webpack-bootstrap-ui-kit/src/scss/elements/sidebar.scss

// remove containers for child elements
.sidebar__col {
  margin-bottom: $element-reduced-spacer-y;
  margin-top: $element-reduced-spacer-y;
  position: relative;
}

.content-holder__sidebar {
  .row {
    .container,
    .container-fluid {
      padding: 0;
      width: auto;
    }
  }
}

.page-content-sidebar {
  // Sidebar elements
  .element {
    padding-bottom: ($element-reduced-spacer-y);
    padding-top: ($element-reduced-spacer-y);

    &:first-child {
      padding-top: 0;
    }

    &:last-child {
      padding-bottom: 0;
    }
  }
}

.element__widget {
}

.widget__Site_Widgets_SubmenuWidget {
  .nav-link {
    width: 100%;

    &:hover,
    &:focus,
    &:active,
    &.active {
      color: $sidebar-nav-link-hover-color;
      font-weight: bold;
    }
  }

  .active {
    .nav-link {
      color: $sidebar-nav-link-hover-color;
      font-weight: bold;
    }
  }
}