.ui-btn-primary {
    background: linear-gradient(to bottom, #EF3340 0%, #da1d1d 100%);

    --ui-btn-background: #EF3340;
    --ui-btn-background-hover: #b11116;
    --ui-btn-background-active: #b11116;
    --ui-btn-border-color: rgba(0,0,0,0);
    --ui-btn-border-color-hover: rgba(0,0,0,0);
    --ui-btn-border-color-active: rgba(0,0,0,0);
    --ui-btn-color: #fff;
    --ui-btn-color-hover: #fff;
    --ui-btn-color-active: #fff;
}
.ui-btn-primary:hover
{
    background: linear-gradient(to top, #EF3340 0%, #da1d1d 100%);
}