#boxes {
  width: 100%;
  height: 100%;
}

.box-4 {
  position: relative;
  float: right;
  width: 78.5%;
  max-height: 400px;
  overflow: hidden;
  margin-left: 1%;
}

.box-3 {
  width: 20.5%;
  height: 100%;
  min-height: 410px;
  position: relative;
  float: left;
}

.box-2 {
  position: relative;
  float: right;
  width: 20.5%;
  margin-top: 1%;
}

.box-1 {
  position: relative;
  float: right;
  width: 57%;
  margin: 1% 1% 0% 1%;
}