.main-section.documentation {
  border-top: 1px solid #DFDFDF;
  border-bottom: 1px solid #DFDFDF;
}
.docs-ref-list .doc-ref-list-item {
  width: 100%;
  display: inline-block;
  vertical-align: top;
}
.doc-ref {
  margin-top: 40px;
}
.doc-ref p {
  line-height: 1;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid #C4C7CA;
}
.doc-ref li {
  font-size: 16px;
  font-weight: 500;
  padding-left: 30px;
  padding-bottom: 16px;
  position: relative;
}
.doc-ref li::before {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 100%;
  background-color: #2A98CB;
  left: 10px;
  top: 6px;
}

.doc-ref .more-items {
  display: inline-block;
  padding: 4px 8px 5px;
  background: #fff;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1;
  font-weight: 500;
  margin-left: 10px;
}

.doc-ref .more-items:hover {
  text-decoration: underline;
}

/* ≥ 568px */
@media screen and (min-width: 35.5em) {
  .docs-ref-list .doc-ref-list-item {
    width: 50%;
  }
  .doc-ref {
    margin-top: 50px;
    padding-right: 40px; 
  }
  .doc-ref-list-item:nth-child(2n) .doc-ref {
    padding-right: 0;
  }
}

/* ≥ 768px */
@media screen and (min-width: 48em) {
  .docs-ref-list .doc-ref-list-item {
    width: 33%;
  }
  .doc-ref {
    padding-right: 40px;
  }
  .doc-ref-list-item:nth-child(2n) .doc-ref {
    padding-right: 40px;
  }
}