table {
            width: 100%;
            border-collapse: collapse;
            font-family: Arial, sans-serif;
            font-size: 12px;
        }
        th, td {
            border: 1px solid #ccc;
            padding: 4px;
            text-align: center;
        }
        th {
            background-color: #00aaff;
            color: white;
        }
        td.gray {
            background-color: #999999;
        }
        td.blank {
            background-color: #ffffff;
        }
        td.header {
            background-color: #a7e0f3;
            font-weight: bold;
        }