.dropdown-block {
    display: inline-block;
    position: relative
}

.dropdown-content {
    position: absolute;
    z-index: 15000;
    left: 0;
    top: 100%;
    display: none
}

.dropdown-button {
    display: inline-block
}

.dropdown-block:hover .dropdown-content {
    display: block
}

.dropdown-group {
    display: inline-block
}