CSS - add internal bottom shadow inside HTML element

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<style>

    .element {
        border: 1px solid silver;
        overflow: hidden;
    }
  
    .element::after {
        margin: 0 -10px;
        height: 20px;
        box-shadow: inset rgb(0 0 0 / 5%) 0px -7px 10px;
        display: block;
        content: '';
    }

</style>

<div class="element">
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</div>