html, body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f0f4f8;
}

.gameboard {
    display: none;
    grid-template-columns: repeat(3, 150px);
    grid-template-rows: repeat(3, 150px);
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
}

button {
    background-color: #2563eb;
    color: #ffffff;
}

button:hover {
  background-color: #1e40af;
}

.cell {
  width: 150px;
  height: 150px;
  border: 2px solid #d3dce6;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: bold;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease;
  color: #ffffff;
}

.cell.X {
  color: #3b82f6;
}

.cell.O {
  color: #ef4444;
}

.button_row {
    display: none;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.scoreboard {
    display: none;
    color: #1e293b;
    justify-content: center;
    align-items: center;
    gap: 10px;
}