# Fix copied CSS that looks wrong

> Fix copied HTML and CSS that renders differently. Check stylesheet loading, inherited values, custom properties, parent layout and pseudo-elements.

Canonical page: https://sitepeel.dev/guides/copied-css-not-working/

The missing piece is often outside the selected element: an inherited font, a custom property, its parent layout or another rule in the cascade. Compare the source and destination before adding overrides.

## First confirm the stylesheet actually loads

Open your page through a development server and inspect the stylesheet request. Check the URL, response status and returned content. A path that worked beside the original HTML file may point somewhere else after you move the component. A successful page response is not proof that its CSS loaded.

Next, inspect a distinctive rule on the target element. If the rule does not appear at all, check the selector, stylesheet inclusion and build output. If it appears crossed out or replaced, investigate the competing rule. This separates a delivery problem from a cascade problem before you start changing values.

## Compare resolved values, not just one rule block

The Styles panel can show declarations from several rules. The final appearance depends on the cascade, inherited properties and the current state. A copied rule block may omit values supplied by a parent, a reset or a custom property defined elsewhere.

The read-only getComputedStyle() API exposes resolved CSS values for a selected element. Compare a small set of relevant properties in the source and your version. A computed snapshot helps diagnose the difference, but it does not describe every breakpoint, interaction or relationship that produced it.

Example: inspect-style.js

```
// Replace .example-card with the element you are inspecting.
const element = document.querySelector(".example-card");
if (element) {
  const style = getComputedStyle(element);
  console.table(Object.fromEntries([
    "display", "width", "box-sizing", "font-family",
    "font-size", "line-height", "padding", "gap", "color"
  ].map(property => [property, style.getPropertyValue(property)])));
}
```

## Inspect the parent and its inherited context

A card may rely on its parent to define a grid column, provide an inherited font or establish the containing block for an absolutely positioned badge. Moving the card into a plain container changes those relationships even if the card’s own declarations remain identical.

Look for custom properties used by the copied rules. Check where they are defined and what they resolve to in the destination. Give the component the values it needs through a clear local or shared contract. Avoid importing an entire unrelated website stylesheet just to restore one missing variable.

- Compare the parent’s display, dimensions and positioning.
- Check inherited typography and text color.
- Resolve the custom properties referenced by the component.
- Inspect ::before and ::after when decorative content is missing.
- Compare the same hover, focus and viewport state.

## Rebuild a small, self-contained component

Once you understand the dependencies, decide which belong in the component and which belong in the page layout. For example, a card can own its padding and border while the surrounding grid owns the number of columns. Making that boundary explicit is more maintainable than freezing every measured width into pixels.

Sitepeel’s element export can give you a useful starting reference. Test that reference inside your project’s actual layout and review its assets, fonts and generated structure. Keep the styling you need, then replace page-specific assumptions with the project’s existing tokens and components.

## Check more than the original viewport

Use a longer heading, remove an optional image and narrow the container. These checks reveal whether the copied component only matched one convenient screenshot. Check keyboard focus as well as hover, and make sure a badge or decorative pseudo-element does not obscure important text.

If the result still differs, compare one group of properties at a time: layout, typography, spacing, then decoration. Avoid adding !important to every declaration. It can hide the conflict while leaving the underlying dependency unresolved, making the next change harder to understand.

## Further reading

- [Reddit: copying an element’s CSS does not reproduce its appearance](https://www.reddit.com/r/webdev/comments/od51nu/how_do_i_copy_all_the_css_for_an_element/)
- [MDN: resolved values from getComputedStyle()](https://developer.mozilla.org/en-US/docs/Web/API/Window/getComputedStyle)
- [MDN: CSS inheritance](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Cascade/Inheritance)

## Related pages

- [HTML & CSS extractor](https://sitepeel.dev/html-css-extractor/index.md): Pick a website element and inspect its HTML and CSS. Preview, copy or save a button, card or section with Sitepeel’s browser tools.
- [Copy HTML and CSS](https://sitepeel.dev/guides/copy-html-css-from-website/index.md): Select the right website element, copy its HTML and CSS, then resolve fonts, assets and layout dependencies in your own project.
- [Fix fonts that look different](https://sitepeel.dev/guides/fonts-look-different-in-browsers/index.md): Troubleshoot a website font that looks wrong across devices. Compare viewport settings, loaded font files, weights, fallback fonts and text spacing.