https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values/sign
sign() CSS function - CSS | MDN
The sign() CSS function contains one calculation, and returns -1 if the numeric value of the argument is negative, +1 if the numeric value of the argument is...
css functionsignmdn
https://docs.classicpress.net/reference/functions/wp_get_custom_css/
wp_get_custom_css() | Function | ClassicPress Documentation
Fetches the saved Custom CSS content for rendering.
custom csswpgetfunctionclassicpress
https://www.w3schools.com/csSref/func_rotatez.php
CSS rotateZ() function
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and...
cssfunction
https://www.code-generator.net/examples/index.cfm?example=css/functions/radial-gradient_function_positioning
CSS Example: Radial-Gradient Function Positioning
Free code example for your website. CSS Example: Radial-Gradient Function Positioning .
cssexampleradialgradientfunction
https://www.educative.io/courses/complete-beginner-guide-css/calculations-in-css
Understanding Calculations in CSS with the calc Function
Learn how to use the CSS calc() function to perform calculations, mix units, and control element sizes and positions in web design.
understandingcalculationscssfunction