/* main content */
#content {
  position: absolute;
  width: 100%;
  height: 40vh;
  margin-top: 25vh;
  overflow: hidden;
  white-space: nowrap;
  z-index: 0;
}

.item {
  position: relative;
  z-index: 5;
  display: inline-block;
  width: 25vh;
  height: 90%;
  border-radius: 10px;
  margin-left: 5%;
  vertical-align: middle;
}

.item_title_box {
  margin-top: 7vw;
  width: 100%;
  height: 50%;
  padding-top: 5%;
}

.item_title {
  padding-left: 15px;
  padding-right: 15px;
  white-space: normal;
  text-align: center;
}

canvas {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
}