Techniques For Overcoming Poor CSS Support In Email — Smashing Magazine
CSS custom properties in box-shadow color function render incorrectly in Safari - Stack Overflow
A Close Look at CSS Box Shadow - WebFX
html - Why does box-shadow look different than filter: drop-shadow - Stack Overflow
Your Guide to Bulletproof Email Buttons that Work - Litmus
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Inner Shadows in CSS: Images, Text and Beyond | Design Shack
GitHub - bbutler522/Email-Box-Shadow-Alternative: A straightforward and seemingly cross-browser solution to add a psuedo box-shadow to HTML Emails
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Drop Shadows for HTML Email
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Breaking down CSS Box Shadow vs. Drop Shadow | CSS-Tricks - CSS-Tricks
Enhance the Styling of your Emails with CSS | SAP Blogs
Techniques For Overcoming Poor CSS Support In Email — Smashing Magazine
How To Add Realism With CSS Box Shadow And Text Shadow - Vanseo Design
Implementing Emails in 2021: Rounded Buttons in Outlook | Kontent.ai.
Using the Shadow Tool - Mail Designer – Create HTML email newsletters
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Add Shadows with CSS box-shadow Property | Juixe Techknow
A Close Look at CSS Box Shadow - WebFX
