/* Reset and base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(to bottom right, #a18cd1, #fbc2eb);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  /* Container */
  .game-container {
    background-color: #ffffffcc;
    padding: 2rem;
    border-radius: 1.5rem;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
    animation: fadeIn 1s ease-in-out;
  }
  
  /* Title */
  #title {
    font-size: 2.5rem;
    color: #222;
    margin-bottom: 1.2rem;
    font-weight: bold;
    animation: pulse 2s infinite;
  }
  
  /* Scoreboard */
  .scoreboard {
    display: flex;
    justify-content: space-around;
    font-size: 1.2rem;
    margin-bottom: 2rem;
    font-weight: 500;
    color: #333;
  }
  
  /* Board grid */
  .board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    gap: 15px;
    justify-content: center;
    animation: slideUp 1s ease-out;
  }
  
  .cell {
    width: 100px;
    height: 100px;
    background-color: #fff;
    border-radius: 0.75rem;
    font-size: 2rem;
    font-weight: bold;
    color: #3b3b3b;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.3s;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    user-select: none;
  }
  
  .cell:hover {
    background-color: #e1e1e1;
    transform: scale(1.05);
  }
  
  .cell.played-x {
    color: #ff3c3c;
    animation: pop 0.3s ease-in-out;
  }
  
  .cell.played-o {
    color: #0077ff;
    animation: pop 0.3s ease-in-out;
  }
  
  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
  }
  
  @keyframes pulse {
    0%, 100% { color: #333; }
    50% { color: #ff3c3c; }
  }
  
  @keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }
  
  @keyframes pop {
    0% { transform: scale(0.7); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
  }