.main {
    display: grid;
    width: 100%;
    overflow: hidden;
    height: 100vh;
    grid-template-rows: 75px 2fr;
    grid-template-columns: 210px 1fr;
    grid-template-areas:
      "aside head head head"
      "aside main main right"
      "aside main main right";
    text-align: center;
    grid-gap: 0.25rem;
  }
  
  @media (max-width: 960px) {
    .main {
      grid-template-columns: auto auto;
    }
  }