ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

li {
  display: inline;
}

.content {
  padding-left: 15px;
  padding-right: 15px;
}

.right {
  float: right;
  width: 300px;
}

.left {
  float: left;
  width: calc(100% - 300px);
}