body {
  background-color: var(--color-beige);
}

.column-detail-layout {
  max-width: 1120px;
  margin: 0 auto 4rem;
  padding: 3rem;
  background: #fff;
  width: 95%;
}

.article-layout {
  display: flex;
  gap: calc(var(--s-val) * 4);
  align-items: flex-start;
  margin: 0;
  padding: 0;
}

.article-text-group {
  width: 60%;
}

.article-image-group {
  width: 40%;
}

.article-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.article-category {
  font-weight: 600;
  color: #fff;
  font-size: calc(var(--s-val) * 1.6);
  background-color: var(--color-orange_2);
  display: inline-block;
  padding: 0.4rem 1.2rem;
  line-height: 1;
}

.article-title {
  margin: 0 0 1.25rem;
  font-size: calc(var(--s-val) * 3.2);
  line-height: 1.3;
  background: var(--bg-gra);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.article-reading-time,
.article-date {
  margin: 0 0 1rem;
  font-size: calc(var(--s-val) * 1.6);
  font-weight: bold;
}

.article-featured img {
  width: 100%;
  height: auto;
  display: block;
}

.article-placeholder {
  width: 100%;
  padding: 56% 0;
  background: #f6f6f6;
  border-radius: 12px;
  color: #999;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.column-body-layout {
  display: flex;
  gap: calc(var(--s-val) * 4);
  align-items: flex-start;
  max-width: 1120px;
  margin: 0 auto 5rem;
  width: 95%;
}

.column-body-content {
  flex: 1 1 70%;
  background-color: #fff;
  padding: 3rem 3rem;
  border-radius: calc(var(--s-val) * 1);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.column-body-layout .main__side {
  flex: 0 0 30%;
  width: auto;
}

.column-body-content ul,
.column-body-content ol {
  padding: 2rem 3rem;
}

.main__side {
  display: flex;
  flex-direction: column;
  gap: calc(var(--s-val) * 3);
}

.side-block {
  background: #fff;
  border-radius: calc(var(--s-val) * 1.2);
  padding: calc(var(--s-val) * 2);
  border: 1px solid var(--color-orange_2);
}

.side-block--banner {
  background-color: unset;
  padding: 0;
  box-shadow: 3px 3px 5px rgba(0, 0, 0, 0.1);
}

.side-block__title {
  margin: 0 0 calc(var(--s-val) * 1.5);
  font-size: calc(var(--s-val) * 2.1);
  font-weight: 700;
  background: var(--bg-gra);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.column-body-content h2 {
  font-size: calc(var(--s-val) * 2.4);
  font-weight: 500;
  background-color: var(--color-orange_2);
  padding: 1rem 1rem 1rem 2rem;
  color: #fff;
  margin-bottom: 2rem;
}

#toc-1,
#toc-2,
#toc-3 {
  font-weight: 500;
}

#toc-1 {
  font-size: calc(var(--s-val) * 2.4);
  background-color: var(--color-orange_2);
  padding: 1rem 1rem 1rem 2rem;
  color: #fff;
  margin-bottom: 2rem;
}

.column-body-content h3 {
  font-size: calc(var(--s-val) * 2);
  background-color: #ffecd9;
  border-left: 3px solid var(--color-orange_2);
  padding: 1rem 0 1rem 2rem;
  margin-bottom: 2rem;
}

.column-body-content h4 {
  font-size: calc(var(--s-val) * 1.6);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2rem;
}

.column-body-content h4::before {
  content: "";
  display: block;
  width: 10px;
  height: 2px;
  background-color: var(--color-orange_2);
}

.column-body-content p {
  font-size: calc(var(--s-val) * 1.6);
  margin-bottom: 2rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.column-body-content a {
  color: var(--color-orange_2);
  position: relative;
}

.column-body-content ul,
.column-body-content ol {
  display: flex;
  flex-direction: column;
  margin-bottom: 2rem;
  background-color: #ffecd9;
  padding: 2rem 3rem;
}

.column-body-content ol {
  padding: 2rem 3rem 2rem 3.5rem;
}

.column-body-content ol li {
  padding-left: 1rem;
}

.column-body-content ul {
  gap: calc(var(--s-val) * 1);
}

.column-body-content ol {
  gap: calc(var(--s-val) * 1);
}

.column-body-content li {
  list-style: unset;
  position: relative;
  font-size: calc(var(--s-val) * 1.6);
  padding-left: 1rem;
}

.column-body-content ul li {
  text-indent: -2.5rem;
}

.column-body-content ul li::before {
  content: "⚫︎";
}

.column-body-content ul li::before,
.column-body-content ol li::marker {
  color: var(--color-orange_2);
  font-size: calc(var(--s-val) * 1.6);
  font-weight: bold;
  margin-right: 1rem;
}

.column-body-content blockquote {
  position: relative;
  padding-left: 1rem;
  padding: 0;
  margin: 0 0 0 2rem;
}

.column-body-content blockquote::before {
  content: "";
  height: 100%;
  width: calc(var(--s-val) * 0.5);
  background: #e61717;
  background: linear-gradient(180deg, rgba(230, 23, 23, 1) 0%, rgba(255, 128, 0, 1) 100%);
  position: absolute;
  left: -2rem;
}

.toc {
  position: relative;
  padding-right: 1.5rem;
}

.toc::after {
  content: "";
  position: absolute;
  top: var(--toc-thumb-top, 0px);
  right: 4px;
  width: 10px;
  height: var(--toc-thumb-size, 40px);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(230, 23, 23, 1) 0%, rgba(255, 128, 0, 1) 100%);
  pointer-events: none;
  z-index: 2;
  opacity: var(--toc-thumb-opacity, 0);
}

.toc::before {
  content: "";
  position: absolute;
  top: 0;
  right: 4px;
  width: 10px;
  height: var(--toc-track-height, 0px);
  border-radius: 999px;
  background: #ffe6cf;
  pointer-events: none;
  z-index: 1;
  opacity: var(--toc-track-opacity, 0);
}

.toc__list {
  margin: 0;
  padding-left: 2.5rem;
  max-height: 30rem;
  overflow: auto;
  scrollbar-width: none;
  scrollbar-gutter: stable;
}

li.toc__item {
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.toc__item a {
  color: #000;
  text-decoration: none;
  font-size: calc(var(--s-val) * 1.6);
  position: relative;
}

.toc__item a::before {
  content: "";
  background-image: url(../img/more-arrow_bottom.png);
  background-repeat: no-repeat;
  background-size: contain;
  width: 15px;
  height: 15px;
  top: 50%;
  transform: translateY(-50%);
  position: absolute;
  left: -2.5rem;
}

.side-banner img {
  width: 100%;
  height: auto;
  display: block;
}

.popular-post {
  list-style: none;
  margin: 0;
  padding: 0;
}

.popular-post__link {
  display: flex;
  gap: calc(var(--s-val) * 1.5);
  align-items: flex-start;
  color: inherit;
}

.popular-post__thumbnail {
  width: 40%;
  display: flex;
  flex-direction: column;
}

.popular-post__thumbnail img {
  display: block;
  object-fit: cover;
  aspect-ratio: 120 / 83;
}

.popular-post__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.8rem;
  flex-direction: column;
}

.popular-post__category {
  margin: 0;
  color: #666;
  font-size: calc(var(--s-val) * 1.4);
  background-color: var(--color-orange_2);
  color: #fff;
  text-align: center;
  padding: 0.1rem 0.6rem;
}

.popular-post__text {
  flex: 1 1 auto;
  width: 60%;
}

.popular-post__title {
  font-weight: 600;
  font-size: calc(var(--s-val) * 1.6);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


.popular-post__item + .popular-post__item {
  margin-top: calc(var(--s-val) * 1.5);
}

.side-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.side-menu li + li {
  border-top: 1px solid #eee;
}

.side-menu a {
  display: block;
  padding: calc(var(--s-val) * 1.6) calc(var(--s-val) * 2);
  color: #333;
  text-decoration: none;
}

.side-menu a:hover {
  color: var(--color-orange_2);
}

.column-relative {
  position: relative;
  display: flex;
  gap: calc(var(--s-val) * 2);
  align-items: center;
  border-radius: calc(var(--s-val) * 1.5);
  background: #fff;
  text-decoration: none;
  color: inherit;
  box-shadow: 2px 2px 6px 0 rgba(0, 0, 0, 0.25);
  padding: 0 5rem 0 0;
  max-width: 100%;
}

.column-relative::before {
  content: "";
  position: absolute;
  background-image: url(../img/column-arrow.png);
  background-size: contain;
  background-repeat: no-repeat;
  width: 20px;
  height: 20px;
  right: 2%;
  top: 50%;
  transform: translateY(-50%);
}

.column-relative__media {
  position: relative;
  flex: 0 0 30%;
  display: block;
}

.column-relative img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--s-val) * 1.5) 0 0 calc(var(--s-val) * 1.5);
  object-fit: cover;
}

.column-relative__category {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--color-orange_2);
  color: #fff;
  font-size: calc(var(--s-val) * 1.2);
  padding: 0.5rem 0;
  border-radius: calc(var(--s-val) * 1.5) 0 0 0;
  width: 70%;
  text-align: center;
}

.column-relative__title {
  margin: 0 0 0.4rem;
  font-weight: 700;
  display: -webkit-box;
  font-size: calc(var(--s-val) * 1.4);
  overflow: hidden;
  max-width: 100%;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.column-relative__excerpt {
  margin: 0;
  color: #555;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.column-relative__body {
  display: block;
  flex: 1 1 0;
  min-width: 0;
  overflow: hidden;
}

.related-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: calc(var(--s-val) * 3);
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 0 5rem;
  width: 95%;
}

.related-column__link {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #eee;
  border-radius: calc(var(--s-val) * 1);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 2px 2px 6px 0 rgba(0, 0, 0, 0.25);
  padding: 2rem;
}

.related-column__thumb img {
  width: 100%;
  height: auto;
  display: block;
}

.related-column__placeholder {
  width: 100%;
  padding: 40% 0;
  background: #f6f6f6;
  color: #999;
  text-align: center;
  font-weight: 600;
}

.related-column__body {
  padding: 1.2rem;
}

.related-column__cats {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--s-val) * 0.5);
  margin-bottom: 0.6rem;
}

.related-column__cat {
  margin: 0;
  font-size: calc(var(--s-val) * 1.4);
  color: #fff;
  font-weight: 700;
  background-color: var(--color-orange_2);
  display: inline-block;
  padding: 0.2rem 0;
  width: calc(33.33% - calc(var(--s-val) * 0.4));
  text-align: center;
}

.related-column__title {
  margin: 0 0 0.6rem;
  font-size: calc(var(--s-val) * 1.6);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
}

.related-column__excerpt {
  font-size: calc(var(--s-val) * 1.6);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.columns-section {
  background: #fff;
}

.section-header h2 {
  text-align: center;
  font-size: calc(var(--s-val) * 3.2);
  background: var(--bg-gra);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  display: inline;
}

.section-header {
  text-align: center;
  padding: 5rem 0 5rem;
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  font-size: calc(var(--s-val) * 3.2);
}

.columns-section .section-header::before {
  width: 100%;
  content: "COLUMNS";
}

.section-header::before {
  font-size: calc(var(--s-val) * 12);
  width: 100%;
  color: var(--color-title);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-oswald);
  font-weight: bold;
}

@media (max-width: 768px) {
  .section-header::before {
    font-size: calc(var(--s-val) * 8);
  }
}

@media (max-width: 768px) {
  .article-title {
    font-size: calc(var(--s-val) * 2.5);
  }

  .article-category {
    text-align: center;
  }

  .column-relative__body {
    width: 90%;
    overflow: unset;
  }

  #toc-2 {
    font-size: calc(var(--s-val) * 2);
    padding: 1rem 1rem 1rem 1rem;
    margin-bottom: 2rem;
  }

  #toc-3 {
    font-size: calc(var(--s-val) * 1.8);
    gap: 10px;
    margin-bottom: 2rem;
  }

  #toc-3::before {
    width: calc(var(--s-val) * 4);
    height: calc(var(--s-val) * 0.4);
  }

  .column-relative {
    flex-direction: column;
    padding: 0 0 2rem 0;
    box-shadow: 3px 3px 5px rgba(0, 0, 0, 0.1);
    border-radius: calc(var(--s-val) * 1.5);
  }

  .column-relative__media {
    width: 100%;
    border-radius: calc(var(--s-val) * 2) calc(var(--s-val) * 2) 0 0;
    font-size: calc(var(--s-val) * 1.4);
  }

  .column-relative__category {
    padding: 0.8rem 0;
    font-size: calc(var(--s-val) * 1.4);
  }

  .column-relative__title {
    font-size: calc(var(--s-val) * 1.6);
  }

  .column-relative img {
    width: 100%;
    object-fit: cover;
    border-radius: calc(var(--s-val) * 2) calc(var(--s-val) * 2) 0 0;
  }

  .column-detail-wrapper {
    padding: 0 1.5rem;
  }

  .column-detail-layout {
    padding: 2rem 1.5rem 3rem;
    border-radius: calc(var(--s-val) * 1);
  }

  .article-layout {
    flex-direction: column;
    gap: calc(var(--s-val) * 1);
  }

  .column-body-content {
    padding: 3rem 2rem;
  }

  #toc-1 {
    font-size: calc(var(--s-val) * 2.4);
    padding: 1rem;
    margin-bottom: 2rem;
  }

  .article-text-group,
  .article-image-group {
    width: 100%;
  }

  .column-body-layout {
    flex-direction: column;
    padding: 0 1.5rem 3rem;
    gap: calc(var(--s-val) * 3);
    width: 100%;
  }

  .column-body-layout .main__side {
    display: contents;
  }

  .side-block--toc {
    order: -1;
  }

  .related-columns {
    grid-template-columns: 1fr;
    margin-bottom: 3rem;
    padding: 0 1.5rem 5rem;
    width: 100%;
  }

  .section-header::before {
    font-size: calc(var(--s-val) * 8);
  }
}