body{font-family:Arial,sans-serif;background:#f3f3f3;text-align:center}#top{display:flex;justify-content:center;gap:30px;font-weight:bold}table{border-collapse:collapse;margin:15px auto}td{border:1px solid #666;width:42px;height:42px}tr:nth-child(3) td,tr:nth-child(6) td{border-bottom:3px solid #000}td:nth-child(3),td:nth-child(6){border-right:3px solid #000}input{width:100%;height:100%;border:0;text-align:center;font-size:22px}input[readonly]{background:#ddd;font-weight:bold}.sel{background:#ffe082!important}.hl{background:#fff9c4!important}#pad{display:grid;grid-template-columns:repeat(9,40px);gap:5px;justify-content:center;margin:12px}.bar button,#pad button{padding:8px 10px}