body {
  margin: 0;
  padding: 0;
  background: #000;
  color: #ffd700;
  font-family: Arial, sans-serif;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 20px #ffd700;
}

input, select, button {
  padding: 10px;
  font-size: 1rem;
  border: none;
  border-radius: 5px;
  margin: 5px;
}

input, select {
  background: #111;
  color: #ffd700;
}

button {
  background-color: #ffd700;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #e6c200;
}

h1 {
  margin-bottom: 20px;
}

.hidden {
  display: none;
}

.loader {
  border: 5px solid #333;
  border-top: 5px solid #ffd700;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}