* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html, body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow: hidden;
            height: 100%;
            width: 100%;
            background-color: #f5f5f5;
        }
        
        .main-container {
            width: 100vw;
            height: 100vh;
            position: relative;
            overflow: hidden;
            background-color: #f5f5f5;
        }
        
        .web-container-wrapper {
            width: 100%;
            height: 100%;
            position: absolute;
            top: 0;
            left: 0;
            overflow: hidden; 
            z-index: 1;
            background-color: #f5f5f5;
        }
        
        .web-container {
            width: 100%;
            height: calc(100% + 45px);  
            position: absolute;
            top: -45px; 
            left: 0;
            border: none;
            background-color: #f5f5f5;
            display: block;
            margin: 0;
            padding: 0;
            overflow-y: auto; 
            overflow-x: auto;
        }
        
        .control-area {
            position: absolute;
            z-index: 99;
            display: flex;
            flex-direction: column;
            align-items: center;
            background: none;
            border: none;
            box-shadow: none;
            pointer-events: auto;    
        }
        
        @media (min-width: 768px) {
            .control-area {
                bottom: 20px;
                right: 40px;
            }
        }
        
        @media (max-width: 767px) {
            .control-area {
                top: 15px;
                right: 15px;
                bottom: auto;
            }
        }
        
        .control-container {
            display: flex;
            justify-content: space-around;
            align-items: center;
            gap: 6px;
            background: none;  
            border: none;  
            box-shadow: none;  
            padding: 0;
            margin: 0;
        }
        
        .control-btn {
            width: 32px;
            height: 32px;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.9);
            font-size: 18px;
            cursor: pointer;
            transition: all 0.2s ease;
            opacity: 0.85;
            background-color: rgba(0, 0, 0, 0.45);
            font-family: Arial, sans-serif;
            font-weight: bold;
            text-decoration: none;
            backdrop-filter: blur(2px);
            box-shadow: 0 1px 4px rgba(0,0,0,0.1);
        }
        
        .control-btn:hover {
            opacity: 1;
            transform: scale(1.08);
            background-color: rgba(0, 0, 0, 0.65);
        }
        
        .home-btn::before {
            content: "⌂";
            font-size: 20px;
        }
        
        .fullscreen-btn::before {
            content: "⛶";
            font-size: 18px;
        }
        
        .fullscreen-btn.compressed {
            background-color: rgba(231, 76, 60, 0.7) !important;
        }
        
        .fullscreen-btn.compressed::before {
            content: "⛶";
            font-size: 18px;
            font-weight: bold;
        }
        
        .return-btn::before {
            content: "↩";
            font-size: 18px;
        }
        
        @media (max-width: 767px) {
            .return-btn {
                display: none;
            }
        }
        
        @media (min-width: 768px) {
            .return-btn {
                display: flex;
            }
        }
        
        .home-btn {
            background-color: rgba(52, 152, 219, 0.65);
        }
        .fullscreen-btn {
            background-color: rgba(46, 204, 113, 0.65);
        }
        .return-btn {
            background-color: rgba(231, 76, 60, 0.65);
        }
        
        .copyright {
            margin-top: 8px;
            font-size: 11px;
            color: rgba(52, 152, 219, 0.85);
            text-align: center;
            font-family: Arial, sans-serif;
            letter-spacing: 0.5px;
            background: none;   
            border: none;   
            box-shadow: none;
            padding: 0;
            pointer-events: none;
            white-space: nowrap;
        }
        
        @media (min-width: 768px) {
            .copyright {
                display: block;
            }
        }
        
        @media (max-width: 767px) {
            .copyright {
                display: none;
            }
        }
        
        body:fullscreen .control-area,
        body:-webkit-full-screen .control-area,
        body:-moz-full-screen .control-area,
        body:-ms-fullscreen .control-area {
            position: fixed;
        }
        
        @media (max-width: 480px) {
            .control-btn {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }
            .home-btn::before, .fullscreen-btn::before {
                font-size: 16px;
            }
            .fullscreen-btn.compressed::before {
                font-size: 15px;
            }
            .control-container {
                gap: 5px;
            }
        }
        
        .main-container:-webkit-full-screen .web-container-wrapper,
        .main-container:fullscreen .web-container-wrapper {
            overflow: hidden;
        }