Freebie: Google Material Design Shadow Helper | by Florian Kutschera | Medium
mixin for `box-shadow` is missing · Issue #518 · thoughtbot/bourbon · GitHub
Sass mixin material box shadow from all sides of element | Tutorials - Codeorum.com
Material Design Box Shadow
material-shadow.scss
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CSS Circle Border Radius Gradient Mixin Box Shadow - CSS CodeLab
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What is wrong with my box-shadow SASS @Mixin? - Stack Overflow
CSS box-shadow support / sciter
box-shadow @mixin is conflicting with Bootstrap's box-shadow @mixin · Issue #2622 · snapappointments/bootstrap-select · GitHub
box-shadow inset problem · Issue #13 · matthieua/sass-css3-mixins · GitHub
An Introduction to CSS Preprocessing - Speaker Deck
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An Introduction to CSS Preprocessing - Speaker Deck
Mario written in CSS? Successfully broke the box-shadow~ - Code World
css box shadow color on white background Code Example
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Undefined mixin 'box-shadow' · Issue #63 · ejholmes/active_admin_editor · GitHub
Getting Deep Into Shadows | CSS-Tricks - CSS-Tricks
Layered box-shadows via Sass mixin
