style.scss

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: inherit;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;

    font-family: sans-serif;
    height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    border: 1px solid black;
    position: relative;
    padding: 10px;

    max-width: 500px;

    .item {
        padding: 20px 100px;
        border: 1px solid blue;
        user-select: none;

        transition-property: transform, background-color;
        transition-duration: 0.2s;
        transition-timing-function: cubic-bezier(0.165, 0.84, 0.44, 1);

        &:not(:last-of-type) {
            margin-bottom: 10px;
        }

        &:hover {
            background: rgba(0, 0, 0, 0.089);
        }

        &.dragging {
            outline: 2px dashed red;
            border: 1px solid transparent;
        }

        &.pseudo {
            position: absolute;
            opacity: 0.5;
        }

        &.preview {
            background:rgba(0, 0, 0, 0.089);
            border: 1px solid transparent;
        }
    }
}