* {
            font-family: 'Inter', sans-serif;
        }

        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        .drop-zone {
            border: 3px dashed #c7d2fe;
            border-radius: 20px;
            padding: 3rem;
            text-align: center;
            background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
            transition: all 0.3s ease;
            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 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
            transform: rotate(45deg);
            animation: shimmer 3s infinite;
        }

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

        .drop-zone.dragover {
            border-color: #4f46e5;
            background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
            transform: scale(1.02);
            box-shadow: 0 20px 40px rgba(79, 70, 229, 0.3);
        }

        .file-info {
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            border-radius: 12px;
            padding: 1rem;
            border-left: 4px solid #4f46e5;
        }

        .page-preview {
            max-height: 300px;
            overflow-y: auto;
            padding: 1rem;
            background: #f8fafc;
            border-radius: 12px;
            border: 1px solid #e2e8f0;
        }

        .page-preview canvas {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .page-preview canvas:hover {
            transform: scale(1.02);
        }

        .btn-primary {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.5);
        }

        .btn-primary:active:not(:disabled) {
            transform: translateY(0);
        }

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

        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #4f46e5;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            animation: spin 1s linear infinite;
            display: inline-block;
        }

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

        .toast-message {
            animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
            border-radius: 12px;
            padding: 1rem 1.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @keyframes fadeOut {
            from {
                opacity: 1;
            }
            to {
                opacity: 0;
            }
        }

        .stat-card {
            background: white;
            border-radius: 16px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        @media (max-width: 640px) {
            .drop-zone {
                padding: 1.5rem;
            }
            .stat-card {
                padding: 1rem;
            }
        }

        /* Progress bar */

        .progress-bar {
            height: 6px;
            background: linear-gradient(90deg, #4f46e5, #7c3aed);
            border-radius: 3px;
            transition: width 0.3s ease;
        }

        /* Loading skeleton */

        .skeleton {
            background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
            background-size: 200% 100%;
            animation: loading 1.5s infinite;
        }

        @keyframes loading {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }