  float: left;
}

.column {
  width: calc((100% - 20px * 12) / 12);
  height: 80px;
  margin-right: 10px;
  margin-left: 10px;
  background: rgba(0, 0, 255, 0.25);
  float: left;
}

/* Tooltip container - from https://www.w3schools.com/css/css_tooltip.asp */
.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
    visibility: hidden;
    /*width: 120px;*/
    background-color: #ccc;
    color: black;
    text-align: left;
    border-ra