.research-detail-main {
  background:
    radial-gradient(circle at 88% 10%, rgba(201, 145, 58, 0.12), transparent 28%),
    radial-gradient(circle at 10% 42%, rgba(13, 61, 58, 0.08), transparent 30%),
    #fbfcf8;
}

.paper-hero {
  padding: 72px 0 58px;
  border-bottom: 1px solid rgba(13, 61, 58, 0.1);
}

.paper-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 48px;
  align-items: center;
}

.paper-kicker {
  color: #9a6720;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.paper-hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.07;
  max-width: 860px;
  margin-bottom: 20px;
}

.paper-lead {
  color: #294a46;
  font-size: 1rem;
  line-height: 1.75;
  max-width: 780px;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.detail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 6px;
  padding: 12px 20px;
  font-size: 0.85rem;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.detail-btn.primary {
  background: var(--nest-dark);
  color: #fff;
  box-shadow: 0 16px 30px rgba(13, 61, 58, 0.18);
}

.detail-btn.secondary {
  border: 1px solid rgba(13, 61, 58, 0.22);
  color: var(--nest-dark);
  background: rgba(255, 255, 255, 0.72);
}

.detail-btn:hover {
  transform: translateY(-2px);
}

.paper-meta-panel {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(13, 61, 58, 0.12);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 24px 60px rgba(13, 61, 58, 0.1);
}

.paper-meta-panel h2 {
  font-size: 1.15rem;
  margin-bottom: 18px;
}

.paper-meta-list {
  display: grid;
  gap: 16px;
}

.paper-meta-list div {
  border-bottom: 1px solid rgba(13, 61, 58, 0.1);
  padding-bottom: 14px;
}

.paper-meta-list div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.paper-meta-list span {
  display: block;
  color: #6b7f7a;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.paper-meta-list strong {
  display: block;
  color: var(--nest-dark);
  font-size: 0.95rem;
  line-height: 1.45;
}

.paper-body {
  padding: 62px 0;
}

.paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 42px;
  align-items: start;
}

.paper-section {
  background: #fff;
  border: 1px solid rgba(13, 61, 58, 0.1);
  border-radius: 8px;
  padding: 34px;
  margin-bottom: 22px;
  box-shadow: 0 18px 45px rgba(13, 61, 58, 0.06);
}

.paper-section h2 {
  font-size: 1.5rem;
  margin-bottom: 14px;
}

.paper-section p,
.paper-section li {
  color: #294a46;
  font-size: 0.96rem;
  line-height: 1.75;
}

.paper-section ul {
  display: grid;
  gap: 10px;
  padding-left: 20px;
  margin: 12px 0 0;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.metric {
  background: #f4f8f3;
  border: 1px solid rgba(13, 61, 58, 0.1);
  border-radius: 8px;
  padding: 18px;
}

.metric strong {
  display: block;
  color: var(--nest-dark);
  font-size: 1.45rem;
  line-height: 1;
  margin-bottom: 8px;
}

.metric span {
  color: #4b635f;
  font-size: 0.82rem;
  line-height: 1.45;
}

.paper-sidebar {
  position: sticky;
  top: 24px;
}

.sidebar-card {
  background: #0d3d3a;
  color: #fff;
  border-radius: 8px;
  padding: 26px;
  margin-bottom: 18px;
}

.sidebar-card.light {
  background: #fff;
  color: var(--nest-dark);
  border: 1px solid rgba(13, 61, 58, 0.1);
}

.sidebar-card h3 {
  color: inherit;
  font-size: 1rem;
  margin-bottom: 12px;
}

.sidebar-card p,
.sidebar-card li {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.86rem;
  line-height: 1.65;
}

.sidebar-card.light p,
.sidebar-card.light li {
  color: #294a46;
}

.sidebar-card ul {
  display: grid;
  gap: 9px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-link {
  display: block;
  color: var(--nest-dark);
  font-weight: 800;
  line-height: 1.45;
  padding: 12px 0;
  border-bottom: 1px solid rgba(13, 61, 58, 0.1);
}

.related-link:last-child {
  border-bottom: 0;
}

.related-link:hover {
  color: var(--nest-gold);
}

@media (max-width: 980px) {
  .paper-hero-grid,
  .paper-layout {
    grid-template-columns: 1fr;
  }

  .paper-sidebar {
    position: static;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .paper-hero {
    padding: 48px 0 42px;
  }

  .paper-section,
  .paper-meta-panel {
    padding: 24px;
  }
}