.grid {
  display: grid;
  grid-template-columns: 1fr 3fr; /* switched from percentages for spacing efficiency */
  grid-gap: 10px;
  /* grid-auto-rows: 500px; */
  
}

.right {
  display: grid;
  /* grid-template-rows: repeat(4, 1fr); */
  grid-gap: 5px;
  grid-auto-rows: 120px; /* new */
  overflow: auto; /* new */
}