Practical CSS position task: there are three elements (blue, green, red) with specified styles. You need to describe how the position of the blue element will change when different values of position and offsets (relative, left/top, absolute, transform on the parent) are added.

Let's consider how the position of the blue element changes with different values of the CSS position property and offsets:

• position: static (default) — the element is in the normal document flow. The top, left properties do not affect it.

• position: relative + left/top — the blue element remains in its place in the flow but is visually shifted relative to its original position by the specified left and top values. The space under the element is preserved.

• position: absolute — the element is taken out of the normal flow and positioned relative to the nearest ancestor with a positioning context (not static). If the parent has position: relative, then the left, top offsets are calculated from the parent's borders. If the parent has position: static, then from the browser window.

• transform on the parent — if the parent has a CSS transform property (e.g., transform: translate(...)), then for an absolutely positioned descendant, the parent becomes the positioning context. This affects the calculation of left, top offsets for the absolute element.

Thus, adding position: relative and offsets will shift the blue element relative to its original position but will not change the flow. position: absolute will take the element out of the flow and allow it to be positioned relative to the nearest positioned ancestor. The presence of transform on the parent creates a new context for absolute positioning.