:root {
            --primary-color: #6366f1;
            --primary-dark: #4f46e5;
            --secondary-color: #8b5cf6;
            --accent-color: #06b6d4;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --error-color: #ef4444;
            --background: #f8fafc;
            --card-background: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            min-height: 100vh;
            color: var(--text-primary);
            line-height: 1.6;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
        }

        /* Header */
        .header {
            text-align: center;
            margin-bottom: 3rem;
            color: white;
        }

        .header h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            background: linear-gradient(45deg, #ffffff, #f1f5f9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .header p {
            font-size: 1.25rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Main Content */
        .main-content {
            background: var(--card-background);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .section {
            margin-bottom: 3rem;
        }

        .section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 0.5rem;
        }

        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .card {
            background: var(--card-background);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .card-description {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text-primary);
        }

        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
            background: var(--card-background);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        .btn-secondary {
            background: var(--text-secondary);
            color: white;
        }

        .btn-secondary:hover {
            background: var(--text-primary);
        }

        .btn-group {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }

        /* Results */
        .result {
            background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1rem;
            margin-top: 1rem;
            font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
            font-size: 0.9rem;
            word-break: break-all;
            max-height: 200px;
            overflow-y: auto;
            position: relative;
        }

        .result::before {
            content: 'Resultado';
            position: absolute;
            top: -8px;
            left: 12px;
            background: var(--success-color);
            color: white;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .result-content {
            margin-top: 0.5rem;
        }

        /* Stats */
        .stats {
            background: var(--card-background);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 2rem;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
        }

        .stat-item {
            text-align: center;
            padding: 1rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border-radius: 8px;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            display: block;
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        /* Footer */
        .footer {
            text-align: center;
            color: white;
            opacity: 0.8;
            margin-top: 3rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 1rem;
            }

            .header h1 {
                font-size: 2.5rem;
            }

            .cards-grid {
                grid-template-columns: 1fr;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .btn-group {
                flex-direction: column;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .header h1 {
                font-size: 2rem;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Loading Animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .copy-btn {
            position: absolute;
            top: 0.5rem;
            right: 0.5rem;
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-size: 0.75rem;
            cursor: pointer;
            opacity: 0;
            transition: var(--transition);
        }

        .result:hover .copy-btn {
            opacity: 1;
        }

        .copy-btn:hover {
            background: var(--primary-color);
        }