:root {
            --primary-color: #4361ee;
            --secondary-color: #3f37c9;
            --success-color: #4cc9f0;
            --warning-color: #f72585;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
            --box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: #fff;
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .inner {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .line1, .line2, .line3 {
            height: 4px;
            width: 100px;
            background-color: var(--primary-color);
            margin: 5px;
            border-radius: 2px;
            animation: loading 1.5s infinite ease-in-out;
        }
        
        .line2 {
            animation-delay: 0.2s;
        }
        
        .line3 {
            animation-delay: 0.4s;
        }
        
        @keyframes loading {
            0%, 100% { transform: scaleX(0.5); opacity: 0.5; }
            50% { transform: scaleX(1); opacity: 1; }
        }
        
        .form-container {
            background-color: white;
            border-radius: 15px;
            box-shadow: var(--box-shadow);
            overflow: hidden;
            width: 100%;
            max-width: 450px;
            transition: all 0.3s ease;
        }
        
        .form-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 30px 20px;
            text-align: center;
        }
        
        .form-header img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background-color: white;
            padding: 10px;
            margin-bottom: 15px;
        }
        
        .form-header h4 {
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .form-body {
            padding: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-control {
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 12px 15px;
            font-size: 16px;
            transition: all 0.3s;
            width: 100%;
        }
        
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
            outline: none;
        }
        
        .btn {
            border-radius: 8px;
            padding: 12px 20px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            width: 100%;
            font-size: 16px;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
        }
        
        .btn-warning {
            background: linear-gradient(135deg, #f9a826, #f7931e);
            color: white;
        }
        
        .btn-warning:hover {
            background: linear-gradient(135deg, #f7931e, #f9a826);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(249, 168, 38, 0.3);
        }
        
        .btn-success {
            background: linear-gradient(135deg, #06ffa5, #4cc9f0);
            color: white;
        }
        
        .btn-success:hover {
            background: linear-gradient(135deg, #4cc9f0, #06ffa5);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(6, 255, 165, 0.3);
        }
        
        .back-link {
            text-align: center;
            margin-top: 20px;
        }
        
        .back-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .back-link a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        
        .step-indicator {
            display: flex;
            justify-content: center;
            margin-bottom: 25px;
        }
        
        .step {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background-color: #e0e0e0;
            color: #aaa;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            font-weight: bold;
            position: relative;
        }
        
        .step.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .step.completed {
            background-color: var(--success-color);
            color: white;
        }
        
        .step::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 2px;
            background-color: #e0e0e0;
            right: -40px;
            top: 50%;
            transform: translateY(-50%);
        }
        
        .step:last-child::after {
            display: none;
        }
        
        .step.completed::after {
            background-color: var(--success-color);
        }
        
        @media (max-width: 576px) {
            .form-container {
                max-width: 100%;
            }
            
            .form-body {
                padding: 20px;
            }
            
            .step::after {
                width: 30px;
                right: -30px;
            }
        }
        
        @media (max-width: 400px) {
            .step {
                width: 25px;
                height: 25px;
                font-size: 12px;
            }
            
            .step::after {
                width: 20px;
                right: -20px;
            }
        }