#background {
    position: relative;
}

    #background #top_corner {
        position: fixed;
        top: 0px;
        left: 0px;
        width: 25%;
        max-width: 468px;
    }

    #background #bottom_corner {
        position: fixed;
        bottom: 0px;
        right: 0px;
        width: 25%;
        max-width: 375px;
    }

#content_wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 1vw;
}

    #content_wrapper:before {
        content: '';
        display: inline-block;
        height: 100%;
        vertical-align: middle;
    }

    #content_wrapper #content {
        height: 50%;
        width: 50%;
        background-color: #FFFFFF;
        display: inline-block;
        vertical-align: middle;
    }


        #content_wrapper #content #icon {
            display: block;
            margin: 0 auto;
            width: 25%;
            max-width: 142px;
        }

        #content_wrapper #content #logo {
            padding-top: 2em;
            display: block;
            margin: 0 auto;
            width: 50%;
            max-width: 241px;
        }

        #content_wrapper #content #line {
            padding-top: 2em;
            padding-bottom: 2em;
            display: block;
            margin: 0 auto;
            width: 75%;
            max-width: 393px;
        }

@media all and (max-width: 750px) {

    #content_wrapper {
        font-size: 2vw;
    }

        #content_wrapper #content {
            height: 50%;
            width: 75%;
            background-color: #FFFFFF;
            display: inline-block;
            vertical-align: middle;
        }

    #background #top_corner {
        width: 50%;
    }

    #background #bottom_corner {
        width: 50%;
    }
}

@media all and (max-width: 750px) and (orientation : landscape) {

    #content_wrapper {
        font-size: 1vw;
    }

        #content_wrapper #content {
            height: 50%;
            width: 50%;
            background-color: #FFFFFF;
            display: inline-block;
            vertical-align: middle;
        }

    #background #top_corner {
        width: 25%;
    }

    #background #bottom_corner {
        width: 25%;
    }
}