html {
    overflow:hidden;
}

body {
    background-image: linear-gradient(to top right, black , #444444);
    background-repeat: no-repeat;
    margin: 0 auto;
    color: white;
    font-family: sans-serif;
    font-size:18px;
}

/* wraps around the complete inner page (including header and without footer) */
#page-wrapper {
    background-image: url("/user/images/background-lines3.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
}

.grey-background { background: rgba(76, 76, 76, 0.3); }

a:link, a:visited {
    color: orange;
    text-decoration: none;
}

.showcase_card {
    margin:5px;
    padding: 0px 15px 0px 15px; /* top right bottom left */
    color: #CCCCCC;
}

.showcase_card h3 {
    color: white;
}

.showcase_outer_box {

}

.showcase_outer_frame {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.showcase_outer_frame img {
    height: 300px; /* height of Uwe-Foto */
}

.showcase_logo {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    min-height: 300px;
    margin-bottom: 20px;
}

.showcase_logo img {
    height: 70px; /* height of R-logo */
}

.showcase_logo h1 {
    color: white;
}

.showcase_footer {
    display: grid;
    grid-template-columns: auto auto;
}

.showcase_footer a {
    color: #ADB3C1;
}

.impressum {
    color: lightgrey;
    font-size: 10px;
}

.impressum h2 {
    font-size: 12px;
    color:white;
}

@media screen and (min-width : 600px) {
    /* use three showcase cards horizontal on bigger screens */
    .showcase_card {
        width:calc((100% - 60px)/3); /* each card uses one third of the available space */
    }
}

@media screen and (min-width : 1000px) {
    /* use large margin on large screens */
    .showcase_logo {
        margin-left: 120px;
    }
}