Sellify Helpdesk

Add following in custom JS        

window.addEventListener( "Sellify::UCD::CartBuilt", function( e ){
    var a = JSON.parse( localStorage.getItem( 'dcSettings' ) )
    a.appActive = true;
    a.config.classes.button = "sellify-ucd-discount-apply"
    a.config.classes.innerWrapper = "sellify-ucd-discount-inner-holder"
    a.config.classes.input = "sellify-ucd-discount-input"
    a.config.classes.outerWrapper = "sellify-ucd-discount-outer-holder"
    a.config.changeSubtotal = true
    a.config.customSubtotal = ".ucdcart__footer DIV.grid__item.one-third.text-right > P"
    localStorage.setItem( 'dcSettings', JSON.stringify( a ) )
} )

Add followings in custom css:

#sellify-ucd-cart-drawer .sellify-ucd-discount-inner-holder {
  padding:20px;
  display:grid;
  grid-template-columns:1fr 120px;
}

#sellify-ucd-cart-drawer .sellify-ucd-discount-inner-holder button {
  padding:15px;
  border-radius:0;
}

#sellify-ucd-cart-drawer .sellify-ucd-discount-inner-holder input {
  border-radius:0;
  padding:10px;
  min-width:0;
}

#sellify-ucd-cart-drawer .dcDiscountBox {
  display:block;
  margin:0 20px 20px;
  padding:20px;
}

#sellify-ucd-cart-drawer #removeDiscount {
  background:none;
  float:right;
  padding:3px 0;
}

#sellify-ucd-cart-drawer #dcodeNewSubtotal br {
  display:none;
}

#sellify-ucd-cart-drawer .dcodeLineThrough {
  opacity:0.5;
}

#sellify-ucd-cart-drawer .dcodeTable {
  display:table;
  max-width:100%;
  width:100%;
  background:#f7f8f9;
}

#sellify-ucd-cart-drawer .dcodeTable td {
  padding:20px 20px 0 20px;
}

#sellify-ucd-cart-drawer .dcodeTable td.dcRestriction {
  padding:0 20px 20px 20px;
        display: none;
}

#sellify-ucd-cart-drawer #dcodeInfo {
  margin-top:0;
}


#sellify-ucd-cart-drawer .dcodeLineThrough {
  opacity:1!important;
  text-decoration:none!important;
}

#sellify-ucd-cart-drawer .dcodeLineThrough span {
  opacity:0.5;
  text-decoration:line-through;
}

#sellify-ucd-cart-drawer .dcodeTable td {
  display:inline-block;
  padding:20px 20px 0;
  font-size:17px;
  text-transform:uppercase;
}

#sellify-ucd-cart-drawer .dcodeTable {
  background:none!important;
}

@media only screen and (max-width:600px) {
  #sellify-ucd-cart-drawer .sellify-ucd-discount-inner-holder {
    grid-template-columns:1fr 70px;
  }
  #sellify-ucd-cart-drawer .dcodeTable td:first-of-type {
    padding-right:10px;
  }
  #sellify-ucd-cart-drawer .dcodeTable td + td {
    padding-left:10px;
  }
}