.filters {
    overflow: hidden;
    margin-bottom: 2em;
}

.filters .ui-group {
    display: flex;
    flex-wrap: wrap;
}

/* ---- button ---- */

.filters .button {
    display: inline-block;
    outline: none;
    padding: 0.5em 1.0em;
    margin-top: 6px;
    border: 1px solid #ccc;
    border-radius: 4px;
    color: #444;
    font-size: 0.9em;
    background-color: white;
    transition: all 0.2s;
}

.filters .button:hover {
    background-color: #ccc;
    color: black;
}

.filters .button:active,
.filters .button.is-checked {
    background-color: #444;
    border: 1px solid #444;
}

.filters .button.is-checked {
    color: white;
}

.filters .button:active {
}

/* ---- button-group ---- */

.filters .button-group:after {
    content: '';
    display: block;
    clear: both;
}

.filters .button-group .button {
    float: left;
    border-radius: 0;
    margin-left: 0;
    margin-right: -1px;
}

.filters .button-group .button:first-child {
    border-radius: 4px 0 0 4px;
}

.filters .button-group .button:last-child {
    border-radius: 0 4px 4px 0;
}