/* 共通動画カード：通常のグリッド表示と種別ごとの横スクロール表示で共有。 */
.sg-video-grid,
.sg-video-gallery {
  --sg-video-columns: 3;
  --sg-video-short-columns: 4;
  --sg-video-gap: 16px;
  min-width: 0;
  max-width: 100%;
}
.sg-video-grid {
  display: grid;
  grid-template-columns: repeat(var(--sg-video-columns), minmax(0, 1fr));
  gap: var(--sg-video-gap);
}
.sg-video-card {
  display: block;
  min-width: 0;
  margin: 0;
  color: inherit;
  font-weight: normal;
  text-decoration: none;
}
.sg-video-card:hover {
  text-decoration: none;
}
.sg-video-card:hover .sg-video-card-name {
  text-decoration: underline;
}
.sg-video-card-image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
  background: #eee;
}
.sg-video-card-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sg-video-card-image-wrap .play-icon {
  transform: translate(-50%, -50%) scale(0.5);
  transform-origin: center;
}
.sg-video-card-date {
  margin-top: 6px;
  color: #666;
  font-size: 0.85em;
  font-weight: normal;
}
.sg-video-card-name {
  margin-top: 2px;
  color: var(--main-text-color, var(--main-color, #555));
  font-weight: bold;
  line-height: 1.45;
  word-break: normal;
  overflow-wrap: anywhere;
}
.sg-video-card-noimage {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #999;
  font-size: 0.9em;
}

/* 種別ごとに一段。列数を超えた分だけ横スクロールする。 */
.sg-video-group {
  min-width: 0;
}
.sg-video-group + .sg-video-group {
  padding-top: 10px;
  border-top: 1px solid #d4d7dc;
}
.sg-video-gallery .sg-video-group-heading {
  margin: 0 0 12px;
  padding: 6px 10px;
  border: 0;
  border-left: 4px solid var(--main-color, #555);
  border-bottom: 1px solid var(--main-color, #555);
  border-radius: 0;
  background: rgb(255 255 255 / 85%);
  box-shadow: none;
  color: var(--main-text-color, var(--main-color, #555));
  font-size: 18px;
  font-weight: bold;
  line-height: 1.5;
}
.sg-video-gallery .sg-video-group-heading::before,
.sg-video-gallery .sg-video-group-heading::after {
  content: none;
}
.sg-video-rail {
  position: relative;
  min-width: 0;
}
.sg-video-rail-track {
  display: flex;
  gap: var(--sg-video-gap);
  align-items: flex-start;
  overflow-x: auto;
  padding: 2px 0 10px;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}
.sg-video-rail-track > .sg-video-card {
  flex: 0 0 calc((100% - (var(--sg-video-columns) - 1) * var(--sg-video-gap)) / var(--sg-video-columns));
  scroll-snap-align: start;
}
/* 種別サムネのショート動画：通常動画と混在しても各カードの幅を切り替える。 */
.sg-video-gallery .sg-video-card--short {
  --sg-video-columns: var(--sg-video-short-columns);
}
.sg-video-gallery .sg-video-card--short .sg-video-card-image-wrap {
  aspect-ratio: 9 / 16;
}
.sg-video-gallery .sg-video-card--short .sg-video-card-name {
  font-size: 14px;
}
.sg-video-rail-track:focus-visible {
  outline: 2px solid var(--main-color, #555);
  outline-offset: -2px;
}
.sg-video-rail .sg-video-scroll-button {
  position: absolute;
  top: var(--sg-video-arrow-top, 50%);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 1px solid var(--main-color, #999);
  border-radius: 50%;
  background: #fff;
  color: var(--main-text-color, var(--main-color, #555));
  box-shadow: 0 2px 8px rgb(0 0 0 / 18%);
  font-size: 23px;
  line-height: 1;
  transform: translateY(-50%);
  cursor: pointer;
}
.sg-video-rail .sg-video-scroll-button[hidden] {
  display: none;
}
.sg-video-scroll-prev {
  left: 4px;
}
.sg-video-scroll-next {
  right: 4px;
}
.sg-video-scroll-button:focus-visible {
  outline: 2px solid var(--main-color, #555);
  outline-offset: 2px;
}
@media (max-width: 768px) {
  .sg-video-grid,
  .sg-video-gallery {
    --sg-video-columns: 2;
    --sg-video-short-columns: 2;
    --sg-video-gap: 12px;
  }
  .sg-video-gallery .sg-video-group-heading {
    font-size: 16px;
  }
  .sg-video-card-name {
    font-size: 0.9em;
  }
  .sg-video-gallery .sg-video-card--short .sg-video-card-name {
    font-size: 12px;
  }
  .sg-video-card-image-wrap .play-icon {
    transform: translate(-50%, -50%) scale(0.4);
  }
  .sg-video-rail .sg-video-scroll-button {
    width: 34px;
    height: 34px;
    font-size: 20px;
  }
}