@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
        
        body {
            font-family: 'Inter', sans-serif;
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        .glass-morphism {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .drop-zone.active {
            border-color: #4f46e5;
            background-color: #f5f3ff;
            transform: scale(1.01);
        }

        .pattern-checkered {
            background-image: linear-gradient(45deg, #e5e7eb 25%, transparent 25%), 
                              linear-gradient(-45deg, #e5e7eb 25%, transparent 25%), 
                              linear-gradient(45deg, transparent 75%, #e5e7eb 75%), 
                              linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
            background-size: 20px 20px;
            background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
        }

        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }

        .preview-box {
            display: flex;
            align-items: center;
            justify-content: center;
            background: #0f172a;
            border-radius: 2rem;
            overflow: auto;
            width: 100%;
            height: 600px;
            box-shadow: inset 0 2px 10px rgba(0,0,0,0.2);
            padding: 2rem;
        }

        @media (max-width: 640px) {
            .preview-box { height: 400px; }
        }

        .preview-box img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            box-shadow: 0 20px 50px rgba(0,0,0,0.4);
        }
        
        .mode-btn.active {
            border-color: #4f46e5;
            background-color: #f5f3ff;
            color: #4f46e5;
        }

        input[type="range"] {
            height: 6px;
            -webkit-appearance: none;
            background: #e2e8f0;
            border-radius: 10px;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 18px;
            height: 18px;
            background: #4f46e5;
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        .seo-gradient {
            background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
        }