Green Acres Farmers Market wants a decorative background image to sit behind everything else on a positioned banner, without touching the other elements’ z-index values. What’s a valid way to do that?

Anchor Point Law Firm’s developer isn’t sure whether `justify-content` should be written on the flex container itself or on each individual flex item inside it. Where does it actually belong?

A brewery’s developer needs to write a rule specifically for the moment a nav link is actively being clicked, distinct from just being hovered or focused. Which pseudo-class matches that moment?

A developer notices that padding is added on top of an element’s declared width by default, making boxes bigger than their declared width once padding is included. Is that default relationship between padding and width fixed permanently in CSS, or something that can be changed with the right property?

A developer saves the same photograph as both a JPEG and a PNG and is surprised the PNG version is noticeably larger.

A student needs photos for a class project and doesn’t have a budget for stock photography.

A designer creates a simple two-color animated icon and a separate, richly colored animated banner with smooth gradients, planning to save both as GIFs.

A demo lets a user drag a slider that changes the simulated browser font size, while comparing one element with px padding to another with rem padding. What should the user observe about the px-padded element as the slider moves?

A flower shop wants its nav’s hover-triggered background color change to feel smooth rather than sudden. Which property, applied to the link’s background-color, achieves that per the deck’s example?

A student on a Linux laptop wants a full desktop image editor they can install for free, without relying on a browser tab.