.dropdown {
    position: relative;
}

.dropdown-toggle::after {
    display: inline-block;
    margin-left: .255em;
    vertical-align: .255em;
    content: "";
    border-top: .3em solid;
    border-right: .3em solid transparent;
    border-bottom: 0;
    border-left: .3em solid transparent;
}

.dropdown-toggle:empty::after {
    margin-left: 0;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    float: left;
    min-width: 10rem;
    padding: .5rem 0;
    margin: .125rem 0 0;
    font-size: 1rem;
    color: #212529;
    text-align: left;
    list-style: none;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0,0,0,.15);
    border-radius: .25rem;
}

.dropdown-menu-right {
    right: 0;
    left: auto;
}

.dropdown-menu[x-placement^=top],
.dropdown-menu[x-placement^=right],
.dropdown-menu[x-placement^=bottom],
.dropdown-menu[x-placement^=left] {
    right: auto;
    bottom: auto;
}

.dropdown-divider {
    height: 0;
    margin: .5rem 0;
    overflow: hidden;
    border-top: 1px solid #e9ecef;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: .25rem 1.5rem;
    clear: both;
    font-weight: 400;
    color: #212529;
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
}

.dropdown-item:hover,
.dropdown-item:focus {
    color: #16181b;
    text-decoration: none;
    background-color: #f8f9fa;
}

.dropdown-item.active,
.dropdown-item:active {
    color: #fff;
    text-decoration: none;
    background-color: #007bff;
}

.dropdown-item.disabled,
.dropdown-item:disabled {
    color: #6c757d;
    pointer-events: none;
    background-color: transparent;
}

.show > .dropdown-menu {
    display: block;
}

.dropdown-menu.show {
    display: block;
}