salix/front/core/components/popover/style.scss

.vn-popover {
    display: none;
    z-index: 10;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    color: initial;

    opacity: 0;
    transform: translateY(-.6em);
    transition-property: opacity, transform;
    transition-duration: 200ms;
    transition-timing-function: ease-in-out;

    &.shown {
        transform: translateY(0);
        opacity: 1;
    }
    & > .popover {
        position: absolute;
        box-shadow: 0 .1em .4em rgba(1, 1, 1, .4);
        z-index: 0;

        & > .arrow {
            width: 1em;
            height: 1em;
            margin: -.5em;
            background-color: white;
            box-shadow: 0 .1em .4em rgba(1, 1, 1, .4);
            position: absolute;
            transform: rotate(45deg);
            z-index: -1;
        }
        & > .content {
            border-radius: .1em;
            background-color: white;
            height: inherit;
            overflow: auto;
        }
    }
}