Move sidebar to left

@mat84 – you should not modify anything in your theme files – as those changes will be overwritten and lost when the theme is updated. Instead use a Child Theme or custom CSS plugin such as Custom CSS Manager

Once you have custom CSS set up – try adding this to it:

.main {
    float: right;
    padding: 0 20px 0 40px;
}

.sidebar {
    float: left;
    padding: 0 0 0 20px;
}