.line-entry {
  padding: 8px 0 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid #ccd8cf;
  scroll-margin-top: 24px;
}
.line-entry > h3,
.line-entry > h4 {
  font-size: 22px;
  line-height: 1.3;
}
.line-index summary {
  cursor: pointer;
  font-weight: 700;
}
.line-index li {
  margin: 8px 0;
}
.line-chapter-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 16px;
  margin: 24px 0;
}
.line-chapter-card,
.line-extra {
  padding: 20px;
  border: 1px solid #d1dcd2;
  border-radius: 12px;
  background: #f3f6f1;
}
.line-chapter-card h2 {
  font-size: 22px;
  margin-top: 0;
}
.line-chapter-card p {
  margin: 0 0 16px;
}
.line-chapter-card a,
.line-extra a {
  font-weight: 700;
}
.line-extra {
  margin: 24px 0;
}
.legacy-anchor {
  display: block;
  height: 0;
  scroll-margin-top: 24px;
}
.line-diagram {
  margin: 20px 0;
  padding: 16px;
  background: #eef2ec;
  border: 1px solid #d1dcd2;
  border-radius: 12px;
}
.line-diagram svg {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: auto;
}
.line-diagram figcaption {
  font-size: 16px;
  line-height: 1.6;
}
.line-diagram figcaption span {
  display: block;
  margin-top: 8px;
}
.subgroup-title {
  font-size: 25px;
  padding-top: 24px;
  border-top: 2px solid #ccd8cf;
}
@media (max-width: 600px) {
  .line-diagram {
    padding: 10px;
  }
}
.anchor-types {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 22px 0;
}
.anchor-type {
  padding: 18px;
  background: #eef2ec;
  border: 1px solid #d1dcd2;
  border-radius: 12px;
}
.anchor-type svg {
  display: block;
  width: 100%;
  height: 160px;
}
.anchor-type h4 {
  font-size: 19px;
  margin: 14px 0 10px;
}
.anchor-type p {
  margin: 0;
}
.anchor-calculation {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 2px solid #ccd8cf;
  scroll-margin-top: 24px;
}
.anchor-calculation h4,
.anchor-calculation h5 {
  font-size: 22px;
}
.anchor-formula {
  padding: 20px;
  background: #123f45;
  color: white;
  border-radius: 10px;
  font-size: 21px;
  line-height: 1.5;
}
.anchor-formula span {
  display: block;
  font-size: 16px;
  margin-top: 12px;
}
.anchor-steps li {
  margin: 18px 0;
}
.anchor-reference {
  font-size: 15px;
}
@media (max-width: 600px) {
  .anchor-types {
    grid-template-columns: 1fr;
  }
  .anchor-formula {
    font-size: 19px;
  }
}