div {
  margin: 10px;
  padding: 10px;       
}
h1 {
  font-size: 1.2em;
}
#outer-container {
  background-color:#CCCCFF;
  width: 90%;
  height: 800px;
  border: 2px solid #000099;
}

.outer-item {
  background-color:#FFFFFF;
  width: 50%;
  height: 310px;
  border: 2px solid #000000;
}

.inner-item {
  background-color:#CCFFCC;     
  width: 50%;
  height: 85px;
  border: 2px solid #009900;   
}