body {
  background-image: url("background.png");
  background-repeat: no-repeat;
  background-size: cover;
}

h1 {
  text-align: center;
}

.border-red {
  border: 4px !important;
  border-style: solid !important;
  border-color: red !important;
}

.card {
  background-color: #f5f5f5;
  width: 25%;
}

#warning-checkbox-message {
  visibility: hidden;
}