Danilo Costa wrote:

Hello Danilo,

I have experienced the same issue. In my case it was due to the classes for general html elements of the Lisbon Theme tamper with the box-sizing attriibute.

If you include the Gantt chart inside of a div with the a class and then override the box-sizing value to initial the weekends stay aligned.

Attached is an example oml bwere I use the class MyGanttChart and apply the following css:

html .MyGanttChart,
body .MyGanttChart,
.MyGanttChart div,
.MyGanttChart span,
.MyGanttChart a,
.MyGanttChart img,
.MyGanttChart ul,
.MyGanttChart li,
.MyGanttChart form,
.MyGanttChart table,
.MyGanttChart tbody,
.MyGanttChart thead,
.MyGanttChart tr,
.MyGanttChart th,
.MyGanttChart td {
    box-sizing: initial;
}

Hope it helps,

Miguel Amado