body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  flex-direction: column; 
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1f1f1f, #3a3a3a);
  color: #eee;
}

.container {
  text-align: center;
  margin-bottom: 40px;
}

h2 {
  margin-bottom: 20px;
  font-size: 2rem;
}

.controls {
  margin-bottom: 20px;
}

select {
  padding: 5px 10px;
  font-size: 1rem;
  border-radius: 5px;
  border: none;
  background-color: #444;
  color: #eee;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 8px;
}

.cell {
  width: 100px;
  height: 100px;
  font-size: 2.5rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(145deg, #2a2a2a, #1f1f1f);
  color: #eee;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.cell:hover {
  transform: scale(1.05);
  box-shadow: 0 0 10px #888;
}

.cell.X {
  color: #e7e7e7; /* green to player*/
}

.cell.O {
  color: #636363; /* red to bot */
}



footer {
  padding: 15px 20px;
  background: linear-gradient(135deg, #2a2a2a, #1f1f1f);
  color: #bbb;
  font-size: 0.85rem;
  text-align: center;
  border-radius: 10px;
  max-width: 500px;
  line-height: 1.4;
}

footer strong {
  color: #eee;
}