.modal-content {
  background: #1b1b1b;
  color: #fff;
}

.form-control {
  background: #2a2a2a;
  border: 1px solid #ffc107;
  color: #fff;
}

.form-control:focus {
  border-color: #ffc107;
  box-shadow: 0 0 10px #ffc107;
  background: #2a2a2a;
  color: #fff;
}

.btn-warning:hover {
  background-color: #e0a800;
  color: #1b1b1b;
}
.custom-close {
  background: none;
  border: none;
  font-size: 1.8rem;
  color: #ffc107;  /* your yellow color */
  cursor: pointer;
  opacity: 0.9;
  transition: all 0.3s ease-in-out;
}

.custom-close:hover {
  opacity: 1;
  color: #fff;
}

.custom-close span {
  display: inline-block;
  line-height: 1;
}

.modal-title {
  font-size: 1.8rem;
}