유틸 - 쉐도우

    <style>
        div {
            min-height: 170px;
            margin: 50px;
        }
        body {
            margin-bottom: 500px;
        }
    </style>

    <!-- SHADOWS -->

    <div class="shadow-sm"></div>
    <div class="shadow"></div>
    <div class="shadow-lg rounded-3"></div>
    <div class="shadow-none bg-light"></div>