.cstui-type-buttons,
.cstui-size-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 8px 0 18px;
}
.cstui-btn {
    border: 1px solid #111;
    background: #fff;
    padding: 10px 18px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.2;
    min-width: 110px;
    text-align: center;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.cstui-btn:hover {
    border-color: #000;
}
.cstui-btn.is-active {
    background: #000;
    color: #fff;
}