Stack Off Rounded icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M21 18.188L11.812 9h7.573q.67 0 1.143.472q.472.472.472 1.143v7.573ZM6.812 4l-1-1h7.573q.67 0 1.143.472q.472.472.472 1.143v2h-1v-2q0-.25-.183-.432Q13.635 4 13.385 4H6.812Zm3.803 17q-.696 0-1.155-.46Q9 20.08 9 19.385v-8.958l-5-5V14h2.615v1h-2q-.696 0-1.155-.46Q3 14.08 3 13.385V4.427l-.36-.36q-.146-.146-.152-.347q-.007-.2.158-.366q.166-.166.357-.166t.357.166l17.286 17.292q.146.146.156.344q.01.198-.156.364q-.165.165-.357.165t-.356-.165l-.36-.354h-8.958Z"/></svg>