/* Design System Variables */
        :root {
            --color-primary: #4f46e5;
            --color-primary-hover: #4338ca;
            --color-primary-light: #6366f1;
            --color-success: #10b981;
            --color-success-bg: #064e3b;
            --color-error: #ef4444;
            --color-error-bg: #7f1d1d;
            --color-warning: #f59e0b;
            --color-neutral-50: #f9fafb;
            --color-neutral-100: #f3f4f6;
            --color-neutral-200: #e5e7eb;
            --color-neutral-300: #d1d5db;
            --color-neutral-400: #9ca3af;
            --color-neutral-500: #6b7280;
            --color-neutral-600: #4b5563;
            --color-neutral-700: #374151;
            --color-neutral-800: #1f2937;
            --color-neutral-900: #111827;
            --color-neutral-950: #030712;
            
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            
            --border-radius-sm: 0.375rem;
            --border-radius-md: 0.5rem;
            --border-radius-lg: 0.75rem;
            --border-radius-xl: 1rem;
            
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
        }
        
        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: linear-gradient(135deg, var(--color-neutral-950) 0%, var(--color-neutral-900) 100%);
            color: var(--color-neutral-200);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            font-feature-settings: "cv02", "cv03", "cv04", "cv11";
        }
        
        .font-mono {
            font-family: 'JetBrains Mono', 'Fira Code', Consolas, 'Courier New', monospace;
            font-feature-settings: "liga" 1, "calt" 1;
        }

        /* Component Styles */
        .card {
            background: rgba(31, 41, 55, 0.8);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(75, 85, 99, 0.3);
            border-radius: var(--border-radius-xl);
            box-shadow: var(--shadow-xl);
        }

        .card:focus-within {
            border-color:#6365f17a !important; 
        }
        
        .button-primary {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: white;
            border: none;
            border-radius: var(--border-radius-md);
            padding: 0.75rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }
        
        .button-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }
        
        .button-primary:hover::before {
            left: 100%;
        }
        
        .button-primary:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-lg);
            background: linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-primary) 100%);
        }
        
        .button-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        
        .button-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
            box-shadow: var(--shadow-sm);
        }
        
        .button-secondary {
            background: rgba(75, 85, 99, 0.2);
            color: var(--color-neutral-300);
            border: 1px solid rgba(75, 85, 99, 0.3);
            border-radius: var(--border-radius-md);
            padding: 0.5rem 1rem;
            font-weight: 500;
            font-size: 0.875rem;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        
        .button-secondary:hover {
            background: rgba(75, 85, 99, 0.3);
            color: white;
            border-color: rgba(156, 163, 175, 0.5);
        }
        
        .input-field {
            background: rgba(31, 41, 55, 0.6);
            border: 1px solid rgba(75, 85, 99, 0.3);
            border-radius: var(--border-radius-lg);
            color: var(--color-neutral-100);
            padding: var(--spacing-md);
            font-size: 0.875rem;
            line-height: 1.5;
            transition: all 0.2s ease;
            resize: vertical;
            min-height: 300px;
        }
        
        .input-field:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
            background: rgba(31, 41, 55, 0.8);
        }
        
        .input-field::placeholder {
            color: var(--color-neutral-500);
        }
        
        .toggle-switch {
            position: relative;
            width: 48px;
            height: 24px;
            background: rgba(75, 85, 99, 0.5);
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid rgba(75, 85, 99, 0.3);
        }
        
        .toggle-switch.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
        }
        
        .toggle-switch::after {
            content: '';
            position: absolute;
            top: 2px;
            left: 2px;
            width: 18px;
            height: 18px;
            background: white;
            border-radius: 50%;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .toggle-switch.active::after {
            transform: translateX(24px);
        }
        
        .diff-line {
            display: flex;
            font-size: 0.8125rem;
            line-height: 1.5;
            font-family: 'JetBrains Mono', monospace;
            border-left: 3px solid transparent;
            transition: background-color 0.15s ease;
        }
        
        .diff-line:hover {
            background: rgba(75, 85, 99, 0.1);
        }
        
        .diff-line.added {
            background: rgba(16, 185, 129, 0.08);
            border-left-color: var(--color-success);
        }
        
        .diff-line.removed {
            background: rgba(239, 68, 68, 0.08);
            border-left-color: var(--color-error);
        }
        
        .diff-line-number {
            color: var(--color-neutral-500);
            width: 50px;
            text-align: center;
            user-select: none;
            font-variant-numeric: tabular-nums;
        }
        
        .diff-indicator {
            width: 20px;
            text-align: center;
            font-weight: 500;
        }
        
        .diff-content {
            flex: 1;
            padding: 0 var(--spacing-md);
            white-space: pre-wrap;
            word-break: break-all;
        }
        
        .stats-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-xs);
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius-sm);
            font-size: 0.75rem;
            font-weight: 500;
            font-variant-numeric: tabular-nums;
        }
        
        .stats-badge.additions {
            background: rgba(16, 185, 129, 0.15);
            color: var(--color-success);
        }
        
        .stats-badge.deletions {
            background: rgba(239, 68, 68, 0.15);
            color: var(--color-error);
        }
        
        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(20px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        .animate-fade-in-up {
            animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }
        
        .animate-slide-in-right {
            animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }
        
        /* Loading animation */
        .loading-dots::after {
            content: '';
            animation: loading-dots 1.5s infinite;
        }
        
        @keyframes loading-dots {
            0%, 20% { content: ''; }
            40% { content: '.'; }
            60% { content: '..'; }
            80%, 100% { content: '...'; }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        
        ::-webkit-scrollbar-track {
            background: var(--color-neutral-800);
            border-radius: 4px;
        }
        
        ::-webkit-scrollbar-thumb {
            background: var(--color-neutral-600);
            border-radius: 4px;
        }
        
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-neutral-500);
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .button-primary {
                padding: 0.875rem 1.5rem;
                font-size: 0.9rem;
            }
            
            .input-field {
                min-height: 250px;
            }
            
            .diff-line {
                font-size: 0.75rem;
            }
            
            .diff-line-number {
                width: 40px;
            }
        }
        
        /* Focus management for accessibility */
        .focus-visible:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        
        /* High contrast mode support */
        @media (prefers-contrast: high) {
            .card {
                border-width: 2px;
            }
            
            .input-field:focus {
                border-width: 2px;
            }
        }
        
        /* Reduced motion support */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }