.youtube-learning-archive-page .page-body,
.youtube-learning-detail .page-body {
  margin-top: 18px;
}

.youtube-learning-archive-page .page-header,
.youtube-learning-detail .page-header {
  background:
    radial-gradient(circle at 16% 18%, rgba(255, 255, 255, 0.16), transparent 24%),
    radial-gradient(circle at 84% 20%, rgba(255, 255, 255, 0.12), transparent 26%),
    linear-gradient(135deg, #7f1d1d 0%, #dc2626 52%, #f97316 100%);
  border-radius: 26px;
  box-shadow: var(--shadow-xl), 0 0 60px rgba(220, 38, 38, 0.24);
  margin-bottom: 36px;
  padding: 28px 58px;
}

.youtube-learning-archive-page .page-title,
.youtube-learning-detail .page-title {
  display: block;
  max-width: 1180px;
  margin: 0 auto;
  font-size: 2.65rem;
  line-height: 1.18;
  overflow: hidden;
  overflow-wrap: normal;
  text-overflow: clip;
  white-space: nowrap;
  word-break: normal;
}

.youtube-learning-hero__label {
  margin: 0 0 8px;
  color: #fee2e2;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.youtube-learning-detail__header .post-subtitle {
  margin-top: 12px;
}

.youtube-learning-policy {
  margin: 0 0 18px;
  border: 1px solid rgba(220, 38, 38, 0.16);
  border-radius: 14px;
  background: linear-gradient(135deg, #fff7ed 0%, #fff 70%);
  padding: 14px 18px;
}

.youtube-learning-archive-page.page-content:not(.legal-page) .page-body .youtube-learning-policy__title {
  margin: 0;
  border-left: 0;
  color: #991b1b;
  font-size: 0.96rem;
  line-height: 1.35;
  padding-left: 0;
}

.youtube-learning-archive-page.page-content:not(.legal-page) .page-body .youtube-learning-policy h2 {
  margin: 0;
  border-left: 0;
  padding-left: 0;
}

.youtube-learning-archive-page.page-content:not(.legal-page) .page-body .youtube-learning-policy p {
  margin: 6px 0 0;
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.65;
}

.youtube-learning-search-panel {
  margin: 0 0 28px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

.youtube-learning-search-panel__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  color: #0f172a;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.youtube-learning-search-panel__summary::-webkit-details-marker {
  display: none;
}

.youtube-learning-search-panel__summary::after {
  content: "";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background:
    linear-gradient(#991b1b, #991b1b) center / 12px 3px no-repeat,
    linear-gradient(#991b1b, #991b1b) center / 3px 12px no-repeat,
    #fee2e2;
}

.youtube-learning-search-panel[open] .youtube-learning-search-panel__summary::after {
  background:
    linear-gradient(#991b1b, #991b1b) center / 12px 3px no-repeat,
    #fee2e2;
}

.youtube-learning-search {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  padding: 18px 20px 20px;
}

.youtube-learning-search label {
  display: grid;
  gap: 8px;
  color: #334155;
  font-weight: 700;
}

.youtube-learning-search select {
  width: 100%;
  border: 1px solid rgba(15, 23, 42, 0.16);
  border-radius: 12px;
  background: #fff;
  color: #0f172a;
  font: inherit;
  padding: 12px 14px;
}

.youtube-learning-search button,
.youtube-learning-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
  color: #fff;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.2;
  padding: 12px 18px;
  text-decoration: none;
  transition: transform 140ms ease, box-shadow 140ms ease;
  white-space: nowrap;
}

.youtube-learning-search button {
  position: relative;
  min-width: 132px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 16px;
  background:
    linear-gradient(135deg, #111827 0%, #dc2626 54%, #f97316 100%);
  box-shadow: 0 14px 26px rgba(220, 38, 38, 0.24);
  letter-spacing: 0.04em;
}

.youtube-learning-search button > span {
  display: inline-block;
}

.youtube-learning-search button::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0) 38%);
  pointer-events: none;
}

.youtube-learning-search button:hover,
.youtube-learning-button:hover {
  box-shadow: 0 12px 22px rgba(220, 38, 38, 0.22);
  color: #fff;
  transform: translateY(-1px);
}

.youtube-learning-search button:hover {
  transform: translateY(-1px);
}

.youtube-learning-button--secondary {
  background: linear-gradient(135deg, #0f172a 0%, #334155 100%);
}

.youtube-learning-button--secondary:hover {
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.22);
}

.youtube-learning-search__filters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.youtube-learning-search__filters span {
  font-size: 0.86rem;
}

.youtube-learning-search__actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
}

.youtube-learning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.youtube-learning-card {
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.youtube-learning-card:hover {
  border-color: rgba(220, 38, 38, 0.2);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.1);
  transform: translateY(-3px);
}

.youtube-learning-card__thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  background: #0f172a;
  overflow: hidden;
  text-decoration: none;
}

.youtube-learning-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  transition: transform 180ms ease;
}

.youtube-learning-card:hover .youtube-learning-card__thumb img {
  transform: none;
}

.youtube-learning-card__thumb-placeholder {
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  color: #fff;
  font-weight: 800;
}

.youtube-learning-card__body {
  padding: 18px;
}

.youtube-learning-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-bottom: 10px;
  color: #64748b;
  font-size: 0.84rem;
  font-weight: 700;
}

.youtube-learning-card__title {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.55;
}

.youtube-learning-card__title a {
  color: #0f172a;
  text-decoration: none;
}

.youtube-learning-card__title a:hover {
  color: #dc2626;
}

.youtube-learning-card__reason {
  margin: 12px 0 0;
  color: #475569;
  line-height: 1.75;
}

.youtube-learning-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.youtube-learning-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #fee2e2;
  color: #991b1b;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 5px 9px;
}

.youtube-learning-tag--level {
  background: #dbeafe;
  color: #1d4ed8;
}

.youtube-learning-tag--worry {
  background: #fef3c7;
  color: #92400e;
}

.youtube-learning-empty {
  border: 1px dashed rgba(15, 23, 42, 0.2);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
}

.youtube-learning-player {
  position: relative;
  overflow: hidden;
  max-width: 980px;
  margin: 22px auto 22px;
  border-radius: 20px;
  background: #0f172a;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.16);
  aspect-ratio: 16 / 9;
}

.youtube-learning-player iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.youtube-learning-detail__content {
  display: grid;
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
}

.youtube-learning-section,
.youtube-learning-author-card,
.youtube-learning-tax-box {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
  padding: 16px 18px;
}

.youtube-learning-section + .youtube-learning-section {
  margin-top: 16px;
}

.youtube-learning-section h2,
.youtube-learning-author-card h2,
.youtube-learning-tax-box h2 {
  margin: 0 0 10px;
  color: #0f172a;
  font-size: 1.06rem;
  letter-spacing: -0.02em;
}

.youtube-learning-section__body,
.youtube-learning-section p {
  color: #334155;
  line-height: 1.75;
}

.youtube-learning-section__body > :first-child,
.youtube-learning-section p:first-child {
  margin-top: 0;
}

.youtube-learning-section__body > :last-child,
.youtube-learning-section p:last-child {
  margin-bottom: 0;
}

.youtube-learning-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.youtube-learning-detail__aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  gap: 16px;
}

.youtube-learning-author-card,
.youtube-learning-tax-box {
  align-content: center;
  min-height: 142px;
}

.youtube-learning-author-card__name {
  margin: 0;
  color: #0f172a;
  font-size: 1rem;
  font-weight: 800;
}

.youtube-learning-author-card dl {
  display: grid;
  gap: 10px;
  margin: 0 0 14px;
}

.youtube-learning-author-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  padding-bottom: 10px;
}

.youtube-learning-author-card dt {
  color: #64748b;
  font-size: 0.88rem;
  font-weight: 700;
}

.youtube-learning-author-card dd {
  margin: 0;
  color: #0f172a;
  font-weight: 800;
  text-align: right;
}

.youtube-learning-author-card .youtube-learning-button {
  margin-top: 14px;
}

.youtube-learning-author-card > .youtube-learning-button {
  align-self: center;
}

.youtube-learning-author-card--compact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px 18px;
  align-items: center;
}

.youtube-learning-author-card--compact .youtube-learning-button {
  margin-top: 0;
}

.youtube-learning-detail__back {
  border: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 64px 0 96px;
  text-align: center;
  width: 100%;
}

@media (max-width: 900px) {
  .youtube-learning-search__filters,
  .youtube-learning-detail__aside {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .youtube-learning-archive-page .page-header,
  .youtube-learning-detail .page-header {
    border-radius: 18px;
    margin-left: -4px;
    margin-right: -4px;
    padding: 18px 14px;
  }

  .youtube-learning-archive-page .page-title,
  .youtube-learning-detail .page-title {
    font-size: 1.55rem;
    line-height: 1.18;
    letter-spacing: -0.04em;
  }

  .youtube-learning-hero__label {
    margin-bottom: 6px;
  }

  .youtube-learning-detail__header .post-subtitle {
    font-size: 0.86rem;
    line-height: 1.5;
  }

  .youtube-learning-actions {
    flex-direction: column;
  }

  .youtube-learning-search button {
    width: 100%;
  }

  .youtube-learning-search__filters,
  .youtube-learning-grid,
  .youtube-learning-detail__aside {
    grid-template-columns: 1fr;
  }

  .youtube-learning-search,
  .youtube-learning-section,
  .youtube-learning-author-card,
  .youtube-learning-tax-box {
    padding: 15px;
  }

  .youtube-learning-author-card,
  .youtube-learning-tax-box {
    min-height: 0;
  }

  .youtube-learning-author-card--compact {
    grid-template-columns: 1fr;
  }

  .youtube-learning-detail__content,
  .youtube-learning-detail__aside {
    gap: 12px;
  }

  .youtube-learning-section + .youtube-learning-section {
    margin-top: 12px;
  }

  .youtube-learning-section h2,
  .youtube-learning-author-card h2,
  .youtube-learning-tax-box h2 {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .youtube-learning-search button,
  .youtube-learning-button,
  .youtube-learning-card,
  .youtube-learning-card__thumb img {
    transition: none !important;
  }
}