body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: #f5f7fa;
}

h1 {
  margin-top: 20px;
}

#board-container {
  position: relative;
  width: 320px;
  margin: 20px auto;
}

#board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  gap: 10px;
}

.cell {
  width: 100px;
  height: 100px;
  background: white;
  border-radius: 10px;
  font-size: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: 0.2s;
}

.cell:hover {
  background: #e3f2fd;
}

#scoreboard {
  display: flex;
  justify-content: center;
  gap: 30px;
  font-weight: bold;
}

/* WINNING LINE */
#win-line {
  position: absolute;
  width: 0;
  height: 5px;
  background: red;
  top: 0;
  left: 0;
  transform-origin: left center;
  transition: 0.4s ease;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  background: #4CAF50;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}