.d3-tip{background:rgba(0,0,0,.8);color:#fff;font-size:12px;padding:6px}.d3-tip,.d3-tip:after{line-height:1;pointer-events:none}.d3-tip:after{box-sizing:border-box;color:rgba(0,0,0,.8);display:inline;font-size:10px;position:absolute;width:100%}.d3-tip.n:after{content:"\25BC";left:0;margin:-1px 0 0;text-align:center;top:100%}.d3-tip.e:after{content:"\25C0";left:-8px;margin:-4px 0 0;top:50%}.d3-tip.s:after{content:"\25B2";left:0;margin:0 0 1px;text-align:center;top:-8px}.d3-tip.w:after{content:"\25B6";left:100%;margin:-4px 0 0 -1px;top:50%}