bg-green-100
: Sets a light green background.
border
: Applies a default 1px solid border.
border-green-400
: Sets the border color to a medium green.
text-green-700
: Sets the text color to a dark green, ensuring good contrast.
px-4
: Adds horizontal padding.
py-3
: Adds vertical padding.
rounded
: Applies rounded corners.
relative
: (Optional, but often useful for positioning icons or close buttons).