game.css

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

body {
  height: 100vh;
  width: 100vw;
}

main {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  height: 100vh;
}

button {
  background-color: white;
  font-size: 2rem;
  border: solid black 1px;
}

img {
  width: 12.5vh;
  pointer-events: none;
}

.win-container {
  grid-column: 2/4;
  grid-row: 2/4;

  background-color: green;
  display: none;
  border: black solid 1px;
  flex-direction: column;

  text-transform: uppercase;
  font-family: roboto;
  color: white;
  justify-content: center;
  align-items: center;
  font-size: 10vmin;
}

.play-again {
  background: #a00;
  color: white;
  padding: 0.5rem;
  font-family: roboto;
  text-transform: uppercase;
  border: 1px black solid;
}