<div class="container"> <div class="sidebar">sidebar</div> <div class="content">content</div> <div class="sidebar">sidebar</div> </div>
.container { display: flex; height: 100vh; } .sidebar, .content { display: flex; justify-content: center; align-items: center; color: white; padding: 0 10px; } .sidebar { background: gray; } .content { flex-grow: 1; background: lightblue; }