td{text-align:center;padding:20px 10px}.tooltip{display:inline-block;position:relative}.tooltip .tooltiptext{visibility:hidden;color:#fff;text-align:center;z-index:1;opacity:0;background-color:#555;border-radius:6px;width:120px;margin-left:-60px;padding:5px 0;transition:opacity .3s;position:absolute;bottom:125%;left:50%}.tooltip .tooltiptext:after{content:"";border:5px solid #0000;border-top-color:#555;margin-left:-5px;position:absolute;top:100%;left:50%}.tooltip:hover .tooltiptext{visibility:visible;opacity:1}