.minesweeper{display:flex;flex-direction:column;align-items:center;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.game-box-container{width:460px;text-align:center}.board{display:grid;grid-template-columns:repeat(auto-fill,40px);gap:4px}.cell{width:40px;height:40px;background-color:#bdbdbd;border:2px solid #9e9e9e;display:flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer;-webkit-user-select:none;user-select:none;font-weight:700}.cell.revealed{background-color:#e0e0e0;border:2px solid #ccc;cursor:default}.cell.mine{background-color:#bdbdbd;color:red}body{margin:0;font-family:sans-serif;background-color:#fff;color:#222}.app-container{display:flex;flex-direction:column;align-items:center}.app-header{width:100%;background-color:#4682b4;padding:10px;text-align:center;font-weight:700;font-size:1.5em;color:#1a1a5c;margin-top:0}.welcome-box{border:1px solid #333;padding:20px;background-color:#6b88a3;margin-top:40px;text-align:center;width:400px;border-radius:5px}.instructions{background-color:#ddd;padding:10px;text-align:left;margin:10px 0}.start-btn{background-color:#a2c4db;padding:10px 30px;border:1px solid #444;border-radius:4px;cursor:pointer;margin:2%}.game-box{background-color:#6b88a3;padding:10px;border-radius:4px}.game-box-header{display:flex;justify-content:flex-end;gap:5px;margin-bottom:5px}