Hi, thanks for the reply. I found this in the stylesheet, which is used for the services boxes etc:
/* Column */
.column { margin-left: -3.06%; }
.column a { margin-bottom: 10px; display: block; }
.one-half, .one-third, .one-fourth { float: left; margin: 0 0 0 2.97%; padding-bottom: 30px; }
.one-half { width: 47.03%; }
.one-third { width: 30.36%; }
.one-fourth { width: 22.02%; }
So, there are some possibilities. I’ll try to make some shortcodes to be put in the functions.php and make a small tutorial. I’m no developer so no guarantees, as an alternative I can use the Shortcoder plugin to make some shortcodes.
EDIT: Tables are something quite different, and barely usable in responsive layouts. By the way, there is a workaround to make tables responsive: http://stackoverflow.com/questions/16628471/responsive-table-cell-to-new-line