body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f4;
}

#board {
  display: grid;
  grid-template-columns: repeat(7, 60px);
  grid-template-rows: repeat(6, 60px);
  gap: 8px;
  background-color: #0044cc;
  padding: 15px;
  width: max-content;
  margin: 20px auto;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.cell {
  width: 60px;
  height: 60px;
  background-color: white;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.3s;
}

.red {
  background-color: #ff3333;
}

.yellow {
  background-color: #ffcc00;
}

.reset-btn {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: #333;
  color: white;
  border: none;
  border-radius: 5px;
}