i.pi{display:inline-block}.pi{width:24px;height:24px;background:no-repeat center center;background-size:100% auto}.pi-xxs{width:8px;height:8px}.pi-xs{width:12px;height:12px}.pi-sm{width:16px;height:16px}.pi-md{width:32px;height:32px}.pi-lg{width:64px;height:64px}.pi-xl{width:128px;height:128px}.pi-xxl{width:256px;height:256px}