body {
  font-family: Arial, sans-serif;
  background: #0f1422;
  color: #e8eef7;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

h1 { margin-bottom: 10px; }

.game-mode {
  margin-bottom: 15px;
  display: flex;
  gap: 20px;
}

.game-mode label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 16px;
  cursor: pointer;
}

.game-mode input[type="radio"] {
  margin: 0;
}

#status {
  margin-bottom: 15px;
  font-size: 18px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 80px);
  gap: 5px;
}

.cell {
  width: 80px;
  height: 80px;
  background: #121826;
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  cursor: pointer;
  border-radius: 6px;
}

.cell.taken { cursor: not-allowed; }
.board.disabled { pointer-events: none; }

.controls { margin-top: 20px; }
button {
  padding: 8px 16px;
  border: none;
  background: linear-gradient(135deg,#00e08a,#42ffd1);
  color: #012116;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
}