:root {
            --primary-color: #4a6fa5;
            --accent-color: #ff6b6b;
            --home-color: #2196F3;
            --back-color: #4a6fa5;
            --full-win-color: #4CAF50;
            --full-full-color: #f44336;
            --shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
            --transition: all 0.2s ease;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: #1e1f22;
            height: 100vh;
            width: 100vw;
            overflow: hidden;
            position: fixed;
            top: 0;
            left: 0;
        }

        main {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 1;
        }

        .iframe-container {
            width: 100%;
            height: 100%;
            border: none;
            overflow: hidden;
            background: #fff;
        }

        .iframe-container iframe {
            width: 100%;
            height: 100%;
            border: none;
            display: block;
            background: #fff;
        }

        .floating-wrapper {
            position: fixed;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            z-index: 9999;
            pointer-events: none; 
        }

        .floating-wrapper.desktop-layout {
            bottom: 20px;
            right: 40px;
        }

        @media (max-width: 768px) {
            .floating-wrapper {
                top: 16px;
                right: 16px;
                bottom: auto;
                left: auto;
            }
        }

        .floating-buttons {
            display: flex;
            flex-direction: row;
            gap: 10px;
            background: transparent;
            pointer-events: none;
        }

        .float-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
            border: none;
            outline: none;
            backdrop-filter: blur(6px);
            font-weight: 500;
            pointer-events: auto;
            background-color: rgba(30, 30, 40, 0.65);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .home-button {
            background-color: rgba(33, 150, 243, 0.7);
        }
        .home-button:hover {
            background-color: rgba(33, 150, 243, 0.9);
            transform: scale(1.05);
        }

        .back-button {
            background-color: rgba(74, 111, 165, 0.7);
        }
        .back-button:hover {
            background-color: rgba(74, 111, 165, 0.9);
            transform: scale(1.05);
        }

        .fullscreen-button {
            background-color: rgba(76, 175, 80, 0.7);
        }
        .fullscreen-button:hover {
            transform: scale(1.05);
        }

        body:fullscreen .fullscreen-button,
        body:-webkit-full-screen .fullscreen-button,
        body:-moz-full-screen .fullscreen-button {
            background-color: rgba(244, 67, 54, 0.85) !important;
            box-shadow: 0 0 6px rgba(244, 67, 54, 0.5);
        }

        .float-btn:active {
            transform: scale(0.92);
        }

        .copyright-info {
            font-size: 11px;
            color: #3b82f6;  
            text-align: right;
            letter-spacing: 0.3px;
            margin-top: 8px;
            font-family: 'Segoe UI', Roboto, system-ui, sans-serif;
            font-weight: 500;
            text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
            white-space: nowrap;
            pointer-events: none;
            user-select: none;
            backdrop-filter: none;
            background: transparent;
            border: none;
            line-height: 1.3;
        }

        @media (max-width: 768px) {
            .copyright-info {
                display: none !important;
            }
        }

        @media (min-width: 769px) {
            .float-btn {
                width: 38px;
                height: 38px;
                font-size: 19px;
            }
            .copyright-info {
                margin-top: 10px;
                font-size: 11px;
            }
        }

        @media (max-width: 768px) {
            .float-btn {
                width: 34px;  
                height: 34px;
                font-size: 17px;
                background-color: rgba(30, 30, 40, 0.7);
                backdrop-filter: blur(8px);
            }

            .home-button {
                background-color: rgba(33, 150, 243, 0.7);
            }
            .home-button:hover {
                background-color: rgba(33, 150, 243, 0.9);
            }

            .back-button.mobile-hidden {
                display: none !important;
            }
            .floating-wrapper {
                gap: 0;
                top: 16px;
                right: 16px;
                bottom: auto;
                left: auto;
            }
            .floating-buttons {
                gap: 8px;
            }
        }

        @media (max-width: 480px) {
            .float-btn {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .floating-wrapper {
                top: 12px;
                right: 12px;
            }
            .floating-buttons {
                gap: 7px;
            }
        }

        body:fullscreen .floating-wrapper,
        body:-webkit-full-screen .floating-wrapper,
        body:-moz-full-screen .floating-wrapper {
            z-index: 2147483647;
        }

        .iframe-loading {
            position: fixed;
            bottom: 20px;
            left: 20px;
            background: rgba(0, 0, 0, 0.55);
            backdrop-filter: blur(4px);
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 11px;
            font-family: monospace;
            pointer-events: none;
            z-index: 10000;
            opacity: 0;
            transition: opacity 0.2s;
        }
        .iframe-loading.show {
            opacity: 1;
        }