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CSS & Frontend Bug Fixing

Your layout is broken. We inspect, fix, ship.

Broken layouts, a mobile horizontal scroll, modals stuck behind content, a failing LESS/SCSS build, stale CSS that keeps serving the old styles. We open it in the element inspector, find the root cause, and ship a verified fix across every breakpoint and browser.

  • Under-4h first response on Emergency
  • Zero horizontal scroll at 320–390px — verified
  • Tested in 5 browsers incl. real iOS Safari
Fixed price from $99 Confirm before we close it
  • < 4h First reproduce

    On Emergency tier we open the failing layout in DevTools and confirm the broken rule within four hours of access.

  • 0px Mobile overflow

    We close the fix only when the page has zero horizontal scroll at 320, 375 and 390 px — verified, not eyeballed.

  • < 0.1 Target CLS

    Layout-shift fixes ship with a before/after Lighthouse CLS reading so you can see the green move.

  • 5 Browsers tested

    Every fix is checked in Chrome, Safari, Firefox, Edge and real iOS Safari before we call it done.

Common bugs we fix

The frontend bugs we see every week

Real symptoms with real causes. If yours is on this list we have fixed it many times — for stubborn cases see our JavaScript bug fixing and Hyvä theme bug fixing pages.

  • Broken layout & overlapping elements

    Cards stacking on top of each other, a footer climbing into the content, a grid that collapses to one column. Usually a stray position: absolute, a wrong flex-basis, or a float that never cleared. We diff the computed box model and rebuild the container.

  • Horizontal scroll / overflow on mobile

    That 10px sideways scroll on phones. We hunt the offender (a fixed width: 600px, a 100vw that ignores the scrollbar, an unbroken long URL) and clamp it with min-width: 0 and overflow-wrap so 320–390 px is dead-flat.

  • z-index stacking — modal/header behind content

    A sticky header sliding under product cards, a modal trapped behind the page, a dropdown clipped by overflow: hidden. We map the stacking contexts (transforms and opacity create new ones) and set a sane z-index scale instead of a 99999 arms race.

  • LESS / SCSS compile failure

    A build that dies on variable @x is undefined or a nested-& selector that compiles to a doubled ancestor and never matches. We fix the source, recompile clean and confirm the rule actually lands in the served CSS.

  • Stale CSS after static-content:deploy (Magento)

    You edited the LESS, deployed, and the old styles keep serving. The cause is a reused var/view_preprocessed cache or a poisoned CDN URL. We wipe the right folders, force a clean setup:static-content:deploy -f, and version-bust the reference.

  • Cross-browser break (Safari / iOS)

    Looks perfect in Chrome, falls apart in Safari: 100vh jumping with the toolbar, gap in flexbox, backdrop-filter or sticky positioning ignored, date inputs styled wrong. We add the right fallbacks and prefixes so iOS matches desktop.

How we fix it

Report → Reproduce → Root-cause → Fix → Verify

No !important band-aids. We fix the source and verify the result before we close the ticket. Need it tied into a wider speed pass? See Magento performance optimization.

  1. 01

    Report the bug

    You send the URL, a screenshot or screen-recording, the device/browser it breaks on, and any console or compile error. Two minutes via the form below.

    Minute 0
  2. 02

    Reproduce in DevTools

    We open the page in the element inspector, toggle the responsive viewport, and reproduce the broken state on the exact viewport and browser you reported.

    Hour 1
  3. 03

    Find the root cause

    We isolate the offending rule, stacking context or compile error — not just the symptom. You get a one-paragraph diagnosis in plain English before we change anything.

    Same day
  4. 04

    Fix + responsive QA

    We patch the CSS/LESS/SCSS at the source, then re-check 320–1440 px and five browsers. No !important band-aids, no copy-paste overrides that rot later.

    24–48h
  5. 05

    Deploy + verify live

    We deploy, clear the static/CDN cache so the new CSS actually serves, and send before/after screenshots plus a Lighthouse CLS reading. You confirm before we close it.

    On approval
Pricing

Fixed prices. You approve before we start.

All work billed at a transparent $25/hr basis. You get a fixed-price quote before any code changes — never a silent hourly meter.

  • Quick Fix

    $ 99 USD

    ~4h @ $25/hr · one well-defined CSS bug · 24–48h

    Best for: A single, clearly described frontend bug — one overflow, one broken layout, one z-index clash

    • One reproducible CSS / layout bug
    • Root-cause diagnosis in plain English
    • Responsive QA at 320 / 375 / 390 / 768 / 1440 px
    • Cross-browser check (Chrome, Safari, Firefox, Edge)
    • Before/after screenshots on approval
    • Turnaround 24–48 hours
    Fix one bug
  • Emergency / Retainer

    Custom

    Under-4h SLA · 24/7 on-call · ongoing frontend cover

    Best for: A storefront looking broken in production right now, or a store that wants a frontend on standby

    • Under-4-hour first-response SLA
    • 24/7 on-call for production frontend breaks
    • Includes a $2,499 stabilization sprint (~100h @ $25/hr) option
    • Monthly retainer for continuous CSS / theme cover
    • Priority queue ahead of fixed-fee work
    • Direct Slack / WhatsApp channel
    Get an SLA quote

Prices in USD. Quotes in GBP / EUR / AUD / INR on request. For a store down in production right now, start with the emergency bug-fixing hub for the fastest SLA.

Report your bug

Send us the broken page

Takes 2 minutes. Add a screenshot or screen-recording and the device it breaks on — we reply with a diagnosis and quote.

We will get back to you shortly.

What clients say

Stores we’ve un-broken

Five-star average across Upwork, Clutch and direct referrals. Real fixes, real stores.

Brilliant freelancer.

Brilliant freelancer. He is the best Magento 2 freelancer I have ever worked with. So good and

PS

Peter Stewart

CEO, No79 Design

Excellent developer.

Excellent developer. Helped us get to where we needed to be and fixed the problems i a fast period of time. Very

D

Darren

CEO, Ocean Telecom

As an American, I was hesitant to hire someone from a different country and culture.

As an American, I was hesitant to hire someone from a different country and culture. Kishan changed my mind. He was very cooperative, easy to work with, and is very bright. He gets things done fast and efficiently, and is available when needed. His English is excellent and is...

DS

Danielle Siso

Real good guy.

Real good guy. Where others quoted 10 hours minimum, he did it within 3. All very neat, clear secure and great communication. A+

PV

Pieter Van Hees

Business Branding

Kishan did an outstanding job building my Ayurvedic consultation website, complete with product integration.

Kishan did an outstanding job building my Ayurvedic consultation website, complete with product integration. The entire process was seamless, and he was incredibly attentive to my specific business needs. His professionalism and expertise were evident, providing excellent...

SM

Simran Mahendraker

HH Formulations

Kishan was great to work with.

Kishan was great to work with. I needed a small change to my site, with an attribute adding to appear on the frontend. Kishan completed this very quickly, and had the work completed the same day. I am very happy with the work completed by Kishan and would be happy to employ his...

CK

Chanette Kennedy

Fixing frontends for stores in

  • United States
  • United Kingdom
  • Canada
  • Australia
  • Germany
  • France
  • Netherlands
  • India
FAQ

CSS bug-fixing questions, answered straight

How much does it cost to fix a CSS or frontend bug?

A single, well-defined CSS bug starts at $99 (~4h @ $25/hr) with 24–48h turnaround. A batch of bugs, or one deep root-cause with regression hardening, is the $499 Bug-Fix Sprint (~20h @ $25/hr). A storefront broken in production right now uses the Emergency / Retainer tier with an under-4-hour first response and a $2,499 stabilization sprint (~100h @ $25/hr) option. You get a fixed-price quote before any work starts.

How fast can you fix a broken layout?

On the Emergency tier we reproduce the broken layout in DevTools within four hours of getting access, and most single-bug fixes ship the same day to 48 hours. A simple overflow or z-index clash is often fixed in a few hours; a tangled root-cause across many breakpoints takes longer because we fix the source rather than papering over it with !important.

Why does my store have a horizontal scroll on mobile, and can you fix it?

That sideways scroll on phones is almost always one element wider than the viewport — a fixed width: 600px, a 100vw that ignores the scrollbar, an image with no max-width: 100%, or a long unbroken string. We find the offender in DevTools, clamp it with min-width: 0, max-width: 100% and overflow-wrap: anywhere, then confirm zero horizontal scroll at 320, 375 and 390 px. Yes, this is one of the most common fixes we ship.

My modal / sticky header is hidden behind other content. What causes that?

It is a stacking-context problem, not just a low z-index. A parent with transform, opacity < 1, filter or will-change creates a new stacking context that traps its children — so your z-index: 99999 still loses. We map the stacking contexts on the page and set a sane z-index scale (header, dropdown, modal, toast) instead of fighting it with bigger and bigger numbers.

My LESS / SCSS build is failing. Can you fix the compile error?

Yes. Typical causes: an undefined variable (variable @x is undefined), a missing import path, a bad mixin call, or a nested-& selector that compiles to a doubled ancestor and silently never matches. We fix the source, recompile clean, and — importantly — confirm the rule actually lands in the served CSS, not just the build output.

I deployed CSS changes on Magento but the old styles keep serving. Why?

The new CSS compiled, but a cache is serving the old file. On Magento that is usually a reused var/view_preprocessed directory, a stale pub/static/frontend theme folder, or a CDN that cached the old URL. The fix: wipe pub/static/frontend/<theme> and the matching var/view_preprocessed first, run setup:static-content:deploy -f so it does not reuse the cache, then version-bust the reference if a CDN is in front. We do all of this and verify the new bytes are served.

Can you fix layout shift (CLS) hurting my Core Web Vitals?

Yes. Cumulative Layout Shift comes from elements that load without reserved space — images and iframes with no width/height or aspect-ratio, web fonts that reflow text, banners and ads injected above the fold, or late-loading CSS. We reserve space, set font-display sensibly, and ship a before/after Lighthouse CLS reading so you can see the green move toward the < 0.1 target.

My site looks fine in Chrome but breaks in Safari / on iPhone. Why?

Safari and iOS handle a few things differently: 100vh changes as the toolbar shows/hides, flexbox gap needed a fallback on older versions, backdrop-filter needs the -webkit- prefix, sticky positioning and :has() behave differently, and form inputs are styled hard. We reproduce on real iOS Safari (not just a resized desktop window) and add the right fallbacks and prefixes so the page matches Chrome.

My store looks broken after a theme or plugin update. Can you fix it without rolling back?

Usually yes. After an update, breakage comes from changed markup or class names, a CSS specificity war between the new theme and your overrides, or a dropped/renamed asset. We diff what changed, rebuild your overrides against the new structure, and fix it forward — so you keep the update and your design. Rolling back is the last resort, not the first move.

Do you work on my live store or on staging?

Staging whenever one exists — we reproduce, fix and QA there, then deploy the verified change to live. If there is no staging, we work safely on live: small, reversible commits, a backup of the touched files, and changes scoped to the broken page. For an Emergency on a live store with no staging, we can spin up a quick local mirror of the frontend to fix without risk.

What access do you need to fix a frontend bug?

To start, just the URL of the broken page, a screenshot or screen-recording, and the device/browser it breaks on — we can often diagnose the root cause from that alone. To ship the fix we need access to the theme files (Git, SFTP or admin), or a staging environment. For Magento we also like read access to the CLI so we can run the static-content deploy and cache clears properly.

Is there a guarantee on the fix?

Yes. We only close a bug after you confirm the before/after on the exact device and browser you reported. If the same bug comes back because of our change, we fix it again at no charge. Every fix is verified across 320–1440 px and five browsers before we send it, and we patch the root cause — not a band-aid that rots on the next deploy. Need ongoing cover? The emergency bug-fixing retainer keeps a frontend on standby.

Stop staring at the broken page.

Send us the URL and a screenshot. We’ll inspect it, tell you what’s wrong, and ship the fix.

Report your bug