.content {
  position: absolute;
  top: 0;
  left: 250px;
  right: 0;
  bottom: 0;
  color: var(--c-black);
  overflow-x: hidden;
  overflow-y: auto;
}

@media only screen and (min-width: 150px) and (max-width: 900px) {
  .content {
    left: 0;
  }
}