feat(core): update shadows styles

[waterplea]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows Conventional Commits
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Refactoring
• Code style update
• Build or CI related changes
• Documentation content changes

What is the current behavior?

Closes #

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

[lumberjack-bot]

Pull request was closed ✔️

All saved screenshots (for current PR) were deleted 🗑️

[bundlemon]

BundleMon

Files updated (1)

Status	Path	Size	Limits
✅	demo/browser/main.(hash).js	319.38KB (+125B +0.04%)	+10%

Unchanged files (4)

Status	Path	Size	Limits
✅	demo/browser/vendor.(hash).js	205.38KB	+10%
✅	demo/browser/runtime.(hash).js	34.13KB	+10%
✅	demo/browser/polyfills.(hash).js	19.92KB	+10%
✅	demo/browser/scripts.(hash).js	14.92KB	+10%

Total files change +124B +0.02%

Groups updated (1)

Status	Path	Size	Limits
✅	demo/browser/*..js	2.18MB (+176B +0.01%)	-

Final result: ✅

View report in BundleMon website ➡️

---

Current branch size history | Target branch size history

[github-actions]

Visit the preview URL for this PR (updated for commit 796af7f):

https://taiga-ui--pr2933-shadows-0qf7hgq5.web.app

_{(expires Fri, 21 Oct 2022 13:35:37 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: 4b5ece1e114386f6a105425ef799091475b249eb}

[codecov]

Codecov Report

Base: 69.02% // Head: 69.02% // No change to project coverage 👍

Coverage data is based on head (796af7f) compared to base (3a14454).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2933   +/-   ##
=======================================
  Coverage   69.02%   69.02%           
=======================================
  Files        1086     1086           
  Lines       13024    13024           
  Branches     1797     1797           
=======================================
  Hits         8990     8990           
  Misses       3727     3727           
  Partials      307      307           

Flag	Coverage Δ
addon-charts	72.48% <ø> (ø)
addon-doc	48.38% <ø> (ø)
addon-editor	53.20% <ø> (ø)
addon-mobile	61.68% <ø> (ø)
addon-table	64.06% <ø> (ø)
addon-tablebars	98.07% <ø> (ø)
cdk	∅ <ø> (∅)
core	76.30% <ø> (ø)
kit	73.68% <ø> (ø)
summary	69.02% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[well-done-bot]