:root {
            --primary: #0066ff;
            --primary-dark: #0055ee;
            --secondary: #8B46FA;
            --dark: #1E293B;
            --light: #F8FAFC;
            --gray: #64748B;
            --success: #10B981;
            --border: #E2E8F0;
            --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        }

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

        body {
            background-color: #f9fafb;
            color: var(--dark);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .navbar {
            background: white;
            box-shadow: var(--shadow);
            padding: 1rem 2rem;
        }

        .logo {
            font-weight: 700;
            font-size: 1.5rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .hero-section {
            text-align: center;
            padding: 3rem 1rem;
            background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23eef2ff' fill-opacity='0.4' fill-rule='evenodd'/%3E%3C/svg%3E");
        }

        .hero-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 1.125rem;
            color: var(--gray);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .upload-container {
            max-width: 500px;
            margin: 0 auto;
            background: white;
            border-radius: 16px;
            box-shadow: var(--shadow);
            padding: 2rem;
            transition: all 0.3s ease;
        }

        .upload-container.expanded {
            max-width: 800px;
        }

        .upload-area {
            border: 2px dashed var(--border);
            border-radius: 12px;
            padding: 2.5rem 2rem;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .upload-area:hover {
            border-color: var(--primary);
        }

        .upload-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .upload-text {
            font-size: 1.125rem;
            font-weight: 500;
            color: var(--dark);
            margin-bottom: 0.5rem;
        }

        .upload-subtext {
            color: var(--gray);
            font-size: 0.875rem;
        }

        .upload-input {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            opacity: 0;
            cursor: pointer;
        }

        .preview-container {
            display: none;
            margin-top: 2rem;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .preview-box {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }

        .preview-title {
            background: #f8fafc;
            padding: 0.75rem;
            font-weight: 600;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }

        .preview-image {
            width: 100%;
            height: 250px;
            object-fit: contain;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Crect width='100' height='100' fill='%23f1f5f9'/%3E%3Cpath d='M25,25 L75,75 M75,25 L25,75' stroke='%23e2e8f0' stroke-width='2'/%3E%3C/svg%3E");
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .action-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-primary:disabled {
            background: #ccc;
            cursor: not-allowed;
            transform: none;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-outline:hover {
            background: #f0f7ff;
            transform: translateY(-2px);
        }

        .loading-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.9);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            z-index: 10;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .loading-overlay.active {
            opacity: 1;
            pointer-events: all;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f0f0f0;
            border-top: 5px solid var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 1rem;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .features-section {
            padding: 4rem 2rem;
            background: white;
        }

        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 3rem;
            color: var(--dark);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-card {
            background: var(--light);
            border-radius: 12px;
            padding: 1.5rem;
            text-align: center;
            transition: transform 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .feature-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }

        .feature-description {
            color: var(--gray);
            font-size: 0.875rem;
        }

        footer {
            background: var(--dark);
            color: white;
            padding: 2rem;
            text-align: center;
            margin-top: auto;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }

        /* Responsive styles */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            
            .preview-container {
                grid-template-columns: 1fr;
            }
            
            .action-buttons {
                flex-direction: column;
            }
        }

        .hide {
            display: none;
        }