Super Tic Tac Toe 5x5 Game Vs Bot

Build a polished, playable Super Tic Tac Toe game in one HTML file. It's a 5x5 board where the first player to get 4 in a row wins: across, down or diagonally. You play against a bot with three levels. Easy makes mistakes, Medium plays solid, and Hard searches ahead with minimax and alpha-beta pruning. The game has animated marks, a winning-line effect, sound, undo, a saved score, keyboard controls, and light and dark themes. It works on phones and desktops, with no libraries needed.