nav, footer, .top-b {
        display: none;
    }
    
    .responsive-iframe {
        position: absolute;
        top: 40;
        left: 0;
        bottom: 0;
        right: 0;
        width: 100%;
        height: 85%;
        border: none;
    }
    
    .close {
        position: absolute;
        right: 32px;
        top: 32px;
        width: 32px;
        height: 32px;
        opacity: 0.3;
    }

    .close:hover {
        opacity: 1;
    }

    .close:before, .close:after {
        position: absolute;
        left: 15px;
        content: ' ';
        height: 33px;
        width: 2px;
        background-color: #333;
    }

    .close:before {
        transform: rotate(45deg);
    }

    .close:after {
        transform: rotate(-45deg);
    }