header, footer {
    background-color: rgb(169, 130, 130);
    color: white;
    margin: 10px;
}

header h1 {
    margin: 0;
    font-weight: 100;
}


.HolyGrail {
    display: flex;
    height: 100%; /* 1, 3 */
    flex-direction: column;
  }
  
  .HolyGrail-header,
  .HolyGrail-footer {
    flex: none; /* 2 */
  }
  
  .HolyGrail-body {
    display: flex;
    flex: 1 0 auto; /* 2 */
    flex-direction: column;
    padding: 10px;
  }
  
  .HolyGrail-content {
    margin-top: 10px;
    max-width: 1000px;
  }
  
  .HolyGrail-nav {
    order: -1;
  }

  .HolyGrail-ads {
    order: 2;
  }

.section_h {
  color: rgb(169, 130, 130);
  
}

hr.section {
  margin-block-start: -0.8em;
}
  
  header,
  footer,
  .HolyGrail-nav,
  .HolyGrail-ads {
    padding: 1em;
    border-radius: 3px;
  }

  .HolyGrail-nav,
  .HolyGrail-ads {
    background: rgba(147, 128, 108, 0.1);
  }
  
@media screen and (min-width: 500px) {
    .HolyGrail-body {
      flex-direction: row;
    }
    .HolyGrail-content {
      flex: 1, 1, auto;
      padding: 0 50px;
      margin: 0;
    }
    .HolyGrail-nav, .HolyGrail-ads {
      flex: 1 1 12em;
    }
  }