/* ヘッダー直下の新着／おすすめ／ランダム記事一覧 */
.home-article-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: 100%;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.home-article-columns__column {
  min-width: 0;
  background: #ffffff;
}

.home-article-columns__column + .home-article-columns__column {
  border-left: 2px solid #cbd5e1;
}

.home-article-columns__heading {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 43px;
  margin: 0;
  padding: 9px 12px;
  color: #1e293b;
  background: #f8fafc;
  border-bottom: 1px solid #cbd5e1;
  font-size: 14px;
  font-weight: 900;
}

.home-article-columns__heading--random {
  color: #c02626;
  background: #fff7f7;
}

.home-article-columns__new-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 7px;
  color: #ffffff;
  background: #dc2626;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.home-article-columns__scroll {
  height: 255px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  -webkit-overflow-scrolling: touch;
}

.home-article-columns__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.home-article-columns__row + .home-article-columns__row {
  border-top: 1px solid #e5e7eb;
}

.home-article-columns__link {
  display: block;
  min-width: 0;
  padding: 8px 12px;
  color: #0056d6;
  font-size: 15px;
  line-height: 1.6;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.15s, color 0.15s;
}

.home-article-columns__link:hover {
  color: #4338ca;
  background: #eff6ff;
  text-decoration: underline;
}

.home-article-columns__link--random {
  color: #dc2626;
}

.home-article-columns__link--random:hover {
  color: #991b1b;
  background: #fef2f2;
}

.home-article-columns__empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  margin: 0;
  padding: 20px 12px;
  color: #9ca3af;
  font-size: 12px;
  text-align: center;
}

@media (max-width: 1023px) {
  .home-article-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-article-columns__column--random {
    grid-column: 1 / -1;
    box-shadow: inset 0 2px #cbd5e1;
  }

  .home-article-columns__column--random.home-article-columns__column {
    border-left: 0;
  }
}

@media (max-width: 639px) {
  .home-article-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .home-article-columns__column + .home-article-columns__column {
    border-left: 0;
    box-shadow: inset 0 2px #cbd5e1;
  }

  .home-article-columns__column--random {
    grid-column: auto;
  }

  .home-article-columns__scroll {
    height: 230px;
  }
}