.p-seminar-detail-hero {
  padding-top: calc(var(--header-height) + 32px);
}

.p-seminar-detail {
  padding: 120px 0 200px;
  background: var(--color-background);
}

.p-seminar-detail__layout {
  width: min(100%, 1120px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 680px) 360px;
  gap: 80px;
  align-items: start;
}

.p-seminar-detail__main {
  min-width: 0;
}

.p-seminar-detail__header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.p-seminar-detail__category {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 29px;
  padding: 4px 16px;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  font-size: var(--font-size-md-plus);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
}

.p-seminar-detail__title {
  color: var(--color-text);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  letter-spacing: 0.1em;
}

.p-seminar-detail__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 0;
  color: var(--color-text);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
}

.p-seminar-detail__date,
.p-seminar-detail__tag {
  font-family: var(--font-family-number);
}

.p-seminar-detail__date {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 21px;
  white-space: nowrap;
}

.p-seminar-detail__date-separator {
  font-family: var(--font-family-display-en);
}

.p-seminar-detail__status {
  display: inline-flex;
  align-items: center;
  min-height: 21px;
  margin-left: 8px;
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
  transform: translateY(-1px);
}

.p-seminar-detail__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 18px;
  margin-left: 16px;
  padding: 0 4px;
  border: 0.5px solid var(--color-primary-alpha);
  color: var(--color-primary-alpha);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
}

.p-seminar-detail__body {
  margin-top: 80px;
  color: var(--color-text);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  letter-spacing: 0.05em;
}

.p-seminar-detail__body > * + * {
  margin-top: 28px;
}

.p-seminar-detail__body p {
  text-align: justify;
}

.p-seminar-detail__body a {
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

.p-seminar-detail__body a:hover {
  color: rgba(54, 54, 59, 0.68);
}

.p-seminar-detail__text-link {
  line-height: var(--line-height-normal);
}

.p-seminar-detail__body img,
.p-seminar-detail__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.p-seminar-detail__figure {
  margin: 64px 0 0;
}

.p-seminar-detail__pdf {
  margin-top: 16px;
  color: var(--color-text);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
}

.p-seminar-detail__pdf a {
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

.p-seminar-detail__pdf a:hover {
  color: rgba(54, 54, 59, 0.68);
}

.p-seminar-overview {
  margin-top: 64px;
  padding: 40px;
  background: var(--color-section-background-light);
}

.p-seminar-overview__title {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  font-size: var(--font-size-lg-plus);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  letter-spacing: 0.1em;
}

.p-seminar-overview__content {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  color: var(--color-text);
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  letter-spacing: 0.08em;
}

.p-seminar-overview__content p {
  text-align: justify;
}

.p-seminar-action {
  margin-top: 64px;
}

.p-seminar-action__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-width: 280px;
  min-height: 56px;
  padding: 14px 32px;
  background: var(--color-text);
  color: var(--color-white);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
  transition: opacity 0.2s ease;
}

.p-seminar-action__button:hover {
  opacity: 0.72;
}

.p-seminar-action__button img {
  display: block;
  width: 22px;
  height: auto;
  flex: 0 0 auto;
}

.p-seminar-detail-nav {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 80px;
}

.p-seminar-detail-nav__back {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  width: fit-content;
  margin-inline: auto;
  color: var(--color-text);
  font-size: var(--font-size-lg-plus);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
  transition: color 0.2s ease;
}

.p-seminar-detail-nav__back:hover {
  color: rgba(54, 54, 59, 0.68);
}

.p-seminar-detail-nav__circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  flex: 0 0 auto;
}

.p-seminar-detail-nav__circle span {
  position: relative;
  width: 12px;
  height: 1px;
  background: currentColor;
}

.p-seminar-detail-nav__circle span::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 6px;
  height: 6px;
  border-top: 1px solid currentColor;
  border-left: 1px solid currentColor;
  transform: translateY(-50%) rotate(-45deg);
}

.p-seminar-related {
  position: sticky;
  top: calc(var(--header-height) + 32px);
}

.p-seminar-related__heading {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  font-family: var(--font-family-number);
  font-size: var(--font-size-lg-plus);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  letter-spacing: 0.1em;
}

.p-seminar-related__list {
  display: grid;
  gap: 32px;
  margin-top: 24px;
}

.p-seminar-related__item {
  display: grid;
  grid-template-columns: 136px minmax(0, 1fr);
  gap: 16px;
  color: var(--color-text);
}

.p-seminar-related__thumb {
  width: 136px;
  aspect-ratio: 240 / 168;
  background: var(--color-section-background-light);
  overflow: hidden;
}

.p-seminar-related__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.p-seminar-related__title {
  display: -webkit-box;
  overflow: hidden;
  color: var(--color-text);
  font-size: var(--font-size-md-plus);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  letter-spacing: 0.1em;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  transition: color 0.2s ease;
}

.p-seminar-related__date {
  display: block;
  margin-top: 4px;
  color: var(--color-text);
  font-family: var(--font-family-number);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
  letter-spacing: 0.08em;
}

.p-seminar-related__item:hover .p-seminar-related__title {
  color: rgba(54, 54, 59, 0.68);
}

@media (max-width: 1024px) {
  .p-seminar-detail {
    padding-top: 96px;
  }

  .p-seminar-detail__layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 72px;
    width: min(100%, 880px);
  }

  .p-seminar-detail__title {
    font-size: var(--font-size-3xl);
  }

  .p-seminar-related {
    position: static;
  }

  .p-seminar-related__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .p-seminar-related__item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .p-seminar-related__thumb {
    width: 100%;
  }
}

@media (max-width: 767px) {
  .p-seminar-detail-hero {
    padding-top: calc(var(--header-height) + 20px);
  }

  .p-seminar-detail {
    padding: 72px 0 96px;
  }

  .p-seminar-detail__layout {
    gap: 56px;
  }

  .p-seminar-detail__header {
    gap: 18px;
  }

  .p-seminar-detail__category {
    min-height: 27px;
    padding: 3px 12px;
    font-size: var(--font-size-xs);
  }

  .p-seminar-detail__title {
    font-size: var(--font-size-2xl);
    letter-spacing: 0.06em;
  }

  .p-seminar-detail__meta {
    gap: 6px 8px;
    font-size: var(--font-size-md);
  }

  .p-seminar-detail__status,
  .p-seminar-detail__tag {
    margin-left: 0;
  }

  .p-seminar-detail__body {
    margin-top: 48px;
    font-size: var(--font-size-md);
    letter-spacing: 0.04em;
  }

  .p-seminar-detail__body > * + * {
    margin-top: 22px;
  }

  .p-seminar-detail__figure,
  .p-seminar-overview {
    margin-top: 48px;
  }

  .p-seminar-overview {
    padding: 28px 24px;
  }

  .p-seminar-overview__title {
    font-size: var(--font-size-base);
  }

  .p-seminar-overview__content {
    font-size: var(--font-size-md);
  }

  .p-seminar-action {
    margin-top: 40px;
  }

  .p-seminar-action__button {
    width: 100%;
    min-width: 0;
  }

  .p-seminar-detail-nav {
    margin-top: 56px;
  }

  .p-seminar-detail-nav__back {
    font-size: var(--font-size-base);
  }

  .p-seminar-related__list {
    grid-template-columns: 1fr;
  }

  .p-seminar-related__item {
    grid-template-columns: 112px minmax(0, 1fr);
    align-items: center;
  }

  .p-seminar-related__thumb {
    width: 112px;
  }
}