css - how to create top left and bottom right border with different color? - Stack Overflow
CSS Box Model explained
CSS Border | o7planning.org
CSS Border Left | Learn the Working of CSS Border Left with Examples
html - how to give input border left and right small length - Stack Overflow
CSS Border Left | Learn the Working of CSS Border Left with Examples
CSS border-left-color Property
Wes Bos on Twitter: "🔥 You can use new CSS logical properties instead of top/bottom/left/right. Makes designing multi-language websites much easier when the flow direction changes. CSS Grid and Flexbox already setup
Set border-left to 1px solid crimson; in HTML and CSS
html - CSS how to make a perfectly alligned left (or right) border? - Stack Overflow