* {
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
}

#board {
  width: 280px;
  min-height: 450px;
  border-radius: 10%;
  padding: 0 20px 20px 20px;
  text-align: center;
  background-color: grey;
  color: white;
}

h1 {
  padding-top: 12px;
}

h2 {
  margin: 8px;
}

table {
  margin: auto;
  border-spacing: 8px;
}

button {
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  background-color: #6e072d;
  border-color: #6e6e6e;
  color: white;
}

.game-square {
  font-size: 50px;
  width: 70px;
  height: 70px;
  vertical-align: top;
}

.game-square:disabled {
  cursor: default;
}

#restart-button {
  display: none;
  font-size: 24px;
  padding: 12px;
  margin: 12px auto;
}