body{background:#1e1e2f;color:#fff;font-family:'Inter',sans-serif;margin:0;padding:0}
.container{max-width:600px;margin:0 auto;padding:20px;text-align:center}
.board{display:grid;grid-template-columns:repeat(3,100px);gap:5px;margin:20px auto}
.cell{width:100px;height:100px;background:#292b39;display:flex;align-items:center;justify-content:center;font-size:2.5rem;cursor:pointer;transition:background .2s}
.cell:hover{background:#3a3c4e}
.hidden{display:none}
.scoreboard{margin-top:20px}
.scoreboard table{width:100%;border-collapse:collapse}
.scoreboard th,.scoreboard td{padding:8px;border-bottom:1px solid #444}
.start-screen input{padding:10px;margin:5px;border:none;border-radius:5px;width:80%}
.start-screen button{padding:10px 20px;background:#ff9f43;border:none;color:#1e1e2f;border-radius:5px;font-weight:bold;cursor:pointer}
.start-screen button:hover{background:#ffc163}