body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: white;
  padding: 40px;
  border: 2px solid #e0e0e0;
  max-width: 400px;
  width: 90%;
}

h2 {
  text-align: center;
  font-size: 28px;
  color: #333;
  margin-bottom: 30px;
}

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

.form-label {
  display: block;
  font-size: 16px;
  color: #333;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 2px solid #ddd;
  box-sizing: border-box;
  transition: border-color 0.3s;
}

.form-input:focus {
  outline: none;
  border-color: #2196f3;
}

.success-message {
  color: #4caf50;
  font-size: 14px;
  margin: 10px 0;
  text-align: center;
}

.error-message {
  color: #f44336;
  font-size: 14px;
  margin: 10px 0;
  text-align: center;
}

.submit-btn {
  width: 100%;
  padding: 15px;
  background: #2196f3;
  color: white;
  border: 2px solid #2196f3;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 10px;
}

.submit-btn:hover {
  background: white;
  color: #2196f3;
}

.back-home {
  display: block;
  margin-top: 20px;
  padding: 12px;
  text-align: center;
  background: white;
  color: #666;
  text-decoration: none;
  border: 2px solid #ddd;
  transition: all 0.3s;
}

.back-home:hover {
  border-color: #999;
  background: #f5f5f5;
}

@media (max-width: 600px) {
  .container {
    padding: 30px 20px;
  }

  h2 {
    font-size: 24px;
  }
}