.content-container{
    background-color: #F5F5F5;
    border-radius: 8px;
}

/* Unter Desktop */
.w-xl-75 { width: 95%; }
main { margin-left: 0; }

/* Ab Desktop (Bootstrap "xl" = ≥1200px) */
@media (min-width: 1200px) {
    .w-xl-75 { width: 75%; }
    main { margin-left: 12vw; }
}