.vertical-tabs__menu
{
    margin: -1px 0 -1px;
    /* LTR */
    padding: 0;
}

[dir='rtl'] .vertical-tabs__menu
{
    margin-right: -1em;
    margin-left: 0;
    /* This is required to win specificity over [dir="rtl"] .region-content ul */
    padding: 0;
}

.vertical-tabs
{
    font-size: .875rem;

    display: flex;
    flex-direction: row;

    margin: 0;
    /* LTR */

    border: 1px solid #ceced8;
}

[dir='rtl'] .vertical-tabs
{
    flex-direction: row-reverse;

    margin-right: 0;
    margin-left: 0;
}

.vertical-tabs__menu
{
    display: flex;
    flex-direction: column;
    /* LTR */

    width: 15em;
    margin: 0;
    /* LTR */
    padding: 0;

    list-style: none;

    border-top: 1px solid #ceced8;

    flex-wrap: nowrap;
}

[dir='rtl'] .vertical-tabs__menu
{
    margin-right: -15em;
    margin-left: 0;
}

.vertical-tabs__pane
{
    margin: 0;

    border: 0;
}

.vertical-tabs__pane > summary
{
    display: none;
}

.vertical-tabs__menu-item
{
    border: 1px solid #ceced8;
    border-top: 0;
    background: #eee;
}

.vertical-tabs__menu-item a
{
    display: block;

    padding: .5em .6em;

    text-decoration: none;
}

.vertical-tabs__menu-item a:focus .vertical-tabs__menu-item-title,
.vertical-tabs__menu-item a:active .vertical-tabs__menu-item-title,
.vertical-tabs__menu-item a:hover .vertical-tabs__menu-item-title
{
    text-decoration: underline;
}

.vertical-tabs__menu-item a:hover
{
    outline: 1px dotted;
}

.vertical-tabs__menu-item.is-selected
{
    border-right-width: 0;
    /* LTR */
    background-color: #fff;
}

[dir='rtl'] .vertical-tabs__menu-item.is-selected
{
    border-right-width: 1px;
    border-left-width: 0;
}

.vertical-tabs__menu-item.is-selected .vertical-tabs__menu-item-title
{
    color: #000;
}

.vertical-tabs__menu-item-summary
{
    line-height: normal;

    display: block;

    margin-bottom: 0;
}