* {box-sizing:border-box}

/* Hide the images by default */
.chart_slides {display: none}
div.chart_slides > img {vertical-align: middle; padding: 20px;}

/* Slideshow container */
.charts-container {
  max-width: 90%;
  position: relative;
  margin: auto;
}

.chart_dots {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active, .chart_dots:hover {
  background-color: blue;
}