body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 600px;
  margin: 50px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  text-align: center;
}

button {
  padding: 16px 20px;
  font-size: 16px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
}

.error-message {
  margin-top: 20px;
  padding: 10px;
  background-color: #ffcccc;
  border: 1px solid #ff0000;
  color: #ff0000;
  border-radius: 4px;
}

.success-message {
  margin-top: 20px;
  padding: 10px;
  background-color: #d4edda;
  border: 1px solid #c3e6cb;
  color: #155724;
  border-radius: 4px;
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-left-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
  width: 100%;
  padding: 12px 20px;
  margin: 16px 0;
  box-sizing: border-box;
  border: 2px solid #ccc;
  border-radius: 4px;
  background-color: #f8f8f8;
  font-size: 16px;
  color: #333;
  transition: border-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
  border-color: #4caf50;
  box-shadow: 0 0 8px rgba(76, 175, 80, 0.5);
  background-color: #fff;
  outline: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}