.post-reader-shell {
  margin: 0;
  min-height: 100vh;
  background: #eef1f4;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.post-reader-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid #e2e8e5;
  backdrop-filter: blur(8px);
}

.post-reader-topbar .back-link {
  color: #2563eb;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.post-reader-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.post-reader-actions button,
.post-reader-actions a {
  border: 0;
  background: transparent;
  color: #5c6670;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
}

.post-reader-main {
  padding: 0;
  min-height: calc(100vh - 52px);
}

.post-reader-frame {
  display: block;
  width: 100%;
  min-height: calc(100vh - 52px);
  border: 0;
  background: #f4f6f8;
}

.briefing-hub {
  display: grid;
  gap: 12px;
}

.briefing-card {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  text-align: left;
}

.briefing-card b {
  font-size: 15px;
}

.briefing-card small {
  color: var(--muted);
  font-size: 12px;
}

.briefing-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.briefing-card-actions a,
.briefing-card-actions button {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
}

.briefing-inline-preview {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #f4f6f8;
}

.briefing-inline-preview iframe {
  display: block;
  width: 100%;
  min-height: 520px;
  border: 0;
}

.briefing-post-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft, #eff6ff);
  color: #2563eb;
  font-size: 13px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}

.capability-card.power-card .capability-icon {
  background: linear-gradient(135deg, #dbeafe, #ecfdf5);
  color: #2563eb;
}

.artifacts.briefing-artifacts .artifact-card {
  border-color: #bfdbfe;
}

.artifacts.briefing-artifacts .artifact-top h3 {
  color: #1d4ed8;
}