:root {
            --primary-color: #4e73df;
            --secondary-color: #1cc88a;
            --dark-color: #5a5c69;
            --light-color: #f8f9fc;
        }
        
        body {
            background-color: #f8f9fc;
            font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        
        .navbar-brand {
            font-weight: 800;
            font-size: 1.5rem;
        }
        
        .card {
            border: none;
            border-radius: 1rem;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1);
        }
        
        .step-circle {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--light-color);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            font-size: 1.25rem;
            color: var(--dark-color);
            border: 2px solid #e3e6f0;
        }
        
        .step-item.active .step-circle {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .step-label {
            font-weight: 600;
            color: var(--dark-color);
            font-size: 0.85rem;
        }
        
        .step-item.active .step-label {
            color: var(--primary-color);
        }
        
        .upload-area {
            border: 2px dashed #d1d3e2;
            border-radius: 0.35rem;
            padding: 2rem;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .upload-area:hover {
            border-color: var(--primary-color);
            background-color: rgba(78, 115, 223, 0.05);
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.5rem 1.5rem;
            font-weight: 600;
        }
        
        .btn-primary:hover {
            background-color: #3a5bc7;
            border-color: #3a5bc7;
        }
        
        .btn-success {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 0.5rem 1.5rem;
            font-weight: 600;
        }
        
        .btn-success:hover {
            background-color: #17a673;
            border-color: #17a673;
        }
        
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 1s ease-in-out infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .password-strength .progress-bar {
            transition: width 0.5s ease;
        }
        
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
        }
        
        #alert-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1000;
            max-width: 400px;
        }