CSS

General

• CSS Guidelines (2.2.5) - High-level advice and guidelines for writing sane, manageable, scalable CSS
• The 30 CSS Selectors You Must Memorize
• How to Create a Text Outline in CSS - WPShout
• CSS · Bootstrap
• TACHYONS - Css Toolkit
• BYO Positioning Responsive Grid System
• CSS Colors
• CSS Grid — Learn all about CSS Grid with Wes Bos in this free video series!
• CSS Diner - Where we feast on CSS Selectors!

Cheat Sheets

• CSS Cheat Sheet
• HTML color codes and names
• Front-End-Design Resources - Google Sheets
• 📙 Emojipedia — 😃 Home of Emoji Meanings 💁👌🎍😍

How-To's

• css - Media Queries: How to target desktop, tablet, and mobile? - Stack Overflow
• Useful :nth-child Recipes | CSS-Tricks - CSS-Tricks
• Line Clampin' (Truncating Multiple Line Text) | CSS-Tricks - CSS-Tricks
• Force Element To Self-Clear its Children | CSS-Tricks
• 4 reasons your z-index isn't working (and how to fix it) - Coder Coder
• Simple Styles for <hr>'s

Fonts

• Google Fonts
• Axis-Praxis: New font: Selawik Variations by Microsoft

Flexbox

• A Complete Guide to Flexbox | CSS-Tricks
• Flexbox Tutorial | HTML & CSS Is Hard
• Flexbox Froggy - A game for learning CSS flexbox
• thomaspark/flexboxfroggy: A game for learning CSS flexbox 🐸

Transform Tricks

• A Trick: Individual CSS Transform Functions

Libraries

• Basic Use | Font Awesome
• circle | Font Awesome
• Icon Library | Font Awesome

Animations

• CSS Animations tips and tricks - CSS: Cascading Style Sheets | MDN
• animation-fill-mode - CSS: Cascading Style Sheets | MDN
• animation | CSS-Tricks
• ease-out, in; ease-in, out | CSS-Tricks
• Easing Functions Cheat Sheet
• <timing-function> - CSS: Cascading Style Sheets | MDN
• transition-timing-function - CSS: Cascading Style Sheets | MDN
• Bézier curve - MDN Web Docs Glossary: Definitions of Web-related terms | MDN

Colors/Images/Assets

• 15 Minimalist Color Palettes to Jump Start Your Creative Business — Jordan Prindle Designs | Creative Brand and Squarespace Designer for Entrepreneurs
• google webfonts helper

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Icons

• Github Logo - Free social media icons
• Linkedin logo - Free social icons
• Facebook - Free social media icons
• Instagram - Free social media icons
• Free vector icons - SVG, PSD, PNG, EPS & Icon Font - Thousands of free icons
• Wirecons Free Vector Icons icons by Timothy Miller

SVGs

• Scaling inline SVG: CSS & other sadnesses by Taylor Hunt on CodePen