.nav i {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-right: 15px;
  vertical-align: middle;
}

.nav-icon {
  display: block;
  width: 20px;
  height: 20px;
}

@media (max-width: 1100px) {
  .nav i {
    margin-right: 0;
  }
}