<style>
.box {
  display: flex;
  width: 200px;
  height: 200px;
  outline: 1px solid green;
  background-color: white;
  padding: 0px;
  margin: 0px;
  border: none;
  font-family: Ahem;
  font-size: 10px;
  color: green;
  border-radius: 0px;
}
</style>
<input class=box type=button value="center">
<button class=box>top left</button>