* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Courier New", Courier, monospace;
  display: flex;
  justify-content: center; /* horizontal center */
  align-items: center; /* vertical center */
  height: 100vh; /* need this for center vertically */
}

.box {
  border: 2px solid black;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  width: 25rem;
  height: 15rem;

  background-color: darkolivegreen;
  color: white;
}

button {
  padding: 4px;
  color: darkseagreen;
  color: black;
}