body {
 overflow: hidden;
}

.container {
  height: 100vh;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 30px 1fr;
}

.header {
  border-bottom: 1px solid lightgrey;
 }

.sidebar {
  border-right: 1px solid lightgrey;
}

.body {
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  
  		
}

.content {
  overflow-y: scroll;
  padding: 20px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 1.5em !important;
}

p {
  max-width: 960px;
}