This needs to be done: The value of the box-shadow property should be set to 25px for offset-x, 10px for offset-y, 0 for blur-radius, 0 for spread-radius, and finally blue for the color.
You have set up the offset-x and offset-y but not the blur-radius and spread-radius.
This is the structure it is explained for box-shadow in the instruction, now apply the correct values, there are no separate properties as you mentioned. And add the color in the end as you have done it.