/* サイト内YouTube埋め込み：離脱を抑え、視聴後はチャットへ */
.i3-youtube-inline {
  margin: 1.25rem 0 1.75rem;
  border: 1px solid #c8e6d4;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(180deg, #f7fff9 0%, #fff 42%);
  box-shadow: 0 12px 28px rgba(31, 111, 67, 0.08);
}

.i3-youtube-inline__lead {
  padding: 1rem 1.15rem 0.85rem;
  border-bottom: 1px solid #e3f2e8;
}

.i3-youtube-inline__eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #1f6f43;
}

.i3-youtube-inline__player-wrap {
  position: relative;
  background: #0f1720;
}

.i3-youtube-inline__player-wrap::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.i3-youtube-inline__player {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.i3-youtube-inline__footer {
  padding: 1rem 1.15rem 1.15rem;
}

.i3-youtube-inline__next {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: #1e293b;
}

.i3-youtube-inline__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.i3-youtube-inline__postwatch {
  display: none;
  padding: 0.85rem 1.15rem 1rem;
  border-top: 2px solid #1f6f43;
  background: #edf9f0;
  color: #123f22;
  font-size: 0.94rem;
}

.i3-youtube-inline__postwatch.is-visible {
  display: block;
}

.i3-youtube-inline__postwatch strong {
  display: block;
  margin-bottom: 0.25rem;
}

.i3-youtube-inline__postwatch .btn {
  margin-top: 0.55rem;
}

.i3-youtube-inline.is-postwatch .i3-youtube-inline__chat-main {
  box-shadow: 0 0 0 3px rgba(31, 111, 67, 0.25);
}

.i3-youtube-inline__grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .i3-youtube-inline__grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.i3-youtube-inline__mini {
  margin: 0;
  border: 1px solid #dbe7f1;
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}

.i3-youtube-inline__mini .i3-youtube-inline__player-wrap::before {
  padding-top: 56.25%;
}

.i3-youtube-inline__mini-title {
  padding: 0.65rem 0.85rem 0;
  font-size: 0.92rem;
  font-weight: 700;
  margin: 0;
}

.i3-youtube-inline__mini .i3-youtube-inline__footer {
  padding: 0.65rem 0.85rem 0.85rem;
}

.i3-yt-facade--journal {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: 12px;
  overflow: hidden;
}

.i3-yt-facade--journal img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 12px;
  background: #e5f4ea;
}

.i3-journal__video-item.i3-yt-card--journal {
  cursor: default;
}

.i3-journal__video-item.i3-yt-card--journal .i3-youtube-inline__player-wrap {
  grid-column: 1;
  border-radius: 12px;
  overflow: hidden;
}

.i3-journal__video-item.i3-yt-card--journal.is-playing {
  grid-template-columns: 1fr;
}

.i3-journal__video-item.i3-yt-card--journal.is-playing .i3-journal__video-copy {
  grid-column: 1 / -1;
}

.i3-youtube-inline__postwatch--journal {
  grid-column: 1 / -1;
  margin-top: 0.35rem;
}

.i3-youtube-inline__mini .i3-youtube-inline__next {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.i3-yt-facade {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: #0f1720;
  cursor: pointer;
  position: relative;
}

.i3-yt-facade img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.i3-yt-facade__play {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: rgba(15, 23, 32, 0.82);
  color: #fff;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
  border: 2px solid rgba(255, 255, 255, 0.85);
}

.i3-youtube-gallery {
  margin: 1.5rem 0;
}

.i3-youtube-gallery__title {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 0.35rem;
}

.i3-youtube-gallery__lead {
  margin: 0 0 1rem;
  color: #334155;
  font-size: 0.95rem;
}

.i3-yt-hub__intro {
  margin-bottom: 1rem;
  font-size: 1.02rem;
}

.i3-yt-hub__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}

.i3-yt-hub__filter {
  border: 1px solid #b8dcc6;
  background: #fff;
  color: #14532d;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.86rem;
  cursor: pointer;
}

.i3-yt-hub__filter.is-active {
  background: #1f6f43;
  border-color: #1f6f43;
  color: #fff;
}

.i3-yt-hub__list {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .i3-yt-hub__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.i3-yt-hub__footer {
  margin-top: 1.5rem;
  text-align: center;
}