table {
      border-collapse: collapse;
      width: 60%;
      margin: 20px;
    }
    th, td {
      border: 1px solid #888;
      padding: 8px;
      text-align: center;
    }
    th {
      background-color: #f2f2f2;
    }
     time_h, time_d {
      border: 1px solid #888;
      padding: 8px;
      text-align: center;
    }
    time_h{
      background-color: #f2f2f2;
    }