:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #34495e;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
            padding: 20px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            margin-bottom: 10px;
        }
        
        .progress-container {
            margin: 20px 0;
            background-color: #ddd;
            border-radius: 4px;
            height: 20px;
        }
        
        .progress-bar {
            height: 100%;
            background-color: var(--secondary-color);
            border-radius: 4px;
            width: 0%;
            transition: width 0.5s ease;
        }
        
        .form-section {
            background-color: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
            display: none;
        }
        
        .form-section.active {
            display: block;
            animation: fadeIn 0.5s;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        h2 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-color);
        }
        
        input[type="text"],
        input[type="email"],
        input[type="tel"],
        input[type="number"],
        input[type="date"],
        input[type="time"],
        textarea,
        select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
            transition: border 0.3s;
        }
        
        input:focus,
        textarea:focus,
        select:focus {
            border-color: var(--secondary-color);
            outline: none;
            box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
        }
        
        textarea {
            min-height: 100px;
            resize: vertical;
        }
        
        .checkbox-group {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 10px;
            margin-top: 10px;
        }
        
        .checkbox-item {
            display: flex;
            align-items: center;
        }
        
        .checkbox-item input {
            margin-right: 8px;
        }
        
        .btn-container {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
        }
        
        button {
            padding: 12px 24px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-prev {
            background-color: var(--light-color);
            color: var(--dark-color);
        }
        
        .btn-next {
            background-color: var(--secondary-color);
            color: white;
        }
        
        .btn-submit {
            background-color: var(--accent-color);
            color: white;
        }
        
        button:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        
        button:disabled {
            background-color: #ccc;
            cursor: not-allowed;
            transform: none;
        }
        
        .required {
            color: var(--accent-color);
        }
        
        .success-message {
            text-align: center;
            padding: 40px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .success-message h2 {
            color: #27ae60;
            margin-bottom: 20px;
        }
        
        .error {
            color: var(--accent-color);
            font-size: 14px;
            margin-top: 5px;
            display: none;
        }
        
        @media (max-width: 768px) {
            .btn-container {
                flex-direction: column;
                gap: 10px;
            }
            
            button {
                width: 100%;
            }
            
            .checkbox-group {
                grid-template-columns: 1fr;
            }
        }