* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }
        
        /* Smart CSC Tools Branding */
        .smart-header {
            background: rgba(63, 5, 255, 0.687);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
         .spinner-small {
            border: 2px solid #f3f3f3;
            border-top: 2px solid #6366f1;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            animation: spin 1s linear infinite;
        }
        
        /* Drop Zone */
        .drop-zone {
            border: 3px dashed #6366f1;
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            background: white;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .drop-zone:hover, .drop-zone.dragover {
            background: #eef2ff;
            border-color: #4f46e5;
            transform: scale(1.02);
            box-shadow: 0 20px 40px rgba(79, 70, 229, 0.2);
        }
        
        /* Main Card */
        .tool-card {
            background: white;
            border-radius: 24px;
            padding: 30px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            margin-top: 20px;
        }
        
        /* Preview Canvas */
        canvas {
            max-width: 100%;
            border-radius: 12px;
            border: 2px solid #e5e7eb;
            background: #f9fafb;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        }
        
        /* Buttons */
        .btn-primary {
            background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
            color: white;
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
            width: 100%;
            font-size: 16px;
            box-shadow: 0 4px 6px rgba(99, 102, 241, 0.25);
        }
        
        .btn-primary:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.5);
        }
        
        .btn-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        
        .btn-secondary {
            width: 100%;
            padding: 14px;
            border: 2px solid #e5e7eb;
            border-radius: 50px;
            background: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 10px;
        }
        
        .btn-secondary:hover {
            border-color: #6366f1;
            color: #6366f1;
            background: #f5f3ff;
        }
        
        /* Form Controls */
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            margin-bottom: 15px;
            font-size: 14px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            outline: none;
            border-color: #6366f1;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }
        
        /* Tabs */
        .tab-btn {
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .tab-btn.active {
            background: #6366f1;
            color: white;
            box-shadow: 0 4px 6px rgba(99, 102, 241, 0.25);
        }
        
        .tab-btn:not(.active) {
            background: #f3f4f6;
            color: #4b5563;
        }
        
        .tab-btn:not(.active):hover {
            background: #e5e7eb;
        }
        
        /* Feature Cards */
        .feature-card {
            background: white;
            padding: 20px;
            border-radius: 16px;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            transition: all 0.3s;
            border: 1px solid #e5e7eb;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.1);
            border-color: #6366f1;
        }
        
        /* Badges */
        .preview-badge {
            position: absolute;
            top: 10px;
            right: 10px;
            background: #6366f1;
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .size-indicator {
            font-size: 12px;
            color: #6b7280;
            margin-top: 8px;
            padding: 8px;
            background: #f3f4f6;
            border-radius: 8px;
        }
        
        /* Toast */
        .toast {
            position: fixed;
            bottom: 20px;
            right: 20px;
            padding: 16px 24px;
            border-radius: 12px;
            color: white;
            font-weight: 500;
            z-index: 1000;
            animation: slideIn 0.3s ease;
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }
        
        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }
        
        /* Loading Spinner */
        .loading-spinner {
            display: inline-block;
            width: 48px;
            height: 48px;
            border: 4px solid #f3f3f3;
            border-top: 4px solid #6366f1;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Utility Classes */
        .hidden {
            display: none !important;
        }
        
        .preview-container {
            position: relative;
            margin-bottom: 15px;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 10px;
            }
            .tool-card {
                padding: 20px;
            }
            h1 {
                font-size: 32px !important;
            }
        }