.btn.btn-sm.btn-default.stock-btn{
float: right;
width:300px;
padding: 8px;
}

@media screen and (max-width: 1199px){
.btn.btn-sm.btn-default.stock-btn{
margin-top:10px;
}
}

@media screen and (max-width: 767px){
.btn.btn-sm.btn-default.stock-btn{
float: none;
display:block;
width:auto;
}
}