html,
body,
header,
#intro {
    height: 100%;
}

#intro {
    background: url("TGW_background.jpg")no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.top-nav-collapse {
    background-color: #24355C;
  }
  .mask {
      height: 100%;
      background-color: rgba(14,48,10,0.8);
  }
  .formbox {
      width: 550px;
  }
  .centerbox {
      max-width: 400px;
  }
  .centerbox h1 {
      margin-top: 1em;
      margin-bottom: 1em
  }