Coś na takiej zasadzie?
<header> <div class="cointarner"></div> </header> <section class="content"> <div class="content-cointainer"></div> </section> <aside class="content"> <div class="sidebar-cointainer"></div> </aside>
.cointainer { width: 1000px; } .content-cointainer { width: 800px; float: right; } .sidebar-cointainer { width: 200px; }