Hello,
please use this code in custom css:
@media (max-width: 768px){
.home .widget.buddypress.widget span.select2.select2-container {
width: 100% !important;
}
.v_module.vibe_sidebar .widget.buddypress.widget .widget.buddypress.inside form#searchform li input#s {
text-align: center !important;
padding-left: 0 !important;
}
}
refer:
http://prntscr.com/ps34z5