body {
  background: url("https://h5.nye.hu/wp-content/uploads/2017/09/body-bg.gif") no-repeat center center fixed;
  background-size: cover;
}
.card {
  margin-bottom: 1rem;
}
.input-group-text {
  min-width: 90px;
}
.table-responsive {
  margin-bottom: 1rem;
}
.error {
  background: #ffdddd;
  color: #b30000;
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 10px;
  font-size: 15px;
}
.navbar-brand img{
  width: 150px;
  height: auto;
}