How can I place a card center page?

I want to place this card in center of page. How can I do that?

.ion-grid {
margin-top: 50%;
I hope your problem will be fixed.
Thank you.

I I pasted it in css but it hasn’t worked

share your code here

Try this

  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;

P.S you could share your code as @flycoders_sourav stated to make it easier for others to help you.