What does CSS stand for?
AnswerCascading Style Sheets
CSS controls the look of HTML pages.
Coding · Facts & stats
CSS facts & stats
7 fact-checked facts about CSS and styling web pages, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which symbol selects an element by its id in CSS?
Answer#
#header selects the element with id 'header'.
Going deeper
In the CSS box model, what sits between the content and the border?
AnswerPadding
Padding is space inside the border; margin is outside.
Which declaration turns an element into a flex container?
Answerdisplay: flex
display: flex enables flexbox for its children.
Which CSS unit is relative to the root element's font size?
Answerrem
rem stands for 'root em'.
Expert level
Which property controls the stacking order of positioned elements?
Answerz-index
Higher z-index values appear on top.
What does position: sticky do?
AnswerActs like relative positioning until a scroll threshold, then sticks in place
Sticky elements stick once the scroll position reaches the offset.
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