What are CSS Grid Layout areas?

`grid-template-areas` defines named grid areas within a grid container. It uses a string to assign names to specific grid cells. For example, `grid-template-areas: 'header header' 'sidebar content' 'footer footer';` creates a layout with named regions.

`justify-content` aligns flex items along the main axis. Values include `flex-start`, `flex-end`, `center`, `space-between`, and `space-around`. For example, `justify-content: space-between;` distributes items with equal space between them and no space at the ends.

`align-items` aligns flex items along the cross axis. Values include `flex-start`, `flex-end`, `center`, `baseline`, and `stretch`. For example, `align-items: center;` vertically centers items within the flex container.

Use `position: sticky;` along with `top`, `right`, `bottom`, or `left` to create a sticky element that toggles between `relative` and `fixed` positioning based on scroll position. For example, `position: sticky; top: 0;` keeps the element at the top of its container as you scroll.

CSS Grid Layout areas are named regions in a grid. Defined with `grid-template-areas`, they simplify the placement of grid items. For example, `grid-template-areas: 'header header' 'main sidebar' 'footer footer';` organizes content into distinct sections.