body {
  height: 100vh;
  background-color: gray;
}
.cell {
  width: 75px;
  height: 75px;
  border: 2px solid;
  box-shadow: 0 0 0 2px;
  line-height: 75px;
  font-size: 70px;
  cursor: pointer;
}
#Container {
  font-family: "Permanent Marker", cursive;
  text-align: center;
}
#cells {
  display: grid;
  grid-template-columns: repeat(3, auto);
  width: 225px;
  margin: auto;
}
#restartBtn {
  background: red;
  width: 200px;
  height: 50px;
  border: none;
  border-radius: 10px;
  color: white;
  font-size: 20px;
  transition: 0.5s;
  cursor: pointer;
}
#restartBtn:hover {
  background-color: rgb(187, 0, 0);
  border: 1px solid black;
}