css-grid

So I have this grid: +---------+------------------------------+---------+ | <div> | <p> - 1000 characters long | <div> | +---------+------------------------------+---------+ Inside p there's super long string with no spaces. div s are placeholders with fixed dimensions. This produces the above: display: grid; grid-auto-flow: column; grid-template-columns: auto minmax(0, 1fr) auto; But changing minmax(0, 1fr) to 1fr gives this: +---------+----------------------------------------+ | <div> | <p> - 1000 characters long | <div> | +---------+----------------------------------------+ It overflows out

Is it possible to make a grid item span from the first to the last row when I don't know the number of rows? Lets say I have the following html with an unknown number of boxes. How can I make the third .box span from the first grid-line to the last? .container { display: grid; grid-template-columns: repeat(3, minmax(10rem, 1fr)) [last-col] 35%; grid-template-rows: auto [last-line]; } .box { background-color: blue; padding: 20px; border: 1px solid red; } .box:nth-child(3) { background-color: yellow; grid-column: last-col / span 1; grid-row: 1 / last-line; } <div class="container"> <div class=