    <style>
        /* ДЕМО стилі - не частина системи попапів */
        .demo-page {
            font-family: 'Open Sans', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f7fa;
            padding: 40px 20px;
            margin: 0;
            min-height: 100vh;
        }

        .demo-container {
            max-width: 600px;
            margin: 0 auto;
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            text-align: center;
        }

        .demo-container h1 {
            color: #102542;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .demo-container p {
            margin-bottom: 20px;
            color: #666;
        }

        /* ===== ECAD-MCAD POPUP SYSTEM - УНІВЕРСАЛЬНИЙ КОД ===== */
        /* Усі стилі ізольовані та не конфліктують з іншими */
        
        /* Спеціальний стиль для лінків, що відкривають попап */
        .ecadmcad-popup-trigger-link {
            color: #54c2c0 !important;
            text-decoration: none !important;
            position: relative !important;
            cursor: pointer !important;
            transition: all 0.3s ease !important;
            font-weight: 500 !important;
            background: linear-gradient(90deg, #54c2c0 50%, transparent 50%) !important;
            background-size: 4px 2px !important;
            background-repeat: repeat-x !important;
            background-position: 0 100% !important;
            padding-bottom: 2px !important;
            display: inline-block !important;
            margin: 0 5px !important;
            border: none !important;
            outline: none !important;
            box-sizing: border-box !important;
        }

        .ecadmcad-popup-trigger-link:hover {
            color: #48a5a3 !important;
            background-image: linear-gradient(90deg, #48a5a3 50%, transparent 50%) !important;
            background-size: 6px 2px !important;
            transform: translateY(-1px) !important;
            text-decoration: none !important;
        }

        .ecadmcad-popup-trigger-link:active {
            transform: translateY(0) !important;
        }

        .ecadmcad-popup-trigger-link:visited {
            color: #54c2c0 !important;
        }

        .ecadmcad-popup-trigger-link:focus {
            outline: 2px solid #54c2c0 !important;
            outline-offset: 2px !important;
        }

        /* Основний контейнер попапа */
        .ecadmcad-popup-overlay-container {
            position: fixed !important;
            top: 0 !important;
            left: 0 !important;
            width: 100% !important;
            height: 100% !important;
            background-color: rgba(12, 18, 30, 0.9) !important;
            backdrop-filter: blur(8px) !important;
            -webkit-backdrop-filter: blur(8px) !important;
            z-index: 999999 !important;
            display: flex !important;
            align-items: center !important;
            justify-content: center !important;
            opacity: 0 !important;
            visibility: hidden !important;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
            padding: 40px 20px !important;
            margin: 0 !important;
            border: none !important;
            box-sizing: border-box !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
        }

        .ecadmcad-popup-overlay-container.ecadmcad-popup-active {
            opacity: 1 !important;
            visibility: visible !important;
        }

        /* Скидання всіх можливих успадкувань */
        .ecadmcad-popup-overlay-container,
        .ecadmcad-popup-overlay-container *,
        .ecadmcad-popup-content-wrapper,
        .ecadmcad-popup-content-wrapper * {
            box-sizing: border-box !important;
            -webkit-user-select: text !important;
            -moz-user-select: text !important;
            -ms-user-select: text !important;
            user-select: text !important;
        }

        /* Основний блок попапа */
        .ecadmcad-popup-content-wrapper {
            background-color: #ffffff !important;
            border-radius: 6px !important;
            box-shadow: 
                0 25px 50px rgba(0, 0, 0, 0.25),
                0 10px 20px rgba(0, 0, 0, 0.1),
                0 0 0 1px rgba(255, 255, 255, 0.8) !important;
            width: 90vw !important;
            max-width: 800px !important;
            height: calc(100vh - 80px) !important;
            max-height: calc(100vh - 80px) !important;
            position: relative !important;
            transform: scale(0.8) translateY(50px) !important;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
            overflow: hidden !important;
            display: flex !important;
            flex-direction: column !important;
            padding: 0 !important;
            margin: 0 !important;
            border: none !important;
            outline: none !important;
        }

        .ecadmcad-popup-overlay-container.ecadmcad-popup-active .ecadmcad-popup-content-wrapper {
            transform: scale(1) translateY(0) !important;
        }

        /* Кнопка закриття - ВИПРАВЛЕНО: тільки одне коло */
        .ecadmcad-popup-close-button {
            position: absolute !important;
            top: 20px !important;
            right: 25px !important;
            width: 48px !important;
            height: 48px !important;
            border: 2px solid #54c2c0 !important;
            background: transparent !important;
            border-radius: 50% !important;
            cursor: pointer !important;
            display: flex !important;
            align-items: center !important;
            justify-content: center !important;
            transition: all 0.3s ease !important;
            z-index: 10 !important;
            font-size: 0 !important;
            padding: 0 !important;
            margin: 0 !important;
            line-height: 1 !important;
            transform-origin: center center !important;
            outline: none !important; /* ВИДАЛЯЄМО outline повністю */
            -webkit-user-select: none !important;
            -moz-user-select: none !important;
            -ms-user-select: none !important;
            user-select: none !important;
            touch-action: manipulation !important;
            -webkit-touch-callout: none !important;
            box-shadow: none !important; /* ВИДАЛЯЄМО box-shadow */
        }

        /* SVG іконка для кнопки закриття */
        .ecadmcad-popup-close-button::before {
            content: '' !important;
            width: 24px !important;
            height: 24px !important;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2354c2c0' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'%3E%3C/line%3E%3Cline x1='6' y1='6' x2='18' y2='18'%3E%3C/line%3E%3C/svg%3E") !important;
            background-repeat: no-repeat !important;
            background-position: center !important;
            background-size: 24px 24px !important;
            display: block !important;
            transition: all 0.3s ease !important;
        }

        /* ВИДАЛЯЄМО всі псевдоелементи після */
        .ecadmcad-popup-close-button::after {
            display: none !important;
            content: none !important;
        }

        .ecadmcad-popup-close-button:hover {
            background: #54c2c0 !important;
            transform: rotate(90deg) scale(1.1) !important;
            border-color: #54c2c0 !important;
            outline: none !important; /* ВИДАЛЯЄМО outline при hover */
            box-shadow: none !important; /* ВИДАЛЯЄМО box-shadow при hover */
        }

        .ecadmcad-popup-close-button:hover::before {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'%3E%3C/line%3E%3Cline x1='6' y1='6' x2='18' y2='18'%3E%3C/line%3E%3C/svg%3E") !important;
        }

        .ecadmcad-popup-close-button:active {
            transform: rotate(90deg) scale(0.95) !important;
            outline: none !important; /* ВИДАЛЯЄМО outline при active */
            box-shadow: none !important; /* ВИДАЛЯЄМО box-shadow при active */
        }

        .ecadmcad-popup-close-button:focus {
            outline: none !important; /* ВИДАЛЯЄМО outline при focus */
            box-shadow: none !important; /* ВИДАЛЯЄМО box-shadow при focus */
        }

        /* ДОДАТКОВО: видаляємо всі можливі outline та box-shadow */
        .ecadmcad-popup-close-button:focus-visible {
            outline: none !important;
            box-shadow: none !important;
        }

        /* Тіло попапа */
        .ecadmcad-popup-body-content {
            padding: 30px 30px 0 30px !important;
            height: 100% !important;
            overflow-y: auto !important;
            position: relative !important;
            background: transparent !important;
            margin: 0 !important;
            border: none !important;
            outline: none !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            font-size: 16px !important;
            line-height: 1.6 !important;
            color: #333 !important;
        }

        /* Відступ для останнього елемента */
        .ecadmcad-popup-body-content > *:last-child {
            margin-bottom: 30px !important;
            padding-bottom: 0 !important;
        }

        /* Кастомний скролбар */
        .ecadmcad-popup-body-content::-webkit-scrollbar {
            width: 6px !important;
        }

        .ecadmcad-popup-body-content::-webkit-scrollbar-track {
            background: #f1f1f1 !important;
            border-radius: 3px !important;
        }

        .ecadmcad-popup-body-content::-webkit-scrollbar-thumb {
            background: #54c2c0 !important;
            border-radius: 3px !important;
        }

        .ecadmcad-popup-body-content::-webkit-scrollbar-thumb:hover {
            background: #48a5a3 !important;
        }

        /* HTMX індикатор завантаження */
        .ecadmcad-popup-body-content .htmx-indicator {
            display: none !important;
            text-align: center !important;
            padding: 40px !important;
            color: #666 !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            margin: 0 !important;
            border: none !important;
        }

        .ecadmcad-popup-body-content.htmx-request .htmx-indicator {
            display: block !important;
        }

        .ecadmcad-popup-body-content.htmx-request > *:not(.htmx-indicator) {
            opacity: 0.5 !important;
        }

        /* Спінер завантаження */
        .ecadmcad-popup-body-content .ecadmcad-loading-spinner {
            display: inline-block !important;
            width: 24px !important;
            height: 24px !important;
            border: 3px solid rgba(84, 194, 192, 0.3) !important;
            border-radius: 50% !important;
            border-top-color: #54c2c0 !important;
            animation: ecadmcad-spin 1s linear infinite !important;
            margin-right: 10px !important;
            vertical-align: middle !important;
        }

        @keyframes ecadmcad-spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Стилі для завантаженого контенту */
        .ecadmcad-popup-body-content h1,
        .ecadmcad-popup-body-content h2 {
            color: #102542 !important;
            margin-bottom: 20px !important;
            margin-top: 0 !important;
            font-weight: 500 !important;
            font-size: 1.8rem !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            line-height: 1.3 !important;
            padding: 0 !important;
            border: none !important;
        }

        .ecadmcad-popup-body-content h3 {
            color: #102542 !important;
            margin-bottom: 16px !important;
            margin-top: 25px !important;
            font-weight: 500 !important;
            font-size: 1.3rem !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            line-height: 1.3 !important;
            padding: 0 !important;
            border: none !important;
        }

        .ecadmcad-popup-body-content h4 {
            color: #102542 !important;
            margin-bottom: 12px !important;
            margin-top: 20px !important;
            font-weight: 500 !important;
            font-size: 1.1rem !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            line-height: 1.3 !important;
            padding: 0 !important;
            border: none !important;
        }

        .ecadmcad-popup-body-content p {
            margin-bottom: 16px !important;
            margin-top: 0 !important;
            line-height: 1.6 !important;
            color: #333 !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            font-size: 16px !important;
            padding: 0 !important;
            border: none !important;
        }

        .ecadmcad-popup-body-content ul,
        .ecadmcad-popup-body-content ol {
            margin-bottom: 16px !important;
            margin-top: 0 !important;
            padding-left: 20px !important;
            list-style-position: outside !important;
        }

        .ecadmcad-popup-body-content ul {
            list-style-type: disc !important;
        }

        .ecadmcad-popup-body-content ol {
            list-style-type: decimal !important;
        }

        .ecadmcad-popup-body-content li {
            margin-bottom: 8px !important;
            color: #333 !important;
            font-family: 'Open Sans', Arial, sans-serif !important;
            font-size: 16px !important;
            line-height: 1.6 !important;
            padding: 0 !important;
        }

        .ecadmcad-popup-body-content strong,
        .ecadmcad-popup-body-content b {
            font-weight: 600 !important;
            color: inherit !important;
        }

        /* Спеціальний блок з підсвічуванням */
        .ecadmcad-popup-body-content .ecadmcad-popup-highlight-box {
            background: linear-gradient(135deg, rgba(84, 194, 192, 0.1), rgba(84, 194, 192, 0.05)) !important;
            border-left: 4px solid #54c2c0 !important;
            padding: 20px !important;
            margin: 20px 0 !important;
            border-radius: 0 8px 8px 0 !important;
            position: relative !important;
            overflow: hidden !important;
            border-top: none !important;
            border-right: none !important;
            border-bottom: none !important;
        }

        .ecadmcad-popup-body-content .ecadmcad-popup-highlight-box::before {
            content: '' !important;
            position: absolute !important;
            top: 0 !important;
            left: 0 !important;
            width: 100% !important;
            height: 100% !important;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent) !important;
            transform: translateX(-100%) !important;
            transition: transform 0.8s ease !important;
        }

        .ecadmcad-popup-body-content .ecadmcad-popup-highlight-box:hover::before {
            transform: translateX(100%) !important;
        }

        /* Блокування прокрутки сторінки */
        body.ecadmcad-popup-scroll-lock {
            overflow: hidden !important;
            padding-right: var(--ecadmcad-scrollbar-compensation, 0) !important;
        }

        /* Ефект затемнення */
        .ecadmcad-popup-overlay-container::before {
            content: '' !important;
            position: absolute !important;
            top: 0 !important;
            left: 0 !important;
            width: 100% !important;
            height: 100% !important;
            background: radial-gradient(circle at center, transparent 0%, rgba(0,0,0,0.3) 100%) !important;
            opacity: 0 !important;
            transition: opacity 0.4s ease !important;
            z-index: -1 !important;
        }

        .ecadmcad-popup-overlay-container.ecadmcad-popup-active::before {
            opacity: 1 !important;
        }

        /* Адаптивні стилі */
        @media (max-width: 768px) {
            .ecadmcad-popup-overlay-container {
                padding: 40px 15px !important;
            }

            .ecadmcad-popup-content-wrapper {
                width: 95vw !important;
                height: calc(100vh - 80px) !important;
                max-height: calc(100vh - 80px) !important;
            }

            .ecadmcad-popup-close-button {
                width: 42px !important;
                height: 42px !important;
                top: 18px !important;
                right: 20px !important;
                border-width: 2px !important;
            }

            .ecadmcad-popup-close-button::before {
                width: 22px !important;
                height: 22px !important;
                background-size: 22px 22px !important;
            }

            .ecadmcad-popup-body-content {
                padding: 70px 20px 0 20px !important;
            }

            .ecadmcad-popup-body-content > *:last-child {
                margin-bottom: 24px !important;
            }

            .ecadmcad-popup-body-content h1,
            .ecadmcad-popup-body-content h2 {
                font-size: 1.5rem !important;
            }
        }

        @media (max-width: 576px) {
            .ecadmcad-popup-overlay-container {
                padding: 40px 10px !important;
            }

            .ecadmcad-popup-content-wrapper {
                width: 98vw !important;
                height: calc(100vh - 80px) !important;
                max-height: calc(100vh - 80px) !important;
            }

            .ecadmcad-popup-close-button {
                width: 38px !important;
                height: 38px !important;
                top: 15px !important;
                right: 18px !important;
                border-width: 2px !important;
            }

            .ecadmcad-popup-close-button::before {
                width: 20px !important;
                height: 20px !important;
                background-size: 20px 20px !important;
            }

            .ecadmcad-popup-body-content {
                padding: 65px 16px 0 16px !important;
            }

            .ecadmcad-popup-body-content > *:last-child {
                margin-bottom: 20px !important;
            }

            .ecadmcad-popup-body-content h1,
            .ecadmcad-popup-body-content h2 {
                font-size: 1.3rem !important;
            }

            .ecadmcad-popup-body-content h3 {
                font-size: 1.1rem !important;
            }
        }

        /* Спеціальні стилі для landscape орієнтації на мобільних */
        @media screen and (orientation: landscape) and (max-height: 500px) {
            .ecadmcad-popup-overlay-container {
                padding: 10px 20px !important;
            }

            .ecadmcad-popup-content-wrapper {
                height: calc(100vh - 20px) !important;
                max-height: calc(100vh - 20px) !important;
            }

            .ecadmcad-popup-close-button {
                top: 12px !important;
                right: 15px !important;
                width: 36px !important;
                height: 36px !important;
            }

            .ecadmcad-popup-close-button::before {
                width: 18px !important;
                height: 18px !important;
                background-size: 18px 18px !important;
            }

            .ecadmcad-popup-body-content {
                padding: 55px 15px 0 15px !important;
            }

            .ecadmcad-popup-body-content h1,
            .ecadmcad-popup-body-content h2 {
                font-size: 1.2rem !important;
                margin-bottom: 15px !important;
            }
        }

        /* Покращена підтримка мобільних пристроїв */
        @supports (-webkit-touch-callout: none) {
            .ecadmcad-popup-overlay-container {
                -webkit-overflow-scrolling: touch !important;
            }
            
            .ecadmcad-popup-body-content {
                -webkit-overflow-scrolling: touch !important;
            }
        }

        /* Анімації входу та виходу */
        @keyframes ecadmcad-entrance-bounce {
            0% {
                transform: scale(0.3) translateY(50px);
                opacity: 0;
            }
            50% {
                transform: scale(1.05) translateY(-10px);
            }
            70% {
                transform: scale(0.95) translateY(5px);
            }
            100% {
                transform: scale(1) translateY(0);
                opacity: 1;
            }
        }
        
        @keyframes ecadmcad-exit-zoom {
            0% {
                transform: scale(1) translateY(0);
                opacity: 1;
            }
            100% {
                transform: scale(0.8) translateY(30px);
                opacity: 0;
            }
        }

        /* Очищення всіх можливих конфліктів */
        .ecadmcad-popup-content-wrapper::after,
        .ecadmcad-popup-content-wrapper::before,
        .ecadmcad-popup-body-content::after,
        .ecadmcad-popup-body-content::before {
            display: none !important;
            content: none !important;
        }

        .ecadmcad-popup-content-wrapper > div:empty,
        .ecadmcad-popup-body-content > div:empty {
            display: none !important;
        }

        .ecadmcad-popup-content-wrapper > *:not(.ecadmcad-popup-body-content):not(.ecadmcad-popup-close-button) {
            display: none !important;
        }
    </style>