.center{margin:auto;padding:10px;text-align:center}.fs-xxl{font-size:xx-large}.fs-xl{font-size:x-large}.fs-l{font-size:large}.pt{padding-top:16px}.mt{margin-top:16px}.pb{padding-bottom:16px}.mb{margin-bottom:16px}div.callout-box{padding:20px;margin-top:20px;border-radius:12px}div.info{background-color:#8a2be2;color:#fff}div.warning{background-color:#ff4500;color:#fff}div.tip{background-color:green;color:#fff}