:root {
            --primary-color: #e91e63;
            --secondary-color: #ff4081;
            --dark-color: #c2185b;
            --light-color: #f8bbd0;
            --text-color: #2c3e50;
            --bg-color: #fafbfc;
            --button-hover: #d81b60;
            --success-color: #4CAF50;
            --border-color: #e1e8ed;
            --shadow-light: 0 2px 10px rgba(0,0,0,0.08);
            --shadow-medium: 0 4px 20px rgba(0,0,0,0.12);
            --shadow-heavy: 0 8px 30px rgba(0,0,0,0.15);
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background: linear-gradient(135deg, #ffeef3 0%, #fff5f8 100%);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }
        
        .navbar {
            background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
            padding: 0;
            box-shadow: var(--shadow-medium);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(10px);
            width: 100%;
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
            position: relative;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            transition: var(--transition);
        }
        
        .nav-links li {
            margin: 0 10px;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 10px;
            z-index: 1000;
        }
        
        .hamburger span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 5px 0;
            transition: var(--transition);
        }
        
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }
        
        .logo-text {
            color: white;
            font-size: 1.5rem;
            font-weight: 600;
            text-decoration: none;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
            display: inline-block;
            z-index: 1000;
            padding: 8px 16px;
            border-radius: 8px;
            transition: var(--transition);
        }
        
        .logo-text:hover {
            transform: translateY(-1px);
            text-shadow: 0 4px 8px rgba(0,0,0,0.3);
        }
        
        .container {
            max-width: 900px;
            width: 95%;
            margin: 30px auto;
            padding: 32px;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-medium);
            overflow: hidden;
            position: relative;
        }
        
        .container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        }
        
        h1 {
            color: var(--primary-color);
            text-align: center;
            margin: 0 0 40px;
            font-size: 2.2rem;
            font-weight: 700;
            font-family: 'Dancing Script', cursive;
            word-wrap: break-word;
            text-shadow: 0 2px 4px rgba(233, 30, 99, 0.1);
        }
        
        h3 {
            color: var(--text-color);
            font-size: 1.3rem;
            font-weight: 600;
            margin: 32px 0 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        h3::before {
            content: '';
            width: 4px;
            height: 20px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        textarea, input[type="number"] {
            width: 100%;
            padding: 16px;
            margin-bottom: 20px;
            border: 2px solid var(--border-color);
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
            background: #fafbfc;
        }
        
        textarea:focus, input[type="number"]:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.1);
            background: white;
        }
        
        textarea {
            min-height: 100px;
            resize: vertical;
            font-family: inherit;
        }
        
        .input-box {
            margin: 20px 0;
        }
        
        .checkbox-group {
            display: flex;
            align-items: center;
            margin: 16px 0;
            flex-wrap: wrap;
            padding: 12px 16px;
            background: #f8f9fa;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        
        .checkbox-group:hover {
            background: #f1f3f4;
        }
        
        .checkbox-group input[type="checkbox"],
        .checkbox-group input[type="radio"] {
            margin-right: 12px;
            width: 20px;
            height: 20px;
            accent-color: var(--primary-color);
            cursor: pointer;
        }
        
        .checkbox-group label {
            font-size: 1rem;
            cursor: pointer;
            font-weight: 500;
            user-select: none;
        }
        
        .button-group {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
            margin: 32px 0;
        }
        
        button {
            background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
            color: white;
            border: none;
            padding: 16px 32px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            min-width: 200px;
            flex-grow: 1;
            max-width: 100%;
            box-shadow: var(--shadow-light);
            position: relative;
            overflow: hidden;
        }
        
        button::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:hover::before {
            left: 100%;
        }
        
        button:hover {
            background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
            transform: translateY(-2px);
            box-shadow: var(--shadow-medium);
        }
        
        button:active {
            transform: translateY(0);
            box-shadow: var(--shadow-light);
        }
        
        #copiedMessage {
            display: none;
            color: var(--success-color);
            text-align: center;
            margin: 16px 0;
            font-weight: 600;
            font-size: 1rem;
            background: rgba(76, 175, 80, 0.1);
            padding: 16px 24px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-light);
            border: 2px solid rgba(76, 175, 80, 0.2);
        }
        
        .box {
            background: linear-gradient(135deg, #f8f9fa, #ffffff);
            border-left: 4px solid var(--primary-color);
            padding: 20px;
            margin: 16px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            word-wrap: break-word;
            box-shadow: var(--shadow-light);
            transition: var(--transition);
        }
        
        .box:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-medium);
        }
        
        .box a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 8px 0;
            transition: var(--transition);
            font-size: 1.05rem;
        }
        
        .box a:hover {
            color: var(--dark-color);
        }
        
        footer {
            text-align: center;
            padding: 32px 20px;
            margin-top: 40px;
            background: linear-gradient(135deg, #f8f9fa, #ffffff);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }
        
        footer a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }
        
        footer a:hover {
            text-decoration: underline;
        }
        
        .output-container {
            width: 100%;
            min-height: 250px;
            max-height: 400px;
            overflow-y: auto;
            overflow-x: hidden;
            border: 2px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 20px;
            margin: 24px 0;
            background: #fafbfc;
            white-space: pre-wrap;
            font-family: 'Inter', monospace;
            line-height: 1.6;
            cursor: pointer;
            word-break: break-word;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        
        .output-container:hover {
            border-color: var(--primary-color);
            background: white;
        }
        
        .output-container::after {
            content: '💡 Doble clic para copiar';
            position: absolute;
            top: 8px;
            right: 12px;
            font-size: 0.8rem;
            color: #666;
            opacity: 0.7;
        }
        
        #hiddenCopy {
            position: absolute;
            left: -9999px;
            opacity: 0;
        }
        
        .share-buttons {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 12px;
            margin: 24px 0;
        }
        
        .share-button a {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 14px 8px;
            border-radius: var(--border-radius);
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: var(--shadow-light);
        }
        
        .share-button a:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-medium);
        }
        
        .whatsapp { background: linear-gradient(135deg, #25D366, #128C7E); }
        .sms { background: linear-gradient(135deg, #5BC236, #4CAF50); }
        .email { background: linear-gradient(135deg, #EA4335, #D33B2C); }
        .messenger { background: linear-gradient(135deg, #006AFF, #0084FF); }
        .telegram { background: linear-gradient(135deg, #0088CC, #229ED9); }
        
        .emoji-preview {
            font-size: 1.3em;
            margin-left: 8px;
            vertical-align: middle;
            animation: bounce 2s infinite;
        }
        
        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-4px); }
            60% { transform: translateY(-2px); }
        }
        
        .love-messages {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 12px;
            margin: 24px 0;
        }
        
        .love-message {
            background: linear-gradient(135deg, #fce4ec, #f8bbd0);
            padding: 16px;
            border-radius: var(--border-radius);
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 500;
            border: 2px solid transparent;
            box-shadow: var(--shadow-light);
        }
        
        .love-message:hover {
            background: linear-gradient(135deg, #f8bbd0, #f48fb1);
            transform: translateY(-4px);
            box-shadow: var(--shadow-medium);
            border-color: var(--primary-color);
        }
        
        .description-text {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--text-color);
            text-align: center;
            margin: 32px 0;
            padding: 24px;
            background: linear-gradient(135deg, #f8f9fa, #ffffff);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-light);
        }
        
        /* Loading animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(233, 30, 99, 0.3);
            border-radius: 50%;
            border-top-color: var(--primary-color);
            animation: spin 1s ease-in-out infinite;
            margin-right: 8px;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 20px;
                margin: 20px auto;
                width: 98%;
            }
            
            h1 {
                font-size: 1.8rem;
                margin-bottom: 24px;
            }
            
            .button-group {
                flex-direction: column;
                align-items: center;
            }
            
            button {
                width: 100%;
                max-width: 100%;
                min-width: auto;
            }
            
            .share-buttons {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .checkbox-group label {
                font-size: 0.95rem;
            }
            
            .love-messages {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .output-container {
                max-height: 300px;
            }
        }
        
        @media (max-width: 1024px) {
            .hamburger {
                display: block;
            }
            
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 70%;
                max-width: 300px;
                height: 100vh;
                background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
                flex-direction: column;
                justify-content: center;
                align-items: center;
                transition: var(--transition);
                z-index: 999;
                padding: 0;
                margin: 0;
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
            }
            
            .nav-links.active {
                right: 0;
            }
            
            .nav-links li {
                margin: 15px 0;
                width: 100%;
                text-align: center;
            }
            
            .nav-links a {
                display: block;
                padding: 12px 20px;
                width: 100%;
                box-sizing: border-box;
            }
            
            .nav-links a:hover {
                background-color: rgba(255, 255, 255, 0.2);
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 16px;
                margin: 10px auto;
            }
            
            .logo-text {
                font-size: 1.3rem;
            }
            
            h1 {
                font-size: 1.6rem;
            }
            
            textarea, input[type="number"] {
                padding: 12px;
                font-size: 0.95rem;
            }
            
            .share-buttons {
                grid-template-columns: 1fr;
            }
            
            .output-container {
                font-size: 0.9rem;
                padding: 16px;
                max-height: 250px;
            }
            
            .love-messages {
                grid-template-columns: 1fr;
            }
            
            .checkbox-group {
                padding: 10px 12px;
            }
        }
        
        /* Accessibility improvements */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }
        
        /* Focus styles for better accessibility */
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary-color);
            outline-offset: 2px;
        }