nt-size: 0.7em;
        
          color: #888888;
        
          font-family: 'Open Sans';
        
      }

      #y-axis {
        position: absolute;
        z-index: 9999;
        pointer-events: none;
        text-height: 1;
        transition: opacity 0.5s ease-in;
        
          padding-bottom: 20px;
        
          font-size: 0.7em;
        
          color: #888888;
        
          font-family: 'Open Sans';
        
          transform: rotate(-90deg);
        
      }

      #tip {
