.flex {
  display: flex;
  flex-wrap: wrap;
  margin: 0px auto;
  justify-content: center;
}

.border-contents {
  border: 2px solid black;
  background-color: white;
  padding: 10px;
}

.question-text {
  color: #009b87;
}

.image-item {
  display: block;
  max-width: 22rem;
  margin-left: auto;
  margin-right: auto;
  align-items: center;
}

.image-item.lis {
  max-width: 20rem;
  margin: 0.5rem;
}

.image-item.col-1 {
  max-width: none;
}

.image-item .item-image {
  position: relative;
  width: 100%;
  height: auto;
}

.image-item .item-title {
  position: relative;
  float: left;
  top: 0px;
  left: 50%;
  text-align: center;
}

.image-item .item-paren {
  padding-left: 8rem;
}

.indent-block {
  margin-left: 1.5rem;
  display: block;
}

.indent-block.indent_char1 {
  text-indent: -1.5rem;
  padding-left: 1.5rem;
}

.image-caption {
  text-align: center;
}

.qa-position {
  text-align: center;
}

.qa-block {
  display: inline-block;
}

.page-drill.lis {
  max-width: calc(65rem + 32px);
  background-color: #dff1f0;
  margin-top: 20px;
  padding: 20px
}

.mark-circle.lis {
  display: inline-block;
  position: relative;
  width: 1.1em;
  height: 1.1em;
  font-size: 0.9em;
  line-height: 1em;
  text-align: center;
  color: #fff;
  background-color: #000;
  border-radius: 50%;
  vertical-align: middle;
  top: -0.12em;
  font-family: Helvetica, "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN",
    sans-serif;
}