* {
    box-sizing: border-box;
}
body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
    margin: 0;
}
#main_questionservice {
    display: flex;
    flex: 1;
}
#main_questionservice > article {
    flex: 1;
}
#main_questionservice > nav,
#main_questionservice > aside {
    flex: 0 0 20vw;
    background: beige;
}
#main_questionservice > nav {
    order: -1;
}
header, footer {
    background: yellowgreen;
    height: 20vh;
}
header, footer, article, nav, aside {
    padding: 1em;
}

/*
@media screen and (max-width: 575px) {
    #main {
        display: block;
    }
} */

@media (max-aspect-ratio: 3/3)  {
    #main_questionservice {
        display: block;
    }
    .lettoimage {
        min-width: 80%;
    }
}


/*
Styling für Wait-Dialog mit js: block_screen
 */
.loading {
    opacity: 70%;
    background-color: lightskyblue;
    position: absolute;
    top: 0px;
    left: 0px;
    z-index: 10;
}
.waiticon {
    position: absolute;
    border: 10px solid #f3f3f3; /* Light grey */
    border-top: 10px solid blue; /* Blue */
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 2s linear infinite;
}

body {
   /* background: #eff3f3; */
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* unvisited link */
.link {
    color: blue;
}
/* visited link */
.link:visited {
    color: #095484;
}
/* mouse over link */
.link:hover {
    color: #b000ff;
}
/* selected link */
.link:active {
    color: #800000;
}

.nolinebreak {
    white-space: nowrap;
}