.paper-review-material-page {
  --study-accent: #5f91b3;
  --study-text: #30343a;
  --study-muted: #737b84;
  --study-line: #dfe3e7;
  --study-panel: #f7f9fb;
}

.paper-review-material-page .page {
  padding-inline-end: 0;
}

.paper-review-material-page .page__inner-wrap {
  position: relative;
  width: 100%;
  max-width: 1120px;
  padding-top: 1.55rem;
}

.paper-review-material-page .page__title {
  max-width: 820px;
  margin: 0;
  color: var(--study-text);
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.paper-review-material-page .detail-category-link {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--study-accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-decoration: none !important;
  text-transform: uppercase;
}

.paper-review-material-page .detail-category-link:hover,
.paper-review-material-page .detail-category-link:focus-visible {
  color: #3f7396;
  text-decoration: none !important;
}

.paper-review-material-page .page__meta,
.paper-review-material-page .page__taxonomy {
  display: none;
}

.paper-review-material-page .page__content {
  position: static !important;
  color: var(--study-text);
}

.study-shell {
  width: min(100%, 1080px);
}

.study-hero {
  margin: 0 0 0;
  padding: 1.35rem 0 1.25rem;
  border-bottom: 1px solid var(--study-line);
}

.study-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
}

.study-meta-item {
  min-height: 4.5rem;
  padding: 0.8rem 0.9rem;
  border-top: 1px solid var(--study-line);
  background: var(--study-panel);
}

.study-meta-item span {
  display: block;
  margin-bottom: 0.42rem;
  color: var(--study-accent);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.35;
  text-transform: uppercase;
}

.study-meta-item strong {
  display: block;
  color: var(--study-text);
  font-size: 0.82rem;
  line-height: 1.35;
}

.pdf-section {
  padding-top: 1.5rem;
}

.pdf-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.pdf-head h2 {
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--study-text);
  font-size: 1.38rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.paper-review-material-page .pdf-viewer {
  width: 100%;
  min-height: calc(100vh - 190px);
  border: 1px solid var(--study-line);
  border-radius: 6px;
  background: #f8fafc;
  overflow: hidden;
}

.paper-review-material-page .pdf-viewer iframe {
  display: block;
  width: 100%;
  height: calc(100vh - 190px);
  min-height: 620px;
  border: 0;
  background: #f8fafc;
}

.paper-review-material-page .page__comments {
  width: min(100%, 1080px);
  margin-top: 2rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--study-line);
}

.paper-review-material-page .page__comments-title {
  color: var(--study-accent);
  font-size: 1.12rem;
}

@media (max-width: 760px) {
  .paper-review-material-page .page__title {
    font-size: 1.5rem;
  }

  .study-hero {
    padding-top: 1.1rem;
  }

  .study-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pdf-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .paper-review-material-page .pdf-viewer {
    min-height: 0;
    border-inline: 0;
  }

  .paper-review-material-page .pdf-viewer iframe {
    display: none;
  }

  .paper-review-material-page .mobile-pdf-page {
    border-color: var(--study-line);
  }
}