#rtGrid35 .rt-year {
  width: 14px; height: 14px; border-radius: 3px;
  border: 1px solid var(--gray-200, #e4e4e4);
}

#rtGrid35 .rt-year-past {
  background: var(--color-mint, #d1f2eb);
  border-color: var(--color-mint, #d1f2eb);
}

#rtGrid35 .rt-year-future {
  background: rgba(209, 242, 235, .6);
  border-style: dashed;
}

#rtGrid35 .rt-year-empty {
  background: transparent;
}