* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }

        :root {
            --primary: #4361ee;
            --secondary: #3f37c9;
            --success: #4cc9f0;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --border: #dee2e6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            width: 100%;
            background: white;
            border-radius: 16px;
            box-shadow: var(--shadow);
            overflow: hidden;
            position: relative;
        }

        .header {
            background: linear-gradient(120deg, var(--primary), var(--secondary));
            color: white;
            padding: 25px 30px;
            text-align: center;
            position: relative;
        }

        .header h1 {
            font-weight: 600;
            font-size: 28px;
            margin-bottom: 5px;
        }

        .header p {
            opacity: 0.9;
        }

        .progress-container {
            padding: 20px 30px;
            background-color: var(--light);
        }

        .progress-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
        }

        .progress-steps::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 0;
            height: 4px;
            width: 100%;
            background-color: var(--border);
            transform: translateY(-50%);
            z-index: 1;
        }

        .progress-bar {
            position: absolute;
            top: 50%;
            left: 0;
            height: 4px;
            background: var(--primary);
            transform: translateY(-50%);
            z-index: 2;
            transition: var(--transition);
        }

        .step {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: white;
            border: 3px solid var(--border);
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: 600;
            color: var(--gray);
            z-index: 3;
            transition: var(--transition);
        }

        .step.active {
            border-color: var(--primary);
            color: var(--primary);
            background: #eef2ff;
            transform: scale(1.1);
        }

        .step.completed {
            border-color: var(--primary);
            background: var(--primary);
            color: white;
        }

        .form-container {
            padding: 30px;
            min-height: 500px;
        }

        .form-page {
            display: none;
            animation: fadeIn 0.5s ease;
        }

        .form-page.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .page-title {
            font-size: 24px;
            color: var(--dark);
            margin-bottom: 25px;
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }

        .page-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 16px;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
        }

        .btn-group {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
        }

        .btn {
            padding: 12px 30px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .btn-prev {
            background: white;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-prev:hover:not(:disabled) {
            background: #f0f2ff;
        }

        .btn-next {
            background: var(--primary);
            color: white;
        }

        .btn-next:hover:not(:disabled) {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
        }

        .btn-submit {
            background: #06d6a0;
            color: white;
            width: 100%;
        }

        .btn-submit:hover {
            background: #05b388;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(6, 214, 160, 0.3);
        }

        /* Language selection */
        .language-options {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 15px;
            margin-top: 30px;
        }

        .language-option {
            border: 2px solid var(--border);
            border-radius: 10px;
            padding: 20px 10px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .language-option:hover {
            border-color: var(--primary);
            background: #f8f9ff;
        }

        .language-option.selected {
            border-color: var(--primary);
            background: #eef2ff;
            transform: scale(1.03);
            box-shadow: 0 4px 10px rgba(67, 97, 238, 0.15);
        }

        .language-option i {
            font-size: 32px;
            margin-bottom: 10px;
            color: var(--primary);
        }

        /* Vehicle cards */
        .vehicle-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .vehicle-card {
            border: 2px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            cursor: pointer;
            transition: var(--transition);
        }

        .vehicle-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            border-color: var(--primary);
        }

        .vehicle-card.selected {
            border-color: var(--primary);
            background: #eef2ff;
        }

        .vehicle-image {
            height: 120px;
            background: var(--light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            color: var(--primary);
        }

        .vehicle-name {
            padding: 15px;
            text-align: center;
            font-weight: 500;
            color: var(--dark);
            background: white;
        }

        /* File upload */
        .upload-container {
            border: 2px dashed var(--border);
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            margin: 20px 0;
            transition: var(--transition);
            cursor: pointer;
        }

        .upload-container:hover {
            border-color: var(--primary);
            background: #f8f9ff;
        }

        .upload-icon {
            font-size: 48px;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .upload-text {
            margin-bottom: 15px;
            color: var(--gray);
        }

        .file-input {
            display: none;
        }

        .upload-btn {
            background: var(--primary);
            color: white;
            padding: 8px 20px;
            border-radius: 6px;
            display: inline-block;
            cursor: pointer;
        }

        .file-preview {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
        }

        .file-item {
            width: 80px;
            text-align: center;
        }

        .file-icon {
            width: 60px;
            height: 60px;
            background: var(--light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 5px;
            font-size: 24px;
            color: var(--primary);
        }

        .file-name {
            font-size: 12px;
            color: var(--gray);
            word-break: break-all;
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .container {
                max-width: 100%;
            }
            
            .form-container {
                padding: 20px;
            }
            
            .language-options,
            .vehicle-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .header {
                padding: 20px 15px;
            }
            
            .step {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            
            .language-options,
            .vehicle-cards {
                grid-template-columns: 1fr;
            }
        }