.shimmer {
    position: relative;
    overflow: hidden;
    background: #e0e0e0;
    border-radius: 4px;
}

    .shimmer::after {
        content: "";
        position: absolute;
        top: 0;
        left: -150px;
        width: 150px;
        height: 100%;
        background: linear-gradient( 90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.6) 50%, rgba(255,255,255,0) 100% );
        animation: shimmer 1.2s infinite;
    }

@keyframes shimmer {
    100% {
        transform: translateX(300%);
    }
}