body {
    padding: 20px;
}

thead tr th {
    text-align: center; 
    position: sticky;
    top: 0;
}

td {
    align-items: center;
    text-align: center;
}

.aircraft {
    font-weight: bold;
    vertical-align: middle;
  }

.table-responsive { 
    height:500px;
    overflow:scroll;
}

.tt {
    font-size: 14px;
}