* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Arial', sans-serif;
  background-color: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 500px;
  margin: 50px auto;
  padding: 30px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #333;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

input[type="text"] {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 12px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #45a049;
}

button:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
}

.message {
  margin-top: 20px;
  padding: 15px;
  border-radius: 4px;
  text-align: center;
}

.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
  margin-bottom: 20px;
}

.phone-info {
  margin: 20px 0;
  padding: 15px;
  background-color: #f8f9fa;
  border-radius: 4px;
}

.phone-number {
  font-size: 24px;
  font-weight: bold;
  margin: 10px 0;
}

.copy-btn {
  display: inline-block;
  padding: 5px 10px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  margin-left: 10px;
  width: auto;
}

.countdown {
  display: inline-block;
  margin-left: 10px;
  color: #666;
}

.verify-code {
  margin-top: 20px;
  padding: 20px;
  background-color: #e3f2fd;
  border-radius: 4px;
  text-align: center;
}

.code-display {
  font-size: 32px;
  font-weight: bold;
  color: #1976d2;
  margin: 10px 0;
}

.sms-content {
  margin-top: 10px;
  font-size: 14px;
  color: #666;
  white-space: pre-wrap;
}