main.site-main:has(.content-viewer) {
  max-width: none;
  margin: 0.75rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 10rem);
}

.content-viewer {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  gap: 0.65rem;
}

.viewer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
}

.viewer-title {
  font-weight: 600;
  font-size: 0.95rem;
  word-break: break-all;
}

.viewer-actions {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.viewer-actions a {
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border-soft);
  text-decoration: none;
  color: var(--accent);
}

.viewer-stage {
  flex: 1;
  min-height: min(70vh, 800px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.viewer-placeholder,
.viewer-error {
  padding: 2rem;
  color: var(--text-muted);
  text-align: center;
}

.viewer-error {
  color: #c41e3a;
}

.viewer-stage iframe {
  flex: 1;
  width: 100%;
  min-height: min(68vh, 780px);
  border: none;
  background: #fff;
}

.viewer-stage img {
  max-width: 100%;
  height: auto;
  margin: auto;
  display: block;
  padding: 1rem;
}

.viewer-code-wrap {
  flex: 1;
  overflow: auto;
  margin: 0;
  padding: 1rem 1.25rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  tab-size: 4;
  white-space: pre;
  color: var(--text);
  background: rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  .viewer-code-wrap {
    background: rgba(0, 0, 0, 0.35);
  }

  .viewer-stage iframe {
    background: #111;
  }
}

.viewer-download-card {
  padding: 2rem;
  text-align: center;
}

.viewer-download-card p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.viewer-download-card a {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}