.catalog-item {
    position: relative;
}

.invalid-prices-ribbon {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    overflow: hidden;
}

.invalid-prices-ribbon::before {
    content: "Preise ungültig";
    position: absolute;
    display: block;
    width: 200%;
    padding: 5px 0;
    background-color: #ff0000;
    color: white;
    font-weight: bold;
    text-align: center;
    text-transform: uppercase;
    font-size: 14px;
    transform: rotate(-45deg);
    top: 10em;
    left: -50%;
    box-shadow: 0 3px 10px rgba(0,0,0,0.3);
}