body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: #0884a3;
  color: rgb(0, 0, 0);
}
h1 {
  margin-bottom: 20px;
}
.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 5px;
}
.cell {
  width: 100px;
  height: 100px;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  cursor: pointer;
  border: 2px solid #0ff;
  transition: background-color 0.2s;
}
.cell:hover {
  background: #950c0c;
}
.winner {
  margin-top: 20px;
  font-size: 1.2rem;
  color: #0f0;
}
button {
  margin-top: 15px;
  padding: 10px 20px;
  border: none;
  background: #0ff;
  color: #0c0202;
  font-size: 1rem;
  cursor: pointer;
  border-radius: 5px;
}
button:hover {
  background: #0cc;
}

@media (max-width: 768px) {
  body {
    padding-top: 60px;
  }

  .neon-btn {
    font-size: 16px;
    padding: 12px 24px;
    letter-spacing: 1px;
  }
}

@media (max-width: 480px) {
  .neon-btn {
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 6px;
  }
}