html, body {
            height: 100%;
            margin: 0;
            padding: 0;
        }

        body {
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }
        
        .container {
            text-align: center;
        }
        .textbox {
            width: 250px;
            height: 50px;
            background-color: rgba(0, 0, 0, 0.5);
            color: white;
            font-size: 14px;
            line-height: 50px;
            margin: 0 15px;
        }

        
        .footer {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 10px;
            text-align: center;
        }
        
        .footer-text {
            font-size: 11px;
            color: gray;
        }
        
        .footer-text a {
            text-decoration: none;
            color: gray;
        }