* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
        }

        .header {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            position: relative;
        }

        .header-nav {
            position: absolute;
            top: 0;
            right: 0;
        }

        .header-nav ul {
            display: flex;
            list-style: none;
            gap: 20px;
            margin: 0;
            padding: 0;
        }

        .header-nav a {
            color: #667eea;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all 0.3s ease;
        }

        .header-nav a:hover {
            background: rgba(102, 126, 234, 0.1);
            color: #764ba2;
        }

        .logo {
            width: 60px;
            height: 60px;
            filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
            transition: transform 0.3s ease, filter 0.3s ease;
        }

        .logo:hover {
            transform: scale(1.05);
            filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.15));
        }

        h1 {
            text-align: center;
            color: #333;
            font-size: 2.5rem;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin: 0;
        }

        .drop-zone {
            border: 3px dashed #667eea;
            border-radius: 15px;
            padding: 60px 20px;
            text-align: center;
            margin-bottom: 30px;
            transition: all 0.3s ease;
            background: linear-gradient(45deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .drop-zone::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(102, 126, 234, 0.1), transparent);
            transform: rotate(45deg);
            transition: all 0.6s ease;
            opacity: 0;
        }

        .drop-zone:hover::before {
            opacity: 1;
            animation: shimmer 2s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
            100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
        }

        .drop-zone.dragover {
            border-color: #764ba2;
            background: linear-gradient(45deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
            transform: scale(1.02);
        }

        .drop-zone-content {
            position: relative;
            z-index: 1;
        }

        .drop-zone i {
            font-size: 4rem;
            color: #667eea;
            margin-bottom: 20px;
            display: block;
        }

        .drop-zone h3 {
            color: #333;
            margin-bottom: 10px;
            font-size: 1.5rem;
        }

        .drop-zone p {
            color: #666;
            font-size: 1.1rem;
        }

        .help-text {
            color: #888;
            font-size: 0.9rem;
            font-style: italic;
            margin-top: 10px;
            display: block;
        }

        .file-input {
            display: none;
        }

        .controls {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            align-items: center;
        }

        .format-selector {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .format-btn {
            padding: 12px 24px;
            border: 2px solid #667eea;
            background: transparent;
            color: #667eea;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .format-btn.active {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .quality-control {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .quality-slider {
            width: 120px;
            height: 6px;
            border-radius: 3px;
            background: #ddd;
            outline: none;
            -webkit-appearance: none;
        }

        .quality-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: linear-gradient(45deg, #667eea, #764ba2);
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
        }

        .action-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 30px;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
        }

        .btn-secondary {
            background: linear-gradient(45deg, #f093fb, #f5576c);
            color: white;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .progress-container {
            margin: 20px 0;
            display: none;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: #f0f0f0;
            border-radius: 4px;
            overflow: hidden;
            position: relative;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(45deg, #667eea, #764ba2);
            width: 0%;
            transition: width 0.3s ease;
            position: relative;
        }

        .progress-fill::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            animation: progress-shimmer 2s infinite;
        }

        @keyframes progress-shimmer {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        .file-list {
            margin-top: 30px;
        }

        .image-viewer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .image-viewer.active {
            display: flex;
        }

        .image-viewer img {
            max-width: 90%;
            max-height: 90%;
            object-fit: contain;
            border-radius: 10px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }

        .close-viewer {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            font-size: 2rem;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            cursor: pointer;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        .close-viewer:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .viewer-info {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px 20px;
            border-radius: 20px;
            backdrop-filter: blur(10px);
        }

        .file-item {
            display: flex;
            align-items: center;
            padding: 15px;
            margin-bottom: 10px;
            background: rgba(102, 126, 234, 0.05);
            border-radius: 10px;
            border-left: 4px solid #667eea;
            transition: all 0.3s ease;
        }

        .file-item:hover {
            background: rgba(102, 126, 234, 0.1);
            transform: translateX(5px);
        }

        .file-preview {
            width: 60px;
            height: 60px;
            border-radius: 8px;
            margin-right: 15px;
            object-fit: cover;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .file-preview:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
        }

        .file-info {
            flex: 1;
        }

        .file-name {
            font-weight: 600;
            color: #333;
            margin-bottom: 5px;
        }

        .file-size {
            color: #666;
            font-size: 0.9rem;
        }

        .file-actions {
            display: flex;
            gap: 10px;
        }

        .btn-small {
            padding: 8px 16px;
            font-size: 0.8rem;
            border-radius: 15px;
        }

        .status-indicator {
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .status-processing {
            background: rgba(255, 193, 7, 0.2);
            color: #ffa000;
        }

        .status-completed {
            background: rgba(76, 175, 80, 0.2);
            color: #388e3c;
        }

        .status-error {
            background: rgba(244, 67, 54, 0.2);
            color: #d32f2f;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
            }

            .header {
                gap: 15px;
            }

            .logo {
                width: 50px;
                height: 50px;
            }

            h1 {
                font-size: 2rem;
            }

            .controls {
                flex-direction: column;
                align-items: stretch;
            }

            .file-item {
                flex-direction: column;
                text-align: center;
            }

            .file-preview {
                margin: 0 0 10px 0;
            }
        }

        /* Footer Styles */
        .footer {
            margin-top: 50px;
            padding: 40px 0 20px 0;
            border-top: 2px solid rgba(102, 126, 234, 0.1);
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
            border-radius: 0 0 20px 20px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-section h3 {
            color: #333;
            font-size: 1.2rem;
            margin-bottom: 15px;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-section ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-section li {
            margin-bottom: 8px;
            color: #555;
            font-size: 0.9rem;
        }

        .format-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 15px;
        }

        .format-category {
            background: rgba(102, 126, 234, 0.05);
            padding: 15px;
            border-radius: 10px;
            text-align: center;
        }

        .format-category h4 {
            color: #667eea;
            margin-bottom: 8px;
            font-size: 1rem;
        }

        .format-category p {
            color: #666;
            font-size: 0.85rem;
            margin: 0;
        }

        .footer-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #667eea;
            text-decoration: none;
            padding: 8px 16px;
            border-radius: 15px;
            background: rgba(102, 126, 234, 0.1);
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            background: rgba(102, 126, 234, 0.2);
            color: #764ba2;
            transform: translateY(-2px);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(102, 126, 234, 0.1);
            color: #666;
        }

        .footer-bottom p {
            margin: 5px 0;
            font-size: 0.9rem;
        }

        /* Responsive updates for header and footer */
        @media (max-width: 768px) {
            .header-nav {
                position: static;
                margin-top: 15px;
                width: 100%;
                text-align: center;
            }

            .header-nav ul {
                justify-content: center;
                gap: 10px;
            }

            .header-nav a {
                padding: 6px 12px;
                font-size: 0.9rem;
            }

            .footer-content {
                grid-template-columns: 1fr;
                gap: 25px;
            }

            .format-grid {
                grid-template-columns: 1fr;
            }

            .footer-links {
                justify-content: center;
            }
        }
        }