.registration-form {
            max-width: 800px;
            margin: 50px auto;
            padding: 30px;
            background: #f9f9f9;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #333;
        }
        
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #007bff;
        }
        
        .error-message {
            color: #dc3545;
            font-size: 12px;
            margin-top: 5px;
            display: none;
        }
        
        .form-group.error input {
            border-color: #dc3545;
        }
        
        .form-group.error .error-message {
            display: block;
        }
        
        .submit-btn {
            width: 100%;
            padding: 12px;
            background: #007bff;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
        }
        
        .submit-btn:hover {
            background: #0056b3;
        }