" element to Framer as a code component. Framer code components are React, so wrap the vanilla code like this. Check it in the Framer editor, as Framer's component API can change.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\n1. In Framer: Assets > Code > New component. Name it AuroraBackground.\n2. Paste the JavaScript below into a separate code file named aurora-background.js in the same project, with  export { mount };  and  export const markup = \"<the markup string>\";  added. Put the CSS into the component as a <style> tag.\n3. Component:\n```tsx\nimport { addPropertyControls, ControlType } from \"framer\"\nimport { useEffect, useRef } from \"react\";\nimport { markup, mount } from \"./aurora-background\"; // markup is the HTML string; mount is the JavaScript's mount function\n\nexport default function AuroraBackground(props: any) {\n  const ref = useRef<HTMLDivElement>(null);\n  const fx = useRef<{ update: (o: object) => void; destroy: () => void } | null>(null);\n  useEffect(() => {\n    const root = ref.current;\n    if (!root) return;\n    root.innerHTML = markup;\n    fx.current = mount(root, props);\n    return () => { fx.current?.destroy(); fx.current = null; root.innerHTML = \"\"; };\n  }, []);\n  useEffect(() => { fx.current?.update(props); }, [JSON.stringify(props)]);\n  return <div ref={ref} />;\n}\n\naddPropertyControls(AuroraBackground, {\n  accent: { type: ControlType.Color, title: \"Accent colour\", defaultValue: \"#e6ff55\" },\n  speed: { type: ControlType.Number, title: \"Drift speed\", min: 0.1, max: 2, step: 0.05, defaultValue: 0.6 },\n  intensity: { type: ControlType.Number, title: \"Glow intensity\", min: 0.3, max: 1.5, step: 0.05, defaultValue: 1 },\n  pull: { type: ControlType.Number, title: \"Pointer pull\", min: 0, max: 1, step: 0.05, defaultValue: 0.6 },\n  pieces: { type: ControlType.Enum, title: \"Puzzle pieces\", options: [\"on\",\"off\"], optionTitles: [\"Show\",\"Hide\"], defaultValue: \"on\" },\n})\n```\n4. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}",
    "webflow": "Add the \"Aurora background\" element to a Webflow site with an Embed element. Test it on the published or preview site: scripts in embeds may not run inside the Designer canvas.\n\nThis is the \"Aurora background\" element from the Enrichr Library: Soft northern-lights ribbons drift across a dark sky in a small WebGL shader, bend toward the pointer, and float Enrichr puzzle pieces in the foreground.\nPage: https://enrichr.dev/elements/aurora-background.html\nMachine-readable spec: https://enrichr.dev/elements/aurora-background.json\n\nElement contract (vanilla JavaScript, no dependencies):\n- The JavaScript defines a function mount(root, opts).\n- root is an empty container element. Set root.innerHTML to the markup first, then call mount(root, opts).\n- It returns an object with update(partialOpts) and destroy(). Call destroy() when the element is removed. Some elements also return replay().\n- The CSS classes all start with \"ef-\" so they will not collide with your styles.\n\n1. Add an Embed element where it should appear. Paste a <style> block with the CSS, one container <div id=\"enrichr-aurora-background\"></div>, and a <script> block with the JavaScript followed by:\n   mount(document.getElementById(\"enrichr-aurora-background\"), { ...your settings... });\n   (set the container's innerHTML to the markup first, as in the contract).\n2. Embed elements have a size limit (check Webflow's current number). If the code is longer, host the JS and CSS as files and link them from Custom code in the page settings, then keep only the container and the mount call in the Embed.\n3. Keep the behaviour of the source unchanged. Do not add dependencies. Respect prefers-reduced-motion. Keep text as real HTML.\n\nSettings:\n{{SETTINGS}}\n\nSource:\n{{CODE}}"
  },
  "exportTools": [
    "claude",
    "chatgpt",
    "cursor",
    "v0",
    "lovable",
    "bolt",
    "replit",
    "figma",
    "framer",
    "webflow"
  ],
  "accessibility": "The background is decorative: the canvas and pieces are aria-hidden and take no focus. Put your own text on top and check contrast against the brightest ribbon. With prefers-reduced-motion the shader draws one still frame and the pieces stop floating. If WebGL is unavailable or the context is lost, a static CSS gradient in the same greens is shown.",
  "performance": "A single draw call per frame at reduced resolution, capped device pixel ratio, and no work while off-screen thanks to IntersectionObserver. Lower the drift speed or shrink the box on weak GPUs. The loop also stops entirely under reduced motion.",
  "dependencies": [],
  "source": {
    "markup": "<div class=\"ef-aur\">\n  <div class=\"ef-aur-fb\"></div>\n  <canvas class=\"ef-aur-cv\" aria-hidden=\"true\"></canvas>\n  <svg width=\"0\" height=\"0\" style=\"position:absolute\" aria-hidden=\"true\" focusable=\"false\"><defs><symbol id=\"ef-aur-pz1\" viewBox=\"1513.7 1453.9 322.3 322.3\">\r <path fill=\"currentColor\" d=\"M1821 1761.2h-292.3v-111.6c0-8 6.5-14.5 14.5-14.5 4.2 0 8.2 1.9 11 5.1 7.8 8.6 19.7 13.6 32.7 11.9 16.8-2.3 30.1-16 32-32.7 2.5-22.6-15.1-41.6-37.1-41.6-11 0-20.9 4.7-27.7 12.3-2.8 3.1-6.7 4.9-10.9 4.9-8 0-14.5-6.4-14.5-14.4v-111.7h292.3v111.7c0 8-6.4 14.4-14.5 14.4-4.2 0-8.1-1.8-10.9-5-7.9-8.6-19.7-13.6-32.7-11.9-16.8 2.2-30.1 15.9-32 32.7-2.5 22.6 15.1 41.6 37.1 41.6 11 0 20.8-4.8 27.7-12.3 2.8-3.1 6.7-5 10.8-5 8.1 0 14.5 6.5 14.5 14.5z\"/>\r </symbol>\r\r<symbol id=\"ef-aur-pz4\" viewBox=\"1423.36 860.8 503.07 322.3\">\r <path fill=\"currentColor\" d=\"M1821 875.8v111.6c0 8 6.5 14.5 14.5 14.5 4.2 0 8.1-1.9 10.9-5 6.8-7.5 16.7-12.3 27.7-12.3 22 0 39.6 19 37.1 41.6-1.9 16.7-15.2 30.5-32 32.7-13 1.7-24.8-3.3-32.7-11.9-2.8-3.2-6.8-5-11-5-8 0-14.5 6.4-14.5 14.4v111.7h-111.6c-8 0-14.5-6.5-14.5-14.5 0-4.2 1.9-8.2 5-11 8.7-7.9 13.7-19.7 12-32.7-2.3-16.8-16-30.1-32.8-32-22.5-2.5-41.5 15.1-41.5 37.1 0 11 4.7 20.9 12.3 27.7 3.1 2.8 4.9 6.7 4.9 10.8v0.1c0 8-6.4 14.5-14.5 14.5h-111.6v-111.7c0-8-6.4-14.4-14.5-14.4-4.1 0-8 1.8-10.8 4.9-6.9 7.6-16.7 12.3-27.7 12.3-22 0-39.6-19-37.1-41.6 1.9-16.7 15.2-30.4 32-32.7 13-1.7 24.8 3.3 32.7 11.9 2.8 3.2 6.7 5.1 10.9 5.1 8.1 0 14.5-6.5 14.5-14.5v-111.6z\"/>\r </symbol>\r\r<symbol id=\"ef-aur-pz8\" viewBox=\"1513.7 166.86 322.3 503.06\">\r <path fill=\"currentColor\" d=\"M1528.7 564.5v-111.6c0-8 6.5-14.5 14.5-14.5 4.2 0 8.2 1.9 11 5 7.8 8.7 19.7 13.7 32.7 11.9 16.8-2.2 30.1-15.9 32-32.7 2.5-22.5-15.1-41.5-37.1-41.5-11 0-20.9 4.7-27.7 12.3-2.8 3.1-6.7 4.9-10.9 4.9-8 0-14.5-6.5-14.5-14.5v-111.6h111.6c8.1 0 14.5-6.5 14.5-14.5 0-4.1-1.8-8.1-4.9-10.9-7.6-6.8-12.3-16.6-12.3-27.6 0-22 19-39.6 41.5-37.1 16.8 1.8 30.5 15.2 32.8 32 1.7 12.9-3.3 24.8-12 32.7-3.1 2.8-5 6.7-5 10.9 0 8 6.5 14.5 14.5 14.5h111.6v111.6c0 8-6.4 14.5-14.5 14.5-4.2 0-8.1-1.9-10.9-5-7.9-8.7-19.7-13.6-32.7-11.9-16.8 2.2-30.1 15.9-32 32.7-2.5 22.5 15.1 41.6 37.1 41.6 11 0 20.8-4.8 27.7-12.3 2.8-3.1 6.7-5 10.8-5 8.1 0 14.5 6.5 14.5 14.5v111.6h-111.6c-8 0-14.5 6.5-14.5 14.5 0 4.2 1.9 8.1 5 10.9 7.5 6.8 12.3 16.7 12.3 27.7 0 22-19 39.5-41.6 37.1-16.8-1.9-30.5-15.3-32.7-32-1.7-13 3.3-24.9 11.9-32.7 3.1-2.9 5-6.8 5-11 0-8-6.4-14.5-14.5-14.5z\"/>\r </symbol></defs></svg>\n  <svg class=\"ef-aur-pz ef-aur-pz--a\" aria-hidden=\"true\"><use href=\"#ef-aur-pz1\"/></svg>\n  <svg class=\"ef-aur-pz ef-aur-pz--b\" aria-hidden=\"true\"><use href=\"#ef-aur-pz4\"/></svg>\n  <svg class=\"ef-aur-pz ef-aur-pz--c\" aria-hidden=\"true\"><use href=\"#ef-aur-pz8\"/></svg>\n</div>",
    "css": "/* Enrichr Library · https://enrichr.dev */\n.ef-aur { position: relative; width: 100%; height: 100%; min-height: 18rem; overflow: hidden; background: #0c1e18; isolation: isolate; }\n.ef-aur-fb { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 40% at 30% 55%, rgba(230,255,85,0.35), transparent 70%), radial-gradient(ellipse 70% 45% at 70% 40%, rgba(47,125,91,0.7), transparent 70%), linear-gradient(180deg, #0c1e18, #005236 120%); }\n.ef-aur-cv { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity 600ms; }\n.ef-aur.is-gl .ef-aur-cv { opacity: 1; }\n.ef-aur.is-gl .ef-aur-fb { opacity: 0; }\n.ef-aur-pz { position: absolute; color: #fbf8f1; opacity: 0.16; pointer-events: none; will-change: transform; filter: drop-shadow(0 6px 18px rgba(0,0,0,0.35)); }\n.ef-aur-pz--a { aspect-ratio: 1; width: 22%; left: 8%; bottom: 10%; transform: rotate(-14deg); animation: ef-aur-fa 11s ease-in-out infinite; }\n.ef-aur-pz--b { aspect-ratio: 503 / 322; width: 34%; right: 6%; top: 12%; opacity: 0.12; color: #e6ff55; transform: rotate(9deg); animation: ef-aur-fb 14s ease-in-out infinite; }\n.ef-aur-pz--c { aspect-ratio: 322 / 503; width: 12%; left: 46%; bottom: 20%; opacity: 0.2; color: #c6f26b; transform: rotate(22deg); animation: ef-aur-fc 9s ease-in-out infinite; }\n@keyframes ef-aur-fa { 50% { transform: translateY(-14px) rotate(-8deg); } }\n@keyframes ef-aur-fb { 50% { transform: translateY(12px) rotate(14deg); } }\n@keyframes ef-aur-fc { 50% { transform: translateY(-10px) rotate(16deg); } }\n@media (prefers-reduced-motion: reduce) { .ef-aur-pz { animation: none; } }",
    "js": "// Enrichr Library · https://enrichr.dev\n// Aurora background: soft ribbons of light drift across a dark sky, drawn by a small WebGL fragment shader (layered noise curtains).\n// The pointer gently bends the ribbons toward it. Reduced motion draws one still frame. If WebGL is missing, a CSS gradient shows instead.\n// Original rebuild from the general idea of an aurora; palette is the Enrichr brand greens and lime only.\n// mount(root, { accent, speed (0.1-2), intensity (0.3-1.5), pull (0-1), pieces (\"on\"|\"off\") })\nfunction mount(root, o) {\n  var reduce = window.matchMedia(\"(prefers-reduced-motion: reduce)\").matches;\n  var box = root.querySelector(\".ef-aur\");\n  var cv = root.querySelector(\".ef-aur-cv\");\n  var pcs = root.querySelectorAll(\".ef-aur-pz\");\n  var opts = {}, gl = null, prog = null, U = {}, raf = 0, vis = true, io = null, ro = null;\n  var t0 = performance.now(), tAcc = 0, last = t0;\n  var mx = 0.5, my = 0.5, tx = 0.5, ty = 0.5, push = 0;\n  var offs = [];\n\n  var VS = \"attribute vec2 p;void main(){gl_Position=vec4(p,0.,1.);}\";\n  var FS = [\n    \"precision mediump float;\",\n    \"uniform vec2 R;uniform float T;uniform vec2 M;uniform float PU;uniform float IN;uniform vec3 A;\",\n    \"float h(vec2 p){p=fract(p*vec2(123.34,456.21));p+=dot(p,p+45.32);return fract(p.x*p.y);}\",\n    \"float n(vec2 p){vec2 i=floor(p),f=fract(p);f=f*f*(3.-2.*f);\",\n    \"return mix(mix(h(i),h(i+vec2(1,0)),f.x),mix(h(i+vec2(0,1)),h(i+vec2(1,1)),f.x),f.y);}\",\n    \"float fbm(vec2 p){float s=0.,a=.5;for(int i=0;i<4;i++){s+=a*n(p);p=p*2.03+vec2(7.1,3.7);a*=.5;}return s;}\",\n    \"vec3 ribbon(vec2 uv,float k,float base,float spd,vec3 col){\",\n    \"  float x=uv.x*1.6+k*3.1;\",\n    \"  float c=base+.16*sin(x*1.7+T*spd)+.22*(fbm(vec2(x*.9,T*spd*.35+k*5.))-.5);\",\n    \"  vec2 d=uv-M;float bump=exp(-dot(d,d)*6.)*PU;c+=bump*(M.y-c)*.5;\",\n    \"  float w=.07+.09*fbm(vec2(x*1.3+9.,T*.05*spd+k));\",\n    \"  float dy=uv.y-c;\",\n    \"  float core=exp(-dy*dy/(w*w));\",\n    \"  float hang=smoothstep(0.,.5,dy)*exp(-dy*3.2);\",\n    \"  float rays=.55+.45*fbm(vec2(uv.x*38.+k*11.,T*.08*spd));\",\n    \"  float body=(core*.9+hang*(.35+.4*step(0.,dy)))*rays;\",\n    \"  return col*body;\",\n    \"}\",\n    \"void main(){\",\n    \"  vec2 uv=gl_FragCoord.xy/R;uv.x*=R.x/R.y;vec2 m=M;\",\n    \"  vec3 ink=vec3(.047,.118,.094);\",\n    \"  vec3 g1=vec3(0.,.322,.212),g2=vec3(.039,.42,.275),g3=vec3(.184,.49,.357),lime=A;\",\n    \"  vec3 col=mix(ink,vec3(0.,.12,.08),uv.y*.0+.0);\",\n    \"  col+=ribbon(uv,0.,.52,1.0,g3)*1.0;\",\n    \"  col+=ribbon(uv,1.,.60,.8,g2)*1.15;\",\n    \"  col+=ribbon(uv,2.,.46,1.2,lime)*.7;\",\n    \"  col+=ribbon(uv,3.,.68,.6,g1)*1.2;\",\n    \"  col=ink+(col-ink)*IN;\",\n    \"  float st=step(.9965,h(floor(gl_FragCoord.xy/2.)));col+=st*vec3(.98,.97,.945)*.55*smoothstep(.3,.8,uv.y);\",\n    \"  col=min(col,vec3(.93,1.,.45));\",\n    \"  gl_FragColor=vec4(col,1.);\",\n    \"}\"\n  ].join(\"\\n\");\n  // note: uv.x is scaled by aspect, so M is passed in the same space from JS.\n\n  function sh(type, src) {\n    var s = gl.createShader(type);\n    gl.shaderSource(s, src); gl.compileShader(s);\n    if (!gl.getShaderParameter(s, gl.COMPILE_STATUS)) { gl.deleteShader(s); return null; }\n    return s;\n  }\n  function init() {\n    try { gl = cv.getContext(\"webgl\", { antialias: false, alpha: false, powerPreference: \"low-power\" }) || cv.getContext(\"experimental-webgl\"); } catch (e) { gl = null; }\n    if (!gl) return false;\n    var v = sh(gl.VERTEX_SHADER, VS), f = sh(gl.FRAGMENT_SHADER, FS);\n    if (!v || !f) { gl = null; return false; }\n    prog = gl.createProgram();\n    gl.attachShader(prog, v); gl.attachShader(prog, f); gl.linkProgram(prog);\n    if (!gl.getProgramParameter(prog, gl.LINK_STATUS)) { gl = null; return false; }\n    gl.useProgram(prog);\n    var b = gl.createBuffer();\n    gl.bindBuffer(gl.ARRAY_BUFFER, b);\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 3, -1, -1, 3]), gl.STATIC_DRAW);\n    var loc = gl.getAttribLocation(prog, \"p\");\n    gl.enableVertexAttribArray(loc);\n    gl.vertexAttribPointer(loc, 2, gl.FLOAT, false, 0, 0);\n    [\"R\", \"T\", \"M\", \"PU\", \"IN\", \"A\"].forEach(function (k) { U[k] = gl.getUniformLocation(prog, k); });\n    box.classList.add(\"is-gl\");\n    return true;\n  }\n  function hex(h) {\n    var m = /^#?([0-9a-f]{6})$/i.exec(h || \"\");\n    var n = parseInt(m ? m[1] : \"e6ff55\", 16);\n    return [(n >> 16) / 255, ((n >> 8) & 255) / 255, (n & 255) / 255];\n  }\n  function size() {\n    var r = box.getBoundingClientRect();\n    var d = Math.min(window.devicePixelRatio || 1, 1.5) * 0.6;\n    var w = Math.max(2, Math.round(r.width * d)), h = Math.max(2, Math.round(r.height * d));\n    if (cv.width !== w || cv.height !== h) { cv.width = w; cv.height = h; }\n    if (gl) gl.viewport(0, 0, w, h);\n  }\n  function draw() {\n    if (!gl) return;\n    var asp = cv.width / cv.height;\n    gl.uniform2f(U.R, cv.width, cv.height);\n    gl.uniform1f(U.T, tAcc);\n    gl.uniform2f(U.M, mx * asp, 1 - my);\n    gl.uniform1f(U.PU, push * opts.pull);\n    gl.uniform1f(U.IN, opts.intensity);\n    var c = hex(opts.accent);\n    gl.uniform3f(U.A, c[0], c[1], c[2]);\n    gl.drawArrays(gl.TRIANGLES, 0, 3);\n  }\n  function frame(now) {\n    raf = 0;\n    var dt = Math.min(0.05, (now - last) / 1000); last = now;\n    tAcc += dt * opts.speed;\n    mx += (tx - mx) * 0.06; my += (ty - my) * 0.06;\n    push += ((tx !== 0.5 || ty !== 0.5 ? 1 : 0) - push) * 0.04;\n    draw();\n    if (vis && !reduce) raf = requestAnimationFrame(frame);\n  }\n  function kick() {\n    if (reduce) { size(); tAcc = 6; draw(); return; }\n    if (!raf && vis) { last = performance.now(); raf = requestAnimationFrame(frame); }\n  }\n  function on(el, ev, fn) { el.addEventListener(ev, fn); offs.push(function () { el.removeEventListener(ev, fn); }); }\n\n  var ok = init();\n  on(cv, \"webglcontextlost\", function (e) { e.preventDefault(); if (raf) cancelAnimationFrame(raf); raf = 0; box.classList.remove(\"is-gl\"); });\n  on(cv, \"webglcontextrestored\", function () { if (init()) { size(); kick(); } });\n  on(box, \"pointermove\", function (e) {\n    var r = box.getBoundingClientRect();\n    tx = (e.clientX - r.left) / r.width; ty = (e.clientY - r.top) / r.height;\n  });\n  on(box, \"pointerleave\", function () { tx = 0.5; ty = 0.5; });\n  if (ok) {\n    if (\"ResizeObserver\" in window) { ro = new ResizeObserver(function () { size(); if (reduce) draw(); }); ro.observe(box); }\n    else on(window, \"resize\", function () { size(); });\n    if (\"IntersectionObserver\" in window) {\n      io = new IntersectionObserver(function (en) { vis = en[0].isIntersecting; if (vis) kick(); else if (raf) { cancelAnimationFrame(raf); raf = 0; } });\n      io.observe(box);\n    }\n    size();\n  }\n  function update(next) {\n    opts = Object.assign({ accent: \"#e6ff55\", speed: 0.6, intensity: 1, pull: 0.6, pieces: \"on\" }, opts, next || {});\n    for (var i = 0; i < pcs.length; i++) pcs[i].style.display = opts.pieces !== \"off\" && opts.pieces !== false ? \"\" : \"none\";\n    box.style.setProperty(\"--ef-acc\", opts.accent);\n    if (ok) kick();\n  }\n  function destroy() {\n    if (raf) cancelAnimationFrame(raf); raf = 0; vis = false;\n    if (io) io.disconnect(); if (ro) ro.disconnect();\n    offs.forEach(function (f) { f(); }); offs = [];\n    gl = null;\n  }\n  update(o);\n  return { update: update, destroy: destroy };\n}"
  }
}