* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        .wrapper-container {
            width: 100%;
            max-width: 1000px;
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            padding: 30px;
            margin-bottom: 30px;
        }
        
     h1 {
           margin-bottom: 20px;
           color: #2c3e50;
           font-weight: 600;
     }
        
        .description {
            text-align: center;
            margin-bottom: 30px;
            color: #7f8c8d;
            line-height: 1.6;
            font-size: 1.1rem;
        }
        
        .app-container {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .upload-section {
            flex: 1;
            min-width: 300px;
        }
        
        .results-section {
            flex: 1;
            min-width: 300px;
        }
        
        .upload-area {
            border: 3px dashed #1a2a6c;
            border-radius: 12px;
            padding: 40px 20px;
            text-align: center;
            margin-bottom: 25px;
            transition: all 0.3s;
            background-color: #f8fafc;
            position: relative;
        }
        
        .upload-area:hover, .upload-area.dragover {
            background-color: #e8eef5;
            border-color: #fdbb2d;
        }
        
        .upload-icon {
            font-size: 50px;
            color: #1a2a6c;
            margin-bottom: 15px;
        }
        
        .upload-text {
            margin-bottom: 20px;
            font-size: 18px;
        }
        
        .btn {
            background: linear-gradient(to right, #1a2a6c, #b21f1f);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 50px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s;
            display: inline-block;
            box-shadow: 0 4px 15px rgba(26, 42, 108, 0.3);
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 20px rgba(26, 42, 108, 0.4);
        }
        
        .btn:active {
            transform: translateY(0);
        }
        
        .btn-optimize {
            background: linear-gradient(to right, #2ecc71, #27ae60);
            width: 100%;
            margin-top: 20px;
            padding: 15px;
            box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
        }
        
        .btn-optimize:hover {
            box-shadow: 0 7px 20px rgba(46, 204, 113, 0.4);
        }
        
        .btn-optimize:disabled {
            background: #95a5a6;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }
        
        .btn-download {
            background: linear-gradient(to right, #1a2a6c, #b21f1f);
            width: 100%;
            margin-top: 20px;
            padding: 15px;
            box-shadow: 0 4px 15px rgba(26, 42, 108, 0.3);
        }
        
        .btn-download:hover {
            box-shadow: 0 7px 20px rgba(26, 42, 108, 0.4);
        }
        
        .file-input {
            display: none;
        }
        
        .preview-container {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 25px;
        }
        
        .preview-card {
            flex: 1;
            min-width: 250px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .preview-header {
            background: #f8fafc;
            padding: 15px;
            text-align: center;
            font-weight: 600;
            color: #2c3e50;
            border-bottom: 1px solid #eee;
        }
        
        .preview-content {
            padding: 15px;
            text-align: center;
            background: white;
            min-height: 250px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        
        .pdf-preview {
            width: 100%;
            height: 200px;
            border: 1px dashed #ccc;
            border-radius: 8px;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 15px;
            overflow: hidden;
        }
        
        .pdf-preview img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }
        
        .file-info {
            font-size: 14px;
            color: #7f8c8d;
            margin-top: 5px;
        }
        
        .options {
            margin: 20px 0;
            padding: 20px;
            background-color: #f8fafc;
            border-radius: 12px;
        }
        
        .option-title {
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
            font-size: 1.2rem;
        }
        
        .option-group {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .option-item {
            flex: 1;
            min-width: 200px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            color: #34495e;
            font-weight: 500;
        }
        
        select, input[type="range"] {
            width: 100%;
            padding: 5px 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            background-color: white;
        }
        
        input[type="range"] {
            padding: 0;
            height: 10px;
        }
        
        .slider-value {
            text-align: center;
            font-weight: 600;
            color: #1a2a6c;
            margin-top: 5px;
        }
        
        .savings {
            text-align: center;
            margin: 20px 0;
            padding: 15px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.2rem;
            background-color: rgba(46, 204, 113, 0.1);
            color: #27ae60;
        }
        
        .status {
            text-align: center;
            margin: 20px 0;
            padding: 15px;
            border-radius: 8px;
            font-weight: 500;
        }
        
        .status.success {
            background-color: rgba(46, 204, 113, 0.2);
            color: #27ae60;
        }
        
        .status.error {
            background-color: rgba(231, 76, 60, 0.2);
            color: #c0392b;
        }
        
        .status.info {
            background-color: rgba(52, 152, 219, 0.2);
            color: #2980b9;
        }
        
        .hidden {
            display: none;
        }
        
        footer {
            text-align: center;
            color: white;
            margin-top: auto;
            padding: 20px;
            font-size: 0.9rem;
        }
        
        .pdf-info {
            margin-top: 10px;
            font-size: 14px;
            color: #7f8c8d;
        }
        
        .progress-bar {
            height: 6px;
            width: 100%;
            background: #f0f0f0;
            border-radius: 3px;
            margin-top: 10px;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            background: linear-gradient(to right, #2ecc71, #27ae60);
            width: 0%;
            transition: width 0.3s ease;
        }
        
        @media (max-width: 768px) {
            .app-container {
                flex-direction: column;
            }
            
            .container {
                padding: 20px;
            }
            
            .upload-area {
                padding: 30px 15px;
            }
        }