body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
}

h2 {
  margin-bottom: 20px;
}

form {
  max-width: 400px;
  margin: 0 auto;
}

label {
  display: block;
  margin-bottom: 10px;
}

input[type="file"],
select {
  width: 100%;
  padding: 8px;
  font-size: 16px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  background-color: #4CAF50;
  color: white;
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button[type="submit"] {
  background-color: #008CBA;
}

button[type="button"] {
  background-color: #f44336;
  margin-right: 10px;
}

button[type="submit"]:hover,
button[type="button"]:hover {
  opacity: 0.8;
}

.alert {
  background-color: #f2f2f2;
  color: #666;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 20px;
}

/* Loading spinner styles */
.loader {
  border: 4px solid rgba(0, 0, 0, 0.3);
  border-top: 4px solid #3498db;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 2s linear infinite;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -20px;
  margin-left: -20px;
  display: none; /* Initially hidden */
}

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