/* unterstrich */

#header.header-underscore{
    .navbar a,
    .navbar a:focus {
        background-image: linear-gradient(rgba(var(--bs-rm-nav-link-hover-color-rgb),1), rgba(var(--bs-rm-nav-link-hover-color-rgb),1));
        /*↓ height of underline  */
        background-size: 0% 1px;
        /* ↓ y position of underline. you can change as 50% to see it. */
        background-position: 0% 70%;
        background-repeat: no-repeat;
        transition: background 0.3s linear;
    }
    .navbar a:hover,
    .navbar .active,
    .navbar .active:focus,
    .navbar li:hover>a {
        background-size: 100% 1px;
    }
    .navbar .dropdown ul a {
        /* ↓ height of underline  */
        background-size: 0% 2px;
        /* ↓ y position of underline. you can change as 50% to see it. */
        background-position: 0% 70%;
        background-repeat: no-repeat;
        transition: background 0.3s linear;
    }
}