body {
    background-image: url("../gfx/blur-background07b.jpg");
    font-family: 'PT Sans', sans-serif;
}
.jumbotron {
    background: none;
}
.table-striped>tbody>tr:nth-of-type(even) {
    background-color: #ffffff;
}
.vertical-center {
  min-height: 100%;  /* Fallback for browsers do NOT support vh unit */
  min-height: 100vh; /* These two lines are counted as one :-)       */
  
  display: flex;
  align-items: center;
}