.tool-shell {
  width: min(1400px, calc(100vw - 24px));
}

.compare-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.compare-pane {
  min-height: calc(100vh - 220px);
  padding: 16px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
}

.compare-divider {
  background: var(--border);
  width: 1px;
}

.compare-toolbar {
  display: grid;
  gap: 6px;
}

.frame-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  align-content: start;
}

.frame-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-strong);
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(20, 42, 49, 0.08);
}

.frame-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  background: #dfe8eb;
}

.frame-meta {
  padding: 8px 10px;
  display: grid;
  gap: 3px;
  font-size: 0.82rem;
}

.recon-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 14px;
  min-height: calc(100vh - 220px);
}

.recon-controls {
  display: grid;
  gap: 12px;
  align-content: start;
}

.metadata-panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-strong);
  padding: 10px;
  line-height: 1.4;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.recon-viewer-wrap {
  min-height: 520px;
}

.mesh-viewer-surface {
  width: 100%;
  height: 100%;
  min-height: 520px;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.75);
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--panel-strong);
  padding: 14px;
  color: var(--muted);
}

@media (max-width: 1100px) {
  .compare-layout {
    grid-template-columns: 1fr;
  }

  .compare-divider {
    display: none;
  }

  .recon-layout {
    grid-template-columns: 1fr;
  }
}