/* Columns and rows */
grid-template-columns: 1rem 2rem 1rem; /* Measurement units */
grid-template-columns: 25% 50% 25%; /* Percentage units */
grid-template-columns: 1rem auto 1rem 2fr; /* Fill remaining widths with auto or fr units */
grid-template-columns: repeat(12, 1fr); /* Repeat columns without needing to write them */
grid-template-rows: 1rem 10% auto repeat(5, 10px); /* Mix any group, same rules work for rows */