The user wants a beautiful hero section for a UK electrician company website, delivered as a single HTML file. Let me think about what would make this genuinely memorable and above average. Key considerations: - UK electrician company — so British tone of voice, NICEIC certification, Part P compliance, 24h callouts, areas served, etc. This authenticity matters. - It needs to feel crafted, not templated. No gradient banners, no generic blue/purple, no emoji, no three-column card rows, no Inter/Roboto. Design direction thinking: What's the concept? An electrician = electricity, light, circuits, current. The obvious cheap route is neon glowing effects everywhere — I should avoid glow ornaments. But there's a genuinely interesting idea: **light itself as the design material**. A hero where the interaction is literally "switching on the lights". Signature moment idea: a working light switch (UK style rocker switch — the classic British square plate switch!) that the user can flip, and the page transitions from a dark "power off" state to a lit "power on" state. That's deeply on-brand for an electrician, it's interactive, it's memorable, and it uses a real UK cultural object (the UK light switch plate is distinctive — square with a rocker). That's my signature moment. Alternatively, an interactive circuit diagram that traces power from the national grid to the home. Or a "fault finding" diagnostic aesthetic. Let me commit to the **UK light switch hero**: - Page loads in a dim state: dark but legible, with a hint of the content (maybe low-contrast outlines). - A beautifully rendered UK rocker switch (CSS-built, square brushed plate, "ON" markings) sits in the hero — user clicks/presses it (or presses spacebar), the lights come on: background brightens, an illustration/filament lights up, text snaps to full contrast, maybe a subtle warm wash. The switch itself gets a satisfying click animation (rocker tilts), and there's a real switch "clack" via Web Audio API (synthesized, no external file). - A copy line like "We bring the power back." or "Flip the switch on reliable electrics." Actually, let me think about whether the dark state is the "off" default. For a business hero, most visitors should immediately see the good stuff. Maybe: page loads with lights ON by default, but the switch is a delightful toggle. Or: load dim for 0.6s then auto-flick on with a staggered "circuit energising" sequence, teaching the user the switch exists. That auto-turn-on is a nice touch: a brief staged startup (like fluorescent tubes flickering) then full light, with the switch animating too. But auto-play might feel gimmicky... Actually a quick, tasteful auto-on after ~800ms with a flicker sequence would be the "first impression lands instantly" moment. And users can then toggle it off/on themselves. I'll do that. Hmm — one caution: flickering lights could read as an accessibility issue (photosensitivity). I'll keep the flicker very brief and gentle (2-3 quick steps over ~400ms), not rapid strobing. Visual language: - Colour: avoid default blue/purple. For a UK electrician, a confident palette: deep near-black ink (#101418 or a warm charcoal), warm off-white paper (#F7F4EE / cream), and a single accent — electric amber/yellow? Yellow is very "electricity" (warning signs, hazard tape, insulation tape). A rich amber/gold (#F2B705 or a slightly deeper #E8A020) used sparingly. Actually UK electrical branding often uses yellow + black (hazard). A sophisticated take: cream background, ink text, amber accent, with fine hairline rules. That feels premium and British. - Or dark hero with warm light. Let me think: the "lights on/off" conce works best with a light theme as the "on" state. So default = warm cream paper, ink typography. Off = dims to a deep charcoal where text becomes dim but readable, and a few "indicator" elements (like an LED standby dot) stay lit. Typography: - Display: something characterful. Options from Google Fonts: "Fraunces" (serif, quirky), "Archivo" / "Archivo Expanded", "Space Grotesk" (overused now a bit), "Bricolage Grotesque" (nice, contemporary, has optical sizes), "Instrument Serif", "Gambetta"... For a trade company that should feel trustworthy but crafted: a strong grotesque like "Archivo" with tight tracking for the headline, or "Bricolage Grotesque" at heavy weight. Body/mono details: "Spline Sans Mono" or "IBM Plex Mono" for the technical labels (circuit references, voltages) — mono labels give that spec-sheet/electrical-drawing feel. Let me use Bricolage Grotesque for display + IBM Plex Mono for labels + maybe "Inter"? No — avoid Inter. Body can be Bricolage at lower weight or "Public Sans"? Keep it to two families: Bricolage Grotesque (display + body) and IBM Plex Mono (technical labels). That's clean. Layout concept (avoid generic centered hero): - Asymmetric editorial layout. Big headline left/bottom, technical marginalia in mono along edges (like an electrical schematic drawing title block): "SUPPLY: 230V ~ 50Hz", "NICEIC APPROVED CONTRACTOR", "EST. 1987", drawing-style coordinate ticks. - A schematic line running across the hero — an SVG "circuit trace" from a service head/meter symbol to the switch to the building, with animated current dashes when on. That ties the concept together: the circuit diagram is the compositional spine, and the switch sits on it. - Right side: maybe a visual — a cut-out illustration? Building a nice illustration in pure SVG: a stylised house/front door with a lantern? Or a large pendant bulb hanging that actually lights? A hanging pendant lamp whose cord drops from the top, with a bulb that lights on toggle — that's a lovely physical element paired with the switch. Bulb lights with warm radial light (a soft radial gradient — wait, I want to be careful with gradients; a radial gradient used to render actual light falloff from a bulb is representational rendering, not decorative gradient ornament — that's legitimate, it's drawing light). I'll use it purposefully: the glow only appears when switched on, it's the concept, not decoration. Hmm, pendant bulb + rocker switch + circuit line might be a lot. Let me compose carefully: Composition (desktop): - Full viewport hero, warm cream (#F4F1E8) with subtle paper grain (SVG noise filter at low opacity). - Top bar: left — wordmark "PARR & CO. ELECTRICAL" or something like "HALLIDAY ELECTRICAL". Let me pick a believable UK name: "Whitfield Electrical", "Bright & Boyle"? Something with character: "MERCER ELECTRICAL" — est. 1989, Sheffield? Or London. Let's do "Oakes & Sons Electrical" — feels like a family firm. Or "KILSBY & DRUCE"? Keep simple: "WOOLER ELECTRICAL" (Wooler is a Northumberland town — nice). Actually "Alderman & Frost"? I'll go with **"Oakes Electrical"** or... Let me choose "HARDCASTLE ELECTRICAL — Est. 1987, Leeds". Sounds right. Nav: Services, About, Areas, Contact + phone number button "0113 244 8080" (Leeds area code 0113) + "24h callout" tag. - Headline: big, e.g. "Safe hands. Live wires." or "The current that runs through Leeds." Hmm. Something like: "Good electrics are quiet. Bad ones keep you up at night." — too long. Big display: "POWER, DONE PROPERLY." — punchy, British. Or "We keep Leeds wired right." Or split: "Switched-on electricians" (pun). I like: **"Power, done properly."** with a supporting line: "NICEIC-approved electricians for homes and businesses across Leeds. Rewires, EV chargers, fault-finding and 24-hour callouts — done once, done right." - The rocker switch: placed prominently, maybe inline with the headline or to the right, labelled in mono: "MASTER SUPPLY — TRY ME" or with "ON/OFF" engraved. Size ~90px plate. - Pendant bulb: hangs from top-right area, cord crossing the hero, bulb roughly at 60-70% height. When on: warm filament + soft light pool onto the content below. Maybe the light pool subtly illuminates the headline. - Circuit trace: a thin SVG polyline running from left edge → through a few schematic nodes (symbols: fuse, earth symbol) → to the switch → to the bulb. Animated dashes flow when on. Nodes have tiny mono labels ("CU-01", "30mA RCD", "L1"). This is the craft detail. - Bottom strip: ticker/marquee? Could be nice: a marquee of services in mono uppercase separated by "◆" or "/": "REWIRES · FUSEBOARD UPGRADES · EV CHARGERS · EICR REPORTS · LANDLORD CERTS · OUTDOOR POWER · 24H CALLOUT". Marquees are a bit common now but done as a thin "hazard tape" style strip in amber with black text it fits the trade identity and adds motion. I'll style it like electrical hazard tape (diagonal black/amber edges? that might be too much — maybe just an amber strip with black mono text). Keep it. - Stats row? Instead of cards, a single inline row of mono facts separated by rules: "Est. 1987 / 12,400+ jobs / 4.9★ (312 reviews) / NICEIC 501-238-4X". As one hairline-ruled line, not cards. Good. - CTA: primary button "Get a free quote" (solid ink button, sharp or slightly rounded, with an arrow that nudges on hover) + secondary text link "or call 0113 244 8080 →". Buttons must work — wire them: quote button could scroll... there's no other section (it's a hero only). I'll make it open a small inline quote modal? The requirement says every interactive element wired to real behavior. A tasteful approach: "Get a quote" opens a minimal dialog (custom, not alert) with a tiny form (name, postcode, job) that on submit shows a toast "Thanks — we'll ring you back within the hour." That adds real functionality. Also phone link is tel:. Off state design: - When toggled off: background dims to #14161A-ish (a very dark warm charcoal), text dims (but keep essential contrast — the headline can go to a dim warm grey; I shouldn't create huge low-contrast gray areas... the off state is user-chosen and temporary, a playful easter egg; I'll keep text at reasonable contrast, like #8a8578 on #16140F, plus the standby LED lit in amber, and a small mono hint "Power off — flip the switch to restore"). The bulb goes dark, marquee pauses, current dashes stop. Maybe a subtle "hum stops" — audio! I can synthesize a 50Hz mains hum with Web Audio when on, very quiet, and it stops when off. That's a gorgeous detail. But auto-playing audio is bad; I'll only start audio after the user's first interaction (click), never on load. So: the auto-on at load is silent; once the user clicks the switch, audio context starts (click sound + optional faint hum with a toggle?). A hum might annoy — I'll include the click sound always (after first interaction) and a very subtle hum only while hovering? No — keep it simple: satisfying click sound synthesized via Web Audio (short noise burst + low thump). Good. Also: pressing the physical switch should feel mechanical. CSS: the rocker plate with an actual rocker that tilts (::before pseudo element with transform origin, translateY/X on state, plus a tiny shadow shift). Add a "press" scale on active. Maybe support keyboard: the switch is a ``` Un-pressable default styles: background none border none padding 0 cursor pointer. Under-plate label (mono 9px): "MASTER SUPPLY" — could be engraved on plate below rocker: put inside plate? Plates are small; place text under the plate as separate span outside button? Keep inside button container: wrap button in .switch-wrap with label span beneath, centered. But tilt press only on rocker. ok. Position: .switch-wrap { position:absolute; left: calc(118/460*100%); top: calc(468/640*100%); transform: translate(-50%,-50%); display flex column center gap 10 } — then under-label is part of wrap below plate. Then separate state line ("LIVE — 230V" / "MAINS ISOLATED") below at top 80%. And "FLIP TO TEST" hint — put it *above* plate? The hint with arrow pointing down-right from left. Place at left:0 top:63% (y~403)… that's near circuit line y376. Hmm place hint to the LEFT-BELOW: top 71%, left 0, arrow curving up-right toward plate at (118,468→ plate top ~420). Arrow from (10,560ish) to plate? Let me place hint text below-left: top: 73%; left: 2%; width 120px; text-align:right? and arrow above text pointing to plate. I'll iterate visually in my head: plate occupies x~70-166 (center 118, width 96/460=21% ≈ x 75-171 when figure 460 wide), y 420-516. Hint block: left: 0, top: 76% (y~486): text right-aligned, arrow svg positioned above-right of the text curving toward plate bottom-left corner (~(80,510)? no plate bottom 516, left edge 75). Arrow path from text top (x~90,y~480) curving to (78, 505)? Small tight arrow. Alternatively hint ABOVE the plate: top: 60% (y=384) — that's exactly the circuit line. Place at top: 57%, left: 2%: text "FLIP TO TEST ↷" with the arrow under it curving down-right to plate top (118, 415). Path M6,6 C20,26 34,32 44,34 arrowhead at (44,34). And state label BELOW plate (top 83%). This sits clear of circuit line at y376? y=57%*640=365 — overlapping line region x<70 (line is at x118 vertical from 432 up to 386 then corner at 118... vertical segment x=118 spans y 386-432; horizontal y=376 spans x128-242). Hint at left 2% (x~9-70) y 358-390 — near corner at (118,386) but x<70 so clear. Good enough; minor overlaps acceptable with tuning — I'll nudge: hint top: 59%. Actually, let me reconsider plate center y: 468 → plate top 468-48=420, bottom 516. Figure height 640 leaves 516→640 (124px) for state label + maybe earth? Earth is at (180,402) — inside region under horizontal line, fine, doesn't collide with plate (x 70-166? plate x from 118-48=70 to 166; earth at x180 clear). Wait: circuit path start M118,432 — switch top at 432 vs plate top 420: line should start under/at plate: start at (118,418) hidden behind plate. Set start y=414 so it's under the plate. Path: `M118 418 V386 Q118 376 128 376 H242 Q250 376 250 368 V322`. Bulb base tip at y≈318 → V322. Current dash animation: stroke-dasharray: 1.5 9; animation dashmove .9s linear infinite (dashoffset -10.5); only visible when body.on (opacity transition). Add round linecap → dotted current. Color accent, width 2.5. Also bulb "on" extra: add tiny star sparkle? skip. Now the wash/glow positions in %: bulb center (250,256) → 54.35%, 40%. glow size relative: width: 70% of figure? figure width 460 → glow 320px ≈ 70%. Set .glow{ width: 72%; aspect-ratio:1; }. wash: width: 150%, left 30%? Place wash center near bulb: left 54%, top 40%, width 160%, aspect 1, translate -50,-50. But wash extends beyond hero right edge — hero overflow hidden handles. Hmm wash at 160% width huge; maybe two washes: one at bulb (medium, warm .18), one broad ambient from top-right corner (radial at 80% -10%, rgba(255,190,90,.10), covering hero) — do ambient as hero::before with big radial at top right + smaller center-bottom? When on: hero::before opacity 1. Position radial at (72% 18%): `background: radial-gradient(900px 700px at 72% 22%, rgba(255,187,84,.16), transparent 60%)`. And maybe second radial near bottom-left faint (.06). Nice: gives "room lit from lamp" feel without covering text illegibly. It's a representational light — I'm comfortable. Also switch-on micro-interaction: headline period pulses? skip. Let me also handle the initial state classes: body starts with class "boot" (off, no transitions to avoid flash) — set styles so that first paint = off instantly: put `body{...off styles...}` default? Better: default body = off styles; .on adds lit styles. Boot: add .preload class (via script early or just accept transitions at load—initial render has no transition since it's the starting state; transitions only animate on change). So default (no .on) = off. JS after 900ms adds .on (+.flicker). If reduced motion: add .on after 250ms, no flicker. If JS disabled… page stays dark — acceptable edge; add

/`; phone: simple handset path; close: X lines; bolt for logo. Alright — also ensure NO emojis anywhere; separators use "/" characters; the "I/O" letters fine. Double-check equal-width card avoidance: facts strip is a single ruled row — fine. Figure is one composed specimen — fine. Layout is asymmetric editorial — fine. Gradients audit: I use radial gradients ONLY as literal light rendering (bulb glow, room wash) — representational, purposeful, part of the core concept. Plastic switch shading via box-shadows, not gradients. Buttons flat. Background flat cream + noise. Good — this doesn't read as "gradient decoration", it reads as light. Now, headline with mixed font: ``` Power, done properly.

items

items (same)

REWIRES/` approx classic. - bolt logo: `` in 16 box; fill currentColor with slight rounding? fine. - close X: two lines. - check? none. Modal select options: "Fault finding / repair", "Full or partial rewire", "Fuseboard upgrade", "EV charge point", "EICR / landlord certificate", "Something else". Submit button text: "Request callback". Also honeypot? unnecessary. Toast after submit: `Thanks ${first} — callback booked. We'll ring ${phone? no, say "within the hour (Mon–Sat)."}` Compose: `Thanks ${first} — we'll ring you back within the hour.` plus maybe second toast? one enough. Also clicking nav "24h callout" → tel link (real behavior). Free quote buttons (header + hero) open modal — two triggers; store lastTrigger for focus return. Edge: audio on rapid toggling fine. Let me write the flicker keyframes: ``` @keyframes strike{ 0%{opacity:0} 8%{opacity:.42} 16%{opacity:.05} 30%{opacity:.55} 46%{opacity:.08} 62%{opacity:.3} 100%{opacity:0} } .surge.flicker{ animation: strike .55s ease-out } ``` surge base: position fixed inset 0 background #FFD98A mix-blend-mode:overlay? On dark bg overlay lightens subtly; also plain normal with opacity .4 gives milky wash — ok either; choose mix-blend: soft-light? I'll use background #FFCF7E, mix-blend-mode: overlay, opacity 0, pointer-events none. Also when powering on, add slight whole-page scale? skip. Rocker transform specifics: ``` .plate{perspective:140px} .rocker{ transform: rotateX(-8deg); /* OFF: bottom pressed → top sticks out */ box-shadow: inset 0 3px 4px rgba(255,255,255,.65), inset 0 -4px 7px rgba(0,0,0,.28), 0 2px 3px rgba(0,0,0,.28);} ``` Hmm "OFF pressed at bottom": bottom recessed → bottom dark inner shadow, top protrudes → light on top edge, and rocker top edge casts shadow onto plate below?? Physical: if top protrudes, shadow under top edge appears at... the plate visible gap around rocker; protruding top edge would cast a small shadow downward onto plate below the top gap — subtle; ignore, inner shadows suffice. ON: rotateX(8deg); box-shadow: inset 0 5px 8px rgba(0,0,0,.3), inset 0 -2px 3px rgba(255,255,255,.55), 0 1px 2px rgba(0,0,0,.2); transition: transform .12s cubic-bezier(.3,1.6,.4,1), box-shadow .12s; .rocker:active → transform: rotateX(current ±) scale(.98)? can't easily compose; use .switch:active .rocker{ filter:brightness(.97) translateY(1px) }. ``` I/O marks: absolutely positioned spans font mono 9px color rgba(0,0,0,.38); .i top:7px; .o bottom:7px; center horizontally. Also both engraved (text-shadow 0 1px 0 rgba(255,255,255,.5)). Slot: width 18px h 4px radius 2 top:16px center; off-state bg #b9b2a2 inset shadow; on: bg #FFB020 box-shadow 0 0 8px rgba(255,176,32,.9), plus glow transition .25s. Wait slot at top but ON = top pressed — LED near top ok. Plate bg: #F0EBDF; border-radius 9px; padding 7px; box-shadow: 0 1px 0 rgba(255,255,255,.6) inset, 0 -1px 0 rgba(0,0,0,.06) inset, 0 3px 8px rgba(20,15,5,.18), 0 0 0 1px rgba(0,0,0,.14); body:not(.on) .plate{ filter:brightness(.45) }. "MASTER SUPPLY" label under plate: mono 9px letterspace, color var(--tx-soft), margin-top 8px. Also tiny screw dots on plate corners? cute: 4 pseudo? only 2 pseudos; add two spans? Skip screws — keep clean. Switch hover: .switch:hover .rocker{ box-shadow brighten + translateY(-1px)? } subtle. Nudge keyframes: ``` @keyframes nudge{ 0%,100%{transform:rotateX(8deg)} 35%{transform:rotateX(1deg)} 60%{transform:rotateX(11deg)} 80%{transform:rotateX(5deg)} } body.nudge .rocker{ animation: nudge .55s ease-in-out } ``` (add class to body at 1.6s after first on, remove at 2.3s.) Hint pulse: ``` @keyframes hintPulse{0%,100%{opacity:.45}50%{opacity:.95}} body.on .hint{animation:hintPulse 2.4s ease-in-out infinite} body:not(.on) .hint{opacity:.8} ``` Hmm hint only shown while on? show always but pulse when on. In off (dark) hint dim visible fine. State label styles: mono 9.5px letterspacing 1.5px uppercase; .live color var(--accent-deep)? on cream accent amber text small might be low contrast (amber on cream poor). Use ink with amber leading square marker when live; when isolated, color var(--tx-soft) + text "MAINS ISOLATED". Add marker dot span. Readout: ```

SUPPLY

0.0V~

50.00 Hz · LOAD 0.00 A

``` r-val font Bricolage 600 30px; small mono 11px. dot: 6px square? circle border 1px var(--tx-soft); body.on → filled accent + glow tiny. Off transition: numbers animate? just set. Facts: `

EST. 1987...` with separators as ::after "/"? Use CSS: .facts span+span::before{content:"/"; margin:0 18px; color:var(--accent)}? With flex-wrap, fine. Also prefix each with tiny square? The "/" separators suffice. Add class .hide-sm on two for mobile? Instead font shrink + wrap; keep all, allow wrap with row-gap 6px; separators still fine. Also add a right-aligned element in facts: "BS 7671:2018+A2 CERTIFIED" maybe. Items list: 1. EST. 1987 — LEEDS 2. NICEIC APPROVED CONTRACTOR 3. PART P REGISTERED 4. 12,400+ JOBS CERTIFIED 5. 4.9/5 · 312 REVIEWS Wrap on small. Hero P sub: max-width 46ch; color var(--tx-soft); size 16.5px lh 1.65. Kicker style: mono 11px ls .18em uppercase color var(--tx); with preceding 24px rule inline (span.rule{width:26px;height:1px;background:var(--accent)}). CTA row gap 14, margin-top 30. Primary btn: bg var(--ink-solid) which in off should invert? Buttons in off: bg should stay ink-dark? On dark bg an ink button invisible → define --btn-bg: on: #1C1913/cream text; off: #CBC2AD/ #17140E text (inverted). via vars --btn-bg/--btn-tx swapped. Hover: bg var(--accent) text #17140E both states; transition .25s; icon translate 2px on hover. Border-radius 8px? use 10px. Padding 13px 20px; font: Bricolage 600 15px. Header quote btn: smaller padding 9px 16px radius 8 same vars. Tel link: mono 13.5px with icon 14, color var(--tx); hover underline offset. Wordmark: bolt in accent inside 30px rounded square? Just bolt glyph colored accent (fill #E8A319) size 18 + text stack: ``` Hardcastle ELECTRICAL ``` Simpler: name "HARDCASTLE" Bricolage 700 16px ls .04em + below mono 9px ls .3em "ELECTRICIANS · LEEDS". Two-line lockup left-aligned. On dark (off) colors adapt via var(--tx). Now the modal markup: ``` ``` Field errors: span.err under field hidden default. Sheet style: bg var(--paper) but modal must look right regardless of power state → give sheet fixed palette (cream #FBF8F1, ink text) independent of body class, since overlay dims everything anyway. Inputs: border:0; border-bottom:1px solid rgba(28,25,19,.3); bg transparent; padding 10px 2px; font Bricolage 15px; focus border-color #C77E08. Labels mono 10px ls .14em uppercase color #6B6455. Overlay: fixed inset 0 bg rgba(23,18,10,.55); backdrop-filter blur(3px); display grid place-items center; z 90; opacity transition .2s; .sheet translateY(10px)→0. Toast: fixed left 20 bottom 20 z 95; toasts stack column gap 8. Toast: bg #1C1913 color #F3EFE6 border-left 3px solid var(--accent) padding 12px 16px mono 12px; animation slide-in; removing: add .out (opacity/translate) then remove after 300ms. Also success error styling: .err input border-color #B3401F; .err-msg color #B3401F mono 10px. JS jitter: also when on, occasionally flash readout? no. Also update caption? I added "FIG. 01 — LIGHTING CIRCUIT — GROUND FLOOR" static; maybe append status "· LIVE"/"· ISOLATED" dynamic: . Do it. Marquee pause when off: .track animation-play-state paused via body:not(.on) .track. Also stop jitter when off (guard in interval). Right — also `switch` id maybe conflicts nothing. One more nicety: pressing "L" toggles? skip. Also prefers-reduced-motion CSS: kill marquee animation (static overflow hidden single seq), transitions minimal, hint pulse off, surge off (JS checks), boot instant. Let me count that all interactive elements are wired: nav brand (href="#top" — add id="top" on body/header, works), tel links (2), quote buttons (2 → modal), switch (power), form (toast), close x, modal backdrop, select/inputs native. Marquee is aria-hidden decorative. Facts static text. Images: none needed (no picsum required). Good — fully vector/typographic. Time to write it. I'll be careful with the SVG figure markup and CSS % positioning. Also add `role="img"` aria-label to figure SVG, and the switch button has descriptive label. For the SVG, since I'm styling with CSS vars, define classes: .s-line{stroke:var(--tx); fill:none; stroke-width:1.5} etc. transitions on stroke .45s. Also bulb glass needs fill class .glass{fill:rgba(255,255,255,.05); transition:fill .4s} body.on .glass{fill:rgba(255,205,110,.26)}. Filament: .fil{stroke:var(--tx-faint); width 1.8; transition .35s} body.on .fil{stroke:#FFAF1E; stroke-width:2.2; filter:drop-shadow(0 0 4px rgba(255,170,30,.8))} — drop-shadow on filament = literal light emission; tiny, ok. Glow divs behind SVG? Place .glow divs inside .figure before svg (svg absolute too, both stacked). z-order: glows (z1), svg (z2) so bulb outline over glow, switch button (z3). Wash: hero::before as described, opacity 0, body.on hero::before opacity 1, transition 1s .1s. Also add a faint second wash bottom-left amber rgba(...,.05) for balance? sure combine in same background with two radial layers: ``` background: radial-gradient(1000px 640px at 74% 14%, rgba(255,187,84,.15), transparent 62%), radial-gradient(760px 520px at 18% 88%, rgba(255,187,84,.07), transparent 60%); ``` Also off-state hero could have a very subtle vignette (radial dark) — body bg already flat; add body:not(.on) .hero::before with dark vignette: rgba(0,0,0,.35) edges. Nice: define hero::before always, swap background via classes: ``` .hero::before{content:""; position:absolute; inset:0; pointer-events:none; transition:opacity .8s, background .8s?} ``` Background gradients can't transition smoothly; acceptable snap? Use two stacked pseudos: ::before = wash (opacity toggles), ::after = vignette (opacity toggles). But body::after already grain. figure glows separate. OK: - .hero::before = amber wash, opacity 0 ↔ 1. - .hero::after = vignette `background: radial-gradient(120% 90% at 50% 40%, transparent 40%, rgba(10,8,4,.5) 100%)`, opacity 0 ↔ (on) 1? vignette should exist when OFF only: body:not(.on) .hero::after{opacity:1}. But ::after on hero also used? fine. Wait grain uses body::after — keep hero::after vignette distinct. OK. But .hero overflow hidden + pseudos inset 0 fine. Z-index: hero-inner content z 2 above pseudos. Header z 20. Also: on very first frame before fonts load, layout shift — acceptable. Let me finalize the copy details & write everything. Also title/meta description. JS boot sequence detail: run after DOMContentLoaded; small delay via setTimeout; also preload: add class boot initially in markup: ``. Switch aria-label dynamic? aria-pressed enough with label "Master supply switch". One risk: In iframe sandbox, AudioContext fine after gesture; matchMedia fine. Also ensure marquee JS clone: track.innerHTML duplication of .seq node. Write select styling with custom chevron: appearance none + background chevron svg data-uri right side; keep simple: appearance:none; padding-right 22px; add chevron via background-image data-uri (currentColor can't in bg; use fixed color #6B6455). Fine. Also form row grid: two cols for postcode & job; mobile 1col. Now write final answer: brief intro line (I'll describe approach after code per delivery: code first, then explanation — "After writing code, include a brief text explanation"). Also start response not with heading, and speak directly. Include single HTML block. Then explanation of implementation + notable interactions. Keep explanation concise but informative. Let me write the HTML now carefully. Detailed CSS/JS write-through (mentally compiling): Also careful: `body.on .line>span{transform:translateY(0)}` with per-line delays: .line:nth-child(1)>span delay .18s; (2) .3s. Boot removal triggers transition since transform changes. For dimming states of copy when off (manual toggle): ``` body:not(.on) :is(.kicker,.sub,.ctas,.facts,.brand,.hnav){opacity:.55; } body:not(.on) .readout, body:not(.on) .figcap, body:not(.on) .state {opacity:.6} ``` transitions: give those elements `transition: opacity .45s ease, transform .55s cubic-bezier(.2,.8,.2,1)`. body.on delays: .kicker .06s, .sub .34s, .ctas .44s, .facts .55s, header items .02s; readout .5s; figcap .4s. But careful: when toggling OFF, body.on rules stop applying → delays revert to 0 (declared only in .on scope) → instant-ish dim over .45s. boot initial: opacity 0 for [data-reveal] elements + spans shifted. Implement data-reveal attr on: kicker, sub, ctas, facts, brand, hnav(el), readout, figcap, hint? plus state. Use selector list: ``` .boot :is(.kicker,.sub,.ctas,.facts,.brand,.nav-right,.readout,.figcap,.state,.hint,.dims){opacity:0 !important} .boot .line>span{transform:translateY(110%)} .boot .figure{opacity:0; transform:translateY(10px) scale(.985)}? maybe figure subtle rise: body.on .figure? give figure its own reveal: .boot .figure{opacity:0; transform: translateY(14px)} body.on transitions? figure contains many children each revealed; simpler: reveal figure container as one + inner annotations separately. I'll reveal .figure as a whole (opacity/translate, delay .25s) and skip per-annotation staging (readout/figcap just inherit). Then data-reveal list: kicker,sub,ctas,facts,brand,hnav. Figure separately. Simpler & cleaner. ``` So CSS: ``` .figure{ transition: opacity .7s ease .22s, transform .7s cubic-bezier(.2,.8,.2,1) .22s; } body.boot .figure{ opacity:0; transform: translateY(16px) } ``` and body:not(.on) .figure{opacity:.85}? When user toggles off, figure dims slightly — ok keep full but bulb dark suffices; keep figure opacity 1 always after boot. Also .line spans need transition on transform: `transition: transform .75s cubic-bezier(.2,.85,.25,1)`; delays per line under body.on. Reveal elements: `transition: opacity .5s ease;` + body.on delays per element type: ``` body.on .brand{transition-delay:.05s} body.on .hnav{transition-delay:.12s} body.on .kicker{transition-delay:.16s} body.on .sub{transition-delay:.42s} body.on .ctas{transition-delay:.52s} body.on .facts{transition-delay:.62s} ``` Off-dim: `body:not(.on) :is(.brand,.hnav,.kicker,.sub,.ctas,.facts){opacity:.5}` but during boot (before .on) these have opacity 0 from .boot — .boot selector must beat :not(.on) — both specificity 0-2-? `body.boot .kicker` = (0,2,1); `body:not(.on) .kicker` = (0,2,1). Order: put .boot rules AFTER. Also with !important safest. I'll place boot block last with !important on opacity? Then when .boot removed, fine. But !important also affects... only during boot. OK: `.boot :is(...){opacity:0!important}`. Hmm but if user toggles off then on again — boot already removed, fine. Readout values when off: volt "0.0", sub "0.00 Hz · LOAD 0.00 A", dot hollow, r-val maybe shows "—"? show 0.0. Also r-label text stays SUPPLY. Also state label: `

MAINS ISOLATED

`; .live .sdot filled accent; text color: default var(--tx-soft); live: var(--tx). small caps mono. sdot: 6px circle border 1px var(--tx-soft); live: background var(--accent); border-color var(--accent); box-shadow 0 0 6px rgba(232,163,25,.7). Figure width handling: .figure{position:relative; width:min(100%, clamp(280px,52vh,470px)); aspect-ratio:460/640; justify-self:end;} mobile: justify-self:center. Everything else standard. Media queries: - ≤1060px: hide .edge (vertical text). - ≤900px: grid 1col; .figure{justify-self:center; width:min(88vw,380px)}; hero-inner padding-top 110px; text-align:left keep; h1 clamp handles. - ≤560px: header hide phone number text (keep icon+number? hide number keep "24H" chip?) — simplest: hide .hnav .tel span.num on ≤480. Keep quote btn. Facts font 10px. hint hidden ≤560? keep but smaller. Dimension hidden ≤560. Readout scale .9. Also add `#top` anchor at body top. H1 em (Fraunces italic): `em{font-family:'Fraunces'; font-style:italic; font-weight:560? use 500; letter-spacing:0; font-size:1.02em; color:var(--tx)}` maybe slightly different weight looks nice; add amber? Keep ink; the period accent: `.dot{color:var(--accent); font-style:normal}` (i tag). h1 size: clamp(2.7rem, 6.6vw, 5rem); weight 750 (Bricolage variable? request wght 300..800 then use 750). lh .98; ls -0.025em. Kicker margin-bottom 22. OK also the little rule before kicker: `.kicker::before{content:""; display:inline-block; width:26px; height:2px; background:var(--accent); margin-right:12px; vertical-align:middle}`. Marquee text 11px ls .16em uppercase; padding 11px 0; sep margin 0 20px color: on = #E8A319; off = #6f6754. track transition for play-state not needed. Toast animation: @keyframes tin{from{opacity:0; transform:translateY(8px)}} .out{opacity:0; transform:translateY(6px); transition:.3s}. Modal .show handling: overlay default opacity 0; .overlay{transition:opacity .22s} .overlay.show{opacity:1} sheet transform transition. Focus trap light: keep simple; Escape closes. Also prevent body scroll when modal open (body overflow hidden) — page mostly fits anyway. Form validation code: ``` const digits = phone.replace(/\D/g,''); if(name.trim().length<2) err... if(digits.length<10) err... ``` Show/hide err spans; add .bad class to field wrapper. On success also maybe toast includes job label? keep simple. Also after closing modal return focus to trigger. Audio clack implementation: ``` let actx=null, nbuf=null; function audio(){ if(!actx){ const AC=window.AudioContext||window.webkitAudioContext; if(!AC) return null; actx=new AC(); const len=actx.sampleRate*0.05; nbuf=actx.createBuffer(1,len,actx.sampleRate); const d=nbuf.getChannelData(0); for(i...) d[i]=Math.random()*2-1; } if(actx.state==='suspended') actx.resume(); return actx; } function clack(on){ const c=audio(); if(!c) return; const t=c.currentTime; // click noise const src=c.createBufferSource(); src.buffer=nbuf; const bp=c.createBiquadFilter(); bp.type='bandpass'; bp.frequency.value= on?3100:2300; bp.Q.value=1.2; const g=c.createGain(); g.gain.setValueAtTime(.5,t); g.gain.exponentialRampToValueAtTime(.001,t+.06); src.connect(bp).connect(g).connect(c.destination); src.start(t); src.stop(t+.08); // thump const o=c.createOscillator(); o.type='sine'; o.frequency.setValueAtTime(on?180:140,t); o.frequency.exponentialRampToValueAtTime(60,t+.09); const g2=c.createGain(); g2.gain.setValueAtTime(.28,t); g2.gain.exponentialRampToValueAtTime(.001,t+.11); o.connect(g2).connect(c.destination); o.start(t); o.stop(t+.12); } ``` Guard try/catch. Jitter: ``` setInterval(()=>{ if(!on) return; volt.textContent=(229.55+Math.random()*.9).toFixed(1); hz.textContent=`${(49.95+Math.random()*.1).toFixed(2)} Hz · LOAD ${(0.34+Math.random()*.18).toFixed(2)} A`; },700); ``` render() sets off values. Boot: ``` setTimeout(()=>{ document.body.classList.remove('boot'); power(true,{strike:true}); }, reduced?150:900); ``` power sets on & body.on & updates. Note: removing boot and adding on same frame — transitions fire. nudge: in power when turning on first time: if(!nudged){nudged=true; setTimeout(()=>{document.body.classList.add('nudge'); setTimeout(()=>document.body.classList.remove('nudge'),700)},1700);} but only if !reduced. Surge element: `

`; function strike(){ if(reduced)return; surge.classList.remove('go'); void surge.offsetWidth; surge.classList.add('go'); } Manual toggle handler: switch.addEventListener('click', ()=>{ power(!on,{strike:on===false}); clack handled inside power }); Put clack inside power for both directions. Also make switch focus ring nice. Edge vertical text element inside hero: `

HARDCASTLE ELECTRICAL LTD — COMPANY REG. 0231 8847 — MADE IN LEEDS

` rotate. Now figure svg full markup: ``` ``` Wait filament path: stems down to 292 then base at 298 — small gap ok, extend to 296. Set d="M243 296 V272 L246 262 L250 271 L254 262 L257 272 V296". Classes: .s-line{stroke:var(--ink-line?)}. Use: ``` .art .s-line{stroke:var(--tx); stroke-width:1.6; } .art .s-line2{stroke:var(--tx); stroke-width:1.4; fill:none} .art .s-thin{stroke:var(--tx); stroke-width:1.1; opacity:.75} .art .s-fill{fill:var(--tx)} .art .s-txt{font:500 8.5px var(--mono); fill:var(--tx-soft); letter-spacing:.08em} .art .glass{fill:rgba(255,255,255,.04); stroke:var(--tx); stroke-width:1.6} .art .fil{stroke:var(--tx-soft); stroke-width:1.8; } .art .shine{opacity:.4} ``` with transitions stroke .4s fill .4s. body.on .glass{fill:rgba(255,206,110,.25)} body.on .fil{stroke:#FFAE1A; stroke-width:2.4; filter:drop-shadow(0 0 5px rgba(255,170,30,.85))} body.on .s-fill etc unchanged. .current{stroke:var(--accent); stroke-width:2.4; stroke-linecap:round; stroke-dasharray:.1 10; opacity:0; transition:opacity .4s} Hmm dasharray ".1 10" with round cap = dots. animate: @keyframes flow{to{stroke-dashoffset:-40.4}}? period = dasharray sum *? For seamless: dashoffset multiple of (10.1): -40.4 = 4 periods. animation: flow 1.1s linear infinite; body.on .current{opacity:1}. Reduced motion: animation none, opacity .9 static dots? set animation:none. Also strokes of current drawn over base line — fine. SVG text font var: --mono: 'IBM Plex Mono', monospace — in CSS var for reuse. Glows: ``` .glow{position:absolute; left:54.3%; top:40.3%; transform:translate(-50%,-50%); border-radius:50%; pointer-events:none; opacity:0; transition:opacity .9s ease} .glow.c{width:52%; aspect-ratio:1; background:radial-gradient(circle, rgba(255,205,105,.55), rgba(255,205,105,0) 68%); filter:blur(6px)} .glow.h{width:100%; aspect-ratio:1; background:radial-gradient(circle, rgba(255,195,90,.22), rgba(255,195,90,0) 65%); filter:blur(14px)} body.on .glow{opacity:1} ``` z-order: .art z-index:2; .glow z 1; switch wrap z 5; annotations z 4. Switch wrap: ``` .sw{position:absolute; z-index:5; left:25.7%; top:73.1%; transform:translate(-50%,-50%); display:flex; flex-direction:column; align-items:center; gap:9px; background:none; border:0; padding:6px; cursor:pointer;} ``` Wait — the button should be just the plate; label under. Make

``` Order: "24H CALLOUT" mono tiny chip (no bg? bordered pill, amber border? subtle: border 1px var(--line-strong) pill mono 9px) then tel number, then button. Chip links tel too. .bolt{width:17px; fill:var(--accent)} — accent amber bolt on cream ok (decorative small). b-txt strong: Bricolage 700 15.5px ls .01 color var(--tx); em block mono 8.5px ls .28em uppercase color var(--tx-soft) not italic. CTA hero primary: `` secondary: `or call 0113 244 8068` styled underline-ish mono? Make secondary a bordered ghost button? Editorial: plain link with underline offset: font 14.5px; border-bottom 1px. Include small "24H" tag? The header has it. Keep hero secondary simple text link. facts markup: `

…` with li::before "/" except first: li+li::before{content:"/"; margin:0 16px; color:var(--accent); font-weight:500}. flex wrap. marquee: `
` JS fills seq with spans and clones. items array. .mi{padding:0 20px}? Let item include trailing sep: build `${t}/` sequence: mi margin:0 22px, sep color accent. Ensure seq has display:flex align center; white-space nowrap. track animation 26s. Also aria-hidden on marquee, since decorative repetition (services also nowhere else... maybe fine aria-hidden yes). Now modal & toast CSS as planned. Also global: `*{box-sizing:border-box; margin:0}` body font: var(--disp) 16px; -webkit-font-smoothing. a colors inherit; text-decoration none default. Focus-visible. ::selection. Scrollbar? not needed. Let me also add subtle interactive parallax? The figure could tilt slightly on mouse move (transform rotate small) — "responds to input". A gentle 2-3deg parallax on .figure translate? Could add: on pointermove over hero, figure translate ±6px opposite cursor, glows shift. Tasteful with rAF lerp; disable reduced motion & touch. I'll add lightweight: target dx,dy = (e.clientX/w-.5), figure.style.transform = `translate(${dx*-10}px, ${dy*-8}px)`. But figure has reveal transform — conflict after reveal fine (reveal done). Apply to inner wrapper .fig-tilt inside .figure? figure itself is positioned children container; wrap all in .figure > .fig-in? Simpler: apply transform to .figure via CSS var --px/--py used in transform: translate(var(--px),var(--py)); combine with reveal transform... reveal uses same property. After boot, override fine. During reveal, values 0. OK set on .figure with combined transform: `transform: translate3d(var(--px,0),var(--py,0),0)`; and .boot .figure{transform:translate3d(0,16px,0); opacity:0}. transitions on transform .7s — parallax updates would lag .7s (smooth lerp effect anyway, kind of nice floaty). But transition also delays pointer response — with continuous small moves it eases — acceptable, actually pleasant. However transition-delay .22s applies too → laggy. Set transition 'opacity .7s ease .22s, transform .9s cubic...' no delay for transform? reveal delay then only on opacity; transform without delay: reveal rise starts immediately — fine. Also glow layers could parallax more for depth: set their transform translate calc(var(--px)*-1.6)... they use translate(-50%,-50%) — incorporate: transform:translate(calc(-50% + var(--px,0)*-1.6), calc(-50% + var(--py,0)*-1.2)). Sure. rAF lerp: track target from pointermove on window (desktop only matchMedia hover+pointer fine), current += (t-c)*.06 loop. Small but alive. Include. Also marquee direction maybe right-to-left standard. I think spec is complete. Also double-check no emoji anywhere, no lorem, no alert. Fonts: Bricolage Grotesque, Fraunces, IBM Plex Mono via one link. Potential pitfall: Bricolage variable weight syntax in Google Fonts URL v2: family=Bricolage+Grotesque:opsz,wght@12..96,200..800 — fine. Fraunces italic: family=Fraunces:ital,opsz,wght@1,9..144,300..600 — request italic only axis set: `Fraunces:ital,opsz,wght@1,9..144,400..600`. Display=swap. Now produce final code. I'll write ~700 lines. Let me carefully write, keeping consistent naming, and double check the pieces as I go. Colors final: - on bg: #F2EEE3 (warm bone) ; paper #FAF7EF; ink #201B12; soft #6A6250; faint #948B76; line rgba(32,27,18,.14); accent #E19A0C? Amber #E8A013; accent-ink for hover text #221A08. - off bg: #14110B; tx #CFC6AF; soft #97907B; faint #6E6753; line rgba(207,198,175,.14); marquee bg #1E1910 tx #8F8770. - bulb filament on: #FFA718. Marquee on: bg #201B12, tx #EFE9DA, sep #E8A013. Buttons: --btn-bg on: #201B12 tx #F2EEE3; off: #CFC6AF tx #14110B. hover bg accent, text #221A08. Let me write JS items array for marquee: ["Full & part rewires","Fuseboard upgrades","EV charge points","EICR reports","Landlord certificates","Outdoor power","Smart wiring","24h emergency callout"] uppercase via CSS. Modal select options match-ish. Toast message: `Cheers ${first} — we'll ring you back within the hour.` Add trailing "· Mon–Sat" maybe. Keep. Also include tiny detail: after successful submit, also set state? no. Also add keydown Escape closes modal. Also clicking "Get a fixed-price quote" while off? fine. Write now. Also remember: response language = English (user English). Include explanation after the code block, brief. One more check on hero-inner vertical centering with facts: hero has justify-content:center; children: .hero-inner (grid) and .facts. Add gap. padding-inline clamp. Also .hero{padding-top:88px} to clear header. Also `body{min-height:100svh; display:flex; flex-direction:column}` and .hero{flex:1}. marquee at end. header absolute → doesn't take flex space; body needs padding-top? hero padding-top handles. For very small heights, allow page scroll (min-height, not fixed height). Good. Now writing final deliverable. Also double-check: figure aspect 460/640 but width clamp(280px,52vh,470px) — at 52vh with vh 800=416→h 578; header 88 + hero pad + facts ~70 + marquee 40 + inner gaps: ~ 88+578+40+70=776 ✓. Mobile: width min(86vw,380px). hnav gap 18; chip hidden ≤640? keep chip, hide number ≤560 (span). Alright, also aria-live on stateTxt polite; readout values aria-hidden? fine leave. Also add . Title. Favicon: inline SVG data uri bolt — nice touch: . Encode: `%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Crect width='16' height='16' rx='3' fill='%2314110B'/%3E%3Cpath d='M9.2 1.5 3.4 9h3.5L6 14.6 12.6 7H9l.2-6Z' fill='%23E8A013'/%3E%3C/svg%3E`. Let me write out everything now in final form. I'll be meticulous about matching IDs between HTML/CSS/JS. Rocker inner shadows: since plate bg cream, rocker bg #E9E3D4 with border rgba(0,0,0,.08). Also rocker "press" — since whole button click, add .sw:active .plate{transform:scale(.985)} transition .08s. Switch tilt: default (OFF): rotateX(-9deg)? Determine visuals: ON (lights on) I said top pressed → top recedes → rotateX(+9deg)? rotateX positive rotates top backwards (away) — yes pressed top. So .on state: rotateX(9deg)? Hmm wait, that's when switch is ON... UK switch ON usually press the TOP (rocker "I" top goes in? actually pressing top pushes top in). OK ON: rotateX(9deg) top away (pressed). OFF: rotateX(-9deg). nudge keyframes for ON state (8deg base): as defined. But during boot, the switch should flip itself: body.on .rocker applies rotateX(9) with transition .12s spring — it'll snap at power-on. Edge: transition transform .12s on rocker also affects nudge animation? animation overrides transition. fine. Also give .plate transition filter .5s. Also 'prefers-reduced-motion' CSS: ``` @media (prefers-reduced-motion: reduce){ .track{animation:none} .hint{animation:none !important; opacity:.8} *{transition-duration:.01ms !important; animation-duration:.01ms !important}? too brutal (kills bulb fade gracefully) — but it's the correct a11y approach; use targeted: disable flow, hintPulse, strike handled in JS, keep color transitions? Keep transitions but shorten: I'll disable marquee & pulses & current flow; keep fades (non-vestibular). .current{animation:none} } ``` JS reduced also: no strike, no nudge, boot quick. Now finalize copy: H1: "Power," / "done properly." — with em properly. Sub: "From full rewires to 3 a.m. callouts, we've kept Leeds wired safe since 1987. Fixed prices agreed up front, tidy work, and every job certified to BS 7671 — by electricians who'd wire their own mums' houses the same way." Nice, personable. Maybe trim: "From full rewires to 3 a.m. callouts, we've kept Leeds wired safe since 1987 — fixed prices up front, tidy work, and every job certified to BS 7671." Good. Kicker: "NICEIC APPROVED CONTRACTOR — LEEDS & WEST YORKSHIRE". Primary CTA: "Get a fixed-price quote". Secondary: "or call 0113 244 8068 — 24h". Facts: "EST. 1987", "NICEIC APPROVED", "PART P REGISTERED", "12,400+ JOBS SIGNED OFF", "4.9/5 FROM 312 REVIEWS". Modal note: "Tell us what you need. A qualified electrician — not a call centre — rings you back within the hour, Mon–Sat." micro: "No spam, no sales scripts — just a spark with a diary." Toast on submit: `Cheers ${first} — we've pencilled you in. Expect a ring within the hour.` Off-state extra copy? state label covers it. Let me write the code. Actually one concern: `body:not(.on)` dim for .btn uses var(--btn-bg) swapped — transitions on background-color .35s include. Also make sure the switch doesn't trigger text selection: user-select none on .sw. Also hint arrow svg static stroke color var(--tx-soft). Writing final HTML (ordering: head styles, body markup, script). Also I should double check the .line>span initial (off, post-boot) state: after boot removed, base (no .on) transform? define `.line>span{display:block; transform:translateY(0); transition:transform .8s cubic-bezier(.19,.8,.22,1)}` and `.boot .line>span{transform:translateY(112%)}` — body.on doesn't need transform (defaults 0). Delays: `.boot` removal → animate from 112%→0: transition-delay needs applying at the moment class removed; delays defined on base `.line:nth-child(1)>span{transition-delay:.2s}`? But delay would also affect off-toggle — off doesn't change transform (only opacity dim on other elements; lines dim via parent .h1 opacity? I set h1 opacity? I listed kicker/sub/ctas/facts dims; h1 add too: body:not(.on) .h1{opacity:.55}). Then transition on .h1 opacity .45s — line span delays irrelevant. Good: keep delays on spans always (only triggered from boot state). Similarly reveal delays: define base transition + delay per element, but off-dim opacity changes would then also be delayed! e.g. .sub delay .42s → toggling off waits .42s — noticeable. Fix: put delay only while body.on? But the reveal transition happens when .on is ADDED — the transition properties in effect at that moment are from the new state (body.on) — yes! CSS transitions use the destination state's transition-* values. So define delays under body.on selectors; base (off) has delay 0. When removing .on (going off), destination state has delay 0 → instant. When adding .on, destination has delay → staggered. So: `body.on .sub{opacity:1; transition-delay:.42s}` and base `.sub{opacity:.55; transition:opacity .5s ease}` plus `.boot .sub{opacity:0!important}`. When .boot removed & .on added simultaneously: destination = body.on .sub (opacity 1 delay .42) → animates from current (0) after .42s ✓. h1 lines: base span transform 0; boot translateY(112%); body.on .line:nth... > span{transition-delay:.2s/.32s}. Base transition on spans always present. When on added, spans animate with delay ✓. Later off: transform unchanged (0), fine. figure: base transition opacity .8s ease .15s? figure appears once at boot: `.boot .figure{opacity:0; transform:translate3d(0,18px,0)}` `.figure{transition:opacity .8s ease .28s, transform .8s cubic .28s}` — but parallax overrides transform inline (JS sets style.transform, killing CSS transition target... inline style transform = destination; transition applies. But JS rAF updates every frame → transitions restart each frame? Changing inline transform each frame with a transition causes perpetual easing (smooth-ish laggy). Cleaner: separate concerns — parallax on .figure via CSS vars, reveal via opacity only + a wrapper for rise? Use: .figure{transition:opacity .8s ease .28s} .boot .figure{opacity:0}. Rise: skip translate (opacity + light surge is enough) — simpler, avoids conflict. Parallax then free on transform inline (no transition) with own lerp. Set .figure{will-change:transform}. Also apply parallax to readout/glow via CSS var trick: glows use --px/--py set on .figure. I'll set vars on figure element: figure.style.setProperty('--px', x+'px'); glows/hint use translate calc with var. Elements with base translate(-50%,-50%): .glow transforms as computed above. .sw also centered translate — give slight counter-move: transform:translate(calc(-50% + var(--px,0px)*.6), calc(-50% + var(--py,0px)*.5)). And .art svg: transform:translate(var(--px,0),var(--py,0)) — wait that duplicates figure's own parallax; if figure itself moves via inline transform, children inherit — so only move figure; glows inside figure also inherit... I want depth (different rates) → don't transform .figure; transform layers individually: - .art: translate(calc(var(--px)*1), calc(var(--py)*1)) - .glow: -1.5x - .sw & .state & .figcap & .readout & .dims: 1x (same as art) — or leave text static (only art+glows move) → text stays crisp. Nice: move .art and .glow only. So figure static; .art{transform:translate3d(var(--px,0),var(--py,0),0)} .glow uses calc(-50% + px*-1.5). vars inherit from .figure where JS sets. JS lerp writes vars each frame (desktop, non-reduced): ``` let tx=0,ty=0,cx=0,cy=0; window.addEventListener('pointermove',e=>{ if(!matchMedia('(hover:hover) and (pointer:fine)').matches) return; const r=? use viewport: tx=(e.clientX/innerWidth-.5)*14; ty=(e.clientY/innerHeight-.5)*12; }); function loop(){ cx+=(tx-cx)*.06; cy+=(ty-cy)*.06; fig.style.setProperty('--px',cx.toFixed(2)+'px'); ... requestAnimationFrame(loop)} ``` Guard reduced-motion: skip loop. Move direction: art moves +px (toward cursor slightly) and glow opposite → parallax depth. ok. Edge vertical text also maybe move? static. Enough. Write it all. For safety in the SVG: CSS custom props on strokes — transitions of stroke color work. Also text elements in SVG need pointer-events none (svg aria-hidden anyway) & user-select none. Let me also verify .current dash: stroke-dasharray:"0.1 10" hmm number 0.1 with round caps gives dots diameter=width 2.4 — spacing 10. flow keyframes to offset -40.4? Use -20.2 (2 periods) duration .55s. PathLength trick not needed. body:not(.on) .current{opacity:0}. marquee items count ~8 * ~150px ≈ 1300 per seq; two seqs 2600; speed 26s → 50px/s fine. Actually track width = 2 seq; translateX(-50%) loops ✓. Final check modal ids & handlers; write code. CSS length — fine. Also: the ".btn" hover arrow: .btn svg{transition:transform .25s} .btn:hover svg{transform:translate(2px,-2px)}. Btn hover also slight translateY(-1px) & shadow? subtle: box-shadow 0 6px 16px rgba(0,0,0,.12)? ok minimal. Ghost link style: .link-tel{font:500 14px var(--mono); color:var(--tx); border-bottom:1px solid var(--line-strong); padding-bottom:2px; transition:border-color .2s,color .2s} hover{border-color:var(--accent); color:var(--tx)} include small phone svg inline 13px. Include "24H" mini-tag next to hero tel? keep hero simple: "or call 0113 244 8068 — 24h". Header chip: .chip{font:600 8.5px mono; ls:.22em; padding:6px 10px; border:1px solid var(--line-strong); border-radius:999px; color:var(--tx-soft)} hover border-accent color tx. Content "24H CALLOUT". OK writing final. Also don't forget: body.on .hero::before{opacity:1} ; hero::before base opacity 0, transition 1s. Vignette hero::after base opacity 1? define: .hero::after{...opacity:1; transition:opacity .6s} body.on .hero::after{opacity:0}. But hero::after overlays content? z-index 1, content z 2. pointer-events none. Also grain body::after z 40 (below modal 90, above content) pointer-events none. Also off-state: readout & annotations colors via --tx-soft adapt automatically. figure plate brightness filter. Now the actual writing. I'll produce the code block. (Also remember: after code, short explanation; no mention of iframe; first-person taste comments minimal in reply text.) Let me draft the full file mentally-final: ```html Hardcastle Electrical — Electricians in Leeds

svg + txt
24H CALLOUT phone svg 0113 244 8068
HARDCASTLE ELECTRICAL LTD · COMPANY REG. 02318847 · LEEDS, ENGLAND

NICEIC Approved Contractor — Leeds & West Yorkshire

Power, done properly.

From full rewires to 3 a.m. callouts, we've kept Leeds wired safe since 1987 — fixed prices up front, tidy work, and every job certified to BS 7671.

or call 0113 244 8068 — 24h

FIG. 01Lighting circuit — ground floor

2.40 m

SUPPLY

0.0V~

0.00 Hz · LOAD 0.00 A

FLIP TO TEST

MAINS ISOLATED
- Est. 1987 — Leeds
- NICEIC approved
- Part P registered
- 12,400+ jobs signed off
- 4.9/5 from 312 reviews
Fixed-price quote

Request a callback

Tell us the job — a qualified electrician (not a call centre) rings you back within the hour, Mon–Sat.

Your namePlease tell us your name.

PhoneThat number doesn't look right.

Postcode

Job

No spam, no scripts — just a spark with a diary.

``` Wait: `.dims` has ::before/::after ticks; label span inside positioned. Let me restructure: .dims{left:68.5%;top:3%;height:28%;} label absolutely below? vertical text along line: place span at left:10px top:50% translateY(-50%). fine. CSS for .mark positioning: rocker relative; .mi{top:9px} .mo{bottom:9px}; centered via left:50% translateX(-50%). Slot: .slot? I named .rocker::before as slot? Use rocker::before{content:""; position:absolute; top:16px; left:50%; transform:translateX(-50%); width:18px; height:4px; border-radius:2px; background:#C9C2B0; box-shadow:inset 0 1px 2px rgba(0,0,0,.25); transition:.3s} body.on rocker::before{background:#FFAE1A; box-shadow:0 0 8px rgba(255,174,26,.85), 0 0 2px rgba(255,174,26,.9)}. Marks color: rgba(32,27,18,.4) with light text-shadow. State text: uppercase via CSS text-transform. figcap strong block + span block. Also add letter-spacing etc. Edge: writing-mode vertical-rl; transform:rotate(180deg); position absolute left:calc(clamp pad?) put left:18px; top:50% translateY? With rotate180, position: left:16px; bottom:24px; font mono 9px ls .25em; opacity .45; color var(--tx-soft). Height auto. hidden ≤1200px. Hmm edge inside .hero absolute; hero has overflow hidden ok. hero-in grid: `display:grid; grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr); align-items:center; gap:clamp(28px,5vw,72px); width:min(1280px,100%); margin-inline:auto; padding:clamp(16px,3vh,40px) clamp(20px,5vw,64px) 12px;` .facts{list-style:none; display:flex; flex-wrap:wrap; column-gap? use li+li::before margin} width min(1280,100%); margin:0 auto; padding: 14px clamp(20px,5vw,64px) 18px; border-top:1px solid var(--line); font mono 10.5px ls .16em uppercase color var(--tx-soft); li display:flex align center. Also max-width align: border across full width? border-top on inner width? Simpler: .facts{border-top:1px solid var(--line); margin:0 clamp(20px,5vw,64px); padding:14px 0 20px;} plus width auto. And hero bottom padding small. Actually also want a bottom hairline? marquee below provides edge. ok top border only. li+li::before{content:"/"; margin:0 18px; color:var(--accent); opacity:.9; font-weight:600} — li contains flex? just inline with ::before inline — fine with flex-wrap? ::before is inside li; for wrapped lines separator sticks with following item ✓ good. hero: display:flex; flex-direction:column; justify-content:center; flex:1; position:relative; overflow:hidden; padding-top:92px; (facts inside hero after hero-in, margin-top: clamp(24px,5vh,48px)). Let me set hero-in margin-top? handled by centering. h1 margin: 18px 0 20px. kicker margin-bottom:0 (h1 margin covers). sub margin-bottom:30px? .ctas margin-top:34px? set sub margin:0 0 8px; ctas margin-top:30px. Also .kicker{font:600 10.5px mono; ls .22em; uppercase; color:var(--tx); display:flex; align-items:center; gap:12px} ::before rule 26x2 accent. h1 color var(--tx). .off? all via vars. .btn-lg{padding:14px 22px; font-size:15px} .btn{display:inline-flex; align-items:center; gap:10px; background:var(--btn-bg); color:var(--btn-tx); border:0; border-radius:10px; font:600 15px var(--disp); letter-spacing:.01em; cursor:pointer; transition:background-color .22s, color .22s, transform .15s} .btn:hover{background:var(--accent); color:#221A08} .btn:active{transform:translateY(1px)} .btn-sm{padding:9px 15px; font-size:13.5px; border-radius:9px} .tel{display:inline-flex; align-items:center; gap:8px; font:500 13.5px mono; color:var(--tx); } svg 14 stroke currentColor. hover color accent. .chip:hover{border-color:var(--accent); color:var(--tx)}. head-in{max-width:1280px; margin:auto; display:flex; justify-content:space-between; align-items:center; padding:20px clamp(20px,5vw,64px);} header{position:absolute; top:0; left:0; right:0; z-index:20}. Marquee: .marquee{background:var(--mq-bg); color:var(--mq-tx); overflow:hidden; position:relative; z-index:5} .track{display:flex; width:max-content; animation:mq 30s linear infinite} .seq{display:flex; align-items:center} .mi{font:500 10.5px mono; ls:.18em; uppercase; padding:12px 0; white-space:nowrap; margin:0 26px} .sep{color:var(--accent); font:500 10.5px mono} body:not(.on){--mq-bg:#1D1810; --mq-tx:#8F8772} body.on{--mq-bg:#201B12; --mq-tx:#F0EADB}. body:not(.on) .track{animation-play-state:paused}. .marquee:hover .track{animation-play-state:paused}. @keyframes mq{to{transform:translateX(-50%)}} toasts: .toasts{position:fixed; left:20px; bottom:20px; z-index:120; display:flex; flex-direction:column; gap:10px} .toast{background:#1C1710; color:#F0EADB; border-left:3px solid #E8A013; padding:13px 18px; font:500 12px mono; ls:.04em; max-width:340px; border-radius:6px; box-shadow:0 12px 30px rgba(0,0,0,.25); animation:tin .3s ease} .toast.bye{opacity:0; transform:translateY(8px); transition:.35s} overlay: .overlay{position:fixed; inset:0; z-index:100; background:rgba(20,15,8,.55); backdrop-filter:blur(4px); display:grid; place-items:center; padding:20px; opacity:0; transition:opacity .22s} .overlay.show{opacity:1} .sheet{background:#FBF8F0; color:#201B12; width:min(460px,100%); border-radius:16px; padding:30px 30px 26px; position:relative; transform:translateY(14px); transition:transform .28s cubic-bezier(.2,.9,.25,1); box-shadow:0 30px 80px rgba(0,0,0,.35); border:1px solid rgba(32,27,18,.08)} .overlay.show .sheet{transform:none} .q-kick{font:600 9.5px mono; ls .24em; uppercase; color:#B07408; margin-bottom:10px} .sheet h3{font:700 26px disp; ls -.02em} .q-note{color:#6A6250; font-size:14px; lh 1.6; margin:10px 0 22px} form grid: .fld{display:flex; flex-direction:column; gap:7px; margin-bottom:16px} label{font:600 9.5px mono; ls:.18em; uppercase; color:#6A6250} input,select{background:transparent; border:0; border-bottom:1px solid rgba(32,27,18,.28); padding:9px 2px; font:500 15px disp; color:#201B12; border-radius:0; outline:none; transition:border-color .2s} focus{border-color:#D08A0B} select{appearance:none; background-image:url("data:image/svg+xml,chevron"); background-repeat:no-repeat; background-position:right 2px center; background-size:12px; padding-right:20px; cursor:pointer} .row{display:grid; grid-template-columns:1fr 1.4fr; gap:18px} .err{display:none; font:500 10.5px mono; color:#B23A18} .fld.bad .err{display:block} .fld.bad input{border-color:#B23A18} .full{width:100%; justify-content:center; margin-top:6px} .micro{font:500 10.5px mono; color:#8B8371; text-align:center; margin-top:14px; ls:.06em} .x{position:absolute; top:16px; right:16px; background:none; border:0; cursor:pointer; color:#6A6250; padding:8px; border-radius:8px} .x:hover{color:#201B12} .x svg{width:14px;height:14px; display:block} chevron data uri: `%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%236A6250' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E`. surge: .surge{position:fixed; inset:0; z-index:200; pointer-events:none; background:#FFD98E; mix-blend-mode:overlay; opacity:0} .surge.go{animation:strike .55s ease-out} grain: body::after{content:""; position:fixed; inset:0; z-index:90; pointer-events:none; opacity:.05; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")} body:not(.on)::after{opacity:.08} Hmm grain above content slightly texturizes everything incl. modal(90 vs modal 100? modal z100>90 crisp; keep modal above? grain over modal could be nice filmic but crisp form better: modal z 100, overlay 100 > 90 ✓ toast 120 ✓ surge 200.) Wait overlay default z: set .overlay z-index:100. sheet inside. Focus-visible global: :focus-visible{outline:2px solid var(--accent); outline-offset:3px; border-radius:2px} Selection: ::selection{background:#E8A013; color:#16120A} Body base: font-family var(--disp); background var(--bg); color var(--tx); transition background-color .55s ease, color .55s ease; min-height:100svh; display:flex; flex-direction:column; position:relative; overflow-x:hidden. :root vars: --disp:'Bricolage Grotesque',... ; --mono:'IBM Plex Mono',...; --accent:#E8A013; --accent-ink:#B07408 (for text-on-cream amber); --ok... body vars per state as planned. Also --btn-bg/--btn-tx/--mq-*/--line. Transitions on many elements for color: give broad: `.brand,.h1,.kicker,.sub,.ctas,.facts,.hero,.marquee,.figcap,.readout,.state,.hint,.dims,.sw-label{transition:...}` — manageable: define utility `.th{transition:...}`? Just add transition on specific elements individually with their other transitions. To keep simple: ``` .hero, .marquee, body { transition: background-color .55s, color .55s } .facts, .figcap span, .s-txt etc: stroke/fill transitions defined in art classes. ``` Text colors inherit from body color (transition on body color won't animate children? color is inherited — animating body color animates inherited color? Transitions animate the computed value on the element where specified; children inherit the animating value? Inherited properties: child's computed value = parent's current (animating) value each frame — yes, inherited color updates continuously during parent's transition. Good: put background+color transitions on body only; children using var(--tx) for borders — vars don't transition... vars swap instantly (custom props aren't interpolated unless registered). Elements with `color:var(--tx-soft)` change instantly while body bg fades — mismatch during .55s. Mitigate: add transition to those specific props: e.g. `.sub{transition:color .55s}` etc. Many places... define a shared rule: ``` .kicker,.sub,.facts,.brand,.hnav .tel,.chip,.sw-label,.figcap,.readout,.state,.hint,.dims,.dims-l,.h1,.b-txt strong,.b-txt em{transition:color .5s ease, opacity .5s ease, border-color .5s ease, background-color .5s ease} ``` plus body bg transition, marquee bg transition, art stroke transitions, line/border transitions for facts border-top: `.facts{transition:border-color .5s}` included via border-color in list (facts border top). .dims background transition. plate filter transition. rocker shadows transition. glass/fill/fil/current transitions. Good enough. Borders using var(--line) (header none). Also .line spans color inherits body ✓. Also h1 .pd{color:var(--accent); font-style:normal; font-family:var(--disp)}. em (Fraunces): font-family:'Fraunces',serif; font-style:italic; font-weight:480? use 500; font-size:.99em; letter-spacing:-.01em. Now JS final: ```js (()=> { const $=(s,c=document)=>c.querySelector(s); const body=document.body; const sw=$('#sw'), stateTxt=$('#stateTxt'), rVolt=$('#rVolt'), rSub=$('#rSub'); const track=$('#track'), seq=$('#seq'); const reduced=matchMedia('(prefers-reduced-motion: reduce)').matches; let on=false, nudged=false; // marquee const items=[...]; seq.innerHTML=items.map(t=>`${t}/`).join(''); track.appendChild(seq.cloneNode(true)); // audio let actx=null,nbuf=null; const audio=()=>{ try{ const AC=window.AudioContext||window.webkitAudioContext; if(!AC) return null; if(!actx){ actx=new AC(); const n=Math.floor(actx.sampleRate*.06); nbuf=actx.createBuffer(1,n,actx.sampleRate); const d=nbuf.getChannelData(0); for(let i=0;i
{ const c=audio(); if(!c) return; try{ const t=c.currentTime; const s=c.createBufferSource(); s.buffer=nbuf; const f=c.createBiquadFilter(); f.type='bandpass'; f.frequency.value=up?3200:2200; f.Q.value=1.1; const g=c.createGain(); g.gain.setValueAtTime(.4,t); g.gain.exponentialRampToValueAtTime(.0001,t+.06); s.connect(f); f.connect(g); g.connect(c.destination); s.start(t); s.stop(t+.07); const o=c.createOscillator(); o.type='sine'; o.frequency.setValueAtTime(up?170:130,t); o.frequency.exponentialRampToValueAtTime(55,t+.09); const g2=c.createGain(); g2.gain.setValueAtTime(.22,t); g2.gain.exponentialRampToValueAtTime(.0001,t+.12); o.connect(g2); g2.connect(c.destination); o.start(t); o.stop(t+.13); }catch(e){} }; const surge=$('#surge'); const strike=()=>{ if(reduced) return; surge.classList.remove('go'); void surge.offsetWidth; surge.classList.add('go'); }; function render(){ body.classList.toggle('on',on); sw.setAttribute('aria-pressed',String(on)); if(on){ stateTxt.textContent='LIVE · 230 V~'; rVolt.textContent='230.0'; rSub.textContent='50.00 Hz · LOAD 0.42 A'; } else { stateTxt.textContent='MAINS ISOLATED'; rVolt.textContent='0.0'; rSub.textContent='0.00 Hz · LOAD 0.00 A'; } } function power(v,strikeIt){ if(v===on) return; on=v; render(); clack(v); if(v){ if(strikeIt) strike(); if(!nudged){ nudged=true; if(!reduced) setTimeout(()=>{ body.classList.add('nudge'); setTimeout(()=>body.classList.remove('nudge'),750); },1700); } } } sw.addEventListener('click',()=>power(!on,true)); render(); // boot setTimeout(()=>{ body.classList.remove('boot'); power(true,!reduced); }, reduced?200:950); // mains jitter setInterval(()=>{ if(!on) return; rVolt.textContent=(229.55+Math.random()*.9).toFixed(1); rSub.textContent=`${(49.96+Math.random()*.08).toFixed(2)} Hz · LOAD ${(0.34+Math.random()*.16).toFixed(2)} A`; },800); // parallax const fig=$('#figure'); if(!reduced && matchMedia('(hover:hover) and (pointer:fine)').matches){ let tx=0,ty=0,cx=0,cy=0; addEventListener('pointermove',e=>{ tx=(e.clientX/innerWidth-.5)*16; ty=(e.clientY/innerHeight-.5)*14; }); const loop=()=>{ cx+=(tx-cx)*.055; cy+=(ty-cy)*.055; fig.style.setProperty('--px',cx.toFixed(2)+'px'); fig.style.setProperty('--py',cy.toFixed(2)+'px'); requestAnimationFrame(loop); }; loop(); } // modal const overlay=$('#overlay'), xBtn=$('#xBtn'), form=$('#qForm'); let lastTrigger=null; const openModal=e=>{ lastTrigger=e.currentTarget; overlay.hidden=false; requestAnimationFrame(()=>overlay.classList.add('show')); document.body.style.overflow='hidden'; setTimeout(()=>$('#inName').focus(),120); }; const closeModal=()=>{ overlay.classList.remove('show'); document.body.style.overflow=''; setTimeout(()=>{overlay.hidden=true; if(lastTrigger) lastTrigger.focus();},240); }; document.querySelectorAll('[data-quote]').forEach(b=>b.addEventListener('click',openModal)); xBtn.addEventListener('click',closeModal); overlay.addEventListener('click',e=>{ if(e.target===overlay) closeModal(); }); addEventListener('keydown',e=>{ if(e.key==='Escape'&&!overlay.hidden) closeModal(); }); // toast const toasts=$('#toasts'); const toast=msg=>{ const el=document.createElement('div'); el.className='toast'; el.textContent=msg; toasts.appendChild(el); setTimeout(()=>{ el.classList.add('bye'); setTimeout(()=>el.remove(),400); },4600); }; // form form.addEventListener('submit',e=>{ e.preventDefault(); const name=$('#inName').value.trim(), phone=$('#inPhone').value.replace(/\D/g,''); let ok=true; $('#fName').classList.toggle('bad', !(name.length>=2)); if(name.length<2) ok=false; $('#fPhone').classList.toggle('bad', !(phone.length>=10)); if(phone.length<10) ok=false; if(!ok) return; const first=name.split(/\s+/)[0]; closeModal(); form.reset(); toast(`Cheers ${first} — we've pencilled you in. Expect a ring within the hour.`); }); // clear error on input ['inName','inPhone'].forEach((id,i)=>{ ... simpler: $('#inName').addEventListener('input',()=>$('#fName').classList.remove('bad')); same phone }); })(); ``` Field wrapper ids: fName, fPhone (I wrote fPhone earlier in markup? I wrote id="fName"? earlier markup used fPhone — align: use fName & fPhone). Wait markup above had id="fName"? I wrote `id="fName"`? earlier draft: `
` — yes set both. Escape close when hidden check: overlay.hidden false check ok. Also on openModal using e.currentTarget — addEventListener with openModal(e) fine. Modal markup ids align. Also `nudge` keyframes transform conflicts with rocker base transform rotateX(9deg) — body.on .rocker transform rotateX(9deg); animation overrides during play ✓. Rocker transition: transform .12s cubic-bezier(.34,1.8,.4,1) — spring snap. Also box-shadow .12s. body.on .rocker: rotateX(9deg); shadows pressed-top. default .rocker: rotateX(-9deg). Hmm wait check: OFF should look "out" (default). The visible difference: press states. Fine. plate perspective: .plate{perspective:140px} child rocker transformed. Also .sw:focus-visible .plate outline? global focus-visible on button gives outline around whole button incl label — ok. Also disable tap highlight: -webkit-tap-highlight-color transparent. Also cursor: pointer on .sw; add title? no. Figure annotations font stacks: use var(--mono) in CSS classes: `.figcap,.readout .r-label,.r-sub,.state,.hint,.sw-label,.dims-l{font-family:var(--mono)}` individually set sizes. r-val uses disp. Also ensure .figure text not selectable: user-select:none on .figure. Let me also reconsider state label position vs plate bottom: plate center y=73.1% of 640 = 468; plate 92 tall → bottom = 468+46=514 → 80.3%. state top 85% (544) ✓ gap 30px. hint top: plate top=422 (66%); hint at top:53% (339) height ~55 → bottom 394; gap to plate 28 ✓. hint left:1% width ~120 → plate left edge=118-46=72 → arrow at hint right (~120?) hmm hint left 1% of 460 = 4.6px + width 120 → 125 overlaps plate horizontally at y<422 — plate top 422, hint bottom 394 — no vertical overlap ✓. Readout top 36% = 230; bulb circle spans y 214–302 x 206–294; readout left 66% = 303.6 — right of bulb ✓ no overlap. Readout height ~90 → ends 320 near base tip x250 — fine. dims left 68.5%=315; spans top 3% (19) height 28% (179) → y19–198 ✓ matches cord 26–214 roughly ✓ label at left calc(68.5% + 9px). figcap at top-left 0,0 — svg top has rose at x234 — clear. Corner crop marks: add via .figure::before/::after? Need 4 corners — use two pseudos with border tricks on wrapper + 2 spans? Add spans .cm tl/tr/bl/br: 10x10 border-left/top etc. I'll add 4 small spans class="cm" with modifier positions. CSS: ``` .cm{position:absolute; width:12px; height:12px; border:0 solid var(--line-strong2? use rgba tx .4)} .cm.tl{top:-1px;left:-1px;border-top-width:1.5px;border-left-width:1.5px} etc. ``` Define --crop: color-mix? use var(--tx) with opacity via rgba? Use `border-color:var(--crop)` where body.on --crop: rgba(32,27,18,.5); off: rgba(207,198,175,.4). Add var. Alright — also add these transitions? minor. Also .figure maybe add subtle background? none. I also want the bulb & switch composition anchored nicely: figure justify-self:end; add margin-right slight? grid gap handles. Double-check `.hero-in` on mobile: figure centered below copy; also add margin-top. And h1 clamp min 2.5rem. Also very short screens (laptop 700h): 52vh clamp keeps figure ≤ 364*1.39=506 ✓. Potential issue: `.hero` overflow hidden + sticky? fine. Also the surge overlay mix-blend overlay on dark bg at opacity .5 lightens nicely; on light bg gives warm bloom ✓. Also when user toggles OFF: no strike; clack lower; glows fade (transition on .glow opacity .6s? base .glow transition: opacity .7s ease; body.on adds opacity 1 — on removal fades .7s? transition defined base .7s applies both ways ✓). Bulb glass fill transition .4s. Current opacity .4s. Readout instantly zeros — add tiny delay? fine. Also marquee pause: body:not(.on) .track{animation-play-state:paused} ✓ and hover pause — combine specificity: `body:not(.on) .track, .marquee:hover .track{animation-play-state:paused}`. I think ready. Also small: `html{scroll-behavior:smooth}`. Also add `@media (max-width:1100px){.edge{display:none}}`. Mobile hero-in: `@media (max-width:900px){ .hero-in{grid-template-columns:1fr; gap:40px} .figure{justify-self:center; width:min(86vw,380px); margin-top:6px} .hero{padding-top:104px} }` and maybe center copy? Keep left-aligned (editorial). facts font ok. @media (max-width:560px){ .num{display:none} .row{grid-template-columns:1fr} .dims,.dims-l{display:none} .hint{left:0; top:55%} h1 clamp already; .readout{left:64%; top:35%} .facts li{margin? fine} .ctas{flex-direction:column; align-items:flex-start; gap:16px} } — ctas: display:flex; align-items:center; gap:22px; wrap. Also tel hero link `white-space:nowrap`? allow wrap. Header on ≤560: hide chip? keep chip, hide number: `.tel .num{display:none}`? Then icon-only tel ambiguous; instead hide .chip and keep number. Do: `@media(max-width:640px){.chip{display:none}}` and `.tel span.num` keep. ok. Also brand em small might wrap — fine. Let me finalize hint arrow svg: ``` .hp{stroke:var(--tx-soft); stroke-width:1.4; stroke-linecap:round; fill:none} ``` Place after text; container width 120; arrow margin-left:auto? Actually arrow should point from text toward plate down-right: text at top-left of block, arrow below-right. `.hint svg{align-self:flex-start; margin-left:38px; margin-top:2px}`. Arrow tip near (36+?) — plate at left 25.7% (~118px in 460 fig) top 66%. Hint at left:1%, top:53% → in px (460 fig): x≈5, y≈339. Arrow drawn at x≈43..81 (margin-left 38 + svg x 3..36), y≈ 339+ text 14 + 2 + svg y 3..27 ≈ 358..382. Plate top-left corner ≈ (72,422). Arrow tip (81,382) — pointing down-right toward plate ✓ good enough visually. "FLIP TO TEST" width: 9px mono ls .18em ≈ 11 chars*~7px=77+ls≈ 90px ✓. Also state .sdot 5px. r-val id rVolt inside span; small "V~". Also give .r-val small mono 11. Also `.readout{max-width:34%}`? no need. Edge case: figure width min(100%, clamp(...)) — in grid column .88fr with max 1280 container minus padding: column ~ (1280-128)*(0.88/2)... fine. Now — the h1 lines reveal: `.line{display:block; overflow:hidden; padding:0.06em 0 0.02em? }` clipping descenders? "Power," comma descends? comma sits low but within em box; line-height .98 with overflow hidden may clip "y" in "properly" descender! "properly" has y descender — with line-height .98 and overflow hidden, descender might clip. Fix: .line{padding-bottom:.08em; margin-bottom:-.08em} to give clip room below while keeping rhythm. And padding-top:.04em; margin-top:-.04em. I'll add that. Also em italic Fraunces within line — descender of "p" fine with padding. Fraunces italic at heavy? weight 520. OK, also font for r-val number: Bricolage 600 30px tabular? fine. Write final answer now. Also brief post-code explanation: concept (UK rocker switch, lights on/off state, figure 01 schematic), interactions list, and notes (fonts/CDN, no images). Keep concise. Double check: no external JS libs; single file; Google Fonts only CDN. All good. One more: marquee sep span inside cloned seq ✓ loop seamless since both seq identical width; track width max-content; translateX(-50%) moves exactly one seq ✓ (two children equal width). Also .seq must not shrink: flex none: .seq{flex:none}. Let me now also dial h1 exact: font-size:clamp(3rem, 6.5vw + .5rem, 5.4rem)? At 1440: 6.5*14.4+8=101px ~ 6.3rem capped 5.4rem=86px nice. At 375: 6.5*3.75+8=32+? calc: 6.5vw=24.4px +8 = 32.4px → below 3rem floor=48px → 48px. Good. Line 2 with em: "done properly." total maybe wraps on mobile? At 48px "done properly." ~ 14 chars * .55em ≈ 370px > 360 viewport minus padding... could overflow. Reduce mobile clamp floor to 2.6rem (41.6px): 14*.5*41.6≈ 291 + spacing ok. Set clamp(2.55rem, 8.5vw, 5.4rem)? At 1440 8.5vw=122 cap 86 ✓; at 768: 65px; "done properly." 14 chars*.52*65≈473 vs container 768-40 ✓. At 390: 8.5vw=33 → floor 40.8 → 14*.52*40.8≈297 ✓ within ~350. Good: clamp(2.55rem, 8.5vw, 5.4rem). Also letter-spacing -.03em tight. kicker 10.5px might be small on mobile fine. Sub width 46ch. hero-in grid columns: 1.08fr .92fr. Copy container maybe max-width 560. Also add `.hero-in{align-items:center}`. Also for large screens figure shouldn't hug edge: justify-self:end ok within container. Now produce it. Also last check on art stroke var names: define in CSS: .art uses currentColor? Simpler: .art{color:var(--tx)} and strokes use stroke="currentColor" attributes! Then transitions: .art *{transition:stroke .45s, fill .45s} and body.on .art{color:var(--tx)} — but tx changes with body state anyway; currentColor picks up var transitions? currentColor resolves from inherited color which transitions on... .art color: set .art{color:var(--tx); transition:color .5s}. children stroke=currentColor inherit resolved color (animating ✓). fills: s-fill uses fill="currentColor" with class for opacity? Glass fill special rgba. Let me set explicit attributes: - .s-line elements: stroke="currentColor" stroke-width via CSS class or attribute. I'll put presentation attrs in markup (stroke-width etc.) and colors via currentColor; CSS handles .glass fill & .fil special & .current. glass: fill via CSS class transitions fill .45s; base fill rgba(255,255,255,.05); body.on fill rgba(255,206,110,.28). stroke="currentColor". fil: stroke:#FFAE1A when on else var(--tx-soft): set CSS .fil{stroke:var(--tx-soft); transition:stroke .4s, stroke-width .4s, filter .4s} body.on .fil{stroke:#FFAE1A; ...}. stroke-width attr 2. shine: stroke currentColor opacity .35 attr. s-txt fill: currentColor? then text same color as lines — want softer: set class .s-txt{fill:var(--tx-soft); transition:fill .45s; font:500 8.5px var(--mono); letter-spacing:.14em}. s-fill (dots/rose): fill currentColor. current path: CSS class .current{stroke:var(--accent); ...}. Rose rect s-fill fill currentColor — a filled dark rose; maybe outline nicer: make rose .s-line2 (stroke, fill none). I'll outline rose: rect stroke currentColor fill none rx4. And contact dot filled. current dashes visible only on; but also under-plate start hidden by plate? Plate is DOM above svg ✓ covers line start. Also line from rose to cord: cord line class s-line. Also bulb glass stroke currentColor ✓. Now the readout big number uses Bricolage — tabular? ok. Also hero overflow hidden might cut glow.h (100% of figure) — fine intended bleed? glow.h extends to figure edges only; wash via hero::before covers room. OK. Also add slight rotation to figure? no. Also `body.on .hero::before{opacity:1}` and default hero::before{opacity:0; transition:opacity 1.1s ease .05s}. Vignette: .hero::after{background:radial-gradient(130% 100% at 50% 36%, transparent 42%, rgba(8,6,3,.42) 100%); opacity:1; transition:opacity .7s} body.on .hero::after{opacity:0}. Both pseudos pointer-events none, z-index:1; .hero-in,.facts{position:relative;z-index:2}. Edge z 2. Great — write it. Also double check contrast of accent amber on cream for kicker rule & separators — decorative ✓; state live text ink ✓; r-label soft ✓. Also the ".pd" period accent amber on cream — decorative punctuation, ok. Also mobile: state/hint/readout scale — set @media 560: .readout .r-val font 24px; hint font 8px. I'm confident. Compose final message: short intro sentence (I'll keep it 1-2 lines, first person, no heading start), code block, then explanation section with a few bullets. Must not start with '#'. Start with plain text intro. Let me write the complete code without truncation. Careful with quotes inside data URIs in CSS: use double quotes for url("...") and single quotes/%23 inside. Also the noise rect fill default black — turbulence filter output colored? feTurbulence produces RGBA noise; rect filtered shows colorful noise; commonly adds feColorMatrix to desaturate: add `
`? Color noise at .05 opacity fine but colored specks may look odd; add saturate 0 for mono grain: include in filter after turbulence. Yes add. Also grain over dark bg: black noise invisible; grain mostly darkens — on dark it's subtle; use mix-blend-mode:overlay for grain so it adds texture both ways? blend overlay on body::after with opacity .06: grayscale noise overlay → adds contrast texture. Set mix-blend-mode:overlay. ok. Final check rocker marks: .mark{position:absolute; left:50%; transform:translateX(-50%); font:600 9px var(--mono); color:rgba(32,27,18,.42); text-shadow:0 1px 0 rgba(255,255,255,.5)} .mi{top:8px} .mo{bottom:8px}. Slot ::before top:17px — mark I at 8px above slot ok. Rocker height = plate 92 - padding 14 = 78. ok. body.on plate brightness full; also maybe plate slight warm tint when on? keep. Also .sw hover: .sw:hover .rocker{box-shadow ... + brightness?} add filter:brightness(1.03) on hover plate. nudge only defined under body.on? keyframes fine globally; animation applied via body.nudge .rocker. Also aria: switch label includes state? aria-pressed conveys. Also prevent double-tap zoom on switch: touch-action:manipulation. Write everything now. Also JS: guard elements exist. Counting done — produce final. Here's my take: instead of a stock "tradesman hero", I built the whole section around one idea — **the lights themselves**. The page boots up dark, then a proper UK-style rocker switch "energises" the room (warm light, a lit pendant on a schematic lighting circuit, live voltage readout), and you can flip it off and on yourself — complete with a synthesized mechanical *clack*. ```html Hardcastle Electrical — Electricians in Leeds

HardcastleElectricians · Leeds
24H CALLOUT 0113 244 8068
NICEIC Approved Contractor — Leeds & West Yorkshire

Power, done properly.

From full rewires to 3 a.m. callouts, we've kept Leeds wired safe since 1987 — fixed prices up front, tidy work, and every job certified to BS 7671.

or call 0113 244 8068 — 24h

FIG. 01 Lighting circuit — ground floor

2.40 m

Supply

0.0V~

0.00 Hz · LOAD 0.00 A

FLIP TO TEST

MAINS ISOLATED

Est. 1987 — Leeds

NICEIC approved

Part P registered

12,400+ jobs signed off

4.9/5 from 312 reviews
Fixed-price quote

Request a callback

Tell us the job — a qualified electrician (not a call centre) rings you back within the hour, Mon–Sat.

Your name Please tell us your name.

Phone That number doesn't look quite right.

Postcode

Job

No spam, no scripts — just a spark with a diary.

``` **How it's built, briefly:** - **The concept — a working light circuit.** The signature moment is the CSS-built UK rocker switch (spring-tilt on `rotateX`, I/O engraving, an indicator window that lights up). The page has two full states: *off* (dark, vignette, "MAINS ISOLATED") and *on* (warm bone paper, a lit pendant bulb, a soft room wash). On load it boots dark, then flicks on with a brief tube-strike surge and a staggered headline reveal. - **FIG. 01.** The right side is a hand-drawn SVG schematic — ceiling rose, cord, bulb, filament, fuse, earth symbol — with amber "current" dots flowing along the copper when live, and a voltage readout that jitters around 230.0 V like a real meter. The whole figure drifts subtly with your cursor. - **Sound & feel.** The switch *clack* is synthesized with the Web Audio API (filtered noise burst + low thump) — it only ever starts after a user click, and respects `prefers-reduced-motion`. - **Everything is wired.** Both "quote" buttons open a custom modal with inline validation; submitting raises a toast (no browser alerts). Phone numbers are real `tel:` links, the marquee pauses on hover and loses power when the mains is off. - **Type & palette.** Bricolage Grotesque for display, IBM Plex Mono for the spec-sheet annotations, Fraunces italic for one word of the headline; ink on bone with a single electric amber accent and a faint SVG paper grain. Drop it in an `.html` file and flip the switch a few times — the off state is half the fun.

build a really beautiful hero section for a uk electrician c...