/* style/app.css */
        :root {
            --color-primary: #FFD700; /* Vàng */
            --color-secondary: #FFFFFF; /* Trắng */
            --color-background: #000000; /* Đen */
            --color-text-dark: #333333;
            --color-cta-bg: #2563eb; /* Màu xanh từ thông tin trang web */
            --color-cta-text: #FFFFFF;
        }

        .page-app {
            background-color: var(--color-background);
            color: var(--color-secondary);
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            overflow-x: hidden; /* Ngăn chặn tràn ngang */
        }

        .page-app__container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
            box-sizing: border-box;
        }

        .page-app__section {
            padding: 40px 0;
            text-align: center;
        }

        .page-app__hero-section {
            padding-top: 10px; /* Nhỏ hơn để tránh đệm kép với body padding-top */
            padding-bottom: 20px;
            background-color: #000000;
            text-align: center;
        }

        .page-app__hero-image {
            width: 100%;
            max-width: 1200px;
            height: auto;
            display: block;
            margin: 0 auto 20px auto;
            border-radius: 8px;
        }

        .page-app__hero-content {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .page-app__hero-content h1 {
            color: var(--color-primary);
            font-weight: bold;
            margin-bottom: 15px;
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .page-app__hero-content p {
            color: var(--color-secondary);
            font-size: 1.1em;
            margin-bottom: 25px;
        }

        .page-app__btn {
            display: inline-block;
            background-color: var(--color-primary);
            color: var(--color-background);
            padding: 12px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1em;
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
            max-width: 100%;
            box-sizing: border-box;
            white-space: normal;
            word-wrap: break-word;
        }

        .page-app__btn:hover {
            background-color: #e6c200;
            transform: translateY(-2px);
        }

        .page-app__btn-container {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
            width: 100%;
            max-width: 100%;
            box-sizing: border-box;
            overflow: hidden;
        }

        .page-app__title {
            color: var(--color-primary);
            font-size: 2.5em;
            margin-bottom: 30px;
            font-weight: bold;
            text-transform: uppercase;
        }

        .page-app__text-block {
            max-width: 900px;
            margin: 0 auto 30px auto;
            color: var(--color-secondary);
            font-size: 1.05em;
        }

        .page-app__text-block h3 {
            color: var(--color-primary);
            margin-top: 25px;
            margin-bottom: 15px;
        }

        .page-app__features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .page-app__feature-card {
            background-color: #1a1a1a;
            border-radius: 12px;
            padding: 25px;
            text-align: left;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            transition: transform 0.3s ease;
            border: 1px solid rgba(255, 215, 0, 0.2);
        }

        .page-app__feature-card:hover {
            transform: translateY(-5px);
        }

        .page-app__feature-card h3 {
            color: var(--color-primary);
            font-size: 1.4em;
            margin-bottom: 15px;
        }

        .page-app__feature-card p {
            color: var(--color-secondary);
            font-size: 0.95em;
        }

        .page-app__games-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .page-app__game-card {
            background-color: #1a1a1a;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            transition: transform 0.3s ease;
            border: 1px solid rgba(255, 215, 0, 0.2);
            text-decoration: none;
            color: var(--color-secondary);
            display: flex;
            flex-direction: column;
        }

        .page-app__game-card:hover {
            transform: translateY(-5px);
        }

        .page-app__game-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .page-app__game-card-content {
            padding: 15px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .page-app__game-card-content h3 {
            color: var(--color-primary);
            font-size: 1.2em;
            margin-bottom: 10px;
        }

        .page-app__game-card-content p {
            font-size: 0.9em;
            line-height: 1.4;
        }

        .page-app__download-steps {
            max-width: 800px;
            margin: 0 auto;
            text-align: left;
        }

        .page-app__step-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 30px;
        }

        .page-app__step-item:last-child {
            margin-bottom: 0;
        }

        .page-app__step-number {
            background-color: var(--color-primary);
            color: var(--color-background);
            width: 40px;
            height: 40px;
            min-width: 40px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: bold;
            font-size: 1.3em;
            margin-right: 20px;
        }

        .page-app__step-content h3 {
            color: var(--color-primary);
            margin-top: 0;
            margin-bottom: 10px;
        }

        .page-app__step-content p {
            color: var(--color-secondary);
        }

        .page-app__providers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 20px;
            max-width: 1000px;
            margin: 0 auto;
            align-items: center;
            justify-items: center;
        }

        .page-app__provider-logo {
            width: 100%;
            max-width: 120px;
            height: auto;
            display: block;
            filter: brightness(0.8) grayscale(0.2); /* Làm mờ nhẹ logo */
            transition: filter 0.3s ease;
        }

        .page-app__provider-logo:hover {
            filter: brightness(1) grayscale(0); /* Sáng hơn khi hover */
        }

        .page-app__faq-list {
            max-width: 900px;
            margin: 0 auto;
            text-align: left;
        }

        .page-app__faq-item {
            background-color: #1a1a1a;
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 215, 0, 0.1);
        }

        .page-app__faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            cursor: pointer;
            user-select: none;
            background-color: #222222;
            color: var(--color-primary);
            font-weight: bold;
            font-size: 1.1em;
            transition: background-color 0.3s ease;
        }

        .page-app__faq-question:hover {
            background-color: #333333;
        }

        .page-app__faq-question h3 {
            margin: 0;
            color: inherit;
            pointer-events: none;
            flex-grow: 1;
        }

        .page-app__faq-toggle {
            font-size: 1.5em;
            line-height: 1;
            margin-left: 15px;
            pointer-events: none;
            transition: transform 0.3s ease;
        }

        .page-app__faq-item.active .page-app__faq-toggle {
            transform: rotate(45deg);
        }

        .page-app__faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 20px;
            opacity: 0;
            color: var(--color-secondary);
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        }

        .page-app__faq-item.active .page-app__faq-answer {
            max-height: 2000px !important; /* Đảm bảo đủ cao cho nội dung */
            padding: 20px !important;
            opacity: 1;
        }

        .page-app__floating-button {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: var(--color-cta-bg);
            color: var(--color-cta-text);
            padding: 15px 25px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1em;
            box-shadow: 0 5px 20px rgba(37, 99, 235, 0.6);
            z-index: 1000;
            transition: background-color 0.3s ease, transform 0.3s ease;
            text-align: center;
            max-width: calc(100% - 40px); /* Đảm bảo nút không tràn */
            box-sizing: border-box;
            white-space: normal;
            word-wrap: break-word;
        }

        .page-app__floating-button:hover {
            background-color: #1e50c4;
            transform: translateY(-3px);
        }

        /* Responsive styles */
        @media (max-width: 1024px) {
            .page-app__title {
                font-size: 2em;
            }
            .page-app__hero-content h1 {
                font-size: 2.2em;
            }
            .page-app__btn {
                padding: 10px 25px;
                font-size: 1em;
            }
            .page-app__features-grid,
            .page-app__games-grid,
            .page-app__providers-grid {
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .page-app {
                font-size: 16px;
                line-height: 1.6;
            }
            .page-app__hero-section {
                padding-top: 10px !important; /* Giữ padding nhỏ */
                padding-bottom: 15px;
            }
            .page-app__hero-content h1 {
                font-size: 1.8em;
                margin-bottom: 10px;
            }
            .page-app__hero-content p {
                font-size: 1em;
                margin-bottom: 20px;
            }
            .page-app__btn {
                padding: 10px 20px;
                font-size: 0.95em;
            }
            .page-app__btn-container {
                flex-direction: column;
                gap: 15px;
                padding: 0 15px;
            }
            .page-app__btn,
            .page-app a[class*="button"],
            .page-app a[class*="btn"] {
                max-width: 100% !important;
                width: 100% !important;
                box-sizing: border-box !important;
                white-space: normal !important;
                word-wrap: break-word !important;
                padding-left: 15px;
                padding-right: 15px;
            }
            .page-app__title {
                font-size: 1.8em;
                margin-bottom: 20px;
            }
            .page-app__section {
                padding: 30px 0;
            }
            .page-app__text-block {
                font-size: 1em;
                padding: 0 15px;
            }
            .page-app__features-grid,
            .page-app__games-grid,
            .page-app__providers-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 0 15px;
            }
            .page-app__game-card img {
                height: 180px;
            }
            .page-app__step-item {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .page-app__step-number {
                margin-right: 0;
                margin-bottom: 15px;
            }
            .page-app__faq-list {
                padding: 0 15px;
            }
            .page-app__faq-question,
            .page-app__faq-answer {
                padding-left: 15px !important;
                padding-right: 15px !important;
            }
            .page-app__floating-button {
                bottom: 15px;
                right: 15px;
                padding: 12px 20px;
                font-size: 1em;
                max-width: calc(100% - 30px);
            }
            /* Mobile image adaptation */
            .page-app img {
                max-width: 100% !important;
                width: 100% !important;
                height: auto !important;
                display: block !important;
            }
            .page-app__container,
            .page-app__section,
            .page-app__card,
            .page-app__game-card,
            .page-app__feature-card,
            .page-app__faq-item,
            .page-app__download-steps {
                max-width: 100% !important;
                width: 100% !important;
                box-sizing: border-box !important;
                padding-left: 15px;
                padding-right: 15px;
            }
            .page-app__step-content {
                padding: 0 15px;
            }
            .page-app__providers-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .page-app__providers-grid {
                grid-template-columns: 1fr;
            }
        }