javascript - Checkable groupbox element for HTML form - Stack Overflow
springshare on Twitter: "For the #WFH to-do list: Add an alert box to your #LibGuides. HTML/CSS know-how is needed, but it's attractive and easy w/ Bootstrap! Learn how in the Dec newsletter
Box model
Images in PeopleSoft Fluid UI - PeopleTools Tech Tips
box-sizing | CSS-Tricks - CSS-Tricks
Layout and the containing block - CSS: Cascading Style Sheets | MDN