[UI] Improve responsiveness of dash-tangle decorative element on smaller screens

## Description I noticed a responsiveness/layout issue with the `.dash-tangle` decorative element on smaller screen widths. The mobile media query currently uses a very large width and negative `right` offset, which can cause clipping and inconsistent off-screen rendering on smaller devices. ## Current Behavior * Decorative element is pushed too far off-screen on smaller widths * Partial clipping/inconsistent positioning may occur ## Proposed Fix * Reduce excessive negative `right` offset * Adjust width slightly for better responsiveness ## Environment * Tested locally using the Layer5 docs development server * Browser: Chrome --- #### Contributor Guide and Resources - 📚 [Instructions for contributing to documentation](https://github.com/layer5io/docs/blob/master/CONTRIBUTING.md) - Layer5 documentation [site](https://docs.layer5.io) and [source](https://github.com/layer5io/docs/) - 🎨 Wireframes and [designs for Layer5 site](https://www.figma.com/file/5ZwEkSJwUPitURD59YHMEN/Layer5-Designs) in Figma [(open invite)](https://www.figma.com/team_invite/redeem/GvB8SudhEOoq3JOvoLaoMs) - 🙋🏾🙋🏼 Questions: [Layer5 Discussion Forum](https://discuss.layer5.io) and [Layer5 Community Slack](http://slack.layer5.io)