# Lighthouse 404 > A lighthouse sweeps the fog at night and its beam uncovers a giant 404 in the sky; with the pointer you steer the light. - Category: [404](https://library.aimran.es/components/404) - Built with: HTML + CSS - Live editor: https://library.aimran.es/blocks/404-lighthouse - Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham ## Where to use it A full screen night scene for travel, sailing or harbor sites: a red and white lighthouse on the rocks, drifting fog, rolling waves and a huge outlined 404 in the sky. The beam sweeps back and forth on its own, and wherever it points the number lights up warm yellow through a soft mask. Move the pointer and the beam follows it for a few seconds before going back to its sweep. The scene is decorative and hidden from screen readers, and reduced motion leaves the light fixed on the number. Adjust the yellow accent. ## Code ### HTML ```html 404 · Page not found

Heading 404

This page never reached port.

The lighthouse is searching for it in the fog, but it isn't on the chart. Head back to the harbor mouth and pick another course.

Back to port

``` ### CSS ```css .n4-lighthouse { --accent: #ffd56b; --k: 1; position: fixed; inset: 0; z-index: 0; overflow: hidden; container-type: size; display: grid; place-items: center; background: #000; color: #f5f5f7; font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",system-ui,sans-serif; -webkit-font-smoothing: antialiased; text-align: center; line-height: 1.4; } .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { box-sizing: border-box; } .n4-lighthouse .n4-copy { position: relative; z-index: 5; display: flex; flex-direction: column; align-items: center; gap: 1.6cqmin; width: 100%; max-width: 680px; padding: 0 6cqw; } .n4-lighthouse .n4-title { margin: 0; font-size: clamp(17px,4.2cqmin,36px); font-weight: 600; letter-spacing: -.02em; line-height: 1.15; text-wrap: balance; } .n4-lighthouse .n4-sub { margin: 0; max-width: 34em; font-size: clamp(13px,2.4cqmin,18px); color: #a1a1a6; text-wrap: balance; } .n4-lighthouse .n4-tag { font: 600 clamp(10px,1.9cqmin,13px)/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); } .n4-lighthouse .n4-cta { margin-top: 1.8cqmin; display: inline-flex; align-items: center; gap: .5em; padding: .85em 1.5em; border-radius: 999px; background: #f5f5f7; color: #000; font-size: clamp(13px,2.2cqmin,16px); font-weight: 600; text-decoration: none; transition: transform .3s cubic-bezier(.25,.1,.25,1),box-shadow .3s cubic-bezier(.25,.1,.25,1); } .n4-lighthouse .n4-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -10px var(--accent); } .n4-lighthouse .n4-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; } .n4-lighthouse .n4-stars,.n4-lighthouse .n4-stars2 { position: absolute; inset: -4%; pointer-events: none; } .n4-lighthouse .n4-stars { background-image: radial-gradient(1px 1px at 8% 12%,#fff 60%,transparent),radial-gradient(1px 1px at 22% 68%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 35% 24%,#fff 60%,transparent),radial-gradient(1px 1px at 48% 82%,#fff 60%,transparent),radial-gradient(1px 1px at 57% 9%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 66% 44%,#fff 60%,transparent),radial-gradient(1px 1px at 74% 72%,#fff 60%,transparent),radial-gradient(1px 1px at 86% 18%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 93% 58%,#fff 60%,transparent),radial-gradient(1px 1px at 14% 42%,#fff 60%,transparent),radial-gradient(1px 1px at 40% 55%,#fff 60%,transparent),radial-gradient(1px 1px at 81% 90%,#fff 60%,transparent),radial-gradient(1px 1px at 4% 88%,#fff 60%,transparent),radial-gradient(1px 1px at 62% 30%,#fff 60%,transparent); opacity: .75; animation: n4-lighthouse-tw calc(5s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-stars2 { background-image: radial-gradient(2px 2px at 18% 30%,rgba(255,255,255,.9) 50%,transparent),radial-gradient(1.5px 1.5px at 72% 20%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 30% 85%,rgba(255,255,255,.7) 50%,transparent),radial-gradient(1.5px 1.5px at 88% 70%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 52% 60%,rgba(255,255,255,.6) 50%,transparent),radial-gradient(1.5px 1.5px at 6% 55%,rgba(255,255,255,.8) 50%,transparent); opacity: .55; animation: n4-lighthouse-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse; } .n4-lighthouse [data-depth] { transition: transform .9s cubic-bezier(.2,.7,.2,1); } @keyframes n4-lighthouse-tw { from { opacity: .3; } } @keyframes n4-lighthouse-spin { to { transform: rotate(1turn); } } @keyframes n4-lighthouse-fade { from { opacity: 0; transform: translateY(10px); } } @media (prefers-reduced-motion:reduce) { .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { animation: none!important; transition: none!important; } } .n4-lighthouse { background: linear-gradient(#071720,#0f2f3d 46%,#16404f 56%,#06161d 56.2%,#020a0e); color: #eaf4f7; } .n4-lighthouse .n4-sky { position: absolute; inset: 0; overflow: hidden; } .n4-lighthouse .n4-big { position: absolute; left: 0; right: 0; top: 6%; margin: 0; display: grid; justify-content: center; font: 800 28cqmin/1 "Helvetica Neue",Helvetica,Arial,system-ui,sans-serif; letter-spacing: -.06em; } .n4-lighthouse .n4-big span { grid-area: 1/1; } .n4-lighthouse .n4-dim { color: transparent; -webkit-text-stroke: 1px rgba(234,244,247,.16); } .n4-lighthouse .n4-lit { color: #fff3c9; text-shadow: 0 0 3cqmin rgba(255,213,107,.6); -webkit-mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); } .n4-lighthouse .n4-fog { position: absolute; left: -30%; right: -30%; top: 16%; height: 40%; background: radial-gradient(35% 45% at 30% 50%,rgba(160,195,205,.18),transparent 70%),radial-gradient(30% 40% at 72% 40%,rgba(160,195,205,.13),transparent 70%); filter: blur(2cqmin); animation: n4-lighthouse-drift calc(26s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-f2 { top: 34%; opacity: .8; animation-duration: calc(34s / var(--k)); animation-direction: alternate-reverse; } .n4-lighthouse .n4-beam { position: absolute; left: var(--lx,82%); top: var(--ly,30%); width: 160cqmax; height: 34cqmin; margin-top: -17cqmin; transform-origin: 0 50%; rotate: var(--a,200deg); clip-path: polygon(0 48.5%,100% 0,100% 100%,0 51.5%); background: linear-gradient(90deg,rgba(255,230,160,.5),rgba(255,230,160,.12) 45%,transparent 80%); mix-blend-mode: screen; pointer-events: none; } .n4-lighthouse .n4-rock { position: absolute; right: 3%; bottom: 43%; width: 28cqmin; height: 6cqmin; border-radius: 50% 50% 0 0/100% 100% 0 0; background: #08171d; } .n4-lighthouse .n4-tower { position: absolute; right: 11%; bottom: 44%; width: 6.5cqmin; height: 26cqmin; } .n4-lighthouse .n4-body { position: absolute; inset: 0; clip-path: polygon(24% 0,76% 0,100% 100%,0 100%); background: linear-gradient(90deg,rgba(0,0,0,.4),transparent 45%,rgba(0,0,0,.3)),repeating-linear-gradient(#e9e4da 0 4.4cqmin,#b3261e 4.4cqmin 8.8cqmin); } .n4-lighthouse .n4-gal { position: absolute; left: -6%; right: -6%; top: -.8cqmin; height: 1cqmin; border-radius: .3cqmin; background: #1d2428; } .n4-lighthouse .n4-lamp { position: absolute; left: 16%; right: 16%; bottom: calc(100% + .4cqmin); height: 4cqmin; border-radius: .4cqmin; background: radial-gradient(circle,#fff8d6 0 30%,#ffd56b 55%,rgba(255,213,107,.35)); box-shadow: 0 0 4cqmin 1cqmin rgba(255,213,107,.5); } .n4-lighthouse .n4-lamp::before { content: ""; position: absolute; left: -22%; right: -22%; bottom: 100%; height: 2.6cqmin; clip-path: polygon(50% 0,100% 100%,0 100%); background: #1d2428; } .n4-lighthouse .n4-sea { position: absolute; left: 0; bottom: 41.5%; width: 200%; height: 5cqmin; animation: n4-lighthouse-waves calc(10s / var(--k)) linear infinite; } .n4-lighthouse .n4-sea path { fill: #06161d; } .n4-lighthouse .n4-copy { position: absolute; left: 0; right: 0; bottom: 5cqh; margin: 0 auto; } .n4-lighthouse .n4-tag { color: var(--accent); } .n4-lighthouse .n4-title { font-size: clamp(20px,4.8cqmin,40px); font-weight: 700; letter-spacing: -.025em; } .n4-lighthouse .n4-sub { color: #9fb6bf; } .n4-lighthouse .n4-cta { background: var(--accent); color: #1b1503; } @keyframes n4-lighthouse-drift { to { transform: translateX(12%); } } @keyframes n4-lighthouse-waves { to { transform: translateX(-50%); } } ``` ### JavaScript ```js document.querySelectorAll(".n4-lighthouse").forEach((el) => { const sky = el.querySelector(".n4-sky"); const lamp = el.querySelector(".n4-lamp"); const lit = el.querySelector(".n4-lit"); const rm = matchMedia("(prefers-reduced-motion: reduce)").matches; const k = parseFloat(getComputedStyle(el).getPropertyValue("--k")) || 1; let px = 0, py = 0, until = 0, raf = 0, sx = -1, sy = 0; const t0 = performance.now(); const frame = (t) => { const r = el.getBoundingClientRect(), l = lamp.getBoundingClientRect(), b = lit.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; const lx = (l.left + l.width / 2 - r.left) / s, ly = (l.top + l.height / 2 - r.top) / s; const bx = (b.left - r.left) / s, by = (b.top - r.top) / s, bw = b.width / s, bh = b.height / s; let tx = px, ty = py; if (t > until) { tx = bx + bw * (0.5 + 0.6 * Math.sin(((t - t0) / 1000) * 0.7 * k)); ty = by + bh * 0.55; } if (sx < 0 || rm) { sx = tx; sy = ty; } sx += (tx - sx) * 0.08; sy += (ty - sy) * 0.08; sky.style.setProperty("--lx", lx.toFixed(1) + "px"); sky.style.setProperty("--ly", ly.toFixed(1) + "px"); sky.style.setProperty("--a", ((Math.atan2(sy - ly, sx - lx) * 180) / Math.PI).toFixed(2) + "deg"); lit.style.setProperty("--mx", (sx - bx).toFixed(1) + "px"); lit.style.setProperty("--my", (sy - by).toFixed(1) + "px"); if (!rm) raf = requestAnimationFrame(frame); }; const move = (e) => { const r = el.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; px = (e.clientX - r.left) / s; py = (e.clientY - r.top) / s; until = performance.now() + 2500; if (rm) frame(performance.now()); }; el.addEventListener("pointermove", move); raf = requestAnimationFrame(frame); }); ``` ### React ```tsx // @ts-nocheck: setup() es JavaScript del DOM sin tipos. import { useEffect, useRef } from "react"; const css = ` .n4-lighthouse { --accent: #ffd56b; --k: 1; position: fixed; inset: 0; z-index: 0; overflow: hidden; container-type: size; display: grid; place-items: center; background: #000; color: #f5f5f7; font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",system-ui,sans-serif; -webkit-font-smoothing: antialiased; text-align: center; line-height: 1.4; } .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { box-sizing: border-box; } .n4-lighthouse .n4-copy { position: relative; z-index: 5; display: flex; flex-direction: column; align-items: center; gap: 1.6cqmin; width: 100%; max-width: 680px; padding: 0 6cqw; } .n4-lighthouse .n4-title { margin: 0; font-size: clamp(17px,4.2cqmin,36px); font-weight: 600; letter-spacing: -.02em; line-height: 1.15; text-wrap: balance; } .n4-lighthouse .n4-sub { margin: 0; max-width: 34em; font-size: clamp(13px,2.4cqmin,18px); color: #a1a1a6; text-wrap: balance; } .n4-lighthouse .n4-tag { font: 600 clamp(10px,1.9cqmin,13px)/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); } .n4-lighthouse .n4-cta { margin-top: 1.8cqmin; display: inline-flex; align-items: center; gap: .5em; padding: .85em 1.5em; border-radius: 999px; background: #f5f5f7; color: #000; font-size: clamp(13px,2.2cqmin,16px); font-weight: 600; text-decoration: none; transition: transform .3s cubic-bezier(.25,.1,.25,1),box-shadow .3s cubic-bezier(.25,.1,.25,1); } .n4-lighthouse .n4-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -10px var(--accent); } .n4-lighthouse .n4-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; } .n4-lighthouse .n4-stars,.n4-lighthouse .n4-stars2 { position: absolute; inset: -4%; pointer-events: none; } .n4-lighthouse .n4-stars { background-image: radial-gradient(1px 1px at 8% 12%,#fff 60%,transparent),radial-gradient(1px 1px at 22% 68%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 35% 24%,#fff 60%,transparent),radial-gradient(1px 1px at 48% 82%,#fff 60%,transparent),radial-gradient(1px 1px at 57% 9%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 66% 44%,#fff 60%,transparent),radial-gradient(1px 1px at 74% 72%,#fff 60%,transparent),radial-gradient(1px 1px at 86% 18%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 93% 58%,#fff 60%,transparent),radial-gradient(1px 1px at 14% 42%,#fff 60%,transparent),radial-gradient(1px 1px at 40% 55%,#fff 60%,transparent),radial-gradient(1px 1px at 81% 90%,#fff 60%,transparent),radial-gradient(1px 1px at 4% 88%,#fff 60%,transparent),radial-gradient(1px 1px at 62% 30%,#fff 60%,transparent); opacity: .75; animation: n4-lighthouse-tw calc(5s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-stars2 { background-image: radial-gradient(2px 2px at 18% 30%,rgba(255,255,255,.9) 50%,transparent),radial-gradient(1.5px 1.5px at 72% 20%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 30% 85%,rgba(255,255,255,.7) 50%,transparent),radial-gradient(1.5px 1.5px at 88% 70%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 52% 60%,rgba(255,255,255,.6) 50%,transparent),radial-gradient(1.5px 1.5px at 6% 55%,rgba(255,255,255,.8) 50%,transparent); opacity: .55; animation: n4-lighthouse-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse; } .n4-lighthouse [data-depth] { transition: transform .9s cubic-bezier(.2,.7,.2,1); } @keyframes n4-lighthouse-tw { from { opacity: .3; } } @keyframes n4-lighthouse-spin { to { transform: rotate(1turn); } } @keyframes n4-lighthouse-fade { from { opacity: 0; transform: translateY(10px); } } @media (prefers-reduced-motion:reduce) { .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { animation: none!important; transition: none!important; } } .n4-lighthouse { background: linear-gradient(#071720,#0f2f3d 46%,#16404f 56%,#06161d 56.2%,#020a0e); color: #eaf4f7; } .n4-lighthouse .n4-sky { position: absolute; inset: 0; overflow: hidden; } .n4-lighthouse .n4-big { position: absolute; left: 0; right: 0; top: 6%; margin: 0; display: grid; justify-content: center; font: 800 28cqmin/1 "Helvetica Neue",Helvetica,Arial,system-ui,sans-serif; letter-spacing: -.06em; } .n4-lighthouse .n4-big span { grid-area: 1/1; } .n4-lighthouse .n4-dim { color: transparent; -webkit-text-stroke: 1px rgba(234,244,247,.16); } .n4-lighthouse .n4-lit { color: #fff3c9; text-shadow: 0 0 3cqmin rgba(255,213,107,.6); -webkit-mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); } .n4-lighthouse .n4-fog { position: absolute; left: -30%; right: -30%; top: 16%; height: 40%; background: radial-gradient(35% 45% at 30% 50%,rgba(160,195,205,.18),transparent 70%),radial-gradient(30% 40% at 72% 40%,rgba(160,195,205,.13),transparent 70%); filter: blur(2cqmin); animation: n4-lighthouse-drift calc(26s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-f2 { top: 34%; opacity: .8; animation-duration: calc(34s / var(--k)); animation-direction: alternate-reverse; } .n4-lighthouse .n4-beam { position: absolute; left: var(--lx,82%); top: var(--ly,30%); width: 160cqmax; height: 34cqmin; margin-top: -17cqmin; transform-origin: 0 50%; rotate: var(--a,200deg); clip-path: polygon(0 48.5%,100% 0,100% 100%,0 51.5%); background: linear-gradient(90deg,rgba(255,230,160,.5),rgba(255,230,160,.12) 45%,transparent 80%); mix-blend-mode: screen; pointer-events: none; } .n4-lighthouse .n4-rock { position: absolute; right: 3%; bottom: 43%; width: 28cqmin; height: 6cqmin; border-radius: 50% 50% 0 0/100% 100% 0 0; background: #08171d; } .n4-lighthouse .n4-tower { position: absolute; right: 11%; bottom: 44%; width: 6.5cqmin; height: 26cqmin; } .n4-lighthouse .n4-body { position: absolute; inset: 0; clip-path: polygon(24% 0,76% 0,100% 100%,0 100%); background: linear-gradient(90deg,rgba(0,0,0,.4),transparent 45%,rgba(0,0,0,.3)),repeating-linear-gradient(#e9e4da 0 4.4cqmin,#b3261e 4.4cqmin 8.8cqmin); } .n4-lighthouse .n4-gal { position: absolute; left: -6%; right: -6%; top: -.8cqmin; height: 1cqmin; border-radius: .3cqmin; background: #1d2428; } .n4-lighthouse .n4-lamp { position: absolute; left: 16%; right: 16%; bottom: calc(100% + .4cqmin); height: 4cqmin; border-radius: .4cqmin; background: radial-gradient(circle,#fff8d6 0 30%,#ffd56b 55%,rgba(255,213,107,.35)); box-shadow: 0 0 4cqmin 1cqmin rgba(255,213,107,.5); } .n4-lighthouse .n4-lamp::before { content: ""; position: absolute; left: -22%; right: -22%; bottom: 100%; height: 2.6cqmin; clip-path: polygon(50% 0,100% 100%,0 100%); background: #1d2428; } .n4-lighthouse .n4-sea { position: absolute; left: 0; bottom: 41.5%; width: 200%; height: 5cqmin; animation: n4-lighthouse-waves calc(10s / var(--k)) linear infinite; } .n4-lighthouse .n4-sea path { fill: #06161d; } .n4-lighthouse .n4-copy { position: absolute; left: 0; right: 0; bottom: 5cqh; margin: 0 auto; } .n4-lighthouse .n4-tag { color: var(--accent); } .n4-lighthouse .n4-title { font-size: clamp(20px,4.8cqmin,40px); font-weight: 700; letter-spacing: -.025em; } .n4-lighthouse .n4-sub { color: #9fb6bf; } .n4-lighthouse .n4-cta { background: var(--accent); color: #1b1503; } @keyframes n4-lighthouse-drift { to { transform: translateX(12%); } } @keyframes n4-lighthouse-waves { to { transform: translateX(-50%); } } `; // Parallax con el puntero: JavaScript del DOM, el mismo de la pestaña JS. // eslint-disable-next-line @typescript-eslint/no-explicit-any function setup(el: any) { const sky = el.querySelector(".n4-sky"); const lamp = el.querySelector(".n4-lamp"); const lit = el.querySelector(".n4-lit"); const rm = matchMedia("(prefers-reduced-motion: reduce)").matches; const k = parseFloat(getComputedStyle(el).getPropertyValue("--k")) || 1; let px = 0, py = 0, until = 0, raf = 0, sx = -1, sy = 0; const t0 = performance.now(); const frame = (t) => { const r = el.getBoundingClientRect(), l = lamp.getBoundingClientRect(), b = lit.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; const lx = (l.left + l.width / 2 - r.left) / s, ly = (l.top + l.height / 2 - r.top) / s; const bx = (b.left - r.left) / s, by = (b.top - r.top) / s, bw = b.width / s, bh = b.height / s; let tx = px, ty = py; if (t > until) { tx = bx + bw * (0.5 + 0.6 * Math.sin(((t - t0) / 1000) * 0.7 * k)); ty = by + bh * 0.55; } if (sx < 0 || rm) { sx = tx; sy = ty; } sx += (tx - sx) * 0.08; sy += (ty - sy) * 0.08; sky.style.setProperty("--lx", lx.toFixed(1) + "px"); sky.style.setProperty("--ly", ly.toFixed(1) + "px"); sky.style.setProperty("--a", ((Math.atan2(sy - ly, sx - lx) * 180) / Math.PI).toFixed(2) + "deg"); lit.style.setProperty("--mx", (sx - bx).toFixed(1) + "px"); lit.style.setProperty("--my", (sy - by).toFixed(1) + "px"); if (!rm) raf = requestAnimationFrame(frame); }; const move = (e) => { const r = el.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; px = (e.clientX - r.left) / s; py = (e.clientY - r.top) / s; until = performance.now() + 2500; if (rm) frame(performance.now()); }; el.addEventListener("pointermove", move); raf = requestAnimationFrame(frame); return () => { cancelAnimationFrame(raf); el.removeEventListener("pointermove", move); }; } export default function NotFoundLighthouse() { const ref = useRef(null); useEffect(() => { const el = ref.current?.firstElementChild; return el ? setup(el) : undefined; }, []); return ( <>

Heading 404

This page never reached port.

The lighthouse is searching for it in the fog, but it isn't on the chart. Head back to the harbor mouth and pick another course.

Back to port

); } ``` ## Prompt for AI assistants Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…): ````text I want to add the “Lighthouse 404” block (404) from AIMRAN Library to my project. ## What it is A lighthouse sweeps the fog at night and its beam uncovers a giant 404 in the sky; with the pointer you steer the light. ## Chosen settings - Accent color: #ffd56b - Speed: 1x (from 0.5 to 2x) - Title: "Esta página no ha llegado a puerto." - Message: "El faro la busca entre la niebla, pero no aparece en la carta náutica. Vuelve a la bocana y elige otro rumbo." - Button: "Volver a puerto" ## What I need 1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing. 2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file. 3. Expose the settings above as props (or CSS variables) with those values as defaults. 4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens. 5. Make it look right in light and dark mode. 6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support. 7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result. ## Reference code ```tsx // @ts-nocheck: setup() es JavaScript del DOM sin tipos. import { useEffect, useRef } from "react"; const css = ` .n4-lighthouse { --accent: #ffd56b; --k: 1; position: fixed; inset: 0; z-index: 0; overflow: hidden; container-type: size; display: grid; place-items: center; background: #000; color: #f5f5f7; font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",system-ui,sans-serif; -webkit-font-smoothing: antialiased; text-align: center; line-height: 1.4; } .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { box-sizing: border-box; } .n4-lighthouse .n4-copy { position: relative; z-index: 5; display: flex; flex-direction: column; align-items: center; gap: 1.6cqmin; width: 100%; max-width: 680px; padding: 0 6cqw; } .n4-lighthouse .n4-title { margin: 0; font-size: clamp(17px,4.2cqmin,36px); font-weight: 600; letter-spacing: -.02em; line-height: 1.15; text-wrap: balance; } .n4-lighthouse .n4-sub { margin: 0; max-width: 34em; font-size: clamp(13px,2.4cqmin,18px); color: #a1a1a6; text-wrap: balance; } .n4-lighthouse .n4-tag { font: 600 clamp(10px,1.9cqmin,13px)/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); } .n4-lighthouse .n4-cta { margin-top: 1.8cqmin; display: inline-flex; align-items: center; gap: .5em; padding: .85em 1.5em; border-radius: 999px; background: #f5f5f7; color: #000; font-size: clamp(13px,2.2cqmin,16px); font-weight: 600; text-decoration: none; transition: transform .3s cubic-bezier(.25,.1,.25,1),box-shadow .3s cubic-bezier(.25,.1,.25,1); } .n4-lighthouse .n4-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -10px var(--accent); } .n4-lighthouse .n4-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; } .n4-lighthouse .n4-stars,.n4-lighthouse .n4-stars2 { position: absolute; inset: -4%; pointer-events: none; } .n4-lighthouse .n4-stars { background-image: radial-gradient(1px 1px at 8% 12%,#fff 60%,transparent),radial-gradient(1px 1px at 22% 68%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 35% 24%,#fff 60%,transparent),radial-gradient(1px 1px at 48% 82%,#fff 60%,transparent),radial-gradient(1px 1px at 57% 9%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 66% 44%,#fff 60%,transparent),radial-gradient(1px 1px at 74% 72%,#fff 60%,transparent),radial-gradient(1px 1px at 86% 18%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 93% 58%,#fff 60%,transparent),radial-gradient(1px 1px at 14% 42%,#fff 60%,transparent),radial-gradient(1px 1px at 40% 55%,#fff 60%,transparent),radial-gradient(1px 1px at 81% 90%,#fff 60%,transparent),radial-gradient(1px 1px at 4% 88%,#fff 60%,transparent),radial-gradient(1px 1px at 62% 30%,#fff 60%,transparent); opacity: .75; animation: n4-lighthouse-tw calc(5s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-stars2 { background-image: radial-gradient(2px 2px at 18% 30%,rgba(255,255,255,.9) 50%,transparent),radial-gradient(1.5px 1.5px at 72% 20%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 30% 85%,rgba(255,255,255,.7) 50%,transparent),radial-gradient(1.5px 1.5px at 88% 70%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 52% 60%,rgba(255,255,255,.6) 50%,transparent),radial-gradient(1.5px 1.5px at 6% 55%,rgba(255,255,255,.8) 50%,transparent); opacity: .55; animation: n4-lighthouse-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse; } .n4-lighthouse [data-depth] { transition: transform .9s cubic-bezier(.2,.7,.2,1); } @keyframes n4-lighthouse-tw { from { opacity: .3; } } @keyframes n4-lighthouse-spin { to { transform: rotate(1turn); } } @keyframes n4-lighthouse-fade { from { opacity: 0; transform: translateY(10px); } } @media (prefers-reduced-motion:reduce) { .n4-lighthouse *,.n4-lighthouse *::before,.n4-lighthouse *::after { animation: none!important; transition: none!important; } } .n4-lighthouse { background: linear-gradient(#071720,#0f2f3d 46%,#16404f 56%,#06161d 56.2%,#020a0e); color: #eaf4f7; } .n4-lighthouse .n4-sky { position: absolute; inset: 0; overflow: hidden; } .n4-lighthouse .n4-big { position: absolute; left: 0; right: 0; top: 6%; margin: 0; display: grid; justify-content: center; font: 800 28cqmin/1 "Helvetica Neue",Helvetica,Arial,system-ui,sans-serif; letter-spacing: -.06em; } .n4-lighthouse .n4-big span { grid-area: 1/1; } .n4-lighthouse .n4-dim { color: transparent; -webkit-text-stroke: 1px rgba(234,244,247,.16); } .n4-lighthouse .n4-lit { color: #fff3c9; text-shadow: 0 0 3cqmin rgba(255,213,107,.6); -webkit-mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); mask: radial-gradient(circle 15cqmin at var(--mx,50%) var(--my,50%),#000 25%,transparent); } .n4-lighthouse .n4-fog { position: absolute; left: -30%; right: -30%; top: 16%; height: 40%; background: radial-gradient(35% 45% at 30% 50%,rgba(160,195,205,.18),transparent 70%),radial-gradient(30% 40% at 72% 40%,rgba(160,195,205,.13),transparent 70%); filter: blur(2cqmin); animation: n4-lighthouse-drift calc(26s / var(--k)) ease-in-out infinite alternate; } .n4-lighthouse .n4-f2 { top: 34%; opacity: .8; animation-duration: calc(34s / var(--k)); animation-direction: alternate-reverse; } .n4-lighthouse .n4-beam { position: absolute; left: var(--lx,82%); top: var(--ly,30%); width: 160cqmax; height: 34cqmin; margin-top: -17cqmin; transform-origin: 0 50%; rotate: var(--a,200deg); clip-path: polygon(0 48.5%,100% 0,100% 100%,0 51.5%); background: linear-gradient(90deg,rgba(255,230,160,.5),rgba(255,230,160,.12) 45%,transparent 80%); mix-blend-mode: screen; pointer-events: none; } .n4-lighthouse .n4-rock { position: absolute; right: 3%; bottom: 43%; width: 28cqmin; height: 6cqmin; border-radius: 50% 50% 0 0/100% 100% 0 0; background: #08171d; } .n4-lighthouse .n4-tower { position: absolute; right: 11%; bottom: 44%; width: 6.5cqmin; height: 26cqmin; } .n4-lighthouse .n4-body { position: absolute; inset: 0; clip-path: polygon(24% 0,76% 0,100% 100%,0 100%); background: linear-gradient(90deg,rgba(0,0,0,.4),transparent 45%,rgba(0,0,0,.3)),repeating-linear-gradient(#e9e4da 0 4.4cqmin,#b3261e 4.4cqmin 8.8cqmin); } .n4-lighthouse .n4-gal { position: absolute; left: -6%; right: -6%; top: -.8cqmin; height: 1cqmin; border-radius: .3cqmin; background: #1d2428; } .n4-lighthouse .n4-lamp { position: absolute; left: 16%; right: 16%; bottom: calc(100% + .4cqmin); height: 4cqmin; border-radius: .4cqmin; background: radial-gradient(circle,#fff8d6 0 30%,#ffd56b 55%,rgba(255,213,107,.35)); box-shadow: 0 0 4cqmin 1cqmin rgba(255,213,107,.5); } .n4-lighthouse .n4-lamp::before { content: ""; position: absolute; left: -22%; right: -22%; bottom: 100%; height: 2.6cqmin; clip-path: polygon(50% 0,100% 100%,0 100%); background: #1d2428; } .n4-lighthouse .n4-sea { position: absolute; left: 0; bottom: 41.5%; width: 200%; height: 5cqmin; animation: n4-lighthouse-waves calc(10s / var(--k)) linear infinite; } .n4-lighthouse .n4-sea path { fill: #06161d; } .n4-lighthouse .n4-copy { position: absolute; left: 0; right: 0; bottom: 5cqh; margin: 0 auto; } .n4-lighthouse .n4-tag { color: var(--accent); } .n4-lighthouse .n4-title { font-size: clamp(20px,4.8cqmin,40px); font-weight: 700; letter-spacing: -.025em; } .n4-lighthouse .n4-sub { color: #9fb6bf; } .n4-lighthouse .n4-cta { background: var(--accent); color: #1b1503; } @keyframes n4-lighthouse-drift { to { transform: translateX(12%); } } @keyframes n4-lighthouse-waves { to { transform: translateX(-50%); } } `; // Parallax con el puntero: JavaScript del DOM, el mismo de la pestaña JS. // eslint-disable-next-line @typescript-eslint/no-explicit-any function setup(el: any) { const sky = el.querySelector(".n4-sky"); const lamp = el.querySelector(".n4-lamp"); const lit = el.querySelector(".n4-lit"); const rm = matchMedia("(prefers-reduced-motion: reduce)").matches; const k = parseFloat(getComputedStyle(el).getPropertyValue("--k")) || 1; let px = 0, py = 0, until = 0, raf = 0, sx = -1, sy = 0; const t0 = performance.now(); const frame = (t) => { const r = el.getBoundingClientRect(), l = lamp.getBoundingClientRect(), b = lit.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; const lx = (l.left + l.width / 2 - r.left) / s, ly = (l.top + l.height / 2 - r.top) / s; const bx = (b.left - r.left) / s, by = (b.top - r.top) / s, bw = b.width / s, bh = b.height / s; let tx = px, ty = py; if (t > until) { tx = bx + bw * (0.5 + 0.6 * Math.sin(((t - t0) / 1000) * 0.7 * k)); ty = by + bh * 0.55; } if (sx < 0 || rm) { sx = tx; sy = ty; } sx += (tx - sx) * 0.08; sy += (ty - sy) * 0.08; sky.style.setProperty("--lx", lx.toFixed(1) + "px"); sky.style.setProperty("--ly", ly.toFixed(1) + "px"); sky.style.setProperty("--a", ((Math.atan2(sy - ly, sx - lx) * 180) / Math.PI).toFixed(2) + "deg"); lit.style.setProperty("--mx", (sx - bx).toFixed(1) + "px"); lit.style.setProperty("--my", (sy - by).toFixed(1) + "px"); if (!rm) raf = requestAnimationFrame(frame); }; const move = (e) => { const r = el.getBoundingClientRect(); const s = r.width / el.offsetWidth || 1; px = (e.clientX - r.left) / s; py = (e.clientY - r.top) / s; until = performance.now() + 2500; if (rm) frame(performance.now()); }; el.addEventListener("pointermove", move); raf = requestAnimationFrame(frame); return () => { cancelAnimationFrame(raf); el.removeEventListener("pointermove", move); }; } export default function NotFoundLighthouse() { const ref = useRef(null); useEffect(() => { const el = ref.current?.firstElementChild; return el ? setup(el) : undefined; }, []); return ( <>

Heading 404

This page never reached port.

The lighthouse is searching for it in the fog, but it isn't on the chart. Head back to the harbor mouth and pick another course.

Back to port

); } ``` Give me the complete final code, ready to paste, and tell me in one line where to put it in my project. ````