body{margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#74abe2,#5563de);color:#333}.container{max-width:800px;margin:0 auto;padding:20px;text-align:center}h1{margin-bottom:20px;color:#fff}.card{background-color:#fff;padding:20px;margin-bottom:20px;border-radius:8px;box-shadow:0 4px 8px #0000001a}#player-setup input{padding:10px;margin:5px;border:1px solid #ccc;border-radius:4px;width:200px}#player-setup button{padding:10px 20px;margin-top:10px;border:none;background-color:#5563de;color:#fff;border-radius:4px;cursor:pointer;font-size:1em;transition:background-color .3s}#player-setup button:hover{background-color:#3f4eb8}#board{display:grid;grid-template-columns:repeat(3,100px);grid-gap:10px;justify-content:center;margin:20px auto}.cell{width:100px;height:100px;background-color:#e9e9e9;display:flex;align-items:center;justify-content:center;font-size:2.5em;border-radius:4px;cursor:pointer;transition:background-color .3s,transform .2s}.cell:hover{background-color:#d0d0d0;transform:scale(1.05)}#game-status{font-size:1.2em;margin-top:15px;min-height:1.5em}#restart-game{margin-top:15px;padding:10px 20px;font-size:1em;background-color:#5563de;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s}#restart-game:hover{background-color:#3f4eb8}#leaderboard,#achievements{text-align:left}#leaderboard ul,#achievements ul{list-style:none;padding:0}#leaderboard li,#achievements li{padding:5px 0;border-bottom:1px solid #f0f0f0}.hidden{display:none}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal.hidden{display:none}.modal-content{background:#fff;padding:20px;border-radius:8px;text-align:center;animation:popup .5s ease-out;position:relative}@keyframes popup{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.confetti{position:absolute;width:10px;height:10px;background-color:gold;animation:confettiFall 2s linear infinite;opacity:.8}@keyframes confettiFall{0%{transform:translateY(-20px) rotate(0);opacity:1}to{transform:translateY(150px) rotate(360deg);opacity:0}}