.stl_element {
    position: relative;
}

@keyframes flash-animation {
    0% { text-shadow: 0 0 0px rgba(232, 21, 56, 0); }
    50% { text-shadow: 0 0 20px rgba(232, 21, 56, 1); }
    100% { text-shadow: 0 0 0px rgba(232, 21, 56, 0); }
}

.flash-animation {
    animation: flash-animation 1.8s ease-out infinite;
}

.stle_counter {
    position: absolute;
    top: -8px;
    right: -8px;
    background: red;
    color: white;
    border-radius: 50%;
    min-width: 18px;
    height: 18px;
    text-align: center;
    line-height: 18px;
    font-size: 12px;
    padding: 0 4px;
    box-sizing: border-box;
    z-index: 100;
}