/* Demo Container */
        .demo-container {
            max-width: 800px;
            margin: 50px auto;
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.2);
            text-align: center;
        }
        
        .demo-container h1 {
            color: #2c3e50;
            margin-bottom: 30px;
        }
        
        .demo-container p {
            color: #64748b;
            margin-bottom: 30px;
        }
        
        /* Modal Overlay */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 9999;
            animation: fadeIn 0.3s ease;
            backdrop-filter: blur(5px);
        }
        
        .modal-overlay.active {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        /* Modal Content */
        .modal-content {
            background: white;
            border-radius: 16px;
            max-width: 500px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            animation: slideUp 0.3s ease;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }
        
        @keyframes slideUp {
            from {
                transform: translateY(50px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }
        
        /* Modal Header */
        .modal-header {
            padding: 30px 30px 20px;
            border-bottom: 1px solid #e5e7eb;
            position: relative;
        }
        
        .modal-header h2 {
            color: #1e3c72;
            font-size: 24px;
            margin: 0;
        }
        
        .modal-header p {
            color: #64748b;
            margin-top: 8px;
            font-size: 14px;
        }
        
        .modal-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 32px;
            height: 32px;
            border: none;
            background: #f1f5f9;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            color: #64748b;
            font-size: 18px;
        }
        
        .modal-close:hover {
            background: #e2e8f0;
            color: #334155;
            transform: rotate(90deg);
        }
        
        /* Modal Body */
        .modal-body {
            padding: 30px;
        }
        
        /* Form Elements */
        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 6px;
            color: #334155;
            font-weight: 500;
            font-size: 14px;
        }
        
        .form-group label .required {
            color: #ef4444;
            margin-left: 2px;
        }
        
        .form-group label .optional {
            color: #94a3b8;
            font-weight: 400;
            font-size: 13px;
            margin-left: 4px;
        }
        
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            font-size: 15px;
            transition: all 0.2s ease;
            font-family: inherit;
        }
        
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
        }
        
        .form-group textarea {
            resize: vertical;
            min-height: 80px;
        }
        
        /* Checkbox Group */
        .checkbox-group {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-bottom: 20px;
        }
        
        .checkbox-group input[type="checkbox"] {
            margin-top: 3px;
            width: 18px;
            height: 18px;
            cursor: pointer;
        }
        
        .checkbox-group label {
            font-size: 13px;
            color: #475569;
            line-height: 1.4;
            cursor: pointer;
        }
        
        .checkbox-group label a {
            color: #3498db;
            text-decoration: none;
            font-weight: 500;
        }
        
        .checkbox-group label a:hover {
            text-decoration: underline;
        }
        
        /* Submit Button */
        .form-submit {
            background: linear-gradient(135deg, #3498db, #2980b9);
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
        }
        
        .form-submit:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
        }
        
        .form-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        
        /* Success Message */
        .success-message {
            display: none;
            text-align: center;
            padding: 40px;
        }
        
        .success-message.active {
            display: block;
        }
        
        .success-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #10b981, #059669);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 28px;
        }
        
        .success-message h3 {
            color: #1e3c72;
            margin-bottom: 10px;
        }
        
        .success-message p {
            color: #64748b;
            margin-bottom: 20px;
        }
        
        /* Privacy Note */
        .privacy-note {
            background: #f8fafc;
            border-left: 3px solid #3498db;
            padding: 12px 15px;
            border-radius: 6px;
            margin-top: 20px;
            font-size: 12px;
            color: #64748b;
            line-height: 1.5;
        }
        
        .privacy-note i {
            color: #3498db;
            margin-right: 6px;
        }
        
        /* Loading Spinner */
        .spinner {
            display: none;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f4f6;
            border-top: 3px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .form-submit.loading .button-text {
            display: none;
        }
        
        .form-submit.loading .spinner {
            display: block;
        }