body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #121212;
  color: white;
}

.game-container {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 500px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
}


.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 5px;
  margin: 20px auto;
}

.cell {
  width: 100px;
  height: 100px;
  background-color: #1e1e1e;
  border: 2px solid #00eaff;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 48px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.cell:hover {
  background-color: #333;
}

.status {
  font-size: 24px;
  margin: 20px 0;
}

#reset {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #00eaff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

#reset:hover {
  background-color: #00b3d4;
}

#fullscreen-button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #FFD700;
  color: black;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 20px;
  transition: background-color 0.3s;
}

#fullscreen-button:hover {
  background-color: #FFC700;
}

:fullscreen .game-container,
:-webkit-full-screen .game-container,
:-ms-fullscreen .game-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
}

:fullscreen #fullscreen-button,
:-webkit-full-screen #fullscreen-button,
:-ms-fullscreen #fullscreen-button {
  margin-bottom: 20px;
}